1# Copyright (C) 1991-2022 Free Software Foundation, Inc. 2# This file is part of the GNU C Library. 3 4# The GNU C Library is free software; you can redistribute it and/or 5# modify it under the terms of the GNU Lesser General Public 6# License as published by the Free Software Foundation; either 7# version 2.1 of the License, or (at your option) any later version. 8 9# The GNU C Library is distributed in the hope that it will be useful, 10# but WITHOUT ANY WARRANTY; without even the implied warranty of 11# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 12# Lesser General Public License for more details. 13 14# You should have received a copy of the GNU Lesser General Public 15# License along with the GNU C Library; if not, see 16# <https://www.gnu.org/licenses/>. 17 18# 19# Common rules for making the GNU C library. This file is included 20# by the top-level Makefile and by all subdirectory makefiles 21# (through Rules). 22# 23ifneq (,) 24This makefile requires GNU Make. 25endif 26 27REQUIRED_MAKE_VERSION = 3.74 28REAL_MAKE_VERSION = $(firstword $(MAKE_VERSION)) 29 30ifneq ($(REQUIRED_MAKE_VERSION), \ 31 $(firstword $(sort $(REAL_MAKE_VERSION) $(REQUIRED_MAKE_VERSION)))) 32Wrong GNU Make version. See above for the version needed. 33endif 34 35 36ifdef subdir 37.. := ../ 38endif # subdir 39 40# If `sources' was defined by the parent makefile, undefine it so 41# we will later get it from wildcard search in this directory. 42ifneq "$(findstring env,$(origin sources))" "" 43sources := 44endif 45 46oPATH := $(PATH) 47PATH := this definition should take precedence over $(oPATH) 48ifeq ($(PATH),$(oPATH)) 49You must not use the -e flag when building the GNU C library. 50else 51PATH := $(oPATH) 52endif 53 54ifndef +included-Makeconfig 55include $(..)Makeconfig 56endif 57 58# This variable is used in ``include $(o-iterator)'' after defining 59# $(o-iterator-doit) to produce some desired rule using $o for the object 60# suffix, and setting $(object-suffixes-left) to $(object-suffixes); a copy 61# is produced for each object suffix in use. 62o-iterator = $(patsubst %,$(..)o-iterator.mk,$(object-suffixes-left)) 63 64# Include any system-specific makefiles. 65 66# This is here so things in sysdep Makefiles can easily depend on foo.h as 67# appropriate and not worry about where foo.h comes from, which may be 68# system dependent and not known by that Makefile. 69vpath %.h $(subst $(empty) ,:,$(strip $(common-objpfx) $(objpfx) \ 70 $(+sysdep_dirs) $(..))) 71 72# The same is true for RPC source files. 73vpath %.x $(subst $(empty) ,:,$(strip $(common-objpfx) $(objpfx) \ 74 $(+sysdep_dirs) $(..))) 75 76# Some sysdep makefiles use this to distinguish being included here from 77# being included individually by a subdir makefile (hurd/Makefile needs this). 78in-Makerules := yes 79 80sysdep-makefiles := $(wildcard $(sysdirs:=/Makefile)) 81ifneq (,$(sysdep-makefiles)) 82include $(sysdep-makefiles) 83endif 84 85 86# Reorder before-compile so that mach things come first, and hurd things 87# second, before all else. The mach and hurd subdirectories have many 88# generated header files which the much of rest of the library depends on, 89# so it is best to build them first (and mach before hurd, at that). 90before-compile := $(filter $(common-objpfx)mach% $(common-objpfx)hurd%,\ 91 $(before-compile)) \ 92 $(filter-out $(common-objpfx)mach% $(common-objpfx)hurd%,\ 93 $(before-compile)) 94 95# Even before that, we need abi-versions.h which is generated right here. 96ifeq ($(build-shared),yes) 97ifndef avoid-generated 98before-compile := $(common-objpfx)abi-versions.h $(before-compile) 99$(common-objpfx)abi-versions.h: $(..)scripts/abi-versions.awk \ 100 $(common-objpfx)Versions.all 101 LC_ALL=C $(AWK) -f $^ > $@T 102 mv -f $@T $@ 103 104$(common-objpfx)%.latest: $(common-objpfx)abi-versions.h 105 sed -n '/ VERSION_$*_/{s/^.*_\([A-Z0-9_]*\).*$$/\1/;h;};$${g;p;}' \ 106 $(common-objpfx)abi-versions.h > $@T 107 mv -f $@T $@ 108 109# first-versions.h and ldbl-compat-choose.h provide macros used in 110# various symbol versioning macro calls. 111before-compile := $(common-objpfx)first-versions.h \ 112 $(common-objpfx)ldbl-compat-choose.h $(before-compile) 113$(common-objpfx)first-versions.h: $(common-objpfx)versions.stmp 114$(common-objpfx)ldbl-compat-choose.h: $(common-objpfx)versions.stmp 115endif # avoid-generated 116endif # $(build-shared) = yes 117 118ifndef avoid-generated 119ifneq (,$(CXX)) 120# If C++ headers <cstdlib> or <cmath> are used, GCC 6 will include 121# /usr/include/stdlib.h or /usr/include/math.h from "#include_next" 122# (instead of stdlib/stdlib.h or math/math.h in the glibc source 123# directory), and this turns up as a make dependency. An implicit 124# rule will kick in and make will try to install stdlib/stdlib.h or 125# math/math.h as /usr/include/stdlib.h or /usr/include/math.h because 126# the target is out of date. We make a copy of <cstdlib> and <cmath> 127# in the glibc build directory so that stdlib/stdlib.h and math/math.h 128# will be used instead of /usr/include/stdlib.h and /usr/include/math.h. 129before-compile := $(common-objpfx)cstdlib $(common-objpfx)cmath \ 130 $(before-compile) 131$(common-objpfx)cstdlib: $(c++-cstdlib-header) 132 $(INSTALL_DATA) $< $@T 133 $(move-if-change) $@T $@ 134$(common-objpfx)cmath: $(c++-cmath-header) 135 $(INSTALL_DATA) $< $@T 136 $(move-if-change) $@T $@ 137ifneq (,$(c++-bits-std_abs-h)) 138# Also make a copy of <bits/std_abs.h> from GCC 7 to prevent it from 139# including /usr/include/stdlib.h. 140before-compile := $(common-objpfx)bits/std_abs.h $(before-compile) 141$(common-objpfx)bits/std_abs.h: $(c++-bits-std_abs-h) 142 $(INSTALL_DATA) $< $@T 143 $(move-if-change) $@T $@ 144endif 145endif 146 147before-compile := $(common-objpfx)libc-abis.h $(before-compile) 148$(common-objpfx)libc-abis.h: $(common-objpfx)libc-abis.stamp; @: 149$(common-objpfx)libc-abis.stamp: $(..)scripts/gen-libc-abis \ 150 $(firstword $(wildcard $(sysdirs:=/libc-abis)) \ 151 $(..)libc-abis) \ 152 $(..)Makerules 153 $(SHELL) $< \ 154 $(base-machine)-$(config-vendor)-$(config-os) \ 155 < $(word 2,$^) > $(@:.stamp=.h)T 156 $(move-if-change) $(@:.stamp=.h)T $(@:.stamp=.h) 157 touch $@ 158common-generated += $(common-objpfx)libc-abis.h 159endif # avoid-generated 160 161ifeq (yes,$(build-shared)) 162$(common-objpfx)runtime-linker.h: $(common-objpfx)runtime-linker.stamp; @: 163$(common-objpfx)runtime-linker.stamp: $(common-objpfx)config.make 164 $(make-target-directory) 165 echo '#define RUNTIME_LINKER "$(rtlddir)/$(rtld-installed-name)"' \ 166 > ${@:stamp=T} 167 $(move-if-change) ${@:stamp=T} ${@:stamp=h} 168 touch $@ 169endif 170 171# Make sure the subdirectory for object files gets created. 172ifdef objpfx 173ifeq (,$(wildcard $(objpfx).)) 174before-compile += $(objpfx). 175$(objpfx).: 176 $(make-target-directory) 177endif 178endif 179 180# Remove existing files from `before-compile'. Things are added there when 181# they must exist for dependency generation to work right, but once they 182# exist there is no further need for every single file to depend on them, 183# and those gratuitous dependencies result in many gratuitous 184# recompilations. 185before-compile := $(filter-out $(wildcard $(before-compile)),$(before-compile)) 186 187# Don't let any before-compile file be an intermediate and get removed. 188ifdef before-compile 189$(before-compile): 190endif 191 192# We don't want $(common-objpfx) files to depend on miscellaneous stuff 193# in subdirs. 194ifdef subdir 195common-before-compile := $(filter-out $(objpfx)%,$(before-compile)) 196else 197common-before-compile = $(before-compile) 198endif 199 200ifndef subdir 201# If a makefile needs to do something conditional on something that 202# can only be figured out from headers, write a FOO.make.c input 203# file that uses cpp contructs and contains @@@ LINE @@@ for each LINE 204# to emit in the generated makefile, and use -include $(common-objpfx)FOO.make. 205# 206# We only generate these in the top-level makefile, to avoid any weirdness 207# from subdir-specific makefile tweaks creeping in on an update. 208$(common-objpfx)%.make: $(..)%.make.c $(..)Makerules $(common-before-compile) 209 rm -f $@T $@.dT 210 (echo '# Generated from $*.make.c by Makerules.'; \ 211 $(CC) $(CFLAGS) $(CPPFLAGS) -E -DASSEMBLER $< \ 212 -MD -MP -MT '$$(common-objpfx)$*.make' -MF $@.dT \ 213 | sed -n '/@@@/{s/@@@[ ]*\(.*\)@@@/\1/;s/[ ]*$$//p;}'; \ 214 echo 'common-generated += $(@F)'; \ 215 sed $(sed-remove-objpfx) $(sed-remove-dotdot) $@.dT; \ 216 rm -f $@.dT) > $@T 217 mv -f $@T $@ 218endif 219 220ifdef subdir 221sed-remove-dotdot := -e 's@ *\.\.\/\([^ \]*\)@ $$(..)\1@g' \ 222 -e 's@^\.\.\/\([^ \]*\)@$$(..)\1@g' 223else 224sed-remove-dotdot := -e 's@ *\([^ \/$$][^ \]*\)@ $$(..)\1@g' \ 225 -e 's@^\([^ \/$$][^ \]*\)@$$(..)\1@g' 226endif 227 228ifdef gen-py-const-headers 229# We'll use a static pattern rule to match .pysym files with their 230# corresponding generated .py files. 231# The generated .py files go in the submodule's dir in the glibc build dir. 232py-const-files := $(patsubst %.pysym,%.py,$(gen-py-const-headers)) 233py-const-dir := $(objpfx) 234py-const := $(addprefix $(py-const-dir),$(py-const-files)) 235py-const-script := $(..)scripts/gen-as-const.py 236 237# This is a hack we use to generate .py files with constants for 238# Python code. 239# 240# $@.tmp is a temporary file we use to store the partial contents of 241# the target file. We do this instead of just writing on $@ because, 242# if the build process terminates prematurely, re-running Make 243# wouldn't run this rule since Make would see that the target file 244# already exists (despite it being incomplete). 245# 246# The output is redirected to a .py file; we'll import it in the main 247# Python code to read the constants generated by gen-as-const.py. 248$(py-const): $(py-const-dir)%.py: %.pysym $(py-const-script) \ 249 $(common-before-compile) 250 $(make-target-directory) 251 $(PYTHON) $(py-const-script) --python \ 252 --cc="$(CC) $(CFLAGS) $(CPPFLAGS)" $< \ 253 > $@.tmp 254 mv -f $@.tmp $@ 255 256generated += $(py-const) 257endif # gen-py-const-headers 258 259ifdef gen-as-const-headers 260# Generating headers for assembly constants. 261# We need this defined early to get into before-compile before 262# it's used in sysd-rules, below. 263# Define GEN_AS_CONST_HEADERS to avoid circular dependency [BZ #22792]. 264# NB: <tcb-offsets.h> is generated from tcb-offsets.sym to define 265# offsets and sizes of types in <tls.h> and maybe <pthread.h> which 266# may include <tcb-offsets.h>. Target header files can check if 267# GEN_AS_CONST_HEADERS is defined to avoid circular dependency which 268# may lead to build hang on a many-core machine. 269$(common-objpfx)%.h $(common-objpfx)%.h.d: $(..)scripts/gen-as-const.py \ 270 %.sym $(common-before-compile) 271 $(PYTHON) $< --cc="$(CC) $(CFLAGS) $(CPPFLAGS) -DGEN_AS_CONST_HEADERS \ 272 -MD -MP -MF $(@:.h=.h.d)T \ 273 -MT '$(@:.h=.h.d) $(@:.h.d=.h)'" \ 274 $(filter %.sym,$^) > $(@:.h.d=.h)T 275 sed $(sed-remove-objpfx) $(sed-remove-dotdot) \ 276 $(@:.h=.h.d)T > $(@:.h=.h.d)T2 277 rm -f $(@:.h=.h.d)T 278 mv -f $(@:.h=.h.d)T2 $(@:.h=.h.d) 279 mv -f $(@:.h.d=.h)T $(@:.h.d=.h) 280vpath %.sym $(sysdirs) 281before-compile += $(gen-as-const-headers:%.sym=$(common-objpfx)%.h) 282 283tests-internal += $(gen-as-const-headers:%.sym=test-as-const-%) 284generated += $(gen-as-const-headers:%.sym=test-as-const-%.c) 285$(objpfx)test-as-const-%.c: $(..)scripts/gen-as-const.py $(..)Makerules \ 286 %.sym $(common-objpfx)%.h 287 ($(AWK) '{ sub(/^/, "asconst_", $$2); print; }' $(filter %.h,$^); \ 288 $(PYTHON) $< --test $(filter %.sym,$^)) > $@T 289 mv -f $@T $@ 290endif 291 292ifeq (yes,$(build-shared)) 293# Generate the header containing the names of all shared libraries. 294# We use a stamp file to avoid unnecessary recompilations. 295before-compile += $(common-objpfx)gnu/lib-names.h 296ifeq ($(soversions.mk-done),t) 297ifndef abi-variants 298lib-names-h-abi = gnu/lib-names.h 299lib-names-stmp-abi = gnu/lib-names.stmp 300else 301lib-names-h-abi = gnu/lib-names-$(default-abi).h 302lib-names-stmp-abi = gnu/lib-names-$(default-abi).stmp 303before-compile += $(common-objpfx)$(lib-names-h-abi) 304common-generated += gnu/lib-names.h 305install-others-nosubdir: $(inst_includedir)/$(lib-names-h-abi) 306$(common-objpfx)gnu/lib-names.h: 307 $(make-target-directory) 308 { \ 309 echo '/* This file is automatically generated.';\ 310 echo ' It defines macros to allow user program to find the shared'; \ 311 echo ' library files which come as part of GNU libc. */'; \ 312 echo '#ifndef __GNU_LIB_NAMES_H'; \ 313 echo '#define __GNU_LIB_NAMES_H 1'; \ 314 echo ''; \ 315 $(if $(abi-includes), \ 316 $(foreach h,$(abi-includes), echo '#include <$(h)>';) \ 317 echo '';) \ 318 $(foreach v,$(abi-variants),\ 319 $(if $(abi-$(v)-condition),\ 320 echo '#if $(abi-$(v)-condition)'; \ 321 echo '# include <gnu/lib-names-$(v).h>'); \ 322 $(if $(abi-$(v)-condition),echo '#endif';)) \ 323 echo ''; \ 324 echo '#endif /* gnu/lib-names.h */'; \ 325 } > $@ 326endif 327$(common-objpfx)$(lib-names-h-abi): $(common-objpfx)$(lib-names-stmp-abi); @: 328$(common-objpfx)$(lib-names-stmp-abi): $(..)scripts/lib-names.awk \ 329 $(common-objpfx)soversions.i 330 $(make-target-directory) 331 { \ 332 $(if $(abi-variants), \ 333 echo '/* This file is automatically generated. */';\ 334 echo '#ifndef __GNU_LIB_NAMES_H'; \ 335 echo '# error "Never use <$(lib-names-h-abi)> directly; include <gnu/lib-names.h> instead."'; \ 336 echo '#endif';, \ 337 echo '/* This file is automatically generated.';\ 338 echo ' It defines macros to allow user program to find the shared'; \ 339 echo ' library files which come as part of GNU libc. */'; \ 340 echo '#ifndef __GNU_LIB_NAMES_H'; \ 341 echo '#define __GNU_LIB_NAMES_H 1';) \ 342 echo ''; \ 343 ($(foreach s,$(all-sonames), echo $(s);)) \ 344 | LC_ALL=C $(AWK) -f $(firstword $^) | LC_ALL=C sort; \ 345 $(if $(abi-variants),, \ 346 echo ''; \ 347 echo '#endif /* gnu/lib-names.h */';) \ 348 } > ${@:stmp=T} 349 $(move-if-change) ${@:stmp=T} ${@:stmp=h} 350 touch $@ 351endif 352common-generated += $(lib-names-h-abi) $(lib-names-stmp-abi) 353endif 354 355############################################################################### 356# NOTE! Everything adding to before-compile needs to come before this point! # 357############################################################################### 358 359# Generate an ordered list of implicit rules which find the source files in 360# each sysdep directory. The old method was to use vpath to search all the 361# sysdep directories. However, that had the problem that a .S file in a 362# later directory would be chosen over a .c file in an earlier directory, 363# which does not preserve the desired sysdeps ordering behavior. 364 365# System-dependent makefiles can put in `inhibit-sysdep-asm' regexps 366# matching sysdep directories whose assembly source files should be 367# suppressed. 368 369-include $(common-objpfx)sysd-rules 370ifneq ($(sysd-rules-sysdirs),$(config-sysdirs)) 371# The value of $(+sysdep_dirs) the sysd-rules was computed for 372# differs from the one we are using now. So force a rebuild of sysd-rules. 373sysd-rules-force = FORCE 374FORCE: 375endif 376$(common-objpfx)sysd-rules: $(..)scripts/sysd-rules.awk \ 377 $(common-objpfx)config.make $(..)Makerules \ 378 $(sysdep-makefiles) $(sysdep-makeconfigs) \ 379 $(sysd-rules-force) 380 -@rm -f $@T 381 LC_ALL=C $(AWK) -f $< > $@T \ 382 -v all_object_suffixes='$(all-object-suffixes)' \ 383 -v inhibit_sysdep_asm='$(inhibit-sysdep-asm)' \ 384 -v sysd_rules_patterns='$(sysd-rules-patterns)' \ 385 -v config_sysdirs='$(config-sysdirs)' 386 mv -f $@T $@ 387 388ifndef sysd-rules-done 389# Don't do deps until this exists, because it provides rules to make the deps. 390no_deps=t 391endif 392 393define o-iterator-doit 394$(objpfx)%$o: %.S $(before-compile); $$(compile-command.S) 395endef 396object-suffixes-left := $(all-object-suffixes) 397include $(o-iterator) 398 399define o-iterator-doit 400$(objpfx)%$o: %.c $(before-compile); $$(compile-command.c) 401endef 402object-suffixes-left := $(all-object-suffixes) 403include $(o-iterator) 404 405define o-iterator-doit 406$(objpfx)%$o: %.cc $(before-compile); $$(compile-command.cc) 407endef 408object-suffixes-left := $(all-object-suffixes) 409include $(o-iterator) 410 411# Omit the objpfx rules when building in the source tree, because 412# objpfx is empty and so these rules just override the ones above. 413ifdef objpfx 414# Define first rules to find the source files in $(objpfx). 415# Generated source files will end up there. 416define o-iterator-doit 417$(objpfx)%$o: $(objpfx)%.S $(before-compile); $$(compile-command.S) 418endef 419object-suffixes-left := $(all-object-suffixes) 420include $(o-iterator) 421 422define o-iterator-doit 423$(objpfx)%$o: $(objpfx)%.c $(before-compile); $$(compile-command.c) 424endef 425object-suffixes-left := $(all-object-suffixes) 426include $(o-iterator) 427 428define o-iterator-doit 429$(objpfx)%$o: $(objpfx)%.cc $(before-compile); $$(compile-command.cc) 430endef 431object-suffixes-left := $(all-object-suffixes) 432include $(o-iterator) 433endif 434 435# Generate .dT files as we compile. 436compile-mkdep-flags = -MD -MP -MF $@.dt -MT $@ 437compile-command.S = $(compile.S) $(OUTPUT_OPTION) $(compile-mkdep-flags) 438compile-command.c = $(compile.c) $(OUTPUT_OPTION) $(compile-mkdep-flags) 439compile-command.cc = $(compile.cc) $(OUTPUT_OPTION) $(compile-mkdep-flags) 440 441# Like compile-mkdep-flags, but for use with $(BUILD_CC). We don't want to 442# track system includes here, they may spuriously trigger an install rule, 443# and would cause the check-local-headers test to fail. 444native-compile-mkdep-flags = -MMD -MP -MF $@.dt -MT $@ 445 446# GCC can grok options after the file name, and it looks nicer that way. 447compile.c = $(CC) $< -c $(CFLAGS) $(CPPFLAGS) 448compile.cc = $(CXX) $< -c $(CXXFLAGS) $(CPPFLAGS) 449compile.S = $(CC) $< -c $(CPPFLAGS) $(S-CPPFLAGS) \ 450 $(ASFLAGS) $(ASFLAGS-$(suffix $@)) 451COMPILE.c = $(CC) -c $(CFLAGS) $(CPPFLAGS) 452COMPILE.S = $(CC) -c $(CPPFLAGS) $(S-CPPFLAGS) \ 453 $(ASFLAGS) $(ASFLAGS-$(suffix $@)) 454 455# We need this for the output to go in the right place. It will default to 456# empty if make was configured to work with a cc that can't grok -c and -o 457# together. You can't compile the C library with such a compiler. 458OUTPUT_OPTION = -o $@ 459 460# This is the end of the pipeline for compiling generated C code. 461compile-stdin.c = $(COMPILE.c) -o $@ -x c - $(compile-mkdep-flags) 462 463# We need the $(CFLAGS) to be in there to have the right predefines during 464# the dependency run for C sources. But having it for assembly sources can 465# get the wrong predefines. 466S-CPPFLAGS = -DASSEMBLER $(asm-CPPFLAGS) 467 468ifneq (,$(objpfx)) 469# Continuation lines here are dangerous because they introduce spaces! 470define sed-remove-objpfx 471-e 's@ $(subst .,\.,$(subst @,\@,$(common-objpfx)))@ $$(common-objpfx)@g' \ 472-e 's@^$(subst .,\.,$(subst @,\@,$(common-objpfx)))@$$(common-objpfx)@g' 473endef 474endif 475 476# Modify the list of routines we build for different targets 477 478ifeq (yes,$(build-shared)) 479ifndef libc.so-version 480# Undefine this because it can't work when we libc.so is unversioned. 481static-only-routines = 482endif 483endif 484 485elide-routines.oS += $(filter-out $(static-only-routines),\ 486 $(routines) $(aux) $(sysdep_routines)) 487elide-routines.os += $(static-only-routines) 488 489# If we have versioned code we don't need the old versions in any of the 490# static libraries. 491elide-routines.o += $(shared-only-routines) 492elide-routines.op += $(shared-only-routines) 493 494# Shared library building. 495 496ifeq (yes,$(build-shared)) 497 498# Reference map file only when shared libraries are built and a map file name 499# is given. 500ifeq ($(build-shared),yes) 501map-file = $(firstword $($(@F:.so=-map)) \ 502 $(addprefix $(common-objpfx), \ 503 $(filter $(@F:.so=.map),$(version-maps)))) 504load-map-file = $(map-file:%=-Wl,--version-script=%) 505endif 506 507# Compiler arguments to use to link a shared object with libc and 508# ld.so. This is intended to be as similar as possible to a default 509# link with an installed libc. 510link-libc-args = -Wl,--start-group \ 511 $(libc-for-link) \ 512 $(common-objpfx)libc_nonshared.a \ 513 -Wl,--as-needed $(elf-objpfx)ld.so -Wl,--no-as-needed \ 514 -Wl,--end-group 515 516# The corresponding shared libc to use. This may be modified for a 517# particular target. 518libc-for-link = $(common-objpfx)libc.so 519 520# The corresponding dependencies. As these are used in dependencies, 521# not just commands, they cannot use target-specific variables so need 522# to name both possible libc.so objects. 523link-libc-deps = $(common-objpfx)libc.so $(common-objpfx)linkobj/libc.so \ 524 $(common-objpfx)libc_nonshared.a $(elf-objpfx)ld.so 525 526# Pattern rule to build a shared object from an archive of PIC objects. 527# This must come after the installation rules so Make doesn't try to 528# build shared libraries in place from the installed *_pic.a files. 529# $(LDLIBS-%.so) may contain -l switches to generate run-time dependencies 530# on other shared objects. The linking with libc and ld.so is intended 531# to be as similar as possible to a default link with an installed libc. 532lib%.so: lib%_pic.a $(+preinit) $(+postinit) $(link-libc-deps) 533 $(build-shlib) $(link-libc-args) 534 $(call after-link,$@) 535 536define build-shlib-helper 537$(LINK.o) -shared -static-libgcc -Wl,-O1 $(sysdep-LDFLAGS) \ 538 $(if $($(@F)-no-z-defs)$(no-z-defs),,-Wl,-z,defs) $(rtld-LDFLAGS) \ 539 $(if $($(@F)-no-dt-relr),$(no-dt-relr-ldflag),$(dt-relr-ldflag)) \ 540 $(extra-B-$(@F:lib%.so=%).so) -B$(csu-objpfx) \ 541 $(extra-B-$(@F:lib%.so=%).so) $(load-map-file) \ 542 -Wl,-soname=lib$(libprefix)$(@F:lib%.so=%).so$($(@F)-version) \ 543 $(LDFLAGS.so) $(LDFLAGS-lib.so) $(LDFLAGS-$(@F:lib%.so=%).so) \ 544 -L$(subst :, -L,$(rpath-link)) -Wl,-rpath-link=$(rpath-link) 545endef 546 547ifeq (yes,$(use-default-link)) 548# If the linker is good enough, we can let it use its default linker script. 549shlib-lds = 550shlib-lds-flags = 551else 552# binutils only position loadable notes into the first page for binaries, 553# not for shared objects 554$(common-objpfx)shlib.lds: $(common-objpfx)config.make $(..)Makerules 555 $(LINK.o) -shared -Wl,-O1 \ 556 -nostdlib -nostartfiles \ 557 $(sysdep-LDFLAGS) $(rtld-LDFLAGS) $(LDFLAGS.so) \ 558 -Wl,--verbose 2>/dev/null | \ 559 sed > $@T \ 560 -e '/^=========/,/^=========/!d;/^=========/d' \ 561 -e 's/^.*\*(\.dynbss).*$$/& \ 562 PROVIDE(__start___libc_freeres_ptrs = .); \ 563 *(__libc_freeres_ptrs) \ 564 PROVIDE(__stop___libc_freeres_ptrs = .);/'\ 565 -e 's@^.*\*(\.jcr).*$$@& \ 566 PROVIDE(__start___libc_subfreeres = .);\ 567 __libc_subfreeres : { *(__libc_subfreeres) }\ 568 PROVIDE(__stop___libc_subfreeres = .);\ 569 PROVIDE(__start___libc_atexit = .);\ 570 __libc_atexit : { *(__libc_atexit) }\ 571 PROVIDE(__stop___libc_atexit = .);\ 572 PROVIDE(__start___libc_IO_vtables = .);\ 573 __libc_IO_vtables : { *(__libc_IO_vtables) }\ 574 PROVIDE(__stop___libc_IO_vtables = .);\ 575 /DISCARD/ : { *(.gnu.glibc-stub.*) }@' 576 test -s $@T 577 mv -f $@T $@ 578common-generated += shlib.lds 579 580shlib-lds = $(common-objpfx)shlib.lds 581shlib-lds-flags = -T $(shlib-lds) 582endif 583 584define build-shlib 585$(build-shlib-helper) -o $@ $(shlib-lds-flags) \ 586 $(csu-objpfx)abi-note.o $(build-shlib-objlist) 587endef 588 589define build-module-helper 590$(LINK.o) -shared -static-libgcc $(sysdep-LDFLAGS) $(rtld-LDFLAGS) \ 591 $(if $($(@F)-no-z-defs)$(no-z-defs),,-Wl,-z,defs) \ 592 $(if $($(@F)-no-dt-relr),$(no-dt-relr-ldflag),$(dt-relr-ldflag)) \ 593 -B$(csu-objpfx) $(load-map-file) \ 594 $(LDFLAGS.so) $(LDFLAGS-$(@F:%.so=%).so) \ 595 $(link-test-modules-rpath-link) \ 596 -L$(subst :, -L,$(rpath-link)) -Wl,-rpath-link=$(rpath-link) 597endef 598 599# This macro is similar to build-shlib but it does not define a soname 600# and it does not depend on the destination name to start with `lib'. 601# binutils only position loadable notes into the first page for binaries, 602# not for shared objects 603define build-module 604$(build-module-helper) -o $@ $(shlib-lds-flags) \ 605 $(csu-objpfx)abi-note.o $(build-module-objlist) $(link-libc-args) 606$(call after-link,$@) 607endef 608define build-module-asneeded 609$(build-module-helper) -o $@ $(shlib-lds-flags) \ 610 $(csu-objpfx)abi-note.o \ 611 -Wl,--as-needed $(build-module-objlist) -Wl,--no-as-needed \ 612 $(link-libc-args) 613$(call after-link,$@) 614endef 615 616# sofini.os must be placed last since it terminates .eh_frame section. 617build-module-helper-objlist = \ 618 $(patsubst %_pic.a,$(whole-archive) %_pic.a $(no-whole-archive),\ 619 $(filter-out %.lds $(map-file) $(+preinit) $(+postinit) \ 620 $(elf-objpfx)sofini.os \ 621 $(link-libc-deps),$^)) 622 623build-module-objlist = $(build-module-helper-objlist) $(LDLIBS-$(@F:%.so=%).so) 624build-shlib-objlist = $(build-module-helper-objlist) \ 625 $(LDLIBS-$(@F:lib%.so=%).so) \ 626 $(filter $(elf-objpfx)sofini.os,$^) 627 628# Don't try to use -lc when making libc.so itself. 629# Also omits crti.o and crtn.o, which we do not want 630# since we define our own `.init' section specially. 631LDFLAGS-c.so = -nostdlib -nostartfiles 632# But we still want to link libc.so against $(libc.so-gnulib). 633LDLIBS-c.so += $(libc.so-gnulib) 634# Give libc.so an entry point and make it directly runnable itself. 635LDFLAGS-c.so += -e __libc_main 636# Pre-link the objects of libc_pic.a for .gnu.glibc-stub.* processing. 637$(common-objpfx)libc_pic.os: $(common-objpfx)libc_pic.a 638 $(LINK.o) -nostdlib -nostartfiles -r -o $@ \ 639 $(LDFLAGS-c_pic.os) $(whole-archive) $^ -o $@ 640 641ifeq (,$(strip $(shlib-lds-flags))) 642# Generate a list of -R options to excise .gnu.glibc-stub.* sections. 643$(common-objpfx)libc_pic.opts: $(common-objpfx)libc_pic.os 644 $(OBJDUMP) -h $< | \ 645 $(AWK) '$$2 ~ /\.gnu\.glibc-stub\./ { print "-R", $$2 }' \ 646 > $@T 647 mv -f $@T $@ 648# Apply those -R options. 649$(common-objpfx)libc_pic.os.clean: $(common-objpfx)libc_pic.opts \ 650 $(common-objpfx)libc_pic.os 651 $(OBJCOPY) @$^ $@ 652generated += libc_pic.opts libc_pic.os.clean 653 654libc_pic_clean := .clean 655endif 656 657# Build a possibly-modified version of libc_pic.a for use in building 658# linkobj/libc.so. 659ifeq (,$(filter sunrpc,$(subdirs))) 660$(common-objpfx)linkobj/libc_pic.a: $(common-objpfx)libc_pic.a 661 $(make-target-directory) 662 ln -f $< $@ 663else 664$(common-objpfx)linkobj/libc_pic.a: $(common-objpfx)libc_pic.a \ 665 $(common-objpfx)sunrpc/librpc_compat_pic.a 666 $(make-target-directory) 667 (cd $(common-objpfx)linkobj; \ 668 $(AR) x ../libc_pic.a; \ 669 rm $$($(AR) t ../sunrpc/librpc_compat_pic.a | sed 's/^compat-//'); \ 670 $(AR) x ../sunrpc/librpc_compat_pic.a; \ 671 $(AR) cr libc_pic.a *.os; \ 672 rm *.os) 673endif # $(subdirs) contains sunrpc 674 675# Clear link-libc-deps for the libc.so libraries so build-shlibs does not 676# filter ld.so out of the list of linked objects. 677$(common-objpfx)libc.so: link-libc-deps = # empty 678$(common-objpfx)linkobj/libc.so: link-libc-deps = # empty 679 680# Use our own special initializer and finalizer files for the libc.so 681# libraries. 682$(common-objpfx)libc.so: $(common-objpfx)libc_pic.os$(libc_pic_clean) \ 683 $(elf-objpfx)sofini.os \ 684 $(elf-objpfx)interp.os \ 685 $(elf-objpfx)ld.so \ 686 $(shlib-lds) 687 $(build-shlib) 688 $(call after-link,$@) 689 690$(common-objpfx)linkobj/libc.so: $(common-objpfx)linkobj/libc_pic.a \ 691 $(elf-objpfx)sofini.os \ 692 $(elf-objpfx)interp.os \ 693 $(elf-objpfx)ld.so \ 694 $(shlib-lds) 695 $(build-shlib) 696 $(call after-link,$@) 697 698ifeq ($(build-shared),yes) 699$(common-objpfx)libc.so: $(common-objpfx)libc.map 700endif 701common-generated += libc.so libc_pic.os 702ifdef libc.so-version 703$(common-objpfx)libc.so$(libc.so-version): $(common-objpfx)libc.so 704 $(make-link) 705common-generated += libc.so$(libc.so-version) 706endif 707endif 708 709# Figure out the source filenames in this directory. 710 711override sources := $(addsuffix .c,\ 712 $(filter-out $(elided-routines),\ 713 $(routines) $(aux) \ 714 $(sysdep_routines))) 715sysdep_routines := $(sysdep_routines) 716 717headers := $(headers) $(sysdep_headers) 718 719# This is the list of all object files, gotten by 720# replacing every ".c" in `sources' with a ".o". 721override objects := $(addprefix $(objpfx),$(sources:.c=.o)) 722 723 724# The makefile may define $(extra-libs) with `libfoo libbar' 725# to build libfoo.a et al from the modules listed in $(libfoo-routines). 726ifdef extra-libs 727# extra-lib.mk is included once for each extra lib to define rules 728# to build it, and to add its objects to the various variables. 729# During its evaluation, $(lib) is set to the name of the library. 730extra-libs-left := $(extra-libs) 731include $(patsubst %,$(..)extra-lib.mk,$(extra-libs)) 732endif 733 734 735# The makefile may define $(modules-names) to build additional modules. 736# These are built with $(build-module), except any in $(modules-names-nobuild). 737# MODULE_NAME=extramodules, except any in $(modules-names-tests). 738ifdef modules-names 739cpp-srcs-left := $(filter-out $(modules-names-tests),$(modules-names)) 740ifneq (,$(cpp-srcs-left)) 741lib := extramodules 742include $(patsubst %,$(..)libof-iterator.mk,$(cpp-srcs-left)) 743endif 744 745ifdef modules-names-tests 746cpp-srcs-left := $(filter $(modules-names-tests),$(modules-names)) 747ifneq (,$(cpp-srcs-left)) 748lib := testsuite 749include $(patsubst %,$(..)libof-iterator.mk,$(cpp-srcs-left)) 750endif 751endif 752 753extra-modules-build := $(filter-out $(modules-names-nobuild),$(modules-names)) 754$(extra-modules-build:%=$(objpfx)%.so): $(objpfx)%.so: \ 755 $(objpfx)%.os $(shlib-lds) $(link-libs-deps) 756 $(build-module) 757endif 758 759+depfiles := $(sources:.c=.d) \ 760 $(patsubst %.o,%.d,$(filter %.o,$(extra-objs:.os=.o))) \ 761 $(patsubst %.oS,%.d,$(filter %.oS,$(extra-objs))) \ 762 $(patsubst %.o,%.d,$(filter %.o,$(extra-test-objs:.os=.o))) \ 763 $(addsuffix .d,$(tests) $(tests-internal) $(xtests) \ 764 $(tests-container) $(tests-printers) \ 765 $(test-srcs) $(tests-time64) $(xtests-time64)) 766ifeq ($(build-programs),yes) 767+depfiles += $(addsuffix .d,$(others) $(sysdep-others)) 768endif 769+depfiles := $(addprefix $(objpfx),\ 770 $(filter-out $(addsuffix .d,$(omit-deps)),\ 771 $(+depfiles))) 772all-dt-files := $(foreach o,$(object-suffixes-for-libc),$(+depfiles:.d=$o.dt)) 773+depfiles := $(patsubst %.dt,%.d,$(wildcard $(all-dt-files))) \ 774 $(wildcard $(all-dt-files:.dt=.d)) 775 776# This is a funny rule in that it removes its input file. 777%.d: %.dt 778 @sed $(sed-remove-objpfx) $< > $(@:.d=.T) && \ 779 mv -f $(@:.d=.T) $@ && \ 780 rm -f $< 781 782# Avoid the .h.d files for any .sym files whose .h files don't exist yet. 783# They will be generated when they're needed, and trying too early won't work. 784+gen-as-const := $(gen-as-const-headers:%.sym=$(common-objpfx)%.h) 785+depfiles += $(addsuffix .d,$(filter $(wildcard $(+gen-as-const)),\ 786 $(+gen-as-const))) 787 788ifdef +depfiles 789ifneq ($(no_deps),t) 790-include $(+depfiles) 791endif 792endif 793 794# Maximize efficiency by minimizing the number of rules. 795.SUFFIXES: # Clear the suffix list. We don't use suffix rules. 796# Don't define any builtin rules. 797MAKEFLAGS := $(MAKEFLAGS)r 798 799# Generic rule for making directories. 800%/: 801# mkdir isn't smart enough to strip a trailing /. 802# We always require a mkdir which supports the -p option to avoid error 803# messages in case of races. 804 mkdir -p $(@:%/=%) 805 806# Make sure that object files are not removed 807# when they are intermediates between sources and library members. 808.PRECIOUS: $(addprefix $(objpfx)%,$(all-object-suffixes)) 809 810# Make sure that the parent library archive is never removed. 811.PRECIOUS: $(foreach l,$(libtypes),$(patsubst %,$(common-objpfx)$l,c)) 812 813# Use the verbose option of ar and tar when not running silently. 814ifeq "$(findstring s,$(MAKEFLAGS))" "" # if not -s 815verbose := v 816else # -s 817verbose := 818endif # not -s 819 820ARFLAGS := r$(verbose) 821CREATE_ARFLAGS := cru$(verbose) 822 823# This makes all the object files in the parent library archive. 824 825.PHONY: lib lib-noranlib 826lib: lib-noranlib $(foreach l,$(libtypes),$(patsubst %,$(common-objpfx)$l,c)) 827lib-noranlib: libobjs 828 829# For object-suffix $o, the list of objects with that suffix. 830# Makefiles can define `elide-routines.so = foo' to leave foo.so out. 831o-objects = $(patsubst %.o,%$o,$(filter-out $(patsubst %,$(objpfx)%.o,\ 832 $(elide-routines$o)),\ 833 $(objects))) \ 834 $(addprefix $(objpfx),$(o-objects$o)) 835 836others: $(addprefix $(objpfx),$(install-lib)) 837 838ifndef objects 839 840# Create the stamp$o files to keep the parent makefile happy. 841subdir_lib: $(foreach o,$(object-suffixes-for-libc),$(objpfx)stamp$o) 842$(foreach o,$(object-suffixes-for-libc),$(objpfx)stamp$o): 843 $(make-target-directory) 844 rm -f $@; > $@ 845else 846 847# Define explicit rules to update each $(objpfx)stamp.SUFFIX 848# timestamp file; these rules (one explicit rule is generated for each 849# object suffix) write a list of objects to update in the stamp file. 850# The parent will then actually add them all to the archive in the 851# archive rule, below. 852define o-iterator-doit 853$(objpfx)stamp$o: $(o-objects); $$(do-stamp) 854endef 855define do-stamp 856$(make-target-directory) 857echo '$(patsubst $(objpfx)%,$(addsuffix /,$(subdir))%,$^)' > $@T 858mv -f $@T $@ 859endef 860object-suffixes-left := $(object-suffixes-for-libc) 861include $(o-iterator) 862 863endif 864 865# Now define explicit rules to build the library archives; these depend 866# on the stamp files built above. 867define o-iterator-doit 868$(common-objpfx)$(patsubst %,$(libtype$o),c): \ 869 $(subdirs-stamp-o) $(common-objpfx)stamp$o; $$(do-makelib) 870endef 871define do-makelib 872cd $(common-objdir) && \ 873$(AR) $(CREATE_ARFLAGS) $(@F) `cat $(patsubst $(common-objpfx)%,%,$^)` 874endef 875subdirs-stamps := $(foreach d,$(subdirs),$(common-objpfx)$d/stamp%) 876subdirs-stamp-o = $(subst %,$o,$(subdirs-stamps)) 877ifndef subdir 878$(subdirs-stamps): subdir_lib; 879endif 880object-suffixes-left = $(object-suffixes-for-libc) 881include $(o-iterator) 882 883 884# This makes all the object files. 885.PHONY: objects objs libobjs extra-objs 886objects objs: libobjs extra-objs 887libobjs: $(foreach o,$(object-suffixes-for-libc),$(objpfx)stamp$o) 888extra-objs: $(addprefix $(objpfx),$(extra-objs)) 889 890# Canned sequence for building an extra library archive. 891define build-extra-lib 892$(patsubst %/,cd % &&,$(objpfx)) \ 893$(AR) $(CREATE_ARFLAGS) $(@:$(objpfx)%=%) \ 894 $(patsubst $(objpfx)%,%,$^) 895endef 896 897# Installation. 898 899.PHONY: force-install 900force-install: 901 902# $(install-lib) are installed from the object directory into $(libdir); 903# files in $(install-lib) matching `lib%.a' are ranlib'd after installation 904# unless they also appear in $(non-lib.a). $(install-data) are installed as 905# they are into $(datadir). $(headers) are installed as they are in 906# $(includedir). $(install-bin), $(install-bin-script) and $(install-sbin) 907# are installed from the object directory into $(bindir), $(bindir) and 908# $(sbindir), respectively. $(install-others) and $(install-others-programs) 909# are absolute path names of files to install; rules to install them are 910# defined elsewhere. 911 912# The simple library name to install libc.a under. 913# This could be defined by a sysdep Makefile. 914ifndef libc-name 915libc-name := c 916endif 917 918define do-install 919$(make-target-directory) 920$(INSTALL_DATA) $< $@ 921endef 922 923# Make the target directory if it doesn't exist, using the `mkinstalldirs' 924# script that does `mkdir -p' even if `mkdir' doesn't support that flag. 925define make-target-directory 926$(addprefix $(..)./scripts/mkinstalldirs ,\ 927 $(filter-out $(wildcard $(@D:%/=%)),$(@D:%/=%))) 928endef 929 930# Any directory (parent or subdir) should install libc.a; this way 931# "make install" in a subdir is guaranteed to install everything it changes. 932installed-libcs := $(foreach o,$(filter-out .os,$(object-suffixes-for-libc)),\ 933 $(inst_libdir)/$(patsubst %,$(libtype$o),\ 934 $(libprefix)$(libc-name))) 935 936.PHONY: check-install-supported 937check-install-supported: 938 939# Check to see if the prefix or exec_prefix GNU standard variable 940# has been overridden on the command line and, if so, fail with 941# an error message since doing so is not supported (set DESTDIR 942# instead). 943ifeq ($(origin prefix),command line) 944check-install-supported: 945 $(error Overriding prefix is not supported. Set DESTDIR instead.) 946endif 947 948ifeq ($(origin exec_prefix),command line) 949check-install-supported: 950 $(error Overriding exec_prefix is not supported. Set DESTDIR instead.) 951endif 952 953install: check-install-supported 954 955install: $(installed-libcs) 956$(installed-libcs): $(inst_libdir)/lib$(libprefix)%: lib $(+force) 957 $(make-target-directory) 958 $(INSTALL_DATA) $(common-objpfx)lib$(*:$(libc-name)%=c%) $@ 959 960define do-install-program 961$(make-target-directory) 962$(INSTALL_PROGRAM) $< $@.new 963mv -f $@.new $@ 964endef 965 966define do-install-script 967$(make-target-directory) 968$(INSTALL_SCRIPT) $< $@.new 969mv -f $@.new $@ 970endef 971 972install-lib.so := $(filter %.so,$(install-lib:%_pic.a=%.so)) 973install-lib := $(filter-out %.so %_pic.a,$(install-lib)) 974 975ifeq (yes,$(build-shared)) 976# Find which .so's have a version number in their soname. 977versioned := $(strip $(foreach so,$(install-lib.so),\ 978 $(patsubst %,$(so),$($(so)-version)))) 979 980install-lib.so-versioned := $(filter $(versioned), $(install-lib.so)) 981install-lib.so-unversioned := $(filter-out $(versioned), $(install-lib.so)) 982 983# For libraries whose soname have version numbers, we install two files: 984# $(inst_libdir)/libfoo.so -- for linking, symlink or ld script 985# $(inst_slibdir)/libfoo.so.NN -- for loading by SONAME 986install-lib-nosubdir: $(install-lib.so-unversioned:%=$(inst_slibdir)/%) \ 987 $(foreach L,$(install-lib.so-versioned),\ 988 $(inst_libdir)/$L \ 989 $(inst_slibdir)/$L$($L-version)) 990 991# Install all the unversioned shared libraries. 992$(install-lib.so-unversioned:%=$(inst_slibdir)/%): $(inst_slibdir)/%.so: \ 993 $(objpfx)%.so $(+force) 994 $(do-install-program) 995 996ifneq ($(findstring -s,$(LN_S)),) 997define make-link 998rm -f $@.new 999$(SHELL) $(..)scripts/rellns-sh $< $@.new 1000mv -f $@.new $@ 1001endef 1002define make-link-multidir 1003$(patsubst %/,cd %,$(objpfx)); \ 1004 $(addprefix $(abspath $(..)scripts/mkinstalldirs) ,$(dir $(multidir))); \ 1005 $(LN_S) . $(multidir) 2> /dev/null; \ 1006 test -L $(multidir) 1007endef 1008else 1009# If we have no symbolic links don't bother with rellns-sh. 1010define make-link 1011rm -f $@.new 1012$(LN_S) $< $@.new 1013mv -f $@.new $@ 1014endef 1015define make-link-multidir 1016$(make-target-directory) 1017ln -f $(objpfx)/$(@F) $@ 1018endef 1019endif 1020 1021ifdef libc.so-version 1022$(inst_slibdir)/libc.so$(libc.so-version): $(common-objpfx)libc.so $(+force) 1023 $(do-install-program) 1024 1025install: $(inst_slibdir)/libc.so$(libc.so-version) 1026 1027# This fragment of linker script gives the OUTPUT_FORMAT statement 1028# for the configuration we are building. We put this statement into 1029# the linker scripts we install for -lc et al so that they will not be 1030# used by a link for a different format on a multi-architecture system. 1031$(common-objpfx)format.lds: $(common-objpfx)config.make \ 1032 $(common-objpfx)config.h $(..)Makerules 1033 $(LINK.o) -shared -nostdlib -nostartfiles \ 1034 -x assembler /dev/null -o $@.so 1035 $(OBJDUMP) -f $@.so | sed -n 's/.*file format \(.*\)/OUTPUT_FORMAT(\1)/;T;p' > $@ 1036 rm -f $@.so 1037common-generated += format.lds 1038 1039ifndef subdir 1040# What we install as libc.so for programs to link against is in fact a 1041# link script. It contains references for the various libraries we need. 1042# The libc.so object is not complete since some functions are only defined 1043# in libc_nonshared.a. 1044# We need to use absolute paths since otherwise local copies (if they exist) 1045# of the files are taken by the linker. 1046install: $(inst_libdir)/libc.so 1047$(inst_libdir)/libc.so: $(common-objpfx)format.lds \ 1048 $(common-objpfx)libc.so$(libc.so-version) \ 1049 $(inst_libdir)/$(patsubst %,$(libtype.oS),\ 1050 $(libprefix)$(libc-name)) \ 1051 $(+force) 1052 (echo '/* GNU ld script';\ 1053 echo ' Use the shared library, but some functions are only in';\ 1054 echo ' the static library, so try that secondarily. */';\ 1055 cat $<; \ 1056 echo 'GROUP ( $(slibdir)/libc.so$(libc.so-version)' \ 1057 '$(libdir)/$(patsubst %,$(libtype.oS),$(libprefix)$(libc-name))'\ 1058 ' AS_NEEDED (' $(rtlddir)/$(rtld-installed-name) ') )' \ 1059 ) > $@.new 1060 mv -f $@.new $@ 1061 1062endif 1063 1064else 1065install: $(inst_slibdir)/libc.so 1066$(inst_slibdir)/libc.so: $(common-objpfx)libc.so $(+force) 1067 $(do-install-program) 1068endif 1069 1070ifneq (,$(versioned)) 1071# Produce three sets of rules as above for all the smaller versioned libraries. 1072 1073define o-iterator-doit 1074$(inst_libdir)/$o: $(inst_slibdir)/$o$($o-version) $(+force); $$(make-link) 1075endef 1076object-suffixes-left := $(filter-out $(install-lib-ldscripts),$(versioned)) 1077ifneq (,$(object-suffixes-left)) 1078include $(o-iterator) 1079endif 1080 1081# Make symlinks in the build directory, because the versioned names might 1082# be referenced by a DT_NEEDED in another library. 1083define o-iterator-doit 1084$(objpfx)$o$($o-version): $(objpfx)$o; $$(make-link) 1085endef 1086object-suffixes-left := $(versioned) 1087include $(o-iterator) 1088 1089generated += $(foreach o,$(versioned),$o$($o-version)) 1090 1091define o-iterator-doit 1092$(inst_slibdir)/$o$($o-version): $(objpfx)$o $(+force); 1093 $$(do-install-program) 1094endef 1095object-suffixes-left := $(versioned) 1096include $(o-iterator) 1097endif # ifneq (,$(versioned)) 1098 1099define do-install-so 1100$(do-install-program) 1101$(patsubst %,$(LN_S) -f $(@F) \ 1102 $(@D)/$(patsubst %$*.so,%,$(<F))$(libprefix)$*.so,\ 1103 $(filter-out %.so,$@)) 1104endef 1105 1106so-versions := $(sort $(foreach so,$(install-lib.so),.so$($(so)-version))) 1107$(foreach v,$(so-versions),\ 1108 $(inst_slibdir)/lib$(libprefix)%$v): $(common-objpfx)lib%.so \ 1109 $(+force) 1110 $(do-install-so) 1111$(foreach v,$(so-versions),\ 1112 $(inst_slibdir)/$(libprefix)%$v): $(common-objpfx)%.so $(+force) 1113 $(do-install-so) 1114endif 1115 1116ifdef install-bin 1117$(addprefix $(inst_bindir)/,$(install-bin)): \ 1118 $(inst_bindir)/%: $(objpfx)% $(+force) 1119 $(do-install-program) 1120endif 1121ifdef install-bin-script 1122$(addprefix $(inst_bindir)/,$(install-bin-script)): \ 1123 $(inst_bindir)/%: $(objpfx)% $(+force) 1124 $(do-install-script) 1125endif 1126ifdef install-rootsbin 1127$(addprefix $(inst_rootsbindir)/,$(install-rootsbin)): \ 1128 $(inst_rootsbindir)/%: $(objpfx)% $(+force) 1129 $(do-install-program) 1130endif 1131ifdef install-sbin 1132$(addprefix $(inst_sbindir)/,$(install-sbin)): \ 1133 $(inst_sbindir)/%: $(objpfx)% $(+force) 1134 $(do-install-program) 1135endif 1136ifdef install-lib 1137install-lib.a := $(filter lib%.a,$(install-lib)) 1138install-lib.a := $(filter-out $(install-lib-ldscripts),$(install-lib.a)) 1139install-lib-non.a := $(filter-out lib%.a,$(install-lib)) 1140ifdef install-lib-non.a 1141$(addprefix $(inst_libdir)/$(libprefix),$(install-lib-non.a)): \ 1142 $(inst_libdir)/$(libprefix)%: $(objpfx)% $(+force) 1143 $(do-install) 1144endif 1145ifdef install-lib.a 1146$(install-lib.a:lib%.a=$(inst_libdir)/lib$(libprefix)%.a): \ 1147 $(inst_libdir)/lib$(libprefix)%.a: $(objpfx)lib%.a $(+force) 1148 $(do-install) 1149endif 1150endif 1151ifdef install-data 1152$(addprefix $(inst_datadir)/,$(install-data)): $(inst_datadir)/%: % $(+force) 1153 $(do-install) 1154endif 1155headers := $(strip $(headers)) 1156ifdef headers 1157# This implicit rule installs headers from the source directory. 1158# It may be ignored in preference to rules from sysd-rules to find 1159# headers in the sysdeps tree. 1160$(inst_includedir)/%.h: $(objpfx)%.h $(+force) 1161 $(do-install) 1162$(inst_includedir)/%.h: $(common-objpfx)%.h $(+force) 1163 $(do-install) 1164$(inst_includedir)/%.h: %.h $(+force) 1165 $(do-install) 1166$(inst_includedir)/%.h: $(..)include/%.h $(+force) 1167 $(do-install) 1168headers-nonh := $(filter-out %.h,$(headers)) 1169ifdef headers-nonh 1170$(addprefix $(inst_includedir)/,$(headers-nonh)): $(inst_includedir)/%: \ 1171 % $(+force) 1172 $(do-install) 1173endif # headers-nonh 1174endif # headers 1175 1176.PHONY: install-bin-nosubdir install-bin-script-nosubdir \ 1177 install-rootsbin-nosubdir install-sbin-nosubdir install-lib-nosubdir \ 1178 install-data-nosubdir install-headers-nosubdir 1179install-bin-nosubdir: $(addprefix $(inst_bindir)/,$(install-bin)) 1180install-bin-script-nosubdir: $(addprefix $(inst_bindir)/,$(install-bin-script)) 1181install-rootsbin-nosubdir: \ 1182 $(addprefix $(inst_rootsbindir)/,$(install-rootsbin)) 1183install-sbin-nosubdir: $(addprefix $(inst_sbindir)/,$(install-sbin)) 1184install-lib-nosubdir: $(addprefix $(inst_libdir)/,\ 1185 $(patsubst lib%.a,lib$(libprefix)%.a,$(install-lib.a)) \ 1186 $(addprefix $(libprefix),$(install-lib-non.a))) 1187install-data-nosubdir: $(addprefix $(inst_datadir)/,$(install-data)) 1188install-headers-nosubdir: $(addprefix $(inst_includedir)/,$(headers)) 1189install-others-nosubdir: $(install-others) 1190install-others-programs-nosubdir: $(install-others-programs) 1191 1192# We need all the `-nosubdir' targets so that `install' in the parent 1193# doesn't depend on several things which each iterate over the subdirs. 1194# This rule makes `install-FOO' always use `install-FOO-nosubdir' as a 1195# subroutine. Then in the parent `install-FOO' also causes subdir makes. 1196install-%:: install-%-nosubdir ; 1197 1198.PHONY: install install-no-libc.a-nosubdir 1199install-no-libc.a-nosubdir: install-headers-nosubdir install-data-nosubdir \ 1200 install-lib-nosubdir install-others-nosubdir 1201ifeq ($(build-programs),yes) 1202install-no-libc.a-nosubdir: install-bin-nosubdir install-bin-script-nosubdir \ 1203 install-rootsbin-nosubdir install-sbin-nosubdir \ 1204 install-others-programs-nosubdir 1205endif 1206install: install-no-libc.a-nosubdir 1207 1208# Command to compile $< using the native libraries. 1209define native-compile 1210$(make-target-directory) 1211$(BUILD_CC) $($(basename $(<F))-CFLAGS) $(ALL_BUILD_CFLAGS) \ 1212 $< $(OUTPUT_OPTION) $(BUILD_LDFLAGS) 1213endef 1214 1215# We always want to use configuration definitions. 1216ALL_BUILD_CFLAGS = $(BUILD_CFLAGS) $(BUILD_CPPFLAGS) -D_GNU_SOURCE \ 1217 -DIS_IN_build -include $(common-objpfx)config.h 1218 1219# Support the GNU standard name for this target. 1220.PHONY: check 1221check: tests 1222# Special target to run tests which cannot be run unconditionally. 1223# Maintainers should use this target. 1224.PHONY: xcheck 1225xcheck: xtests 1226 1227# Handle tests-time64 and xtests-time64 that should built with LFS 1228# and 64-bit time support. 1229include $(o-iterator) 1230define o-iterator-doit 1231$(foreach f,$(tests-time64) $(xtests-time64),\ 1232 $(objpfx)$(f)$(o)): CFLAGS += -D_TIME_BITS=64 -D_FILE_OFFSET_BITS=64 1233endef 1234object-suffixes-left := $(all-object-suffixes) 1235include $(o-iterator) 1236 1237ifeq ($(have-time64-compat),yes) 1238tests += $(foreach t,$(tests-time64),$(t)) 1239xtests += $(foreach t,$(xtests-time64),$(t)) 1240endif 1241 1242# The only difference between MODULE_NAME=testsuite and MODULE_NAME=nonlib is 1243# that almost all internal declarations from config.h, libc-symbols.h, and 1244# include/*.h are not available to 'testsuite' code, but are to 'nonlib' code. 1245all-testsuite := $(strip $(tests) $(xtests) $(test-srcs) $(test-extras) \ 1246 $(tests-container)) 1247ifneq (,$(all-testsuite)) 1248cpp-srcs-left = $(all-testsuite) 1249lib := testsuite 1250include $(patsubst %,$(..)libof-iterator.mk,$(cpp-srcs-left)) 1251endif 1252 1253all-nonlib := $(strip $(others) $(others-extras)) 1254ifneq (,$(all-nonlib)) 1255cpp-srcs-left = $(all-nonlib) 1256lib := nonlib 1257include $(patsubst %,$(..)libof-iterator.mk,$(cpp-srcs-left)) 1258endif 1259 1260# All internal tests use testsuite-internal module since for 64 bit time 1261# support is set as default for MODULE_NAME=nonlib (which include some 1262# installed programs). 1263all-testsuite-internal := $(strip $(tests-internal) $(test-internal-extras)) 1264ifneq (,$(all-testsuite-internal)) 1265cpp-srcs-left = $(all-testsuite-internal) 1266lib := testsuite-internal 1267include $(patsubst %,$(..)libof-iterator.mk,$(cpp-srcs-left)) 1268endif 1269 1270ifeq ($(build-shared),yes) 1271# Generate normalized lists of symbols, versions, and data sizes. 1272# This is handy for checking against existing library binaries. 1273 1274%.symlist: $(..)scripts/abilist.awk %.dynsym 1275 LC_ALL=C $(AWK) -f $^ > $@T 1276 mv -f $@T $@ 1277 1278%.dynsym: %.so 1279 LC_ALL=C $(OBJDUMP) --dynamic-syms $< > $@T 1280 mv -f $@T $@ 1281 1282vpath %.abilist $(+sysdep_dirs) 1283 1284# The .PRECIOUS rule prevents the files built by an implicit rule whose 1285# target pattern is %.symlist from being considered "intermediate files" 1286# and automatically removed. We only want these files to be removed by 1287# 'make clean', which is handled by the 'generated' variable. 1288.PRECIOUS: %.symlist 1289generated += $(extra-libs:=.symlist) 1290 1291$(objpfx)check-abi-%.out: $(common-objpfx)config.make %.abilist \ 1292 $(objpfx)%.symlist 1293 $(check-abi); \ 1294 $(evaluate-test) 1295$(objpfx)check-abi-%.out: $(common-objpfx)config.make %.abilist \ 1296 $(common-objpfx)%.symlist 1297 $(check-abi); \ 1298 $(evaluate-test) 1299define check-abi 1300 diff -p -U 0 $(filter %.abilist,$^) $(filter %.symlist,$^) > $@ 1301endef 1302 1303update-abi-%: $(objpfx)%.symlist %.abilist 1304 $(update-abi) 1305update-abi-%: $(common-objpfx)%.symlist %.abilist 1306 $(update-abi) 1307define update-abi 1308@if cmp -s $^ 2> /dev/null; \ 1309 then \ 1310 echo '+++ $(filter %.abilist,$^) is unchanged'; \ 1311 else cp -f $^; \ 1312 echo '*** Now check $(filter %.abilist,$^) changes for correctness ***'; \ 1313 fi 1314endef 1315 1316# Patch all .abilist files for one DSO. The find command locates abilist 1317# files for all architectures. The abilist files in /generic/ are 1318# filtered out because these are expected to remain empty. 1319define update-all-abi 1320$(SHELL) $(..)scripts/update-abilist.sh $^ \ 1321 $$(find $(..)sysdeps -name '$*.abilist' \! -path '*/generic/*') 1322endef 1323update-all-abi-%: %.abilist $(objpfx)%.symlist 1324 $(update-all-abi) 1325update-all-abi-%: %.abilist $(common-objpfx)%.symlist 1326 $(update-all-abi) 1327 1328.PHONY: update-abi update-all-abi check-abi 1329update-abi: $(patsubst %.so,update-abi-%,$(install-lib.so-versioned)) 1330update-all-abi: $(patsubst %.so,update-all-abi-%,$(install-lib.so-versioned)) 1331check-abi-list = $(patsubst %.so,$(objpfx)check-abi-%.out, \ 1332 $(install-lib.so-versioned)) 1333check-abi: $(check-abi-list) 1334ifdef subdir 1335subdir_check-abi: check-abi 1336subdir_update-abi: update-abi 1337subdir_update-all-abi: update-all-abi 1338else 1339check-abi: subdir_check-abi 1340 if grep -q '^FAIL:' $(objpfx)*/check-abi*.test-result; then \ 1341 cat $(objpfx)*/check-abi*.out && exit 1; fi 1342update-abi: subdir_update-abi 1343update-all-abi: subdir_update-all-abi 1344endif 1345 1346ifeq ($(subdir),elf) 1347check-abi: $(objpfx)check-abi-libc.out 1348tests-special += $(objpfx)check-abi-libc.out 1349update-abi: update-abi-libc 1350update-all-abi: update-all-abi-libc 1351common-generated += libc.symlist 1352endif 1353 1354ifeq ($(build-shared),yes) 1355ifdef subdir 1356tests-special += $(check-abi-list) 1357endif 1358endif 1359 1360endif 1361 1362# These will have been set by sysdeps/posix/Makefile. 1363L_tmpnam ?= 1 1364TMP_MAX ?= 0 1365L_ctermid ?= 1 1366L_cuserid ?= 1 1367 1368stdio_lim = $(common-objpfx)bits/stdio_lim.h 1369 1370$(stdio_lim:lim.h=%.h) $(stdio_lim:lim.h=%.d): $(stdio_lim:lim.h=%.st); @: 1371$(stdio_lim:h=st): $(..)stdio-common/stdio_lim.h.in $(..)Rules \ 1372 $(common-objpfx)config.make 1373 $(make-target-directory) 1374 { echo '#include "$(..)posix/bits/posix1_lim.h"'; \ 1375 } | \ 1376 $(CC) -E -dM -MD -MP -MF $(@:st=dT) -MT '$(@:st=h) $(@:st=d)' \ 1377 $(CPPUNDEFS) $(+includes) -xc - -o $(@:st=hT) 1378 sed $(sed-remove-objpfx) $(sed-remove-dotdot) \ 1379 $(@:st=dT) > $(@:st=dt) 1380 mv -f $(@:st=dt) $(@:st=d) 1381 fopen_max=`sed -n 's/^#define OPEN_MAX //1p' $(@:st=hT)`; \ 1382 filename_max=`sed -n 's/^#define PATH_MAX //1p' $(@:st=hT)`; \ 1383 fopen_max=$${fopen_max:-16}; \ 1384 filename_max=$${filename_max:-1024}; \ 1385 sed -e "s/@FOPEN_MAX@/$$fopen_max/" \ 1386 -e "s/@FILENAME_MAX@/$$filename_max/" \ 1387 -e "s/@L_tmpnam@/$(L_tmpnam)/" \ 1388 -e "s/@TMP_MAX@/$(TMP_MAX)/" \ 1389 -e "s/@L_ctermid@/$(L_ctermid)/" \ 1390 -e "s/@L_cuserid@/$(L_cuserid)/" \ 1391 $< > $(@:st=h.new) 1392 $(move-if-change) $(@:st=h.new) $(@:st=h) 1393# Remove these last so that they can be examined if something went wrong. 1394 rm -f $(@:st=hT) $(@:st=dT) $(@:st=dt) 1395 touch $@ 1396# Get dependencies. 1397ifndef no_deps 1398-include $(stdio_lim:h=d) 1399endif 1400common-generated += bits/stdio_lim.h bits/stdio_lim.d bits/stdio_lim.st 1401 1402FORCE: 1403 1404.PHONY: echo-headers 1405echo-headers: 1406 @echo $(headers) 1407 1408%.bz2: %; bzip2 -9vk $< 1409%.gz: %; gzip -9vnc $< > $@.new && mv -f $@.new $@ 1410%.xz: %; xz -9evk $< 1411 1412# Common cleaning targets. 1413 1414.PHONY: common-mostlyclean common-clean mostlyclean clean do-tests-clean 1415clean: common-clean 1416mostlyclean: common-mostlyclean 1417 1418do-tests-clean: 1419 -rm -f $(addprefix $(objpfx),$(addsuffix .out,$(tests) \ 1420 $(tests-internal) \ 1421 $(xtests) \ 1422 $(test-srcs)) \ 1423 $(addsuffix .test-result,$(tests) \ 1424 $(tests-internal) \ 1425 $(xtests) \ 1426 $(test-srcs))) 1427 1428# Remove the object files. 1429common-mostlyclean: 1430 -rm -f $(addprefix $(objpfx),$(tests) $(tests-internal) $(xtests) \ 1431 $(test-srcs) \ 1432 $(others) $(sysdep-others) stubs \ 1433 $(addsuffix .o,$(tests) \ 1434 $(tests-internal) \ 1435 $(xtests) \ 1436 $(test-srcs) \ 1437 $(others) \ 1438 $(sysdep-others)) \ 1439 $(addsuffix .out,$(tests) \ 1440 $(tests-internal) \ 1441 $(xtests) \ 1442 $(test-srcs)) \ 1443 $(addsuffix .test-result,$(tests) \ 1444 $(tests-internal) \ 1445 $(xtests) \ 1446 $(test-srcs))) 1447 -rm -f $(addprefix $(objpfx),$(extra-objs) $(extra-test-objs) \ 1448 $(install-lib) $(install-lib.so) \ 1449 $(install-lib.so:%.so=%_pic.a)) 1450 -rm -f core 1451 -rm -f $(objpfx)rtld-*.os 1452 $(rmobjs) 1453define rmobjs 1454$(foreach o,$(object-suffixes-for-libc), 1455-rm -f $(objpfx)stamp$o $(o-objects)) 1456endef 1457 1458# Also remove the dependencies and generated source files. 1459common-clean: common-mostlyclean 1460 -rm -f $(addprefix $(objpfx),$(generated)) 1461 -rm -f $(objpfx)*.d $(objpfx)*.dt 1462 -rm -fr $(addprefix $(objpfx),$(generated-dirs)) 1463 -rm -f $(addprefix $(common-objpfx),$(common-generated)) 1464 -rm -f $(gen-as-const-headers:%.sym=$(common-objpfx)%.h) 1465 1466# Produce a file `stubs' which contains `#define __stub_FUNCTION' 1467# for each function which is a stub. 1468 1469ifdef objpfx 1470.PHONY: stubs # The parent Makefile calls this target. 1471stubs: $(objpfx)stubs 1472endif 1473objs-for-stubs := $(foreach o,$(object-suffixes-for-libc),$(o-objects)) \ 1474 $(addprefix $(objpfx),$(extra-objs)) 1475$(objpfx)stubs: $(objs-for-stubs) 1476ifneq (,$(strip $(objs-for-stubs))) 1477 (cd $(objpfx).; $(OBJDUMP) -h $(patsubst $(objpfx)%,%,$^)) | \ 1478 $(AWK) '/\.gnu\.glibc-stub\./ { \ 1479 sub(/\.gnu\.glibc-stub\./, "", $$2); \ 1480 stubs[$$2] = 1; } \ 1481 END { for (s in stubs) print "#define __stub_" s }' > $@T 1482 mv -f $@T $@ 1483else 1484 > $@ 1485endif 1486 1487ifneq (,$(strip $(gpl2lgpl))) 1488ifneq (,$(wildcard $(..)gpl2lgpl.sed)) 1489# Snarf from the master source and frob the copying notice. 1490$(gpl2lgpl): %: $(..)gpl2lgpl.sed /home/gd/gnu/lib/% 1491 sed -f $^ > $@-tmp 1492# So I don't edit them by mistake. 1493 chmod a-w $@-tmp 1494 mv -f $@-tmp $@ 1495endif 1496endif 1497 1498# Local Variables: 1499# mode: makefile 1500# End: 1501