1# Copyright (C) 1991-2022 Free Software Foundation, Inc. 2# Copyright The GNU Toolchain Authors. 3# This file is part of the GNU C Library. 4 5# The GNU C Library is free software; you can redistribute it and/or 6# modify it under the terms of the GNU Lesser General Public 7# License as published by the Free Software Foundation; either 8# version 2.1 of the License, or (at your option) any later version. 9 10# The GNU C Library is distributed in the hope that it will be useful, 11# but WITHOUT ANY WARRANTY; without even the implied warranty of 12# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 13# Lesser General Public License for more details. 14 15# You should have received a copy of the GNU Lesser General Public 16# License along with the GNU C Library; if not, see 17# <https://www.gnu.org/licenses/>. 18 19# 20# Makefile configuration options for the GNU C library. 21# 22ifneq (,) 23This makefile requires GNU Make. 24endif 25 26all: # Make this the default goal 27 28ifneq "$(origin +included-Makeconfig)" "file" 29 30+included-Makeconfig := yes 31 32ifdef subdir 33.. := ../ 34endif 35 36# $(common-objdir) is the place to put objects and 37# such that are not specific to a single subdir. 38ifdef objdir 39objpfx := $(patsubst %//,%/,$(objdir)/$(subdir)/) 40common-objpfx = $(objdir)/ 41common-objdir = $(objdir) 42else 43$(error objdir must be defined by the build-directory Makefile) 44endif 45 46# Root of the sysdeps tree. 47sysdep_dir := $(..)sysdeps 48export sysdep_dir := $(sysdep_dir) 49 50# Get the values defined by options to `configure'. 51include $(common-objpfx)config.make 52 53# What flags to give to sources which call user provided callbacks 54uses-callbacks = -fexceptions 55 56# What flags to give to tests which test stack alignment 57stack-align-test-flags = 58 59# Complete path to sysdep dirs. 60# `configure' writes a definition of `config-sysdirs' in `config.make'. 61sysdirs := $(foreach D,$(config-sysdirs),$(firstword $(filter /%,$D) $(..)$D)) 62 63+sysdep_dirs = $(sysdirs) 64ifdef objdir 65+sysdep_dirs := $(objdir) $(+sysdep_dirs) 66endif 67 68# Run config.status to update config.make and config.h. We don't show the 69# dependence of config.h to Make, because it is only touched when it 70# changes and so config.status would be run every time; the dependence of 71# config.make should suffice to force regeneration and re-exec, and the new 72# image will notice if config.h changed. 73$(common-objpfx)config.make: $(common-objpfx)config.status \ 74 $(..)config.make.in $(..)config.h.in 75 cd $(<D); $(SHELL) $(<F) 76 77# Find all the sysdeps configure fragments, to make sure we re-run 78# configure when any of them changes. 79$(common-objpfx)config.status: $(..)version.h $(..)configure \ 80 $(foreach dir,$(sysdirs),\ 81 $(wildcard $(dir)/Implies) \ 82 $(patsubst %.ac,%,\ 83 $(firstword $(wildcard \ 84 $(addprefix $(dir)/,configure configure.ac))))) \ 85 $(patsubst %.ac,%,\ 86 $(wildcard $(..)sysdeps/*/preconfigure $(..)sysdeps/*/preconfigure.ac)) 87 @cd $(@D); if test -f $(@F); then exec $(SHELL) $(@F) --recheck; else \ 88 echo The GNU C library has not been configured. >&2; \ 89 echo Run \`configure\' to configure it before building. >&2; \ 90 echo Try \`configure --help\' for more details. >&2; \ 91 exit 1; fi 92 93# We don't want CPPFLAGS to be exported to the command running configure. 94unexport CPPFLAGS 95 96# Get the user's configuration parameters. 97ifneq ($(wildcard $(..)configparms),) 98include $(..)configparms 99endif 100ifneq ($(objpfx),) 101ifneq ($(wildcard $(common-objpfx)configparms),) 102include $(common-objpfx)configparms 103endif 104endif 105 106#### 107#### These are the configuration variables. You can define values for 108#### the variables below in the file `configparms'. 109#### Do NOT edit this file. 110#### 111 112 113# Common prefix for machine-independent installation directories. 114ifeq ($(origin prefix),undefined) # ifndef would override explicit empty value. 115prefix = /usr/local 116endif 117 118# Decide whether we shall build the programs or not. We always do this 119# unless the user tells us (in configparms) or we are building for a 120# standalone target. 121ifndef build-programs 122ifneq ($(config-os),none) 123build-programs=yes 124else 125build-programs=no 126endif 127endif 128 129# Common prefix for machine-dependent installation directories. 130ifeq ($(origin exec_prefix),undefined) 131exec_prefix = $(prefix) 132endif 133 134# Where to install the library and object files. 135ifndef libdir 136libdir = $(exec_prefix)/lib 137endif 138inst_libdir = $(install_root)$(libdir) 139 140# Where to install the shared library. 141ifndef slibdir 142slibdir = $(exec_prefix)/lib 143endif 144inst_slibdir = $(install_root)$(slibdir) 145 146# Where to install the dynamic linker. 147ifndef rtlddir 148rtlddir = $(slibdir) 149endif 150inst_rtlddir = $(install_root)$(rtlddir) 151 152# Prefix to put on files installed in $(libdir). For libraries `libNAME.a', 153# the prefix is spliced between `lib' and the name, so the linker switch 154# `-l$(libprefix)NAME' finds the library; for other files the prefix is 155# just prepended to the whole file name. 156ifeq ($(origin libprefix),undefined) 157libprefix = 158endif 159 160# Where to install the header files. 161ifndef includedir 162includedir = $(prefix)/include 163endif 164inst_includedir = $(install_root)$(includedir) 165 166# Where to install machine-independent data files. 167# These are the timezone database, and the locale database. 168ifndef datadir 169datadir = $(prefix)/share 170endif 171inst_datadir = $(install_root)$(datadir) 172 173# Where to install the timezone data files (which are machine-independent). 174ifndef zonedir 175zonedir = $(datadir)/zoneinfo 176endif 177inst_zonedir = $(install_root)$(zonedir) 178 179# Where to install the compiled binary locale archive and compiled 180# binary locale files. 181ifndef complocaledir 182complocaledir = $(libdir)/locale 183endif 184inst_complocaledir = $(install_root)$(complocaledir) 185 186# Where to install the message catalog data files (which are 187# machine-independent). 188ifndef localedir 189localedir = $(datadir)/locale 190endif 191inst_localedir = $(install_root)$(localedir) 192 193# Where to install the locale charmap source files. 194ifndef i18ndir 195i18ndir = $(datadir)/i18n 196endif 197inst_i18ndir = $(install_root)$(i18ndir) 198 199# Where to install the shared object for charset transformation. 200ifndef gconvdir 201gconvdir = $(libdir)/gconv 202endif 203inst_gconvdir = $(install_root)$(gconvdir) 204 205# Where to install programs. 206ifndef bindir 207bindir = $(exec_prefix)/bin 208endif 209inst_bindir = $(install_root)$(bindir) 210 211# Where to install internal programs. 212ifndef libexecdir 213libexecdir = $(exec_prefix)/libexec 214endif 215inst_libexecdir = $(install_root)$(libexecdir) 216 217# Where to install administrative programs. 218ifndef rootsbindir 219rootsbindir = $(exec_prefix)/sbin 220endif 221inst_rootsbindir = $(install_root)$(rootsbindir) 222 223ifndef sbindir 224sbindir = $(exec_prefix)/sbin 225endif 226inst_sbindir = $(install_root)$(sbindir) 227 228# Where to install the Info files. 229ifndef infodir 230infodir = $(prefix)/info 231endif 232inst_infodir = $(install_root)$(infodir) 233 234# Where to install audit libraries. 235ifndef auditdir 236auditdir = $(libdir)/audit 237endif 238inst_auditdir = $(install_root)$(auditdir) 239 240# Where to install default configuration files. These include the local 241# timezone specification and network data base files. 242ifndef sysconfdir 243sysconfdir = $(prefix)/etc 244endif 245inst_sysconfdir = $(install_root)$(sysconfdir) 246 247# Directory for the database files and Makefile for nss_db. 248ifndef vardbdir 249vardbdir = $(localstatedir)/db 250endif 251inst_vardbdir = $(install_root)$(vardbdir) 252 253# Where to install the "localtime" timezone file; this is the file whose 254# contents $(localtime) specifies. If this is a relative pathname, it is 255# relative to $(zonedir). It is a good idea to put this somewhere 256# other than there, so the zoneinfo directory contains only universal data, 257# localizing the configuration data elsewhere. 258ifndef localtime-file 259localtime-file = $(sysconfdir)/localtime 260endif 261 262# What to use for leap second specifications in compiling the default 263# timezone files. Set this to `/dev/null' for no leap second handling as 264# 1003.1 requires, or to `leapseconds' for proper leap second handling. 265# Both zone flavors are always available as `posix/ZONE' and `right/ZONE'. 266# This variable determines the default: if it's `/dev/null', 267# ZONE==posix/ZONE; if it's `leapseconds', ZONE==right/ZONE. 268ifndef leapseconds 269leapseconds = /dev/null 270endif 271 272# What timezone's DST rules should be used when a POSIX-style TZ 273# environment variable doesn't specify any rules. For 1003.1 compliance 274# this timezone must use rules that are as U.S. federal law defines DST. 275# Run `make -C time echo-zonenames' to see a list of available zone names. 276# This setting can be changed with `zic -p TIMEZONE' at any time. 277# If you want POSIX.1 compatibility, use `America/New_York'. 278ifndef posixrules 279posixrules = America/New_York 280endif 281 282# Where to install the "posixrules" timezone file; this is file 283# whose contents $(posixrules) specifies. If this is a relative 284# pathname, it is relative to $(zonedir). 285ifndef posixrules-file 286posixrules-file = posixrules 287endif 288 289 290# Directory where your system's native header files live. 291# This is used on Unix systems to generate some GNU libc header files. 292ifndef sysincludedir 293sysincludedir = /usr/include 294endif 295 296 297# Commands to install files. 298ifndef INSTALL_DATA 299INSTALL_DATA = $(INSTALL) -m 644 300endif 301ifndef INSTALL_SCRIPT 302INSTALL_SCRIPT = $(INSTALL) 303endif 304ifndef INSTALL_PROGRAM 305INSTALL_PROGRAM = $(INSTALL) 306endif 307ifndef INSTALL 308INSTALL = install 309endif 310 311 312# The name of the C compiler. 313# If you've got GCC, and it works, use it. 314ifeq ($(origin CC),default) 315CC := gcc 316endif 317 318# The name of the C compiler to use for compilations of programs to run on 319# the host that is building the library. If you set CC to a 320# cross-compiler, you must set this to the normal compiler. 321ifndef BUILD_CC 322BUILD_CC = $(CC) 323endif 324 325# Default flags to pass the C compiler. 326ifndef default_cflags 327ifeq ($(release),stable) 328default_cflags := -g -O2 329else 330default_cflags := -g -O 331endif 332endif 333 334# Flags to pass the C compiler when assembling preprocessed assembly code 335# (`.S' files). 336ifndef asm-CPPFLAGS 337asm-CPPFLAGS = 338endif 339 340# Must be supported by the linker. 341no-whole-archive = -Wl,--no-whole-archive 342whole-archive = -Wl,--whole-archive 343 344# Installed name of the startup code. 345# The ELF convention is that the startfile is called crt1.o 346start-installed-name = crt1.o 347# On systems that do not need a special startfile for statically linked 348# binaries, simply set it to the normal name. 349ifndef static-start-installed-name 350static-start-installed-name = $(start-installed-name) 351endif 352 353ifeq (yes,$(enable-static-pie)) 354# Link with rcrt1.o, instead of crt1.o, to call _dl_relocate_static_pie 355# to relocate static PIE. 356real-static-start-installed-name = r$(static-start-installed-name) 357else 358real-static-start-installed-name = $(static-start-installed-name) 359endif 360 361relro-LDFLAGS = -Wl,-z,relro 362LDFLAGS.so += $(relro-LDFLAGS) 363LDFLAGS-rtld += $(relro-LDFLAGS) 364 365# Linker options to enable and disable DT_RELR. 366ifeq ($(have-dt-relr),yes) 367dt-relr-ldflag = -Wl,-z,pack-relative-relocs 368no-dt-relr-ldflag = -Wl,-z,nopack-relative-relocs 369else 370dt-relr-ldflag = 371no-dt-relr-ldflag = 372endif 373 374ifeq (no,$(build-pie-default)) 375pie-default = $(no-pie-ccflag) 376else # build-pie-default 377pic-default = -DPIC 378# Compile libc.a and libc_p.a with -fPIE/-fpie for static PIE. 379pie-default = $(pie-ccflag) 380 381ifeq (yes,$(enable-static-pie)) 382static-pie-dt-relr-ldflag = $(dt-relr-ldflag) 383ifeq (yes,$(have-static-pie)) 384static-pie-ldflag = -static-pie 385else 386# Static PIE can't have dynamic relocations in read-only segments since 387# static PIE is mapped into memory by kernel. --eh-frame-hdr is needed 388# for PIE to support exception. 389static-pie-ldflag = -Wl,-pie,--no-dynamic-linker,--eh-frame-hdr,-z,text 390endif # have-static-pie 391endif # enable-static-pie 392endif # build-pie-default 393 394# If lazy relocations are disabled, add the -z now flag. Use 395# LDFLAGS-lib.so instead of LDFLAGS.so, to avoid adding the flag to 396# test modules. 397ifeq ($(bind-now),yes) 398LDFLAGS-lib.so += -Wl,-z,now 399# Extra flags for dynamically linked non-test main programs. 400link-extra-flags += -Wl,-z,now 401endif 402 403# Command to run after every final link (executable or shared object). 404# This is invoked with $(call after-link,...), so it should operate on 405# the file $1. This can be set to do some sort of post-processing on 406# binaries, or to perform some sort of static sanity check. 407ifndef after-link 408after-link = 409endif 410 411# Additional libraries to link into every test. 412link-extra-libs-tests = $(libsupport) 413 414# Command for linking PIE programs with the C library. 415ifndef +link-pie 416+link-pie-before-inputs = $(if $($(@F)-no-pie),$(no-pie-ldflag),-pie) \ 417 $(if $($(@F)-no-dt-relr),$(no-dt-relr-ldflag),$(dt-relr-ldflag)) \ 418 -Wl,-O1 -nostdlib -nostartfiles \ 419 $(sysdep-LDFLAGS) $(LDFLAGS) $(LDFLAGS-$(@F)) \ 420 $(relro-LDFLAGS) $(hashstyle-LDFLAGS) \ 421 $(firstword $(CRT-$(@F)) $(csu-objpfx)S$(start-installed-name)) \ 422 $(+preinit) $(+prectorS) 423+link-pie-before-libc = -o $@ $(+link-pie-before-inputs) \ 424 $(filter-out $(addprefix $(csu-objpfx),start.o \ 425 S$(start-installed-name))\ 426 $(+preinit) $(link-extra-libs) \ 427 $(common-objpfx)libc% $(+postinit),$^) \ 428 $(link-extra-libs) 429+link-pie-after-libc = $(+postctorS) $(+postinit) 430define +link-pie 431$(CC) $(link-libc-rpath-link) $(+link-pie-before-libc) $(rtld-LDFLAGS) \ 432 $(link-extra-flags) $(link-libc) $(+link-pie-after-libc) 433$(call after-link,$@) 434endef 435define +link-pie-tests 436$(CC) $(+link-pie-before-libc) $(rtld-tests-LDFLAGS) $(link-libc-tests) \ 437 $(+link-pie-after-libc) 438$(call after-link,$@) 439endef 440define +link-pie-printers-tests 441$(CC) $(+link-pie-before-libc) $(built-rtld-LDFLAGS) \ 442 $(link-libc-printers-tests) $(+link-pie-after-libc) 443$(call after-link,$@) 444endef 445endif 446# Command for statically linking programs with the C library. 447ifndef +link-static 448+link-static-before-inputs = -nostdlib -nostartfiles -static \ 449 $(if $($(@F)-no-pie),$(no-pie-ldflag),$(static-pie-ldflag)) \ 450 $(if $($(@F)-no-dt-relr),$(no-dt-relr-ldflag),$(static-pie-dt-relr-ldflag)) \ 451 $(sysdep-LDFLAGS) $(LDFLAGS) $(LDFLAGS-$(@F)) \ 452 $(firstword $(CRT-$(@F)) $(csu-objpfx)$(real-static-start-installed-name)) \ 453 $(+preinit) $(+prectorT) 454+link-static-before-libc = -o $@ $(+link-static-before-inputs) \ 455 $(filter-out $(addprefix $(csu-objpfx),start.o \ 456 $(start-installed-name))\ 457 $(+preinit) $(link-extra-libs-static) \ 458 $(common-objpfx)libc% $(+postinit),$^) \ 459 $(link-extra-libs-static) 460+link-static-after-libc = $(+postctorT) $(+postinit) 461define +link-static 462$(CC) $(+link-static-before-libc) $(link-extra-flags) $(link-libc-static) \ 463 $(+link-static-after-libc) 464$(call after-link,$@) 465endef 466define +link-static-tests 467$(CC) $(+link-static-before-libc) $(link-libc-static-tests) \ 468 $(+link-static-after-libc) 469$(call after-link,$@) 470endef 471endif 472# Commands for linking programs with the C library. 473ifndef +link 474ifeq (yes,$(build-shared)) 475ifeq (yes,$(cc-pie-default)) 476no-pie-ldflag = -no-pie 477endif 478ifeq (yes,$(build-pie-default)) 479+link = $(+link-pie) 480+link-tests = $(+link-pie-tests) 481+link-tests-before-inputs = $(+link-pie-before-inputs) $(rtld-tests-LDFLAGS) 482+link-tests-after-inputs = $(link-libc-tests) $(+link-pie-after-libc) 483+link-printers-tests = $(+link-pie-printers-tests) 484else # not build-pie-default 485+link-before-inputs = -nostdlib -nostartfiles $(no-pie-ldflag) \ 486 $(sysdep-LDFLAGS) $(LDFLAGS) $(LDFLAGS-$(@F)) \ 487 $(relro-LDFLAGS) $(hashstyle-LDFLAGS) \ 488 $(firstword $(CRT-$(@F)) $(csu-objpfx)$(start-installed-name)) \ 489 $(+preinit) $(+prector) 490+link-before-libc = -o $@ $(+link-before-inputs) \ 491 $(filter-out $(addprefix $(csu-objpfx),start.o \ 492 $(start-installed-name))\ 493 $(+preinit) $(link-extra-libs) \ 494 $(common-objpfx)libc% $(+postinit),$^) \ 495 $(link-extra-libs) 496+link-after-libc = $(+postctor) $(+postinit) 497define +link 498$(CC) $(link-libc-rpath-link) $(+link-before-libc) $(rtld-LDFLAGS) \ 499 $(link-extra-flags) $(link-libc) $(+link-after-libc) 500$(call after-link,$@) 501endef 502+link-tests-before-inputs = $(+link-before-inputs) $(rtld-tests-LDFLAGS) 503+link-tests-after-inputs = $(link-libc-tests) $(+link-after-libc) 504define +link-tests 505$(CC) $(+link-before-libc) $(rtld-tests-LDFLAGS) $(link-libc-tests) \ 506 $(+link-after-libc) 507$(call after-link,$@) 508endef 509define +link-printers-tests 510$(CC) $(+link-before-libc) $(built-rtld-LDFLAGS) $(link-libc-printers-tests) \ 511 $(+link-after-libc) 512$(call after-link,$@) 513endef 514endif # build-pie-default 515else # build-static 516+link = $(+link-static) 517+link-tests = $(+link-static-tests) 518+link-tests-before-inputs = $(+link-static-before-inputs) 519+link-tests-after-inputs = $(link-libc-static-tests) $(+link-static-after-libc) 520+link-printers-tests = $(+link-static-tests) 521endif # build-shared 522endif # +link 523 524# The pretty printer test programs need to be compiled without optimizations 525# so they won't confuse gdb. We could use either the 'GCC optimize' pragma 526# or the 'optimize' function attribute to achieve this; however, at least on 527# ARM, gcc always produces different debugging symbols when invoked with 528# a -O greater than 0 than when invoked with -O0, regardless of anything else 529# we're using to suppress optimizations. Therefore, we need to explicitly pass 530# -O0 to it through CFLAGS. 531# Additionally, the build system will try to -include $(common-objpfx)/config.h 532# when compiling the tests, which will throw an error if some special macros 533# (such as __OPTIMIZE__ and IS_IN_build) aren't defined. To avoid this, we 534# tell gcc to define IS_IN_build. 535CFLAGS-printers-tests := -O0 -ggdb3 -DIS_IN_build 536 537ifeq (yes,$(build-shared)) 538# These indicate whether to link using the built ld.so or the installed one. 539installed-rtld-LDFLAGS = -Wl,-dynamic-linker=$(rtlddir)/$(rtld-installed-name) 540built-rtld-LDFLAGS = -Wl,-dynamic-linker=$(elf-objpfx)ld.so 541 542ifndef rtld-LDFLAGS 543rtld-LDFLAGS = $(installed-rtld-LDFLAGS) 544endif 545 546ifndef rtld-tests-LDFLAGS 547ifeq (yes,$(build-hardcoded-path-in-tests)) 548rtld-tests-LDFLAGS = $(built-rtld-LDFLAGS) 549else 550rtld-tests-LDFLAGS = $(installed-rtld-LDFLAGS) 551endif # build-hardcoded-path-in-tests 552endif # rtld-tests-LDFLAGS 553 554endif # build-shared 555 556ifndef link-libc 557ifeq (yes,$(build-shared)) 558# We need the versioned name of libc.so in the deps of $(others) et al 559# so that the symlink to libc.so is created before anything tries to 560# run the linked programs. 561link-libc-rpath = -Wl,-rpath=$(rpath-link) 562link-libc-rpath-link = -Wl,-rpath-link=$(rpath-link) 563 564# For programs which are not tests, $(link-libc-rpath-link) is added 565# directly in $(+link), $(+link-pie) above, so that -Wl,-rpath-link 566# comes before the expansion of LDLIBS-* and affects libraries added 567# there. For shared objects, -Wl,-rpath-link is added via 568# $(build-shlib-helper) and $(build-module-helper) in Makerules (also 569# before the expansion of LDLIBS-* variables). 570 571# Tests use -Wl,-rpath instead of -Wl,-rpath-link for 572# build-hardcoded-path-in-tests. 573ifeq (yes,$(build-hardcoded-path-in-tests)) 574link-libc-tests-rpath-link = $(link-libc-rpath) 575link-test-modules-rpath-link = $(link-libc-rpath) 576else 577link-libc-tests-rpath-link = $(link-libc-rpath-link) 578link-test-modules-rpath-link = 579endif # build-hardcoded-path-in-tests 580 581link-libc-between-gnulib = $(common-objpfx)libc.so$(libc.so-version) \ 582 $(common-objpfx)$(patsubst %,$(libtype.oS),c) \ 583 -Wl,--as-needed $(elf-objpfx)ld.so \ 584 -Wl,--no-as-needed 585link-libc = $(link-libc-between-gnulib) $(gnulib) 586 587link-libc-tests-after-rpath-link = $(gnulib-tests) $(link-libc-between-gnulib) $(gnulib-tests) 588link-libc-tests = $(link-libc-tests-rpath-link) \ 589 $(link-libc-tests-after-rpath-link) 590# Pretty printer test programs always require rpath instead of rpath-link. 591link-libc-printers-tests = $(link-libc-rpath) \ 592 $(link-libc-tests-after-rpath-link) 593 594# This is how to find at build-time things that will be installed there. 595rpath-dirs = math elf dlfcn nss nis rt resolv mathvec support 596rpath-link = \ 597$(common-objdir):$(subst $(empty) ,:,$(patsubst ../$(subdir),.,$(rpath-dirs:%=$(common-objpfx)%))) 598else # build-static 599link-libc = $(common-objpfx)libc.a $(otherlibs) $(gnulib) $(common-objpfx)libc.a $(gnulib) 600link-libc-tests = $(common-objpfx)libc.a $(otherlibs) $(gnulib-tests) $(common-objpfx)libc.a $(gnulib-tests) 601endif # build-shared 602endif # link-libc 603 604# Differences in the linkers on the various platforms. 605LDFLAGS-rpath-ORIGIN = -Wl,-rpath,'$$ORIGIN' 606LDFLAGS-soname-fname = -Wl,-soname,$(@F) 607LDFLAGS-rdynamic = -rdynamic 608LDFLAGS-Bsymbolic = -Bsymbolic 609 610# Choose the default search path for the dynamic linker based on 611# where we will install libraries. 612ifneq ($(libdir),$(slibdir)) 613default-rpath = $(slibdir):$(libdir) 614else 615default-rpath = $(libdir) 616endif 617 618ifndef link-extra-libs 619link-extra-libs = $(LDLIBS-$(@F)) 620link-extra-libs-static = $(link-extra-libs) 621endif 622 623# The static libraries. 624link-libc-static = -Wl,--start-group $(common-objpfx)libc.a $(static-gnulib) -Wl,--end-group 625link-libc-static-tests = -Wl,--start-group $(common-objpfx)libc.a $(static-gnulib-tests) -Wl,--end-group 626 627# How to link against libgcc. Some libgcc functions, such as those 628# for "long long" arithmetic or software floating point, can always be 629# built without use of C library headers and do not have any global 630# state so can safely be linked statically into any executable or 631# shared library requiring them; these functions are in libgcc.a. 632# Other functions, relating to exception handling, may require C 633# library headers to build and it may not be safe to have more than 634# one copy of them in a process; these functions are only in 635# libgcc_s.so and libgcc_eh.a. 636# 637# To avoid circular dependencies when bootstrapping, it is desirable 638# to avoid use of libgcc_s and libgcc_eh in building glibc. Where any 639# glibc functionality (in particular, thread cancellation) requires 640# exception handling, this is implemented through dlopen of libgcc_s 641# to avoid unnecessary dependencies on libgcc_s by programs not using 642# that functionality; executables built with glibc do not use 643# exception handling other than through thread cancellation. 644# 645# Undefined references to functions from libgcc_eh or libgcc_s may 646# arise for code built with -fexceptions. In the case of statically 647# linked programs installed by glibc, unwinding will never actually 648# occur at runtime and the use of elf/static-stubs.c to resolve these 649# references is safe. In the case of statically linked test programs 650# and test programs built with -fexceptions, unwinding may occur in 651# some cases and it is preferable to link with libgcc_eh or libgcc_s 652# so that the testing is as similar as possible to how programs will 653# be built with the installed glibc. 654# 655# Some architectures have architecture-specific systems for exception 656# handling that may involve undefined references to 657# architecture-specific functions. On those architectures, 658# gnulib-arch and static-gnulib-arch may be defined in sysdeps 659# makefiles to use additional libraries for linking executables and 660# shared libraries built by glibc. 661ifndef gnulib 662ifneq ($(have-cc-with-libunwind),yes) 663 libunwind = 664else 665 libunwind = -lunwind 666endif 667libgcc_eh := -Wl,--as-needed -lgcc_s $(libunwind) -Wl,--no-as-needed 668gnulib-arch = 669gnulib = -lgcc $(gnulib-arch) 670gnulib-tests := -lgcc $(libgcc_eh) 671static-gnulib-arch = 672# By default, elf/static-stubs.o, instead of -lgcc_eh, is used to 673# statically link programs. When --disable-shared is used, we use 674# -lgcc_eh since elf/static-stubs.o isn't sufficient. 675ifeq (yes,$(build-shared)) 676static-gnulib = -lgcc $(static-gnulib-arch) 677else 678static-gnulib = -lgcc -lgcc_eh $(static-gnulib-arch) 679endif 680static-gnulib-tests := -lgcc -lgcc_eh $(libunwind) 681libc.so-gnulib := -lgcc 682endif 683+preinit = $(addprefix $(csu-objpfx),crti.o) 684+postinit = $(addprefix $(csu-objpfx),crtn.o) 685+prector = `$(CC) $(sysdep-LDFLAGS) --print-file-name=crtbegin.o` 686+postctor = `$(CC) $(sysdep-LDFLAGS) --print-file-name=crtend.o` 687# Variants of the two previous definitions for linking PIE programs. 688+prectorS = `$(CC) $(sysdep-LDFLAGS) --print-file-name=crtbeginS.o` 689+postctorS = `$(CC) $(sysdep-LDFLAGS) --print-file-name=crtendS.o` 690# Variants of the two previous definitions for statically linking programs. 691ifeq (yes,$(enable-static-pie)) 692# Static PIE must use PIE variants. 693+prectorT = $(+prectorS) 694+postctorT = $(+postctorS) 695else 696+prectorT = `$(CC) $(sysdep-LDFLAGS) --print-file-name=crtbeginT.o` 697+postctorT = `$(CC) $(sysdep-LDFLAGS) --print-file-name=crtend.o` 698endif 699csu-objpfx = $(common-objpfx)csu/ 700elf-objpfx = $(common-objpfx)elf/ 701 702# A command that, prepended to the name and arguments of a program, 703# and run on the build system, causes that program with those 704# arguments to be run on the host for which the library is built. 705ifndef test-wrapper 706test-wrapper = 707endif 708# Likewise, but the name of the program is preceded by 709# <variable>=<value> assignments for environment variables. 710ifndef test-wrapper-env 711test-wrapper-env = $(test-wrapper) env 712endif 713# Likewise, but the program's environment will be empty except for any 714# explicit <variable>=<value> assignments preceding the program name. 715ifndef test-wrapper-env-only 716test-wrapper-env-only = $(test-wrapper) env -i 717endif 718 719# Whether to run test programs built for the library's host system. 720ifndef run-built-tests 721ifeq (yes|,$(cross-compiling)|$(test-wrapper)) 722run-built-tests = no 723else 724run-built-tests = yes 725endif 726endif 727 728# Whether to stop immediately when a test fails. Nonempty means to 729# stop, empty means not to stop. 730ifndef stop-on-test-failure 731stop-on-test-failure = 732endif 733 734# How to run a program we just linked with our library. 735# The program binary is assumed to be $(word 2,$^). 736built-program-file = $(dir $(word 2,$^))$(notdir $(word 2,$^)) 737rtld-prefix = $(elf-objpfx)$(rtld-installed-name) \ 738 --library-path \ 739 $(rpath-link)$(patsubst %,:%,$(sysdep-library-path)) 740ifeq (yes,$(build-shared)) 741comma = , 742sysdep-library-path = \ 743$(subst $(empty) ,:,$(strip $(patsubst -Wl$(comma)-rpath-link=%, %,\ 744 $(filter -Wl$(comma)-rpath-link=%,\ 745 $(sysdep-LDFLAGS))))) 746# $(run-via-rtld-prefix) is a command that, when prepended to the name 747# of a program built with the newly built library, produces a command 748# that, executed on the host for which the library is built, runs that 749# program. For tests listed in tests-static or xtests-static, it is 750# empty. 751run-via-rtld-prefix = \ 752 $(if $(strip $(filter $(notdir $(built-program-file)), \ 753 $(tests-static) $(xtests-static))),, $(rtld-prefix)) 754else 755run-via-rtld-prefix = 756endif 757# $(run-program-env) is the default environment variable settings to 758# use when running a program built with the newly built library. 759run-program-env = GCONV_PATH=$(common-objpfx)iconvdata \ 760 LOCPATH=$(common-objpfx)localedata LC_ALL=C 761# $(run-program-prefix) is a command that, when prepended to the name 762# of a program built with the newly built library, produces a command 763# that, executed on the build system on which "make" is run, runs that 764# program. $(run-program-prefix-before-env) and 765# $(run-program-prefix-after-env) are similar, but separate parts 766# before and after a list of environment variables. 767run-program-prefix-before-env = $(test-wrapper-env) 768run-program-prefix-after-env = $(run-via-rtld-prefix) 769run-program-prefix = $(run-program-prefix-before-env) $(run-program-env) \ 770 $(run-program-prefix-after-env) 771# $(built-program-cmd) is a command that, executed on the build system 772# on which "make" is run, runs the newly built program that is the 773# second dependency of the makefile target in which 774# $(built-program-cmd) is used. $(built-program-cmd-before-env) and 775# $(built-program-cmd-after-env) are similar, before and after a list 776# of environment variables. 777built-program-cmd-before-env = $(test-wrapper-env) 778built-program-cmd-after-env = $(run-via-rtld-prefix) $(built-program-file) 779built-program-cmd = $(built-program-cmd-before-env) $(run-program-env) \ 780 $(built-program-cmd-after-env) 781# $(host-built-program-cmd) is a command that, executed on the host 782# for which the library is built, runs the newly built program that is 783# the second dependency of the makefile target in which 784# $(host-built-program-cmd) is used. 785host-built-program-cmd = $(run-via-rtld-prefix) $(built-program-file) 786# $(ld-library-path) is the common content to be set in LD_LIBRARY_PATH 787# for running static binaries that may load dynamic objects. 788ld-library-path = $(objpfx):$(common-objpfx)$(addprefix :,$(sysdep-ld-library-path)) 789 790ifndef LD 791LD := ld -X 792endif 793 794# $(test-via-rtld-prefix) is a command that, when prepended to the name 795# of a test program built with the newly built library, produces a command 796# that, executed on the host for which the library is built, runs that 797# program. For tests listed in tests-static or xtests-static as well 798# as when test programs are hardcoded to the newly built libraries, it 799# is empty. 800 801# $(test-program-prefix) is a command that, when prepended to the name 802# of a test program built with the newly built library, produces a command 803# that, executed on the build system on which "make" is run, runs that 804# test program. $(test-program-prefix-before-env) and 805# $(test-program-prefix-after-env) are similar, before and after a 806# list of environment variables. 807 808# $(test-program-cmd) is a command that, executed on the build system 809# on which "make" is run, runs the newly built test program that is the 810# second dependency of the makefile target in which 811# $(test-program-cmd) is used. $(test-program-cmd-before-env) and 812# $(test-program-cmd-after-env) are similar, before and after a list 813# of environment variables. 814 815# $(host-test-program-cmd) is a command that, executed on the host 816# for which the library is built, runs the newly built test program that 817# is the second dependency of the makefile target in which 818# $(host-test-program-cmd) is used. 819 820ifeq (yes,$(build-hardcoded-path-in-tests)) 821test-via-rtld-prefix = 822test-program-prefix-before-env = $(test-wrapper-env) 823test-program-prefix-after-env = 824test-program-prefix = $(test-program-prefix-before-env) $(run-program-env) \ 825 $(test-program-prefix-after-env) 826test-program-cmd-before-env = $(test-wrapper-env) 827test-program-cmd-after-env = $(built-program-file) 828test-program-cmd = $(test-program-cmd-before-env) $(run-program-env) \ 829 $(test-program-cmd-after-env) 830host-test-program-cmd = $(built-program-file) 831else 832test-via-rtld-prefix = $(run-via-rtld-prefix) 833test-program-prefix-before-env = $(run-program-prefix-before-env) 834test-program-prefix-after-env = $(run-program-prefix-after-env) 835test-program-prefix = $(run-program-prefix) 836test-program-cmd-before-env = $(built-program-cmd-before-env) 837test-program-cmd-after-env = $(built-program-cmd-after-env) 838test-program-cmd = $(built-program-cmd) 839host-test-program-cmd = $(host-built-program-cmd) 840endif 841 842# Extra flags to pass to GCC. 843ifeq ($(all-warnings),yes) 844+gccwarn := -Wall -Wwrite-strings -Wcast-qual -Wbad-function-cast -Wmissing-noreturn -Wmissing-prototypes -Wmissing-declarations -Wcomment -Wcomments -Wtrigraphs -Wsign-compare -Wfloat-equal -Wmultichar 845else 846+gccwarn := -Wall -Wwrite-strings 847endif 848+gccwarn += -Wundef 849ifeq ($(enable-werror),yes) 850+gccwarn += -Werror 851endif 852+gccwarn-c = -Wstrict-prototypes -Wold-style-definition 853 854# We do not depend on the address of constants in different files to be 855# actually different, so allow the compiler to merge them all. 856+merge-constants = -fmerge-all-constants 857 858# We have to assume that glibc functions are called in any rounding 859# mode and also change the rounding mode in a few functions. So, 860# disable any optimization that assume default rounding mode. 861+math-flags = -frounding-math 862 863# Logically only "libnldbl", "nonlib" and "testsuite" should be using 864# -fno-math-errno. However due to GCC bug #88576, only "libm" can use 865# -fno-math-errno. 866+extra-math-flags = $(if $(filter libm,$(in-module)),-fno-math-errno,-fmath-errno) 867 868# Use 64 bit time_t support for installed programs 869installed-modules = nonlib nscd lddlibc4 ldconfig locale_programs \ 870 iconvprogs libnss_files libnss_compat libnss_db libnss_hesiod \ 871 libutil libpcprofile libSegFault 872+extra-time-flags = $(if $(filter $(installed-modules),\ 873 $(in-module)),-D_TIME_BITS=64 -D_FILE_OFFSET_BITS=64) 874 875# We might want to compile with some stack-protection flag. 876ifneq ($(stack-protector),) 877+stack-protector=$(stack-protector) 878endif 879 880# Some routines are unsafe to build with stack-protection since they're called 881# before the stack check guard is set up. Provide a way to disable stack 882# protector. The first argument is the extension (.o, .os, .oS) and the second 883# is a list of routines that this path should be applied to. 884define elide-stack-protector 885$(if $(filter $(@F),$(patsubst %,%$(1),$(2))), $(no-stack-protector)) 886endef 887 888# The program that makes Emacs-style TAGS files. 889ETAGS := etags 890 891# The `xgettext' program for producing .pot files from sources. 892ifndef XGETTEXT 893XGETTEXT = xgettext 894endif 895 896# The `m4' macro processor; this is used by sysdeps/sparc/Makefile (and 897# perhaps others) to preprocess assembly code in some cases. 898M4 = m4 899 900# To force installation of files even if they are older than the 901# installed files. This variable is included in the dependency list 902# of all installation targets. 903ifeq ($(force-install),yes) 904+force = force-install 905else 906+force = 907endif 908 909#### 910#### End of configuration variables. 911#### 912 913# This tells some versions of GNU make before 3.63 not to export all variables. 914.NOEXPORT: 915 916# We want to echo the commands we're running without 917# umpteen zillion filenames along with it (we use `...' instead) 918# but we don't want this echoing done when the user has said 919# he doesn't want to see commands echoed by using -s. 920ifneq "$(findstring s,$(MAKEFLAGS))" "" # if -s 921+cmdecho := echo >/dev/null 922else # not -s 923+cmdecho := echo 924endif # -s 925 926# These are the flags given to the compiler to tell 927# it what sort of optimization and/or debugging output to do. 928ifndef +cflags 929# If `CFLAGS' was defined, use that. 930ifdef CFLAGS 931+cflags := $(filter-out -I%,$(CFLAGS)) 932endif # CFLAGS 933endif # +cflags 934 935# If none of the above worked, default to "-g -O". 936ifeq "$(strip $(+cflags))" "" 937+cflags := $(default_cflags) 938endif # $(+cflags) == "" 939 940# Force building with -fno-common because hidden_def, compat_symbol 941# and other constructs do not work for common symbols (and would 942# otherwise require specifying __attribute__ ((nocommon)) on a 943# case-by-case basis). 944+cflags += $(cflags-cpu) $(+gccwarn) $(+merge-constants) $(+math-flags) \ 945 $(+stack-protector) -fno-common 946+gcc-nowarn := -w 947 948# Each sysdeps directory can contain header files that both will be 949# used to compile and will be installed. Each can also contain an 950# include/ subdirectory, whose header files will be used to compile 951# but will not be installed, and will take precedence over the 952# installed files. This mirrors the top-level include/ subdirectory. 953+sysdep-includes := $(foreach dir,$(+sysdep_dirs),\ 954 $(addprefix -I,$(wildcard $(dir)/include) $(dir))) 955 956# These are flags given to the C compiler to tell it to look for 957# include files (including ones given in angle brackets) in the parent 958# library source directory, in the include directory, and in the 959# current directory. 960+includes = -I$(..)include $(if $(subdir),$(objpfx:%/=-I%)) \ 961 $(+sysdep-includes) $(includes) \ 962 $(patsubst %/,-I%,$(..)) $(libio-include) -I. $(sysincludes) 963 964# Since libio has several internal header files, we use a -I instead 965# of many little headers in the include directory. 966libio-include = -I$(..)libio 967 968# List of non-library modules that we build. 969built-modules = iconvprogs iconvdata ldconfig lddlibc4 libmemusage \ 970 libSegFault libpcprofile librpcsvc locale-programs \ 971 memusagestat nonlib nscd extramodules libnldbl libsupport \ 972 testsuite testsuite-internal 973 974in-module = $(subst -,_,$(firstword $(libof-$(basename $(@F))) \ 975 $(libof-$(<F)) \ 976 $(libof-$(@F)) \ 977 libc)) 978 979# Build ld.so, libc.so and libpthread.so with -ftls-model=initial-exec 980tls-model = $(if $(filter libpthread rtld \ 981 libc,$(in-module)),-ftls-model=initial-exec,) 982 983module-cppflags-real = -include $(common-objpfx)libc-modules.h \ 984 -DMODULE_NAME=$(in-module) 985 986# We don't need libc-modules.h and the MODULE_NAME definition for .v.i 987# files. These targets don't (and will likely never need to) use the IS_IN 988# facility. In fact, shlib-versions should not use it because that will 989# create a circular dependency as libc-modules.h is generated from 990# shlib-versions. 991module-cppflags = $(if $(filter %.mk.i %.v.i,$(@F)),,$(module-cppflags-real)) 992 993# These are the variables that the implicit compilation rules use. 994# Note that we can't use -std=* in CPPFLAGS, because it overrides 995# the implicit -lang-asm and breaks cpp behavior for .S files--notably 996# it causes cpp to stop predefining __ASSEMBLER__. 997CPPFLAGS = $(config-extra-cppflags) $(CPPUNDEFS) $(CPPFLAGS-config) \ 998 $($(subdir)-CPPFLAGS) \ 999 $(+includes) $(defines) $(module-cppflags) \ 1000 -include $(..)include/libc-symbols.h $(sysdep-CPPFLAGS) \ 1001 $(CPPFLAGS-$(suffix $@)) \ 1002 $(foreach lib,$(libof-$(basename $(@F))) \ 1003 $(libof-$(<F)) $(libof-$(@F)),$(CPPFLAGS-$(lib))) \ 1004 $(CPPFLAGS-$(<F)) $(CPPFLAGS-$(@F)) $(CPPFLAGS-$(basename $(@F))) 1005 1006ifneq (no,$(have-tunables)) 1007CPPFLAGS += -DTOP_NAMESPACE=glibc 1008endif 1009 1010override CFLAGS = -std=gnu11 -fgnu89-inline $(config-extra-cflags) \ 1011 $(filter-out %frame-pointer,$(+cflags)) $(+gccwarn-c) \ 1012 $(+extra-math-flags) $(+extra-time-flags) \ 1013 $(sysdep-CFLAGS) $(CFLAGS-$(suffix $@)) $(CFLAGS-$(<F)) \ 1014 $(CFLAGS-$(@F)) $(tls-model) \ 1015 $(foreach lib,$(libof-$(basename $(@F))) \ 1016 $(libof-$(<F)) $(libof-$(@F)),$(CFLAGS-$(lib))) 1017# Use our copies of cstdlib and cmath. 1018override CXXFLAGS = -I$(common-objpfx) $(c++-sysincludes) \ 1019 $(filter-out %frame-pointer,$(+cflags)) $(sysdep-CFLAGS) \ 1020 $(CFLAGS-$(suffix $@)) $(CFLAGS-$(<F)) $(CFLAGS-$(@F)) 1021 1022# If everything is compiled with -fPIC (implicitly) we must tell this by 1023# defining the PIC symbol. 1024ifeq (yes,$(build-pic-default)) 1025pic-default = -DPIC 1026endif 1027 1028# Enable object files for different versions of the library. 1029# Various things use $(object-suffixes) to know what all to make. 1030# The compilation rules use $(CPPFLAGS-${SUFFIX}) and $(CFLAGS-${SUFFIX}) 1031# to pass different flags for each flavor. 1032libtypes = $(foreach o,$(object-suffixes-for-libc),$(libtype$o)) 1033# .op may be added to all-object-suffixes below. 1034all-object-suffixes := .o .os .oS 1035object-suffixes := 1036CPPFLAGS-.o = $(pic-default) 1037# libc.a must be compiled with -fPIE/-fpie for static PIE. 1038CFLAGS-.o = $(filter %frame-pointer,$(+cflags)) $(pie-default) 1039libtype.o := lib%.a 1040object-suffixes += .o 1041ifeq (yes,$(build-shared)) 1042# Under --enable-shared, we will build a shared library of PIC objects. 1043# The PIC object files are named foo.os. 1044object-suffixes += .os 1045pic-cppflags = -DPIC -DSHARED 1046CPPFLAGS-.os = $(pic-cppflags) 1047CFLAGS-.os = $(filter %frame-pointer,$(+cflags)) $(pic-ccflag) 1048libtype.os := lib%_pic.a 1049# This can be changed by a sysdep makefile 1050pic-ccflag = -fPIC 1051# This one should always stay like this unless there is a very good reason. 1052PIC-ccflag = -fPIC 1053endif 1054# This can be changed by a sysdep makefile 1055pie-ccflag = -fpie 1056no-pie-ccflag = -fno-pie 1057# This one should always stay like this unless there is a very good reason. 1058PIE-ccflag = -fPIE 1059ifeq (yes,$(build-profile)) 1060# Under --enable-profile, we will build a static library of profiled objects. 1061# The profiled object files are named foo.op. 1062all-object-suffixes += .op 1063object-suffixes += .op 1064CPPFLAGS-.op = -DPROF $(pic-default) 1065# libc_p.a must be compiled with -fPIE/-fpie for static PIE. 1066CFLAGS-.op = -pg $(pie-default) 1067libtype.op = lib%_p.a 1068endif 1069 1070# Convenience variable for when we want to treat shared-library cases 1071# differently from the rest. 1072object-suffixes-noshared := $(filter-out .os,$(object-suffixes)) 1073 1074object-suffixes-for-libc := $(object-suffixes) 1075 1076ifeq (yes,$(build-shared)) 1077# Build special library that contains the static-only routines for libc. 1078object-suffixes-for-libc += .oS 1079 1080# Must build the routines as PIC, though, because they can end up in (users') 1081# shared objects. We don't want to use CFLAGS-os because users may, for 1082# example, make that processor-specific. 1083CFLAGS-.oS = $(CFLAGS-.o) $(PIC-ccflag) $(extra-nonshared-cflags) 1084CPPFLAGS-.oS = $(CPPFLAGS-.o) -DPIC -DLIBC_NONSHARED=1 1085libtype.oS = lib%_nonshared.a 1086endif 1087 1088# The assembler can generate debug information too. 1089ifndef ASFLAGS 1090ASFLAGS := $(filter -g% -fdebug-prefix-map=%,$(CFLAGS)) 1091endif 1092override ASFLAGS += -Werror=undef $(ASFLAGS-config) $(asflags-cpu) 1093 1094ifndef BUILD_CC 1095BUILD_CC = $(CC) 1096endif 1097 1098move-if-change = $(SHELL) $(..)scripts/move-if-change 1099 1100-include $(common-objpfx)sysd-sorted 1101subdirs = $(sorted-subdirs) 1102subdir-srcdirs = $(foreach dir,$(subdirs),\ 1103 $(firstword $($(dir)-srcdir) $(..)$(dir))) 1104 1105# This is a pair of implicit rules to preprocess a file with # comments, 1106# %ifdef et al, based on config.h settings or other %include'd files. 1107# We use chained rules instead of a pipeline here so that we can properly 1108# check the exit status of cpp rather than using its bad output when there 1109# is a preprocessing error. Another rule should depend on the output file 1110# `FOO.v', and along with that `FOO.v.i' should be given dependencies 1111# listing both its input files, and any header files that it may reference 1112# (but no commands). 1113%.v.i: $(common-objpfx)config.h $(..)Makeconfig 1114 sed '/^[ ]*%/!s/#.*$$//;/^[ ]*$$/d;s/^[ ]*%/#/' \ 1115 $(filter-out FORCE %.h $(..)Makeconfig,$^) \ 1116 | $(CC) -E -undef $(CPPFLAGS) -x assembler-with-cpp - \ 1117 > $@T 1118 mv -f $@T $@ 1119%.v: %.v.i 1120 sed '/^[ ]*#/d;/^[ ]*$$/d' $< > $@T 1121 mv -f $@T $@ 1122 1123ifeq (yes, $(build-shared)) 1124 1125# To generate a header to support more than one ABI for different 1126# architecture variants, the CPU/Makefile defines abi-variants to be a 1127# list of names for those variants (e.g. 32 64), and, for each variant, 1128# defines abi-$(variant)-condition to be the condition for those options 1129# to use in a C #if condition. abi-includes may be defined to a list of 1130# headers to include in the generated header, if the default does not 1131# suffice. default-abi is defined to be the ABI for the current glibc 1132# build. 1133 1134ifndef abi-includes 1135abi-includes := bits/wordsize.h 1136endif 1137 1138# Process the shlib-versions file, which tells us what shared library 1139# version numbers to use when we install shared objects on this system. 1140# We need to wait until $(subdirs) is complete. 1141ifeq ($(sysd-sorted-done),t) 1142-include $(common-objpfx)soversions.mk 1143ifndef avoid-generated 1144$(common-objpfx)shlib-versions.v.i: \ 1145 $(wildcard $(+sysdep_dirs:=/shlib-versions) \ 1146 $(subdir-srcdirs:=/shlib-versions)) \ 1147 $(..)shlib-versions 1148 1149$(common-objpfx)soversions.i: $(..)scripts/soversions.awk \ 1150 $(common-objpfx)shlib-versions.v 1151 $(AWK) -f $^ > $@T 1152 mv -f $@T $@ 1153$(common-objpfx)soversions.mk: $(common-objpfx)soversions.i $(..)Makeconfig 1154 (while read which lib number setname; do \ 1155 eval seen_$$which=1; \ 1156 test x"$$which" = xDEFAULT || continue; \ 1157 case $$number in \ 1158 [0-9]*) echo "$$lib.so-version=.$$number"; \ 1159 echo "all-sonames+=$$lib=$$lib.so\$$($$lib.so-version)";;\ 1160 *) echo "$$lib.so-version=$$number"; \ 1161 echo "all-sonames+=$$lib=\$$($$lib.so-version)";;\ 1162 esac; \ 1163 done; \ 1164 echo soversions.mk-done = t;) < $< > $@T; exit 0 1165 mv -f $@T $@ 1166endif 1167endif 1168 1169postclean-generated += soversions.mk soversions.i \ 1170 shlib-versions.v shlib-versions.v.i 1171 1172before-compile += $(common-objpfx)libc-modules.h 1173common-generated += libc-modules.h libc-modules.stmp 1174ifeq ($(soversions.mk-done),t) 1175# Generate a header with macro definitions for use with the IS_IN macro. 1176# These are the possible values for the MODULE_NAME macro defined when building 1177# sources, to identify which module the translation unit is going to be built 1178# into. 1179$(common-objpfx)libc-modules.h: $(common-objpfx)libc-modules.stmp; @: 1180$(common-objpfx)libc-modules.stmp: $(..)scripts/gen-libc-modules.awk \ 1181 $(common-objpfx)soversions.i 1182 $(AWK) -v buildlist="$(subst -,_,$(built-modules))" -f $^ > ${@:stmp=T} 1183 $(move-if-change) ${@:stmp=T} ${@:stmp=h} 1184 touch $@ 1185 1186endif 1187 1188# Build the tunables list header early since it could be used by any module in 1189# glibc. 1190ifneq (no,$(have-tunables)) 1191before-compile += $(common-objpfx)dl-tunable-list.h 1192common-generated += dl-tunable-list.h dl-tunable-list.stmp 1193 1194$(common-objpfx)dl-tunable-list.h: $(common-objpfx)dl-tunable-list.stmp; @: 1195$(common-objpfx)dl-tunable-list.stmp: \ 1196 $(..)scripts/gen-tunables.awk \ 1197 $(..)elf/dl-tunables.list \ 1198 $(wildcard $(subdirs:%=$(..)%/dl-tunables.list)) \ 1199 $(wildcard $(sysdirs:%=%/dl-tunables.list)) 1200 $(AWK) -f $^ > ${@:stmp=T} 1201 $(move-if-change) ${@:stmp=T} ${@:stmp=h} 1202 touch $@ 1203endif 1204 1205# Dump the GCC macros used by the default compiler flags to a header 1206# file, so that they can be inspected when using different compiler 1207# flags. Add the GCCMACRO prefix to make these macro names unique. 1208$(common-objpfx)gcc-macros.h.in: $(common-objpfx)config.status 1209 $(CC) $(CFLAGS) $(CPPFLAGS) -E -dM -x c -o $@ /dev/null 1210$(common-objpfx)gcc-macros.h: $(common-objpfx)gcc-macros.h.in 1211 sed 's/^#define /#define GCCMACRO/' < $< > $@ 1212before-compile += $(common-objpfx)gcc-macros.h 1213 1214# Generate version maps, but wait until sysdep-subdirs is known 1215ifeq ($(sysd-sorted-done),t) 1216ifeq ($(build-shared),yes) 1217-include $(common-objpfx)sysd-versions 1218-include $(common-objpfx)Versions.mk 1219$(addprefix $(common-objpfx),$(version-maps)): $(common-objpfx)sysd-versions 1220common-generated += $(version-maps) 1221postclean-generated += sysd-versions Versions.all abi-versions.h \ 1222 Versions.def Versions.v.i Versions.v Versions.mk 1223 1224ifndef avoid-generated 1225ifneq ($(sysd-versions-subdirs),$(sorted-subdirs) $(config-sysdirs)) 1226sysd-versions-force = FORCE 1227FORCE: 1228endif 1229 1230$(common-objpfx)Versions.def: $(..)scripts/versionlist.awk \ 1231 $(common-objpfx)Versions.v 1232 LC_ALL=C $(AWK) -f $^ > $@T 1233 mv -f $@T $@ 1234 1235$(common-objpfx)Versions.all: $(..)scripts/firstversions.awk \ 1236 $(common-objpfx)soversions.i \ 1237 $(common-objpfx)Versions.def 1238 { while read which lib version setname; do \ 1239 test x"$$which" = xDEFAULT || continue; \ 1240 test -z "$$setname" || echo "$$lib : $$setname"; \ 1241 done < $(word 2,$^); \ 1242 cat $(word 3,$^); \ 1243 } | LC_ALL=C $(AWK) -f $< > $@T 1244 mv -f $@T $@ 1245$(common-objpfx)Versions.mk: $(..)scripts/haveversions.awk \ 1246 $(common-objpfx)Versions.all 1247 $(AWK) -f $^ > $@T 1248 mv -f $@T $@ 1249# See %.v/%.v.i implicit rules in Makeconfig. 1250$(common-objpfx)Versions.v.i: $(wildcard $(subdirs:%=$(..)%/Versions)) \ 1251 $(wildcard $(sysdirs:%=%/Versions)) \ 1252 $(sysd-versions-force) 1253$(common-objpfx)sysd-versions: $(common-objpfx)versions.stmp 1254$(common-objpfx)versions.stmp: $(common-objpfx)Versions.all \ 1255 $(common-objpfx)Versions.v \ 1256 $(..)scripts/versions.awk 1257 ( echo 'sysd-versions-subdirs = $(subdirs) $(config-sysdirs)' ; \ 1258 cat $(word 2,$^) \ 1259 | LC_ALL=C $(AWK) -v buildroot=$(common-objpfx) -v defsfile=$< \ 1260 -v move_if_change='$(move-if-change)' \ 1261 -f $(word 3,$^); \ 1262 ) > $(common-objpfx)sysd-versionsT 1263 mv -f $(common-objpfx)sysd-versionsT $(common-objpfx)sysd-versions 1264 touch $@ 1265endif # avoid-generated 1266endif # $(build-shared) = yes 1267 1268-include $(common-objpfx)time64-compat.mk 1269postclean-generated += time64-compat.mk 1270 1271$(common-objpfx)time64-compat.mk: $(common-objpfx)time64-compat.mk.i \ 1272 $(sysd-versions-force) 1273 sed '/^[ ]*#/d;/^[ ]*$$/d' $< > $@T 1274 mv -f $@T $@ 1275$(common-objpfx)time64-compat.mk.i: $(..)Makeconfig 1276 printf "#include <time64-compat.h>\n#ifdef TIME64_NON_DEFAULT\nhave-time64-compat = yes\n#endif" \ 1277 | $(CC) -E -undef $(CPPFLAGS) -x assembler-with-cpp - > $@T 1278 mv -f $@T $@ 1279 1280 1281endif # sysd-sorted-done 1282 1283# The name under which the run-time dynamic linker is installed. 1284# We are currently going for the convention that `/lib/ld.so.1' 1285# names the SVR4/ELF ABI-compliant dynamic linker. 1286ifndef rtld-installed-name 1287ifdef ld.so-version 1288rtld-installed-name = $(ld.so-version) 1289else 1290rtld-installed-name = ld.so.1 1291endif 1292endif 1293 1294ifndef rtld-version-installed-name 1295rtld-version-installed-name = ld-$(version).so 1296endif 1297 1298endif # build-shared 1299 1300 1301ifeq ($(build-shared),yes) 1302libm = $(common-objpfx)math/libm.so$(libm.so-version) 1303libmvec = $(common-objpfx)mathvec/libmvec.so$(libmvec.so-version) 1304else 1305libm = $(common-objpfx)math/libm.a 1306libmvec = $(common-objpfx)mathvec/libmvec.a 1307endif 1308 1309ifeq ($(build-shared),yes) 1310libsupport = $(common-objpfx)support/libsupport_nonshared.a 1311else 1312libsupport = $(common-objpfx)support/libsupport.a 1313endif 1314 1315# This is a partial list of subdirectories containing the library source. 1316# The order is more or less arbitrary. The sorting step will take care of the 1317# dependencies and generate sorted-subdirs dynamically. 1318all-subdirs = csu assert ctype locale intl catgets math setjmp signal \ 1319 stdlib stdio-common libio malloc string wcsmbs time dirent \ 1320 grp pwd posix io termios resource misc socket sysvipc gmon \ 1321 gnulib iconv iconvdata wctype manual shadow gshadow po argp \ 1322 localedata timezone rt conform debug mathvec support \ 1323 dlfcn elf 1324 1325ifeq ($(build-crypt),yes) 1326all-subdirs += crypt 1327rpath-dirs += crypt 1328endif 1329 1330ifndef avoid-generated 1331# sysd-sorted itself will contain rules making the sysd-sorted target 1332# depend on Depend files. But if you just added a Depend file to an 1333# existing directory not in all-subdirs, then sysd-sorted needs to 1334# be regenerated, so it depends on existing $(sorted-subdirs:=/Depend) files. 1335all-Depend-files := $(wildcard $(sort \ 1336 $(foreach dir,$(all-subdirs),\ 1337 $(firstword $($(dir)-srcdir) \ 1338 $(..)$(dir))/Depend) \ 1339 $(sorted-subdirs:=/Depend))) 1340$(common-objpfx)sysd-sorted: $(..)scripts/gen-sorted.awk \ 1341 $(common-objpfx)config.make $(..)Makeconfig \ 1342 $(wildcard $(sysdirs:=/Subdirs)) \ 1343 $(all-Depend-files) 1344 $(AWK) -f $< \ 1345 -v subdirs='$(all-subdirs)' \ 1346 -v srcpfx='$(..)' \ 1347 $(filter %/Subdirs %/Depend,$^) > $@-tmp 1348 mv -f $@-tmp $@ 1349$(all-Depend-files): ; 1350endif 1351 1352# This gives partial TARGET:SOURCE pattern pairs to have rules 1353# emitted into sysd-rules. A sysdeps Makeconfig fragment can 1354# add its own special object file prefix to this list with e.g. foo-%:% 1355# to have foo-*.? compiled from *.? using $(foo-CPPFLAGS). 1356sysd-rules-patterns := %:% rtld-%:rtld-% rtld-%:% m_%:s_% 1357 1358# Let sysdeps/ subdirs contain a Makeconfig fragment for us to include here. 1359sysdep-makeconfigs := $(wildcard $(+sysdep_dirs:=/Makeconfig)) 1360ifneq (,$(sysdep-makeconfigs)) 1361include $(sysdep-makeconfigs) 1362endif 1363 1364# Compute just the target patterns. Makeconfig has set sysd-rules-patterns. 1365sysd-rules-targets := $(sort $(foreach p,$(sysd-rules-patterns),\ 1366 $(firstword $(subst :, ,$p)))) 1367 1368# $(libpthread-routines-var) and $(librt-routines-var) are the make 1369# variable to which pthread routines need to be added to land in the 1370# right library. 1371ifeq ($(pthread-in-libc),yes) 1372libpthread-routines-var = routines 1373librt-routines-var = routines 1374libanl-routines-var = routines 1375else 1376libpthread-routines-var = libpthread-routines 1377librt-routines-var = librt-routines 1378libanl-routines-var = libanl-routines 1379endif 1380 1381# A sysdeps Makeconfig fragment may set libc-reentrant to yes. 1382ifeq (yes,$(libc-reentrant)) 1383defines += -D_LIBC_REENTRANT 1384 1385libio-mtsafe = -D_IO_MTSAFE_IO 1386endif 1387 1388# The name to give to a test in test results summaries. 1389test-name = $(strip $(patsubst %.out, %, $(patsubst $(common-objpfx)%, %, $@))) 1390 1391# Likewise, in XFAIL variable names. 1392test-xfail-name = $(strip $(patsubst %.out, %, $(patsubst $(objpfx)%, %, $@))) 1393 1394# Command to output a test status line (such as PASS: test-name). If 1395# test-xfail-$(test-xfail-name) has a nonempty value, the status will be 1396# XPASS or XFAIL rather than PASS or FAIL. 1397evaluate-test = $(..)scripts/evaluate-test.sh $(test-name) $$? \ 1398 $(if $(test-xfail-$(test-xfail-name)),true,false) \ 1399 $(if $(stop-on-test-failure),true,false) \ 1400 > $(common-objpfx)$(test-name).test-result 1401 1402endif # Makeconfig not yet included 1403 1404# Local Variables: 1405# mode: makefile 1406# End: 1407