| # Copyright (C) 1991-2014 Free Software Foundation, Inc. |
| # This file is part of the GNU C Library. |
| |
| # The GNU C Library is free software; you can redistribute it and/or |
| # modify it under the terms of the GNU Lesser General Public |
| # License as published by the Free Software Foundation; either |
| # version 2.1 of the License, or (at your option) any later version. |
| |
| # The GNU C Library is distributed in the hope that it will be useful, |
| # but WITHOUT ANY WARRANTY; without even the implied warranty of |
| # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| # Lesser General Public License for more details. |
| |
| # You should have received a copy of the GNU Lesser General Public |
| # License along with the GNU C Library; if not, see |
| # <http://www.gnu.org/licenses/>. |
| |
| # |
| # Makefile configuration options for the GNU C library. |
| # |
| ifneq (,) |
| This makefile requires GNU Make. |
| endif |
| |
| all: # Make this the default goal |
| |
| ifneq "$(origin +included-Makeconfig)" "file" |
| |
| +included-Makeconfig := yes |
| |
| ifdef subdir |
| .. := ../ |
| endif |
| |
| # $(common-objdir) is the place to put objects and |
| # such that are not specific to a single subdir. |
| ifdef objdir |
| objpfx := $(patsubst %//,%/,$(objdir)/$(subdir)/) |
| common-objpfx = $(objdir)/ |
| common-objdir = $(objdir) |
| else |
| objdir must be defined by the build-directory Makefile. |
| endif |
| |
| # Root of the sysdeps tree. |
| sysdep_dir := $(..)sysdeps |
| export sysdep_dir := $(sysdep_dir) |
| |
| # Get the values defined by options to `configure'. |
| include $(common-objpfx)config.make |
| |
| # What flags to give to sources which call user provided callbacks |
| uses-callbacks = $(exceptions) |
| |
| # What flags to give to tests which test stack alignment |
| stack-align-test-flags = |
| |
| # Complete path to sysdep dirs. |
| # `configure' writes a definition of `config-sysdirs' in `config.make'. |
| sysdirs := $(foreach D,$(config-sysdirs),$(firstword $(filter /%,$D) $(..)$D)) |
| |
| # Add-ons that contribute sysdeps trees get added to the include list |
| # after sysdeps/generic. This makes #include <sysdeps/...> work right |
| # to find specific add-on files without assuming the add-on directory name. |
| # It also means that headers can go into an add-on's base directory |
| # instead of the add-on needing a sysdeps/generic of its own. |
| sysdeps-srcdirs := $(foreach add-on,$(sysdeps-add-ons),\ |
| $(firstword $(filter /%,$(add-on)) \ |
| $(..)$(add-on))) |
| +sysdep_dirs = $(sysdirs) $(sysdeps-srcdirs) |
| ifdef objdir |
| +sysdep_dirs := $(objdir) $(+sysdep_dirs) |
| endif |
| |
| # Run config.status to update config.make and config.h. We don't show the |
| # dependence of config.h to Make, because it is only touched when it |
| # changes and so config.status would be run every time; the dependence of |
| # config.make should suffice to force regeneration and re-exec, and the new |
| # image will notice if config.h changed. |
| $(common-objpfx)config.make: $(common-objpfx)config.status \ |
| $(..)config.make.in $(..)config.h.in |
| cd $(<D); $(SHELL) $(<F) |
| |
| # Find all the add-on and sysdeps configure fragments, to make sure we |
| # re-run configure when any of them changes. |
| $(common-objpfx)config.status: $(..)version.h $(..)configure \ |
| $(foreach dir,$(sysdirs),\ |
| $(wildcard $(dir)/Implies) \ |
| $(patsubst %.in,%,\ |
| $(firstword $(wildcard \ |
| $(addprefix $(dir)/,configure configure.ac))))) \ |
| $(patsubst %.in,%,\ |
| $(wildcard $(..)sysdeps/*/preconfigure $(..)sysdeps/*/preconfigure.ac)) \ |
| $(patsubst %.in,%,\ |
| $(foreach add-on,$(add-ons),\ |
| $(firstword $(wildcard \ |
| $(addprefix $(firstword $(filter /%,$(add-on)) $(..)$(add-on))/,\ |
| configure configure.ac))) \ |
| $(wildcard $(addprefix $(firstword $(filter /%,$(add-on)) $(..)$(add-on))/,\ |
| sysdeps/*/preconfigure sysdeps/*/preconfigure.ac)))) |
| @cd $(@D); if test -f $(@F); then exec $(SHELL) $(@F) --recheck; else \ |
| echo The GNU C library has not been configured. >&2; \ |
| echo Run \`configure\' to configure it before building. >&2; \ |
| echo Try \`configure --help\' for more details. >&2; \ |
| exit 1; fi |
| |
| # We don't want CPPFLAGS to be exported to the command running configure. |
| unexport CPPFLAGS |
| |
| # Get the user's configuration parameters. |
| ifneq ($(wildcard $(..)configparms),) |
| include $(..)configparms |
| endif |
| ifneq ($(objpfx),) |
| ifneq ($(wildcard $(common-objpfx)configparms),) |
| include $(common-objpfx)configparms |
| endif |
| endif |
| |
| #### |
| #### These are the configuration variables. You can define values for |
| #### the variables below in the file `configparms'. |
| #### Do NOT edit this file. |
| #### |
| |
| |
| # Common prefix for machine-independent installation directories. |
| ifeq ($(origin prefix),undefined) # ifndef would override explicit empty value. |
| prefix = /usr/local |
| endif |
| |
| # Decide whether we shall build the programs or not. We always do this |
| # unless the user tells us (in configparms) or we are building for a |
| # standalone target. |
| ifndef build-programs |
| ifneq ($(config-os),none) |
| build-programs=yes |
| else |
| build-programs=no |
| endif |
| endif |
| |
| # Common prefix for machine-dependent installation directories. |
| ifeq ($(origin exec_prefix),undefined) |
| exec_prefix = $(prefix) |
| endif |
| |
| # Where to install the library and object files. |
| ifndef libdir |
| libdir = $(exec_prefix)/lib |
| endif |
| inst_libdir = $(install_root)$(libdir) |
| |
| # Where to install the shared library. |
| ifndef slibdir |
| slibdir = $(exec_prefix)/lib |
| endif |
| inst_slibdir = $(install_root)$(slibdir) |
| |
| # Where to install the dynamic linker. |
| ifndef rtlddir |
| rtlddir = $(slibdir) |
| endif |
| inst_rtlddir = $(install_root)$(rtlddir) |
| |
| # Prefix to put on files installed in $(libdir). For libraries `libNAME.a', |
| # the prefix is spliced between `lib' and the name, so the linker switch |
| # `-l$(libprefix)NAME' finds the library; for other files the prefix is |
| # just prepended to the whole file name. |
| ifeq ($(origin libprefix),undefined) |
| libprefix = |
| endif |
| |
| # Where to install the header files. |
| ifndef includedir |
| includedir = $(prefix)/include |
| endif |
| inst_includedir = $(install_root)$(includedir) |
| |
| # Where to install machine-independent data files. |
| # These are the timezone database, and the locale database. |
| ifndef datadir |
| datadir = $(prefix)/share |
| endif |
| inst_datadir = $(install_root)$(datadir) |
| |
| # Where to install the timezone data files (which are machine-independent). |
| ifndef zonedir |
| zonedir = $(datadir)/zoneinfo |
| endif |
| inst_zonedir = $(install_root)$(zonedir) |
| |
| # Where to install the locale files. |
| ifndef localedir |
| localedir = $(libdir)/locale |
| endif |
| inst_localedir = $(install_root)$(localedir) |
| |
| # Where to install the message catalog data files (which are |
| # machine-independent). |
| ifndef msgcatdir |
| msgcatdir = $(datadir)/locale |
| endif |
| inst_msgcatdir = $(install_root)$(msgcatdir) |
| |
| # Where to install the locale charmap source files. |
| ifndef i18ndir |
| i18ndir = $(datadir)/i18n |
| endif |
| inst_i18ndir = $(install_root)$(i18ndir) |
| |
| # Where to install the shared object for charset transformation. |
| ifndef gconvdir |
| gconvdir = $(libdir)/gconv |
| endif |
| inst_gconvdir = $(install_root)$(gconvdir) |
| |
| # Where to install programs. |
| ifndef bindir |
| bindir = $(exec_prefix)/bin |
| endif |
| inst_bindir = $(install_root)$(bindir) |
| |
| # Where to install internal programs. |
| ifndef libexecdir |
| libexecdir = $(exec_prefix)/libexec |
| endif |
| inst_libexecdir = $(install_root)$(libexecdir) |
| |
| # Where to install administrative programs. |
| ifndef rootsbindir |
| rootsbindir = $(exec_prefix)/sbin |
| endif |
| inst_rootsbindir = $(install_root)$(rootsbindir) |
| |
| ifndef sbindir |
| sbindir = $(exec_prefix)/sbin |
| endif |
| inst_sbindir = $(install_root)$(sbindir) |
| |
| # Where to install the Info files. |
| ifndef infodir |
| infodir = $(prefix)/info |
| endif |
| inst_infodir = $(install_root)$(infodir) |
| |
| # Where to install audit libraries. |
| ifndef auditdir |
| auditdir = $(libdir)/audit |
| endif |
| inst_auditdir = $(install_root)$(auditdir) |
| |
| # Where to install default configuration files. These include the local |
| # timezone specification and network data base files. |
| ifndef sysconfdir |
| sysconfdir = $(prefix)/etc |
| endif |
| inst_sysconfdir = $(install_root)$(sysconfdir) |
| |
| # Directory for the database files and Makefile for nss_db. |
| ifndef vardbdir |
| vardbdir = $(localstatedir)/db |
| endif |
| inst_vardbdir = $(install_root)$(vardbdir) |
| |
| # Where to install the "localtime" timezone file; this is the file whose |
| # contents $(localtime) specifies. If this is a relative pathname, it is |
| # relative to $(zonedir). It is a good idea to put this somewhere |
| # other than there, so the zoneinfo directory contains only universal data, |
| # localizing the configuration data elsewhere. |
| ifndef localtime-file |
| localtime-file = $(sysconfdir)/localtime |
| endif |
| |
| # What to use for leap second specifications in compiling the default |
| # timezone files. Set this to `/dev/null' for no leap second handling as |
| # 1003.1 requires, or to `leapseconds' for proper leap second handling. |
| # Both zone flavors are always available as `posix/ZONE' and `right/ZONE'. |
| # This variable determines the default: if it's `/dev/null', |
| # ZONE==posix/ZONE; if it's `leapseconds', ZONE==right/ZONE. |
| ifndef leapseconds |
| leapseconds = /dev/null |
| endif |
| |
| # What timezone's DST rules should be used when a POSIX-style TZ |
| # environment variable doesn't specify any rules. For 1003.1 compliance |
| # this timezone must use rules that are as U.S. federal law defines DST. |
| # Run `make -C time echo-zonenames' to see a list of available zone names. |
| # This setting can be changed with `zic -p TIMEZONE' at any time. |
| # If you want POSIX.1 compatibility, use `America/New_York'. |
| ifndef posixrules |
| posixrules = America/New_York |
| endif |
| |
| # Where to install the "posixrules" timezone file; this is file |
| # whose contents $(posixrules) specifies. If this is a relative |
| # pathname, it is relative to $(zonedir). |
| ifndef posixrules-file |
| posixrules-file = posixrules |
| endif |
| |
| |
| # Directory where your system's native header files live. |
| # This is used on Unix systems to generate some GNU libc header files. |
| ifndef sysincludedir |
| sysincludedir = /usr/include |
| endif |
| |
| |
| # Commands to install files. |
| ifndef INSTALL_DATA |
| INSTALL_DATA = $(INSTALL) -m 644 |
| endif |
| ifndef INSTALL_SCRIPT |
| INSTALL_SCRIPT = $(INSTALL) |
| endif |
| ifndef INSTALL_PROGRAM |
| INSTALL_PROGRAM = $(INSTALL) |
| endif |
| ifndef INSTALL |
| INSTALL = install |
| endif |
| |
| |
| # The name of the C compiler. |
| # If you've got GCC, and it works, use it. |
| ifeq ($(origin CC),default) |
| CC := gcc |
| endif |
| |
| # The name of the C compiler to use for compilations of programs to run on |
| # the host that is building the library. If you set CC to a |
| # cross-compiler, you must set this to the normal compiler. |
| ifndef BUILD_CC |
| BUILD_CC = $(CC) |
| endif |
| |
| # Default flags to pass the C compiler. |
| ifndef default_cflags |
| ifeq ($(release),stable) |
| default_cflags := -g -O2 |
| else |
| default_cflags := -g -O |
| endif |
| endif |
| |
| # Flags to pass the C compiler when assembling preprocessed assembly code |
| # (`.S' files). On some systems the assembler doesn't understand the `#' line |
| # directives the preprocessor produces. If you have troubling compiling |
| # assembly code, try using -P here to suppress these directives. |
| ifndef asm-CPPFLAGS |
| asm-CPPFLAGS = |
| endif |
| |
| as-needed := -Wl,--as-needed |
| no-as-needed := -Wl,--no-as-needed |
| |
| # Must be supported by the linker. |
| no-whole-archive = -Wl,--no-whole-archive |
| whole-archive = -Wl,--whole-archive |
| |
| # Installed name of the startup code. |
| # The ELF convention is that the startfile is called crt1.o |
| start-installed-name = crt1.o |
| # On systems that do not need a special startfile for statically linked |
| # binaries, simply set it to the normal name. |
| ifndef static-start-installed-name |
| static-start-installed-name = $(start-installed-name) |
| endif |
| |
| ifeq (yesyes,$(build-shared)$(have-z-combreloc)) |
| combreloc-LDFLAGS = -Wl,-z,combreloc |
| LDFLAGS.so += $(combreloc-LDFLAGS) |
| LDFLAGS-rtld += $(combreloc-LDFLAGS) |
| endif |
| |
| relro-LDFLAGS = -Wl,-z,relro |
| LDFLAGS.so += $(relro-LDFLAGS) |
| LDFLAGS-rtld += $(relro-LDFLAGS) |
| |
| ifeq (yes,$(have-hash-style)) |
| # For the time being we unconditionally use 'both'. At some time we |
| # should declare statically linked code as 'out of luck' and compile |
| # with --hash-style=gnu only. |
| hashstyle-LDFLAGS = -Wl,--hash-style=both |
| LDFLAGS.so += $(hashstyle-LDFLAGS) |
| LDFLAGS-rtld += $(hashstyle-LDFLAGS) |
| endif |
| |
| # Command for linking PIE programs with the C library. |
| ifndef +link-pie |
| +link-pie-before-libc = $(CC) -pie -Wl,-O1 -nostdlib -nostartfiles -o $@ \ |
| $(sysdep-LDFLAGS) $(LDFLAGS) $(LDFLAGS-$(@F)) \ |
| $(combreloc-LDFLAGS) $(relro-LDFLAGS) $(hashstyle-LDFLAGS) \ |
| $(addprefix $(csu-objpfx),S$(start-installed-name)) \ |
| $(+preinit) $(+prectorS) \ |
| $(filter-out $(addprefix $(csu-objpfx),start.o \ |
| S$(start-installed-name))\ |
| $(+preinit) $(link-extra-libs) \ |
| $(common-objpfx)libc% $(+postinit),$^) \ |
| $(link-extra-libs) |
| +link-pie-after-libc = $(+postctorS) $(+postinit) |
| +link-pie = $(+link-pie-before-libc) $(rtld-LDFLAGS) $(link-libc) \ |
| $(+link-pie-after-libc) |
| +link-pie-tests = $(+link-pie-before-libc) $(rtld-tests-LDFLAGS) \ |
| $(link-libc-tests) $(+link-pie-after-libc) |
| endif |
| # Command for statically linking programs with the C library. |
| ifndef +link-static |
| +link-static-before-libc = $(CC) -nostdlib -nostartfiles -static -o $@ \ |
| $(sysdep-LDFLAGS) $(LDFLAGS) $(LDFLAGS-$(@F)) \ |
| $(addprefix $(csu-objpfx),$(static-start-installed-name)) \ |
| $(+preinit) $(+prectorT) \ |
| $(filter-out $(addprefix $(csu-objpfx),start.o \ |
| $(start-installed-name))\ |
| $(+preinit) $(link-extra-libs-static) \ |
| $(common-objpfx)libc% $(+postinit),$^) \ |
| $(link-extra-libs-static) |
| +link-static-after-libc = $(+postctorT) $(+postinit) |
| +link-static = $(+link-static-before-libc) $(link-libc-static) \ |
| $(+link-static-after-libc) |
| +link-static-tests = $(+link-static-before-libc) $(link-libc-static-tests) \ |
| $(+link-static-after-libc) |
| endif |
| # Commands for linking programs with the C library. |
| ifndef +link |
| ifeq (yes,$(build-shared)) |
| +link-before-libc = $(CC) -nostdlib -nostartfiles -o $@ \ |
| $(sysdep-LDFLAGS) $(LDFLAGS) $(LDFLAGS-$(@F)) \ |
| $(combreloc-LDFLAGS) $(relro-LDFLAGS) $(hashstyle-LDFLAGS) \ |
| $(addprefix $(csu-objpfx),$(start-installed-name)) \ |
| $(+preinit) $(+prector) \ |
| $(filter-out $(addprefix $(csu-objpfx),start.o \ |
| $(start-installed-name))\ |
| $(+preinit) $(link-extra-libs) \ |
| $(common-objpfx)libc% $(+postinit),$^) \ |
| $(link-extra-libs) |
| +link-after-libc = $(+postctor) $(+postinit) |
| +link = $(+link-before-libc) $(rtld-LDFLAGS) $(link-libc) \ |
| $(+link-after-libc) |
| +link-tests = $(+link-before-libc) $(rtld-tests-LDFLAGS) \ |
| $(link-libc-tests) $(+link-after-libc) |
| else |
| +link = $(+link-static) |
| +link-tests = $(+link-static-tests) |
| endif |
| endif |
| ifeq (yes,$(build-shared)) |
| ifndef rtld-LDFLAGS |
| rtld-LDFLAGS = -Wl,-dynamic-linker=$(rtlddir)/$(rtld-installed-name) |
| endif |
| ifndef rtld-tests-LDFLAGS |
| ifeq (yes,$(build-hardcoded-path-in-tests)) |
| rtld-tests-LDFLAGS = -Wl,-dynamic-linker=$(common-objpfx)elf/ld.so |
| else |
| rtld-tests-LDFLAGS = $(rtld-LDFLAGS) |
| endif |
| endif |
| endif |
| ifndef link-libc |
| ifeq (yes,$(build-shared)) |
| # We need the versioned name of libc.so in the deps of $(others) et al |
| # so that the symlink to libc.so is created before anything tries to |
| # run the linked programs. |
| link-libc-rpath-link = -Wl,-rpath-link=$(rpath-link) |
| ifeq (yes,$(build-hardcoded-path-in-tests)) |
| link-libc-tests-rpath-link = -Wl,-rpath=$(rpath-link) |
| else |
| link-libc-tests-rpath-link = $(link-libc-rpath-link) |
| endif |
| link-libc-before-gnulib = $(common-objpfx)libc.so$(libc.so-version) \ |
| $(common-objpfx)$(patsubst %,$(libtype.oS),c) \ |
| $(as-needed) $(common-objpfx)elf/ld.so \ |
| $(no-as-needed) |
| link-libc = $(link-libc-rpath-link) $(link-libc-before-gnulib) $(gnulib) |
| link-libc-tests = $(link-libc-tests-rpath-link) \ |
| $(link-libc-before-gnulib) $(gnulib-tests) |
| # This is how to find at build-time things that will be installed there. |
| rpath-dirs = math elf dlfcn nss nis rt resolv crypt |
| rpath-link = \ |
| $(common-objdir):$(subst $(empty) ,:,$(patsubst ../$(subdir),.,$(rpath-dirs:%=$(common-objpfx)%))) |
| else |
| link-libc = $(common-objpfx)libc.a $(otherlibs) $(gnulib) $(common-objpfx)libc.a $(gnulib) |
| link-libc-tests = $(common-objpfx)libc.a $(otherlibs) $(gnulib-tests) $(common-objpfx)libc.a $(gnulib-tests) |
| endif |
| endif |
| |
| elfobjdir := $(patsubst ../$(subdir),.,$(common-objpfx)elf) |
| |
| # Differences in the linkers on the various platforms. |
| LDFLAGS-rpath-ORIGIN = -Wl,-rpath,'$$ORIGIN' |
| LDFLAGS-soname-fname = -Wl,-soname,$(@F) |
| LDFLAGS-rdynamic = -rdynamic |
| LDFLAGS-Bsymbolic = -Bsymbolic |
| |
| # Choose the default search path for the dynamic linker based on |
| # where we will install libraries. |
| ifneq ($(libdir),$(slibdir)) |
| default-rpath = $(slibdir):$(libdir) |
| else |
| default-rpath = $(libdir) |
| endif |
| |
| ifndef link-extra-libs |
| link-extra-libs = $(LDLIBS-$(@F)) |
| link-extra-libs-static = $(link-extra-libs) |
| endif |
| |
| # The static libraries. |
| link-libc-static = -Wl,--start-group $(common-objpfx)libc.a $(static-gnulib) -Wl,--end-group |
| link-libc-static-tests = -Wl,--start-group $(common-objpfx)libc.a $(static-gnulib-tests) -Wl,--end-group |
| |
| # How to link against libgcc. Some libgcc functions, such as those |
| # for "long long" arithmetic or software floating point, can always be |
| # built without use of C library headers and do not have any global |
| # state so can safely be linked statically into any executable or |
| # shared library requiring them; these functions are in libgcc.a. |
| # Other functions, relating to exception handling, may require C |
| # library headers to build and it may not be safe to have more than |
| # one copy of them in a process; these functions are only in |
| # libgcc_s.so and libgcc_eh.a. |
| # |
| # To avoid circular dependencies when bootstrapping, it is desirable |
| # to avoid use of libgcc_s and libgcc_eh in building glibc. Where any |
| # glibc functionality (in particular, thread cancellation) requires |
| # exception handling, this is implemented through dlopen of libgcc_s |
| # to avoid unnecessary dependencies on libgcc_s by programs not using |
| # that functionality; executables built with glibc do not use |
| # exception handling other than through thread cancellation. |
| # |
| # Undefined references to functions from libgcc_eh or libgcc_s may |
| # arise for code built with -fexceptions. In the case of statically |
| # linked programs installed by glibc, unwinding will never actually |
| # occur at runtime and the use of elf/static-stubs.c to resolve these |
| # references is safe. In the case of statically linked test programs |
| # and test programs built with -fexceptions, unwinding may occur in |
| # some cases and it is preferable to link with libgcc_eh or libgcc_s |
| # so that the testing is as similar as possible to how programs will |
| # be built with the installed glibc. |
| # |
| # Some architectures have architecture-specific systems for exception |
| # handling that may involve undefined references to |
| # architecture-specific functions. On those architectures, |
| # gnulib-arch and static-gnulib-arch may be defined in sysdeps |
| # makefiles to use additional libraries for linking executables and |
| # shared libraries built by glibc. |
| ifndef gnulib |
| ifneq ($(have-cc-with-libunwind),yes) |
| libunwind = |
| else |
| libunwind = -lunwind |
| endif |
| libgcc_eh := -Wl,--as-needed -lgcc_s $(libunwind) -Wl,--no-as-needed |
| gnulib-arch = |
| gnulib = -lgcc $(gnulib-arch) |
| gnulib-tests := -lgcc $(libgcc_eh) |
| static-gnulib-arch = |
| # By default, elf/static-stubs.o, instead of -lgcc_eh, is used to |
| # statically link programs. When --disable-shared is used, we use |
| # -lgcc_eh since elf/static-stubs.o isn't sufficient. |
| ifeq (yes,$(build-shared)) |
| static-gnulib = -lgcc $(static-gnulib-arch) |
| else |
| static-gnulib = -lgcc -lgcc_eh $(static-gnulib-arch) |
| endif |
| static-gnulib-tests := -lgcc -lgcc_eh $(libunwind) |
| libc.so-gnulib := -lgcc |
| endif |
| +preinit = $(addprefix $(csu-objpfx),crti.o) |
| +postinit = $(addprefix $(csu-objpfx),crtn.o) |
| +prector = `$(CC) $(sysdep-LDFLAGS) --print-file-name=crtbegin.o` |
| +postctor = `$(CC) $(sysdep-LDFLAGS) --print-file-name=crtend.o` |
| # Variants of the two previous definitions for linking PIE programs. |
| +prectorS = `$(CC) $(sysdep-LDFLAGS) --print-file-name=crtbeginS.o` |
| +postctorS = `$(CC) $(sysdep-LDFLAGS) --print-file-name=crtendS.o` |
| # Variants of the two previous definitions for statically linking programs. |
| +prectorT = `$(CC) $(sysdep-LDFLAGS) --print-file-name=crtbeginT.o` |
| +postctorT = `$(CC) $(sysdep-LDFLAGS) --print-file-name=crtend.o` |
| +interp = $(addprefix $(elf-objpfx),interp.os) |
| csu-objpfx = $(common-objpfx)csu/ |
| elf-objpfx = $(common-objpfx)elf/ |
| |
| # A command that, prepended to the name and arguments of a program, |
| # and run on the build system, causes that program with those |
| # arguments to be run on the host for which the library is built. |
| ifndef test-wrapper |
| test-wrapper = |
| endif |
| # Likewise, but the name of the program is preceded by |
| # <variable>=<value> assignments for environment variables. |
| ifndef test-wrapper-env |
| test-wrapper-env = $(test-wrapper) env |
| endif |
| |
| # Whether to run test programs built for the library's host system. |
| ifndef run-built-tests |
| ifeq (yes|,$(cross-compiling)|$(test-wrapper)) |
| run-built-tests = no |
| else |
| run-built-tests = yes |
| endif |
| endif |
| |
| # How to run a program we just linked with our library. |
| # The program binary is assumed to be $(word 2,$^). |
| built-program-file = $(dir $(word 2,$^))$(notdir $(word 2,$^)) |
| rtld-prefix = $(elf-objpfx)$(rtld-installed-name) \ |
| --library-path \ |
| $(rpath-link)$(patsubst %,:%,$(sysdep-library-path)) |
| ifeq (yes,$(build-shared)) |
| comma = , |
| sysdep-library-path = \ |
| $(subst $(empty) ,:,$(strip $(patsubst -Wl$(comma)-rpath-link=%, %,\ |
| $(filter -Wl$(comma)-rpath-link=%,\ |
| $(sysdep-LDFLAGS))))) |
| # $(run-via-rtld-prefix) is a command that, when prepended to the name |
| # of a program built with the newly built library, produces a command |
| # that, executed on the host for which the library is built, runs that |
| # program. For tests listed in tests-static or xtests-static, it is |
| # empty. |
| run-via-rtld-prefix = \ |
| $(if $(strip $(filter $(notdir $(built-program-file)), \ |
| $(tests-static) $(xtests-static))),, $(rtld-prefix)) |
| else |
| run-via-rtld-prefix = |
| endif |
| # $(run-program-prefix) is a command that, when prepended to the name |
| # of a program built with the newly built library, produces a command |
| # that, executed on the build system on which "make" is run, runs that |
| # program. |
| run-program-prefix = $(test-wrapper) $(run-via-rtld-prefix) |
| # $(built-program-cmd) is a command that, executed on the build system |
| # on which "make" is run, runs the newly built program that is the |
| # second dependency of the makefile target in which |
| # $(built-program-cmd) is used. |
| built-program-cmd = $(test-wrapper) \ |
| $(run-via-rtld-prefix) $(built-program-file) |
| # $(host-built-program-cmd) is a command that, executed on the host |
| # for which the library is built, runs the newly built program that is |
| # the second dependency of the makefile target in which |
| # $(host-built-program-cmd) is used. |
| host-built-program-cmd = $(run-via-rtld-prefix) $(built-program-file) |
| |
| ifndef LD |
| LD := ld -X |
| endif |
| |
| # $(test-via-rtld-prefix) is a command that, when prepended to the name |
| # of a test program built with the newly built library, produces a command |
| # that, executed on the host for which the library is built, runs that |
| # program. For tests listed in tests-static or xtests-static as well |
| # as when test programs are hardcoded to the newly built libraries, it |
| # is empty. |
| |
| # $(test-program-prefix) is a command that, when prepended to the name |
| # of a test program built with the newly built library, produces a command |
| # that, executed on the build system on which "make" is run, runs that |
| # test program. |
| |
| # $(test-program-cmd) is a command that, executed on the build system |
| # on which "make" is run, runs the newly built test program that is the |
| # second dependency of the makefile target in which |
| # $(test-program-cmd) is used. |
| |
| # $(host-test-program-cmd) is a command that, executed on the host |
| # for which the library is built, runs the newly built test program that |
| # is the second dependency of the makefile target in which |
| # $(host-test-program-cmd) is used. |
| |
| ifeq (yes,$(build-hardcoded-path-in-tests)) |
| test-via-rtld-prefix = |
| test-program-prefix = $(test-wrapper) |
| test-program-cmd = $(test-wrapper) $(built-program-file) |
| host-test-program-cmd = $(built-program-file) |
| else |
| test-via-rtld-prefix = $(run-via-rtld-prefix) |
| test-program-prefix = $(run-program-prefix) |
| test-program-cmd = $(built-program-cmd) |
| host-test-program-cmd = $(host-built-program-cmd) |
| endif |
| |
| # Extra flags to pass to GCC. |
| ifeq ($(all-warnings),yes) |
| +gccwarn := -Wall -Wwrite-strings -Winline -Wcast-qual -Wbad-function-cast -Wmissing-noreturn -Wmissing-prototypes -Wmissing-declarations -Wcomment -Wcomments -Wtrigraphs -Wsign-compare -Wfloat-equal -Wmultichar |
| else |
| +gccwarn := -Wall -Wwrite-strings -Winline |
| endif |
| +gccwarn-c = -Wstrict-prototypes |
| |
| # We do not depend on the address of constants in different files to be |
| # actually different, so allow the compiler to merge them all. |
| +merge-constants = -fmerge-all-constants |
| |
| # We have to assume that glibc functions are called in any rounding |
| # mode and also change the rounding mode in a few functions. So, |
| # disable any optimization that assume default rounding mode. |
| +math-flags = -frounding-math |
| |
| # This is the program that generates makefile dependencies from C source files. |
| # The -MP flag tells GCC >= 3.2 (which we now require) to produce dummy |
| # targets for headers so that removed headers don't break the build. |
| ifndef +mkdep |
| +mkdep = $(CC) -M -MP |
| endif |
| |
| # The program that makes Emacs-style TAGS files. |
| ETAGS := etags |
| |
| # The `xgettext' program for producing .pot files from sources. |
| ifndef XGETTEXT |
| XGETTEXT = xgettext |
| endif |
| |
| # The `m4' macro processor; this is used by sysdeps/sparc/Makefile (and |
| # perhaps others) to preprocess assembly code in some cases. |
| M4 = m4 |
| |
| # To force installation of files even if they are older than the |
| # installed files. This variable is included in the dependency list |
| # of all installation targets. |
| ifeq ($(force-install),yes) |
| +force = force-install |
| else |
| +force = |
| endif |
| |
| #### |
| #### End of configuration variables. |
| #### |
| |
| # This tells some versions of GNU make before 3.63 not to export all variables. |
| .NOEXPORT: |
| |
| # We want to echo the commands we're running without |
| # umpteen zillion filenames along with it (we use `...' instead) |
| # but we don't want this echoing done when the user has said |
| # he doesn't want to see commands echoed by using -s. |
| ifneq "$(findstring s,$(MAKEFLAGS))" "" # if -s |
| +cmdecho := echo >/dev/null |
| else # not -s |
| +cmdecho := echo |
| endif # -s |
| |
| # These are the flags given to the compiler to tell |
| # it what sort of optimization and/or debugging output to do. |
| ifndef +cflags |
| # If `CFLAGS' was defined, use that. |
| ifdef CFLAGS |
| +cflags := $(filter-out -I%,$(CFLAGS)) |
| endif # CFLAGS |
| endif # +cflags |
| |
| # If none of the above worked, default to "-g -O". |
| ifeq "$(strip $(+cflags))" "" |
| +cflags := $(default_cflags) |
| endif # $(+cflags) == "" |
| |
| +cflags += $(cflags-cpu) $(+gccwarn) $(+merge-constants) $(+math-flags) |
| +gcc-nowarn := -w |
| |
| # Don't duplicate options if we inherited variables from the parent. |
| +cflags := $(sort $(+cflags)) |
| |
| # Each sysdeps directory can contain header files that both will be |
| # used to compile and will be installed. Each can also contain an |
| # include/ subdirectory, whose header files will be used to compile |
| # but will not be installed, and will take precedence over the |
| # installed files. This mirrors the top-level include/ subdirectory. |
| +sysdep-includes := $(foreach dir,$(+sysdep_dirs),\ |
| $(addprefix -I,$(wildcard $(dir)/include) $(dir))) |
| |
| # These are flags given to the C compiler to tell it to look for |
| # include files (including ones given in angle brackets) in the parent |
| # library source directory, in the include directory, and in the |
| # current directory. |
| +includes = -I$(..)include $(if $(subdir),$(objpfx:%/=-I%)) \ |
| $(+sysdep-includes) $(includes) \ |
| $(patsubst %/,-I%,$(..)) $(libio-include) -I. $(sysincludes) |
| |
| # Since libio has several internal header files, we use a -I instead |
| # of many little headers in the include directory. |
| libio-include = -I$(..)libio |
| |
| # These are the variables that the implicit compilation rules use. |
| # Note that we can't use -std=* in CPPFLAGS, because it overrides |
| # the implicit -lang-asm and breaks cpp behavior for .S files--notably |
| # it causes cpp to stop predefining __ASSEMBLER__. |
| CPPFLAGS = $(CPPUNDEFS) $(CPPFLAGS-config) $($(subdir)-CPPFLAGS) \ |
| $(+includes) $(defines) \ |
| -include $(..)include/libc-symbols.h $(sysdep-CPPFLAGS) \ |
| $(CPPFLAGS-$(suffix $@)) \ |
| $(foreach lib,$(libof-$(basename $(@F))) \ |
| $(libof-$(<F)) $(libof-$(@F)),$(CPPFLAGS-$(lib))) \ |
| $(CPPFLAGS-$(<F)) $(CPPFLAGS-$(@F)) $(CPPFLAGS-$(basename $(@F))) |
| override CFLAGS = -std=gnu99 $(gnu89-inline-CFLAGS) $(config-extra-cflags) \ |
| $(filter-out %frame-pointer,$(+cflags)) $(+gccwarn-c) \ |
| $(sysdep-CFLAGS) $(CFLAGS-$(suffix $@)) $(CFLAGS-$(<F)) \ |
| $(CFLAGS-$(@F)) \ |
| $(foreach lib,$(libof-$(basename $(@F))) \ |
| $(libof-$(<F)) $(libof-$(@F)),$(CFLAGS-$(lib))) |
| override CXXFLAGS = $(c++-sysincludes) \ |
| $(filter-out %frame-pointer,$(+cflags)) $(sysdep-CFLAGS) \ |
| $(CFLAGS-$(suffix $@)) $(CFLAGS-$(<F)) $(CFLAGS-$(@F)) |
| |
| # If everything is compiled with -fPIC (implicitly) we must tell this by |
| # defining the PIC symbol. |
| ifeq (yes,$(build-pic-default)) |
| pic-default = -DPIC |
| endif |
| |
| # Enable object files for different versions of the library. |
| # Various things use $(object-suffixes) to know what all to make. |
| # The compilation rules use $(CPPFLAGS-${SUFFIX}) and $(CFLAGS-${SUFFIX}) |
| # to pass different flags for each flavor. |
| libtypes = $(foreach o,$(object-suffixes-for-libc),$(libtype$o)) |
| all-object-suffixes := .o .os .op .og .oS |
| object-suffixes := |
| CPPFLAGS-.o = $(pic-default) |
| CFLAGS-.o = $(filter %frame-pointer,$(+cflags)) |
| libtype.o := lib%.a |
| object-suffixes += .o |
| ifeq (yes,$(build-shared)) |
| # Under --enable-shared, we will build a shared library of PIC objects. |
| # The PIC object files are named foo.os. |
| object-suffixes += .os |
| CPPFLAGS-.os = -DPIC -DSHARED |
| CFLAGS-.os = $(filter %frame-pointer,$(+cflags)) $(pic-ccflag) |
| libtype.os := lib%_pic.a |
| # This can be changed by a sysdep makefile |
| pic-ccflag = -fPIC |
| # This one should always stay like this unless there is a very good reason. |
| PIC-ccflag = -fPIC |
| endif |
| # This can be changed by a sysdep makefile |
| pie-ccflag = -fpie |
| # This one should always stay like this unless there is a very good reason. |
| PIE-ccflag = -fPIE |
| ifeq (yes,$(build-profile)) |
| # Under --enable-profile, we will build a static library of profiled objects. |
| # The profiled object files are named foo.op. |
| object-suffixes += .op |
| CPPFLAGS-.op = -DPROF $(pic-default) |
| CFLAGS-.op = -pg |
| libtype.op = lib%_p.a |
| endif |
| |
| # Convenience variable for when we want to treat shared-library cases |
| # differently from the rest. |
| object-suffixes-noshared := $(filter-out .os,$(object-suffixes)) |
| |
| object-suffixes-for-libc := $(object-suffixes) |
| |
| ifeq (yes,$(build-shared)) |
| # Build special library that contains the static-only routines for libc. |
| object-suffixes-for-libc += .oS |
| |
| # Must build the routines as PIC, though, because they can end up in (users') |
| # shared objects. We don't want to use CFLAGS-os because users may, for |
| # example, make that processor-specific. |
| CFLAGS-.oS = $(CFLAGS-.o) $(PIC-ccflag) |
| CPPFLAGS-.oS = $(CPPFLAGS-.o) -DPIC -DLIBC_NONSHARED=1 |
| libtype.oS = lib%_nonshared.a |
| endif |
| |
| # The assembler can generate debug information too. |
| ifndef ASFLAGS |
| ASFLAGS := $(filter -g% -fdebug-prefix-map=%,$(CFLAGS)) |
| endif |
| ASFLAGS += $(ASFLAGS-config) $(asflags-cpu) |
| |
| ifndef BUILD_CC |
| BUILD_CC = $(CC) |
| endif |
| |
| move-if-change = $(SHELL) $(..)scripts/move-if-change |
| |
| -include $(common-objpfx)sysd-sorted |
| subdirs = $(sorted-subdirs) |
| subdir-srcdirs = $(foreach dir,$(subdirs),\ |
| $(firstword $($(dir)-srcdir) $(..)$(dir))) |
| |
| # This is a pair of implicit rules to preprocess a file with # comments, |
| # %ifdef et al, based on config.h settings or other %include'd files. |
| # We use chained rules instead of a pipeline here so that we can properly |
| # check the exit status of cpp rather than using its bad output when there |
| # is a preprocessing error. Another rule should depend on the output file |
| # `FOO.v', and along with that `FOO.v.i' should be given dependencies |
| # listing both its input files, and any header files that it may reference |
| # (but no commands). |
| %.v.i: $(common-objpfx)config.h $(..)Makeconfig |
| sed '/^[ ]*%/!s/#.*$$//;/^[ ]*$$/d;s/^[ ]*%/#/' \ |
| $(filter-out FORCE %.h $(..)Makeconfig,$^) \ |
| | $(CC) -E -undef $(CPPFLAGS) -x assembler-with-cpp - \ |
| > $@T |
| mv -f $@T $@ |
| %.v: %.v.i |
| sed '/^[ ]*#/d;/^[ ]*$$/d' $< > $@T |
| mv -f $@T $@ |
| |
| ifeq (yes, $(build-shared)) |
| |
| # To generate a header to support more than one ABI for different |
| # architecture variants, the CPU/Makefile defines abi-variants to be a |
| # list of names for those variants (e.g. 32 64), and, for each variant, |
| # defines abi-$(variant)-condition to be the condition for those options |
| # to use in a C #if condition. abi-includes may be defined to a list of |
| # headers to include in the generated header, if the default does not |
| # suffice. default-abi is defined to be the ABI for the current glibc |
| # build. |
| |
| ifndef abi-includes |
| abi-includes := bits/wordsize.h |
| endif |
| |
| # Process the shlib-versions file, which tells us what shared library |
| # version numbers to use when we install shared objects on this system. |
| # We need to wait until $(subdirs) is complete. |
| ifeq ($(sysd-sorted-done),t) |
| -include $(common-objpfx)soversions.mk |
| ifndef avoid-generated |
| # This lets add-ons give more-specific matches that override defaults |
| # in the top-level file. |
| $(common-objpfx)shlib-versions.v.i: \ |
| $(wildcard $(+sysdep_dirs:=/shlib-versions) \ |
| $(subdir-srcdirs:=/shlib-versions)) \ |
| $(..)shlib-versions |
| |
| soversions-default-setname = $(patsubst %, %,\ |
| $(filter-out %_default,\ |
| $(oldest-abi:%=GLIBC_%))) |
| $(common-objpfx)soversions.i: $(..)scripts/soversions.awk \ |
| $(common-objpfx)shlib-versions.v |
| $(AWK) -v default_setname='$(soversions-default-setname)' \ |
| -v cpu='$(config-machine)' \ |
| -v vendor='$(config-vendor)' \ |
| -v os='$(config-os)' \ |
| -f $^ > $@T |
| mv -f $@T $@ |
| $(common-objpfx)soversions.mk: $(common-objpfx)soversions.i $(..)Makeconfig |
| (while read which lib number setname; do \ |
| eval seen_$$which=1; \ |
| test x"$$which" != xABI || echo abi-name = "$$lib"; \ |
| test x"$$which" = xDEFAULT || continue; \ |
| case $$number in \ |
| [0-9]*) echo "$$lib.so-version=.$$number"; \ |
| echo "all-sonames+=$$lib=$$lib.so\$$($$lib.so-version)";;\ |
| *) echo "$$lib.so-version=\$$(if \$$(abi-$(default-abi)-$$lib-soname),\$$(abi-$(default-abi)-$$lib-soname),$$number)"; \ |
| echo "all-sonames+=$$lib=\$$($$lib.so-version)";;\ |
| esac; \ |
| done; \ |
| echo soversions.mk-done = t;) < $< > $@T; exit 0 |
| mv -f $@T $@ |
| endif |
| endif |
| |
| postclean-generated += soversions.mk soversions.i \ |
| shlib-versions.v shlib-versions.v.i |
| |
| # Generate the header containing the names of all shared libraries. |
| # We use a stamp file to avoid unnecessary recompilations. |
| before-compile += $(common-objpfx)gnu/lib-names.h |
| ifeq ($(soversions.mk-done),t) |
| $(common-objpfx)gnu/lib-names.h: $(common-objpfx)gnu/lib-names.stmp; @: |
| $(common-objpfx)gnu/lib-names.stmp: $(..)scripts/lib-names.awk \ |
| $(common-objpfx)soversions.i |
| $(make-target-directory) |
| { \ |
| echo '/* This file is automatically generated.';\ |
| echo ' It defines macros to allow user program to find the shared'; \ |
| echo ' library files which come as part of GNU libc. */'; \ |
| echo '#ifndef __GNU_LIB_NAMES_H'; \ |
| echo '#define __GNU_LIB_NAMES_H 1'; \ |
| echo ''; \ |
| $(if $(abi-includes), \ |
| $(foreach h,$(abi-includes), echo '#include <$(h)>';) \ |
| echo '';) \ |
| $(if $(abi-variants), \ |
| $(foreach v,$(abi-variants),\ |
| $(if $(abi-$(v)-condition),\ |
| echo '#if $(abi-$(v)-condition)'; \ |
| ($(foreach s,$(all-sonames), \ |
| $(if $(abi-$(v)-$(firstword $(subst =, ,$(s)))-soname),\ |
| echo $(firstword $(subst =, ,$(s)))=$(abi-$(v)-$(firstword $(subst =, ,$(s)))-soname);, \ |
| echo $(s);))) \ |
| | LC_ALL=C $(AWK) -v multi=1 -f $(firstword $^) | LC_ALL=C sort;) \ |
| $(if $(abi-$(v)-condition),echo '#endif';)), \ |
| ($(foreach s,$(all-sonames), echo $(s);)) \ |
| | LC_ALL=C $(AWK) -f $(firstword $^) | LC_ALL=C sort;) \ |
| echo ''; \ |
| echo '#endif /* gnu/lib-names.h */'; \ |
| } > ${@:stmp=T} |
| $(move-if-change) ${@:stmp=T} ${@:stmp=h} |
| touch $@ |
| endif |
| |
| common-generated += gnu/lib-names.h gnu/lib-names.stmp |
| |
| # The name under which the run-time dynamic linker is installed. |
| # We are currently going for the convention that `/lib/ld.so.1' |
| # names the SVR4/ELF ABI-compliant dynamic linker. |
| ifndef rtld-installed-name |
| ifdef ld.so-version |
| rtld-installed-name = $(ld.so-version) |
| else |
| rtld-installed-name = ld.so.1 |
| endif |
| endif |
| |
| ifndef rtld-version-installed-name |
| rtld-version-installed-name = ld-$(version).so |
| endif |
| |
| endif # build-shared |
| |
| |
| ifeq ($(build-shared),yes) |
| libdl = $(common-objpfx)dlfcn/libdl.so$(libdl.so-version) |
| else |
| libdl = $(common-objpfx)dlfcn/libdl.a |
| endif |
| |
| ifeq ($(build-shared),yes) |
| libm = $(common-objpfx)math/libm.so$(libm.so-version) |
| else |
| libm = $(common-objpfx)math/libm.a |
| endif |
| |
| # These are the subdirectories containing the library source. The order |
| # is more or less arbitrary. The sorting step will take care of the |
| # dependencies. |
| all-subdirs = csu assert ctype locale intl catgets math setjmp signal \ |
| stdlib stdio-common libio malloc string wcsmbs time dirent \ |
| grp pwd posix io termios resource misc socket sysvipc gmon \ |
| gnulib iconv iconvdata wctype manual shadow gshadow po argp \ |
| crypt localedata timezone rt conform debug \ |
| $(add-on-subdirs) dlfcn elf |
| |
| ifndef avoid-generated |
| # sysd-sorted itself will contain rules making the sysd-sorted target |
| # depend on Depend files. But if you just added a Depend file to an |
| # existing directory not in all-subdirs, then sysd-sorted needs to |
| # be regenerated, so it depends on existing $(sorted-subdirs:=/Depend) files. |
| all-Depend-files := $(wildcard $(sort \ |
| $(foreach dir,$(all-subdirs),\ |
| $(firstword $($(dir)-srcdir) \ |
| $(..)$(dir))/Depend) \ |
| $(sorted-subdirs:=/Depend))) |
| $(common-objpfx)sysd-sorted: $(..)scripts/gen-sorted.awk \ |
| $(common-objpfx)config.make $(..)Makeconfig \ |
| $(wildcard $(sysdirs:=/Subdirs)) \ |
| $(all-Depend-files) |
| $(AWK) -f $< \ |
| -v subdirs='$(all-subdirs)' \ |
| -v srcpfx='$(..)' \ |
| $(filter %/Subdirs %/Depend,$^) > $@-tmp |
| mv -f $@-tmp $@ |
| $(all-Depend-files): ; |
| endif |
| |
| # This gives partial TARGET:SOURCE pattern pairs to have rules |
| # emitted into sysd-rules. A sysdeps Makeconfig fragment can |
| # add its own special object file prefix to this list with e.g. foo-%:% |
| # to have foo-*.? compiled from *.? using $(foo-CPPFLAGS). |
| sysd-rules-patterns := %:% rtld-%:rtld-% rtld-%:% m_%:s_% |
| |
| # Let sysdeps/ subdirs contain a Makeconfig fragment for us to include here. |
| sysdep-makeconfigs := $(wildcard $(+sysdep_dirs:=/Makeconfig)) |
| ifneq (,$(sysdep-makeconfigs)) |
| include $(sysdep-makeconfigs) |
| endif |
| |
| # Compute just the target patterns. Makeconfig has set sysd-rules-patterns. |
| sysd-rules-targets := $(sort $(foreach p,$(sysd-rules-patterns),\ |
| $(firstword $(subst :, ,$p)))) |
| |
| # A sysdeps Makeconfig fragment may set libc-reentrant to yes. |
| ifeq (yes,$(libc-reentrant)) |
| defines += -D_LIBC_REENTRANT |
| |
| libio-mtsafe = -D_IO_MTSAFE_IO |
| endif |
| |
| endif # Makeconfig not yet included |
| |
| # Local Variables: |
| # mode: makefile |
| # End: |
