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glibc/sysdeps/unix/Makefile
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# Copyright (C) 1991,1992,1993,1994,1995,1996,1997,1998,1999,2003,2006,2008,2009 | |
# 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, write to the Free | |
# Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA | |
# 02111-1307 USA. | |
# The unix-specific configure fragment writes `unix-generated' in config.make. | |
config-generated := $(config-generated) $(unix-generated) | |
ifeq (,$(filter-out $(sysdep_dir)/generic/ $(common-objpfx),\ | |
$(dir $(firstword $(wildcard $(+sysdep_dirs:%=%/bits/local_lim.h)))))) | |
ifneq (,$(wildcard $(sysincludedir)/sys/param.h)) | |
mk-local_lim-CFLAGS += -DHAVE_SYS_PARAM_H | |
endif | |
ifneq (,$(wildcard $(sysincludedir)/sys/limits.h)) | |
mk-local_lim-CFLAGS += -DHAVE_SYS_LIMITS_H | |
endif | |
ifneq (,$(wildcard $(sysincludedir)/limits.h)) | |
mk-local_lim-CFLAGS += -DHAVE_LIMITS_H | |
endif | |
$(common-objpfx)bits/local_lim.h: $(common-objpfx)mk-local_lim | |
$(dir $<)$(notdir $<) > $@-t | |
mv -f $@-t $@ | |
$(common-objpfx)mk-local_lim: $(sysdep_dir)/unix/mk-local_lim.c | |
$(common-objdir-compile) | |
before-compile += $(common-objpfx)bits/local_lim.h | |
common-generated += bits/local_lim.h mk-local_lim | |
endif | |
ifeq (,$(filter-out $(sysdep_dir)/generic/ $(common-objpfx),\ | |
$(patsubst %/sys/param.h,%/,\ | |
$(firstword $(wildcard $(+sysdep_dirs:%=%/sys/param.h)))))) | |
before-compile := $(before-compile) $(common-objpfx)sys/param.h | |
$(common-objpfx)sys/param.h: $(sysincludedir)/sys/param.h | |
$(make-target-directory) | |
(echo '#ifndef _SYS_PARAM_H'; \ | |
echo '#define _SYS_PARAM_H 1'; \ | |
echo '#include <endian.h>'; \ | |
$(AWK) < $< \ | |
'/^#define[ ]*NULL/ { print "#ifndef NULL"; \ | |
print $$0; \ | |
print "#endif"; \ | |
was_null = 1 } \ | |
{ if (!was_null) print $$0; \ | |
was_null = 0 }'; \ | |
echo '#ifndef MAXHOSTNAMELEN'; \ | |
echo '#define MAXHOSTNAMELEN 64 /* XXX */'; \ | |
echo '#endif /* No MAXHOSTNAMELEN. */'; \ | |
echo '#endif /* sys/param.h */') > $@-tmp | |
mv $@-tmp $@ | |
$(common-objpfx)param.h.c: $(sysincludedir)/sys/param.h | |
rm -f $@ | |
cp $< $@ | |
$(common-objpfx)param.h.dep: $(common-objpfx)param.h.c \ | |
$(sysdep_dir)/unix/Makefile | |
$(+mkdep) -I$(sysincludedir) $< \ | |
| sed > $@-t \ | |
-e 's@$(sysincludedir)/sys/param.h@@' \ | |
-e 's@^.*:@@' \ | |
-e 's@$<@@g' \ | |
-e 's@$(sysincludedir)/*@@g' \ | |
-e 's@\\$$@@' \ | |
-e 's@^@sys/param.h-includes := $$(sys/param.h-includes) @' | |
mv $@-t $@ | |
# Get the generated definition of sys/param.h-includes. | |
ifndef no_deps | |
-include $(common-objpfx)param.h.dep | |
endif | |
# Don't preempt our own headers. | |
sys/param.h-includes := \ | |
$(filter-out $(patsubst $(..)%,%,\ | |
$(wildcard $(addprefix $(..),\ | |
$(sys/param.h-includes)))),\ | |
$(sys/param.h-includes)) | |
.PHONY: sys/param.h-includes | |
sys/param.h-includes: $(addprefix $(common-objpfx),$(sys/param.h-includes)) | |
ifdef sys/param.h-includes | |
# Copy the system files to $(common-objdir). | |
$(addprefix $(common-objpfx),$(sys/param.h-includes)): $(common-objpfx)%: \ | |
$(sysincludedir)/% | |
$(make-target-directory) | |
# Some of these files sometimes contain conflicting declarations for htons, | |
# ntohs, etc. They also often contain definitions of *_ENDIAN and | |
# BYTE_ORDER, which we define ourselves in <endian.h>. | |
sed -e '/[ ]*[hn]to[nh][sl][ (]*/d' \ | |
-e '/^#define[ ]*[A-Z]*_ENDIAN/d' \ | |
-e '/^#define[ ]*BYTE_ORDER/d' \ | |
$< > $@-t | |
mv $@-t $@ | |
endif | |
common-generated := $(common-generated) \ | |
sys/param.h $(sys/param.h-includes) param.h.c param.h.dep | |
ifeq ($(subdir),misc) | |
# Install system headers the system sys/param.h uses. | |
sysdep_headers := $(sysdep_headers) $(sys/param.h-includes) | |
endif # misc | |
endif # No sysdep sys/param.h. | |
ifeq (,$(filter-out $(sysdep_dir)/generic/ $(common-objpfx),\ | |
$(dir $(firstword $(wildcard $(+sysdep_dirs:%=%/bits/errno.h)))))) | |
# These need to exist before any compiling is done, | |
# so cpp doesn't instead find the generic versions. | |
before-compile := $(before-compile) $(common-objpfx)bits/errno.h | |
$(common-objpfx)bits/errno.h: $(common-objpfx)make-errnos | |
$(dir $<)$(notdir $<) > $@-tmp | |
mv $@-tmp $@ | |
$(common-objpfx)make-errnos: $(common-objpfx)make-errnos.c | |
$(common-objdir-compile) | |
$(common-objpfx)make-errnos.c: $(sysdep_dir)/unix/errnos-tmpl.c \ | |
$(sysdep_dir)/unix/errnos.awk $(common-objpfx)errnos | |
$(AWK) -f $(word 2,$^) errnos="`tr '\012' ' ' < $(word 3,$^)`" $< > $@T | |
mv $@T $@ | |
$(common-objpfx)errnos: $(wildcard $(sysincludedir)/errno.h \ | |
$(sysincludedir)/sys/errno.h) | |
sed -n 's/^#define[ ]*\(E[A-Z0-9][A-Z0-9]*\)[ ].*$$/\1/p' \ | |
$^ > $@-tmp | |
mv $@-tmp $@ | |
common-generated := $(common-generated) \ | |
errnos.h errnos make-errnos make-errnos.c | |
endif | |
ifeq (,$(filter-out $(sysdep_dir)/generic/ $(common-objpfx),\ | |
$(dir $(firstword $(wildcard $(+sysdep_dirs:%=%/bits/ioctls.h)))))) | |
before-compile := $(before-compile) $(common-objpfx)bits/ioctls.h | |
$(common-objpfx)bits/ioctls.h: $(common-objpfx)make-ioctls | |
$(dir $<)$(notdir $<) > $@-tmp | |
mv $@-tmp $@ | |
ioctl-includes := sys/termios.h net/nit.h | |
ioctl-includes := $(wildcard $(addprefix $(sysincludedir)/,$(ioctl-includes))) | |
make-ioctls-CFLAGS := $(subst /,_,$(subst .,_,\ | |
$(patsubst $(sysincludedir)/%,-DHAVE_%,\ | |
$(ioctl-includes)))) | |
$(common-objpfx)make-ioctls: $(common-objpfx)make-ioctls.c | |
$(common-objdir-compile) | |
$(common-objpfx)make-ioctls.c: $(sysdep_dir)/unix/ioctls-tmpl.c \ | |
$(sysdep_dir)/unix/ioctls.awk \ | |
$(common-objpfx)ioctls | |
$(AWK) -f $(word 2,$^) requests="`cat $(word 3,$^)`" $< > $@T | |
mv $@T $@ | |
bits_termios.h := $(firstword $(wildcard $(+sysdep_dirs:%=%/bits/termios.h))) | |
ifeq ($(bits_termios.h),$(sysdep_dir)/generic/bits/termios.h) | |
bits_termios.h := # Ignore the generic version. | |
endif | |
# If there is a system-specific <bits/termios.h> file, we want to omit | |
# all the symbols it defines from ioctls. Otherwise, both | |
# <bits/ioctls.h> and <bits/termios.h> would define them. The | |
# system-specific <bits/termios.h> file presumably defines them with | |
# the same values as we find from the system's headers. We also want | |
# to omit from ioctls the symbols defined in our own | |
# <sys/ttydefaults.h>, to avoid multiple definition conflicts. We use | |
# snarf-ioctls on these files to find what symbols we want to omit. | |
# fgrep -xv gives all lines which do not match in their entirety; | |
# without -x, CSTOP's presence elided TIOCSTOP. | |
$(common-objpfx)ioctls: $(sysdep_dir)/unix/snarf-ioctls \ | |
$(sysincludedir)/sys/ioctl.h $(ioctl-includes) | |
$(dir $<)$(notdir $<) $(filter-out $<,$^) \ | |
| fgrep -xv "`($(dir $<)$(notdir $<) $(bits_termios.h) \ | |
$(..)sysdeps/generic/sys/ttydefaults.h; \ | |
echo NULL) \ | |
| sort | uniq`" \ | |
| sort | uniq | tr '\012' ' ' > $@-tmp | |
mv $@-tmp $@ | |
common-generated := $(common-generated) \ | |
bits/ioctls.h ioctls make-ioctls make-ioctls.c | |
endif | |
ifeq (,$(filter-out $(sysdep_dir)/generic/ $(common-objpfx),\ | |
$(dir $(firstword $(wildcard $(+sysdep_dirs:%=%/sys/syscall.h)))))) | |
# The syscall code assumes a file <sys/syscall.h> that defines macros | |
# `SYS_call' for syscall `call'. Variations on this I have seen include: | |
# it's in <sys/syscall.h>; | |
# it's in <sys.s>; | |
# it defines `CALL' instead of `SYS_call'. | |
# Irix has a <syscall.h> which is not what we want, so check for <sys.s> first. | |
# Find a file that might have these. NOTE: This list of possibilities is | |
# repeated in sysdeps/unix/configure and the two should be kept in sync. | |
syscall.h := $(firstword $(wildcard $(addprefix $(sysincludedir)/, \ | |
sys.s sys/sys.s \ | |
sys.S sys/sys.S \ | |
syscall.h sys/syscall.h \ | |
))) | |
ifdef syscall.h | |
# Transmogrify any of several formats of the file into the one we want. | |
$(common-objpfx)sys/syscall.h: $(syscall.h) | |
$(make-target-directory) | |
tr '[A-Z]' '[a-z]' < $< | \ | |
sed -e 's/[ ]sys_/ /' \ | |
-e 's/^#define[ ]*\([a-z0-9_]*\)[ ]*/#define SYS_\1 /' \ | |
-e 's/[ ]sys_/ SYS_/' \ | |
-e 's/SYS_syscall_basenum/syscall_basenum/g' \ | |
-e 's/SYS_kerncall_basenum/kerncall_basenum/g' \ | |
-e 's/SYS_sysvoffset/sysvoffset/g' \ | |
-e '/^#/!d' \ | |
-e '/^#ident/d' \ | |
-e 's-\(/\*[^*]*\)$$-\1\*/-' \ | |
> $@-tmp | |
mv $@-tmp $@ | |
before-compile += $(common-objpfx)sys/syscall.h | |
common-generated += sys/syscall.h | |
endif | |
endif | |
ifndef inhibit-unix-syscalls | |
# Sysdep dirs unix/... can contain a file syscalls.list, | |
# which specifies objects to be compiled as simple Unix system calls. | |
-include $(common-objpfx)sysd-syscalls | |
ifeq (misc,$(subdir)) | |
sysdep_routines += $(unix-extra-syscalls) | |
ifdef unix-stub-syscalls | |
# The system call entry points in this list are supposed to be additional | |
# functions not overriding any other sysdeps/.../call.c implementation, but | |
# their system call numbers are unavailable in the kernel headers we're | |
# using. Instead of a system call stub, these get a function that fails | |
# with ENOSYS. We just generate a single module defining one function and | |
# making all these entry point names aliases for it. | |
sysdep_routines += stub-syscalls | |
$(objpfx)stub-syscalls.c: $(common-objpfx)sysd-syscalls \ | |
$(..)sysdeps/unix/Makefile | |
$(make-target-directory) | |
(for call in $(unix-stub-syscalls); do \ | |
echo "#define $$call RENAMED_$$call"; \ | |
done; \ | |
echo '#include <errno.h>'; \ | |
for call in $(unix-stub-syscalls); do \ | |
echo "#undef $$call"; \ | |
done; \ | |
echo 'long int _no_syscall (void)'; \ | |
echo '{ __set_errno (ENOSYS); return -1L; }'; \ | |
for call in $(unix-stub-syscalls); do \ | |
case $$call in \ | |
*@@*) ver=$${call##*@}; call=$${call%%*@}; \ | |
echo "strong_alias (_no_syscall, $${call}_$${ver})"; \ | |
echo "default_symbol_version \ | |
($${call}_$${ver}, $$call, $$ver);" ;; \ | |
*@@*) ver=$${call##*@}; call=$${call%%*@}; \ | |
echo "strong_alias (_no_syscall, $${call}_$${ver})"; \ | |
echo "symbol_version ($${call}_$${ver}, $$call, $$ver);" ;; \ | |
*) echo "weak_alias (_no_syscall, $$call)"; \ | |
echo "stub_warning ($$call)"; \ | |
echo "weak_alias (_no_syscall, __GI_$$call)" ;; \ | |
esac; \ | |
echo '#include <stub-tag.h>'; \ | |
done) > $@T | |
mv -f $@T $@ | |
generated += stub-syscalls.c | |
endif | |
endif | |
# This is the end of the pipeline for compiling the syscall stubs. | |
# The stdin is assembler with cpp using sysdep.h macros. | |
compile-syscall = $(COMPILE.S) -o $@ -x assembler-with-cpp - \ | |
$(compile-mkdep-flags) | |
ifndef avoid-generated | |
$(common-objpfx)sysd-syscalls: $(..)sysdeps/unix/make-syscalls.sh \ | |
$(wildcard $(+sysdep_dirs:%=%/syscalls.list)) | |
for dir in $(+sysdep_dirs); do \ | |
test -f $$dir/syscalls.list && \ | |
{ sysdirs='$(sysdirs)' \ | |
asm_CPP='$(COMPILE.S) -E -x assembler-with-cpp' \ | |
$(SHELL) $(dir $<)$(notdir $<) $$dir || exit 1; }; \ | |
test $$dir = $(..)sysdeps/unix && break; \ | |
done > $@T | |
mv -f $@T $@ | |
endif | |
# The $(bppfx)syscall.ob objects depend on s-proto-bp.d, which are | |
# generated to specify dependencies generated BP stubs have on headers. | |
# These deps use file names relative to a subdir, so don't | |
# include them in the parent directory. | |
ifneq (,$(filter $(unix-syscalls),$(routines) $(sysdep_routines) $(aux))) | |
ifndef no_deps | |
-include $(common-objpfx)s-proto-bp.d | |
endif | |
endif | |
$(common-objpfx)s-%.d: $(..)sysdeps/unix/s-%.S \ | |
$(wildcard $(+sysdep_dirs:%=%/syscalls.list)) | |
$(+make-deps) | |
common-generated += s-proto-bp.d | |
postclean-generated += sysd-syscalls | |
endif |