glibc/sysdeps/unix/Makefile
Roland McGrath 363a641b1c * Makeconfig (sysd-rules-targets): New variable.
* sysdeps/unix/make-syscalls.sh: Use it in the rules emitted.
	* sysdeps/unix/Makefile (omit-deps): Append variants for each target.
2008-02-01 00:01:25 +00:00

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# Copyright (C) 1991,1992,1993,1994,1995,1996,1997,1998,1999,2003, 2006, 2008
# 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-\(/\*[^*]*\)$$-\1\*/-' \
> $@-tmp
mv $@-tmp $@
before-compile += $(common-objpfx)sys/syscall.h
common-generated += sys/syscall.h
endif
endif
ifndef inhibit-unix-syscalls
# Sysdep dirs unix/... can contain a file syscalls.list,
# which specifies objects to be compiled as simple Unix system calls.
-include $(common-objpfx)sysd-syscalls
omit-deps += $(foreach t,$(sysd-rules-targets),$(unix-syscalls:%=$t))
ifeq (misc,$(subdir))
sysdep_routines += $(unix-extra-syscalls)
ifdef unix-stub-syscalls
# The system call entry points in this list are supposed to be additional
# functions not overriding any other sysdeps/.../call.c implementation, but
# their system call numbers are unavailable in the kernel headers we're
# using. Instead of a system call stub, these get a function that fails
# with ENOSYS. We just generate a single module defining one function and
# making all these entry point names aliases for it.
sysdep_routines += stub-syscalls
$(objpfx)stub-syscalls.c: $(common-objpfx)sysd-syscalls \
$(..)sysdeps/unix/Makefile
$(make-target-directory)
(for call in $(unix-stub-syscalls); do \
echo "#define $$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 in assembler with cpp using sysdep.h macros.
# Be sure to disable debugging info since it would all just say "<stdin>".
compile-syscall = $(filter-out -g%,$(COMPILE.S)) -x assembler-with-cpp -o $@ -
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 $@
endif
# The syscall objects depend on s-proto.d or s-proto-cancel.d, which
# are generated to specify dependencies generated syscalls have on
# headers.
# These deps use file names relative to a subdir, so don't
# include them in the parent directory.
ifneq (,$(filter $(unix-syscalls),$(routines) $(sysdep_routines) $(aux)))
ifndef no_deps
-include $(common-objpfx)s-proto.d
-include $(common-objpfx)s-proto-bp.d
-include $(common-objpfx)s-proto-cancel.d
endif
endif
$(common-objpfx)s-%.d: $(..)sysdeps/unix/s-%.S \
$(wildcard $(+sysdep_dirs:%=%/syscalls.list))
$(+make-deps)
common-generated += s-proto.d s-proto-bp.d s-proto-cancel.d
postclean-generated += sysd-syscalls
endif