glibc/sysdeps/unix/Makefile
Roland McGrath 130ed2359f 2003-03-27 Roland McGrath <roland@redhat.com>
* sysdeps/unix/Makefile ($(objpfx)stub-syscalls.c): Emit stub_warning
	macro calls and a #include <stub-tag.h> at the end.
	* Makerules ($(objpfx)stubs): Tweak sed commands.
2003-03-27 09:47:16 +00:00

360 lines
12 KiB
Makefile
Raw Blame History

This file contains invisible Unicode characters

This file contains invisible Unicode characters that are indistinguishable to humans but may be processed differently by a computer. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

# Copyright (C) 1991,1992,1993,1994,1995,1996,1997,1998,1999,2003
# 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 := $(common-generated) \
bits/ioctls.h ioctls make-ioctls make-ioctls.c
endif
ifeq ($(subdir),stdio-common)
ifeq (,$(filter-out $(sysdep_dir)/generic/ $(objpfx),\
$(dir $(firstword $(wildcard $(+sysdep_dirs:%=%/errlist.c))))))
before-compile: $(objpfx)errlist.c
$(objpfx)errlist.c: $(objpfx)make_errlist
@rm -f $@
$(dir $<)$(notdir $<) > $@-tmp
mv $@-tmp $@
$(objpfx)make_errlist: $(sysdep_dir)/unix/make_errlist.c
$(native-compile)
generated := $(generated) make_errlist errlist.c
endif
endif # stdio-common
ifeq (,$(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-\(/\*[^*]*\)$$-\1\*/-' \
> $@-tmp
mv $@-tmp $@
before-compile += $(common-objpfx)sys/syscall.h
common-generated += sys/syscall.h
endif
endif
ifndef inhibit-unix-syscalls
# Sysdep dirs unix/... can contain a file syscalls.list,
# which specifies objects to be compiled as simple Unix system calls.
-include $(common-objpfx)sysd-syscalls
omit-deps += $(unix-syscalls)
ifeq (misc,$(subdir))
sysdep_routines += $(unix-extra-syscalls)
ifdef unix-stub-syscalls
# The system call entry points in this list are supposed to be additional
# functions not overriding any other sysdeps/.../call.c implementation, but
# their system call numbers are unavailable in the kernel headers we're
# using. Instead of a system call stub, these get a function that fails
# with ENOSYS. We just generate a single module defining one function and
# making all these entry point names aliases for it.
sysdep_routines += stub-syscalls
$(objpfx)stub-syscalls.c: $(common-objpfx)sysd-syscalls \
$(..)sysdeps/unix/Makefile
(echo '#include <errno.h>'; \
echo 'long int _no_syscall (void)'; \
echo '{ __set_errno (ENOSYS); return -1L; }'; \
for call in $(unix-stub-syscalls); do \
case $$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_$$call)" ;; \
esac; \
echo '#include <stub-tag.h>'; \
done) > $@T
mv -f $@T $@
generated += stub-syscalls.c
endif
endif
export sysdirs
export asm_CPP := $(COMPILE.S) -E -x assembler-with-cpp
# This is the end of the pipeline for compiling the syscall stubs.
# The stdin in assembler with cpp using sysdep.h macros.
# Be sure to disable debugging info since it would all just say "<stdin>".
compile-syscall = $(filter-out -g%,$(COMPILE.S)) -x assembler-with-cpp -o $@ -
ifndef avoid-generated
$(common-objpfx)sysd-syscalls: $(..)sysdeps/unix/make-syscalls.sh \
$(wildcard $(+sysdep_dirs:%=%/syscalls.list))
for dir in $(+sysdep_dirs); do \
test -f $$dir/syscalls.list && \
{ $(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.
ifdef subdir
ifndef no_deps
# These deps use file names relative to a subdir, so don't
# include them in the parent directory.
-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))
# Don't try to use compat.h in the db2 subdir
$(subst -include ./compat.h,,$(+make-deps))
common-generated += s-proto.d s-proto-bp.d s-proto-cancel.d
postclean-generated += sysd-syscalls
endif