137 lines
4.7 KiB
Plaintext
137 lines
4.7 KiB
Plaintext
sinclude(./aclocal.m4)dnl Autoconf lossage.
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GLIBC_PROVIDES dnl See aclocal.m4 in the top level source directory.
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# Copyright (C) 1993, 1994, 1995 Free Software Foundation, Inc.
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# This file is part of the GNU C Library.
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# The GNU C Library is free software; you can redistribute it and/or
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# modify it under the terms of the GNU Library General Public License
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# as published by the Free Software Foundation; either version 2 of
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# the License, or (at your option) any later version.
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# The GNU C Library is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# Library General Public License for more details.
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# You should have received a copy of the GNU Library General Public
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# License along with the GNU C Library; see the file COPYING.LIB. If
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# not, write to the Free Software Foundation, Inc., 675 Mass Ave,
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# Cambridge, MA 02139, USA.
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dnl configure fragment for Unix-based systems. This is processed by Autoconf,
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dnl but we just use the AC_MSG_* macros. This file is sourced by the
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dnl top-level configure script. Note that we use the prefix `unix_' on all
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dnl shell variables here, to avoid conflicting with any variables the
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dnl top-level script might be using.
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sysincludedir=/usr/include # XXX
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# Find the <syscall.h> file we will be using, or something like it.
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unix_found=
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for unix_dir in $sysnames; do
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if test -r $sysdep_dir/$unix_dir/syscall.h; then
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unix_found=$unix_dir
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break
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fi
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done
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if test $unix_found = stub; then
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# XXX This list of possibilities duplicates the list in Makefile.
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for try in sys.s sys/sys.s sys.S sys/sys.S syscall.h sys/syscall.h; do
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if test -r $sysincludedir/$try; then
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unix_syscall_h=$sysincludedir/$try
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break
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fi
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done
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else
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unix_syscall_h=$sysdep_dir/$unix_dir/syscall.h
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fi
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test -n "$unix_syscall_h" && {
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# Where to put the .S files we write.
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if test "`pwd`" = "`(cd $srcdir; pwd)`"; then
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unix_generated_dirpfx=sysdeps/unix/
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else
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# We are running in a separate build directory.
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unix_generated_dirpfx=
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fi
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# This variable will collect the names of the files we create.
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unix_generated=
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unix_srcs=
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unix_dests=
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# These several functions are system calls on Unix systems which have them.
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# The details of these calls are universal enough that if a system's
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# <syscall.h> defines the system call number, we know that the simple
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# system call implementations in unix/common will be sufficient.
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for unix_function in \
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dup2 lstat mkdir rmdir readlink symlink rename swapon \
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access select getgroups setgroups \
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getitimer setitimer \
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getdomainname/getdomain=bsd/bsd4.4 \
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setdomainname/setdomain=bsd/bsd4.4
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do
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# $unix_function => $unix_syscall $unix_srcname
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# CALL CALL CALL
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# CALL/NAME CALL NAME
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unix_srcname=
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unix_srcdir=common
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eval "unix_syscall=`echo $unix_function | \
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sed -e 's@=\(.*\)$@ unix_srcdir=\1@' \
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-e 's@/\(.*\)$@ unix_srcname=\1@'`"
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test -z "$unix_srcname" && unix_srcname=$unix_function
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unix_implementor=none
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for unix_dir in $sysnames; do
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if test -r $sysdep_dir/$unix_dir/${unix_srcname}.c ||
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test -r $sysdep_dir/$unix_dir/${unix_srcname}.S ||
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test -r $sysdep_dir/$unix_dir/${unix_srcname}.s; then
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unix_implementor=$unix_dir
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break
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fi
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done
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# mkdir and rmdir have implementations in unix/sysv, but
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# the simple syscall versions are preferable if available.
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test $unix_syscall = mkdir -o $unix_syscall = rmdir && \
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test $unix_implementor = unix/sysv && \
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unix_implementor=generic
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case $unix_implementor in
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none|stub|generic|posix)
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# The chosen implementation of ${unix_syscall} is a boring one.
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# We want to use the unix/common implementation instead iff
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# ${unix_syscall} appears in <syscall.h>.
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AC_MSG_CHECKING(for ${unix_syscall} system call)
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changequote(,)dnl We need to use [ and ] for real now.
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if grep -i "[ _]${unix_syscall}[ ]" $unix_syscall_h >/dev/null
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changequote([,])dnl Back to Autoconf land.
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then
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# It does seem to be present in <syscall.h>.
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AC_MSG_RESULT(yes)
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unix_dests="$unix_dests ${unix_generated_dirpfx}${unix_srcname}.S"
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unix_srcs="$unix_srcs sysdeps/unix/${unix_srcdir}/${unix_srcname}.S"
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unix_generated="$unix_generated $unix_generated_dirpfx${unix_srcname}.S"
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else
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AC_MSG_RESULT(no)
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fi
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;;
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*) ;;
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esac
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done
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# Autoconf magic in the top-level configure.in causes config.status to
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# actually make the links.
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libc_link_dests="$libc_link_dests $unix_dests"
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libc_link_sources="$libc_link_sources $unix_srcs"
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# Store the list of files we created in config.make; Makefile uses it.
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test -n "$unix_generated" && config_vars="$config_vars
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unix-generated := \$(addprefix \$(objpfx),${unix_generated})"
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}
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