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# Copyright (C) 1993, 1994, 1995 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 Library General Public License
# as published by the Free Software Foundation; either version 2 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
# Library General Public License for more details.
# You should have received a copy of the GNU Library General Public
# License along with the GNU C Library; see the file COPYING.LIB. If
# not, write to the Free Software Foundation, Inc., 675 Mass Ave,
# Cambridge, MA 02139, USA.
sysincludedir=/usr/include # XXX
# Find the <syscall.h> file we will be using, or something like it.
unix_found=
for unix_dir in $sysnames; do
if test -r $sysdep_dir/$unix_dir/syscall.h; then
unix_found=$unix_dir
break
fi
done
if test $unix_found = stub; then
# XXX This list of possibilities duplicates the list in Makefile.
for try in sys.s sys/sys.s sys.S sys/sys.S syscall.h sys/syscall.h; do
if test -r $sysincludedir/$try; then
unix_syscall_h=$sysincludedir/$try
break
fi
done
else
unix_syscall_h=$sysdep_dir/$unix_dir/syscall.h
fi
test -n "$unix_syscall_h" && {
# Where to put the .S files we write.
if test "`pwd`" = "`(cd $srcdir; pwd)`"; then
unix_generated_dirpfx=sysdeps/unix/
else
# We are running in a separate build directory.
unix_generated_dirpfx=
fi
# This variable will collect the names of the files we create.
unix_generated=
unix_srcs=
unix_dests=
# These several functions are system calls on Unix systems which have them.
# The details of these calls are universal enough that if a system's
# <syscall.h> defines the system call number, we know that the simple
# system call implementations in unix/common will be sufficient.
for unix_function in \
dup2 lstat mkdir rmdir readlink symlink rename swapon \
access select getgroups setgroups \
getitimer setitimer \
getdomainname/getdomain=bsd/bsd4.4 \
setdomainname/setdomain=bsd/bsd4.4
do
# $unix_function => $unix_syscall $unix_srcname
# CALL CALL CALL
# CALL/NAME CALL NAME
unix_srcname=
unix_srcdir=common
eval "unix_syscall=`echo $unix_function | \
sed -e 's@=\(.*\)$@ unix_srcdir=\1@' \
-e 's@/\(.*\)$@ unix_srcname=\1@'`"
test -z "$unix_srcname" && unix_srcname=$unix_function
unix_implementor=none
for unix_dir in $sysnames; do
if test -r $sysdep_dir/$unix_dir/${unix_srcname}.c ||
test -r $sysdep_dir/$unix_dir/${unix_srcname}.S ||
test -r $sysdep_dir/$unix_dir/${unix_srcname}.s; then
unix_implementor=$unix_dir
break
fi
done
# mkdir and rmdir have implementations in unix/sysv, but
# the simple syscall versions are preferable if available.
test $unix_syscall = mkdir -o $unix_syscall = rmdir && \
test $unix_implementor = unix/sysv && \
unix_implementor=generic
case $unix_implementor in
none|stub|generic|posix)
# The chosen implementation of ${unix_syscall} is a boring one.
# We want to use the unix/common implementation instead iff
# ${unix_syscall} appears in <syscall.h>.
echo $ac_n "checking for ${unix_syscall} system call""... $ac_c" 1>&4
if grep -i "[ _]${unix_syscall}[ ]" $unix_syscall_h >/dev/null
then
# It does seem to be present in <syscall.h>.
echo "$ac_t""yes" 1>&4
unix_dests="$unix_dests ${unix_generated_dirpfx}${unix_srcname}.S"
unix_srcs="$unix_srcs sysdeps/unix/${unix_srcdir}/${unix_srcname}.S"
unix_generated="$unix_generated $unix_generated_dirpfx${unix_srcname}.S"
else
echo "$ac_t""no" 1>&4
fi
;;
*) ;;
esac
done
# Autoconf magic in the top-level configure.in causes config.status to
# actually make the links.
libc_link_dests="$libc_link_dests $unix_dests"
libc_link_sources="$libc_link_sources $unix_srcs"
# Store the list of files we created in config.make; Makefile uses it.
test -n "$unix_generated" && config_vars="$config_vars
unix-generated := \$(addprefix \$(objpfx),${unix_generated})"
}
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