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authorRoland McGrath <roland@gnu.org>1995-02-18 01:27:10 +0000
committerRoland McGrath <roland@gnu.org>1995-02-18 01:27:10 +0000
commit28f540f45bbacd939bfd07f213bcad2bf730b1bf (patch)
tree15f07c4c43d635959c6afee96bde71fb1b3614ee /sysdeps/unix/configure.in
downloadglibc-28f540f45bbacd939bfd07f213bcad2bf730b1bf.tar.gz
initial import
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diff --git a/sysdeps/unix/configure.in b/sysdeps/unix/configure.in
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+sinclude(./aclocal.m4)dnl Autoconf lossage.
+GLIBC_PROVIDES dnl See aclocal.m4 in the top level source directory.
+# 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.
+
+dnl configure fragment for Unix-based systems. This is processed by Autoconf,
+dnl but we just use the AC_MSG_* macros. This file is sourced by the
+dnl top-level configure script. Note that we use the prefix `unix_' on all
+dnl shell variables here, to avoid conflicting with any variables the
+dnl top-level script might be using.
+
+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>.
+ AC_MSG_CHECKING(for ${unix_syscall} system call)
+changequote(,)dnl We need to use [ and ] for real now.
+ if grep -i "[ _]${unix_syscall}[ ]" $unix_syscall_h >/dev/null
+changequote([,])dnl Back to Autoconf land.
+ then
+ # It does seem to be present in <syscall.h>.
+ AC_MSG_RESULT(yes)
+ unix_dests="$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
+ AC_MSG_RESULT(no)
+ 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})"
+
+}