1# Process this file with autoconf to produce a configure script.
2#   Copyright (C) 1995, 1997, 1998, 1999 Free Software Foundation, Inc.
3#   Contributed by Dave Love (d.love@dl.ac.uk).
4#
5#This file is part of GNU CC.
6#
7#GNU CHILL is free software; you can redistribute it and/or modify
8#it under the terms of the GNU General Public License as published by
9#the Free Software Foundation; either version 2, or (at your option)
10#any later version.
11#
12#GNU CHILL is distributed in the hope that it will be useful,
13#but WITHOUT ANY WARRANTY; without even the implied warranty of
14#MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15#GNU General Public License for more details.
16#
17#You should have received a copy of the GNU General Public License
18#along with GNU CHILL; see the file COPYING.  If not, write to
19#the Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA
20#02111-1307, USA.
21
22AC_PREREQ(2.13)
23AC_INIT(chillrt0.c)
24
25if test "${srcdir}" = "." ; then
26  if test "${with_target_subdir}" != "." ; then
27    topsrcdir=${with_multisrctop}../..
28  else
29    topsrcdir=${with_multisrctop}..
30  fi
31else
32  topsrcdir=${srcdir}/..
33fi
34dnl This is needed for a multilibbed build in the source tree so
35dnl that install-sh and config.sub get found.
36AC_CONFIG_AUX_DIR($topsrcdir)
37
38# If the language specific compiler does not exist, but the "gcc" directory 
39# does, we do not build anything. Note, $r is set by the top-level Makefile.
40# Note that when we look for the compiler, we search both with and without
41# extension to handle cross and canadian cross builds. 
42compiler_name=cc1chill
43rm -f skip-this-dir
44AC_MSG_CHECKING(if compiler $compiler_name has been built)
45AC_CACHE_VAL(chill_cv_compiler_exists,
46[chill_cv_compiler_exists=yes
47if test -n "$r"; then
48  if test -d "$r"/gcc; then
49    if test -f "$r"/gcc/$compiler_name \
50       || test -f "$r"/gcc/$compiler_name.exe; then
51      true
52    else
53      chill_cv_compiler_exists=no
54      echo "rm -f config.cache config.log multilib.out" > skip-this-dir
55    fi
56  fi
57fi
58])
59AC_MSG_RESULT($chill_cv_compiler_exists)
60if test x$chill_cv_compiler_exists = xno
61then
62  rm -f Makefile conftest* confdefs* core
63  exit 0
64fi
65
66dnl Checks for programs.
67# For chill we'll set CC to point at the built gcc, but this will get it into
68# the makefiles
69AC_PROG_CC
70
71test "$AR" || AR=ar
72AC_SUBST(AR)
73AC_PROG_MAKE_SET
74
75dnl Checks for libraries.
76
77dnl Checks for header files.
78# Sanity check for the cross-compilation case:
79AC_CHECK_HEADER(stdio.h,:,
80  [AC_MSG_ERROR([Can't find stdio.h.
81You must have a usable C system for the target already installed, at least
82including headers and, preferably, the library, before you can configure
83the Chill runtime system.  If necessary, install gcc now with \`LANGUAGES=c',
84then the target library, then build with \`LANGUAGES=chill'.])])
85
86AC_HEADER_STDC
87
88AC_MSG_CHECKING(for posix)
89AC_CACHE_VAL(chill_cv_header_posix,
90  AC_EGREP_CPP(yes,
91  [#include <sys/types.h>
92#include <unistd.h>
93#ifdef _POSIX_VERSION
94  yes
95#endif
96], 
97  chill_cv_header_posix=yes,
98  chill_cv_header_posix=no))
99AC_MSG_RESULT($chill_cv_header_posix)
100
101# We can rely on the GNU library being posix-ish.  I guess checking the 
102# header isn't actually like checking the functions, though...
103AC_MSG_CHECKING(for GNU library)
104AC_CACHE_VAL(chill_cv_lib_gnu,
105  AC_EGREP_CPP(yes,
106    [#include <stdio.h>
107#ifdef __GNU_LIBRARY__
108  yes
109#endif
110], 
111  chill_cv_lib_gnu=yes, chill_cv_lib_gnu=no))
112AC_MSG_RESULT($chill_cv_lib_gnu)
113
114dnl Checks for library functions.
115AC_TYPE_SIGNAL
116# we'll get atexit by default
117if test $ac_cv_header_stdc != yes; then
118AC_CHECK_FUNC(atexit,
119  AC_DEFINE(onexit,atexit),dnl just in case
120  [AC_DEFINE(NO_ONEXIT)
121  AC_CHECK_FUNC(onexit,,
122    [AC_CHECK_FUNC(on_exit,
123     AC_DEFINE(onexit,on_exit),)])])
124else true
125fi
126
127# We need multilib support, but only if configuring for the target.
128AC_OUTPUT(Makefile,
129[test -z "$CONFIG_HEADERS" || echo timestamp > stamp-h
130if test -n "$CONFIG_FILES"; then
131  if test -n "${with_target_subdir}"; then
132    # FIXME: We shouldn't need to set ac_file
133    ac_file=Makefile
134    . ${topsrcdir}/config-ml.in
135  fi
136fi],
137srcdir=${srcdir}
138host=${host}
139target=${target}
140with_target_subdir=${with_target_subdir}
141with_multisubdir=${with_multisubdir}
142ac_configure_args="--enable-multilib ${ac_configure_args}"
143CONFIG_SHELL=${CONFIG_SHELL-/bin/sh}
144topsrcdir=${topsrcdir}
145)
146
147
148
149dnl Local Variables:
150dnl comment-start: "dnl "
151dnl comment-end: ""
152dnl comment-start-skip: "\\bdnl\\b\\s *"
153dnl End:
154