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# Process this file with autoconf to produce a configure script.
# Copyright (C) 1995, 1997, 1998 Free Software Foundation, Inc.
# Contributed by Dave Love (d.love@dl.ac.uk).
#
#This file is part of GNU Fortran.
#
#GNU Fortran is free software; you can redistribute it and/or modify
#it under the terms of the GNU General Public License as published by
#the Free Software Foundation; either version 2, or (at your option)
#any later version.
#
#GNU Fortran 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 General Public License for more details.
#
#You should have received a copy of the GNU General Public License
#along with GNU Fortran; see the file COPYING. If not, write to
#the Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA
#02111-1307, USA.
AC_PREREQ(2.12.1)
AC_INIT(getarg_.c)
dnl Checks for programs.
# For g77 we'll set CC to point at the built gcc, but this will get it into
# the makefiles
AC_PROG_CC
test "$AR" || AR=ar
AC_SUBST(AR)
AC_PROG_MAKE_SET
dnl Checks for libraries.
dnl Checks for header files.
# Sanity check for the cross-compilation case:
AC_CHECK_HEADER(stdio.h,:,
[AC_MSG_ERROR([Can't find stdio.h.
You must have a usable C system for the target already installed, at least
including headers and, preferably, the library, before you can configure
the G77 runtime system. If necessary, install gcc now with \`LANGUAGES=c',
then the target library, then build with \`LANGUAGES=f77'.])])
AC_HEADER_STDC
dnl We could do this if we didn't know we were using gcc
dnl AC_MSG_CHECKING(for prototype-savvy compiler)
dnl AC_CACHE_VAL(g77_cv_sys_proto,
dnl [AC_TRY_LINK(,
dnl dnl looks screwy because TRY_LINK expects a function body
dnl [return 0;} int foo (int * bar) {],
dnl g77_cv_sys_proto=yes,
dnl [g77_cv_sys_proto=no
dnl AC_DEFINE(KR_headers)])])
dnl AC_MSG_RESULT($g77_cv_sys_proto)
AC_MSG_CHECKING(for posix)
AC_CACHE_VAL(g77_cv_header_posix,
AC_EGREP_CPP(yes,
[#include <sys/types.h>
#include <unistd.h>
#ifdef _POSIX_VERSION
yes
#endif
],
g77_cv_header_posix=yes,
g77_cv_header_posix=no))
AC_MSG_RESULT($g77_cv_header_posix)
# We can rely on the GNU library being posix-ish. I guess checking the
# header isn't actually like checking the functions, though...
AC_MSG_CHECKING(for GNU library)
AC_CACHE_VAL(g77_cv_lib_gnu,
AC_EGREP_CPP(yes,
[#include <stdio.h>
#ifdef __GNU_LIBRARY__
yes
#endif
],
g77_cv_lib_gnu=yes, g77_cv_lib_gnu=no))
AC_MSG_RESULT($g77_cv_lib_gnu)
dnl Checks for library functions.
AC_TYPE_SIGNAL
# we'll get atexit by default
if test $ac_cv_header_stdc != yes; then
AC_CHECK_FUNC(atexit,
AC_DEFINE(onexit,atexit),dnl just in case
[AC_DEFINE(NO_ONEXIT)
AC_CHECK_FUNC(onexit,,
[AC_CHECK_FUNC(on_exit,
AC_DEFINE(onexit,on_exit),)])])
else true
fi
dnl perhaps should check also for remainder
dnl Unfortunately, the message implies we're just checking for -lm...
AC_CHECK_LIB(m,drem,AC_DEFINE(IEEE_drem))
AC_DEFINE(Skip_f2c_Undefs)
AC_DEFINE(IEEE_COMPLEX_DIVIDE)
AC_OUTPUT(Makefile)
dnl Local Variables:
dnl comment-start: "dnl "
dnl comment-end: ""
dnl comment-start-skip: "\\bdnl\\b\\s *"
dnl End:
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