1 # Process this file with autoconf to produce a configure script.
2 # Copyright (C) 1995, 1997, 1998, 2001 Free Software Foundation, Inc.
3 # Contributed by Dave Love (d.love@dl.ac.uk).
5 #This file is part of GNU Fortran.
7 #GNU Fortran 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)
12 #GNU Fortran 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.
17 #You should have received a copy of the GNU General Public License
18 #along with GNU Fortran; see the file COPYING. If not, write to
19 #the Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA
25 dnl Checks for programs.
27 dnl FIXME AC_PROG_CC wants CC to be able to link things, but it may
29 define([AC_PROG_CC_WORKS],[])
31 # For g77 we'll set CC to point at the built gcc, but this will get it into
35 LIBTOOL='$(SHELL) ../libtool'
40 if test "$RANLIB"; then :
47 dnl Checks for libraries.
49 dnl Checks for header files.
50 # Sanity check for the cross-compilation case:
51 AC_CHECK_HEADER(stdio.h,:,
52 [AC_MSG_ERROR([Can't find stdio.h.
53 You must have a usable C system for the target already installed, at least
54 including headers and, preferably, the library, before you can configure
55 the G77 runtime system. If necessary, install gcc now with \`LANGUAGES=c',
56 then the target library, then build with \`LANGUAGES=f77'.])])
59 AC_MSG_CHECKING(for posix)
60 AC_CACHE_VAL(g77_cv_header_posix,
62 [#include <sys/types.h>
68 g77_cv_header_posix=yes,
69 g77_cv_header_posix=no))
70 AC_MSG_RESULT($g77_cv_header_posix)
72 # We can rely on the GNU library being posix-ish. I guess checking the
73 # header isn't actually like checking the functions, though...
74 AC_MSG_CHECKING(for GNU library)
75 AC_CACHE_VAL(g77_cv_lib_gnu,
78 #ifdef __GNU_LIBRARY__
82 g77_cv_lib_gnu=yes, g77_cv_lib_gnu=no))
83 AC_MSG_RESULT($g77_cv_lib_gnu)
85 dnl Checks for library functions.
87 # we'll get atexit by default
88 if test $ac_cv_header_stdc != yes; then
90 AC_DEFINE(onexit,atexit),dnl just in case
92 AC_CHECK_FUNC(onexit,,
93 [AC_CHECK_FUNC(on_exit,
94 AC_DEFINE(onexit,on_exit),)])])
98 dnl perhaps should check also for remainder
99 dnl Unfortunately, the message implies we're just checking for -lm...
100 AC_CHECK_LIB(m,drem,AC_DEFINE(IEEE_drem))
102 AC_DEFINE(Skip_f2c_Undefs)
103 AC_DEFINE(IEEE_COMPLEX_DIVIDE)
108 dnl comment-start: "dnl "
110 dnl comment-start-skip: "\\bdnl\\b\\s *"