1 # Process this file with autoconf to produce a configure script.
2 # Copyright (C) 1995, 1997, 1998 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.
26 # For g77 we'll set CC to point at the built gcc, but this will get it into
34 dnl Checks for libraries.
36 dnl Checks for header files.
37 # Sanity check for the cross-compilation case:
38 AC_CHECK_HEADER(stdio.h,:,
39 [AC_MSG_ERROR([Can't find stdio.h.
40 You must have a usable C system for the target already installed, at least
41 including headers and, preferably, the library, before you can configure
42 the G77 runtime system. If necessary, install gcc now with \`LANGUAGES=c',
43 then the target library, then build with \`LANGUAGES=f77'.])])
46 dnl We could do this if we didn't know we were using gcc
47 dnl AC_MSG_CHECKING(for prototype-savvy compiler)
48 dnl AC_CACHE_VAL(g77_cv_sys_proto,
50 dnl dnl looks screwy because TRY_LINK expects a function body
51 dnl [return 0;} int foo (int * bar) {],
52 dnl g77_cv_sys_proto=yes,
53 dnl [g77_cv_sys_proto=no
54 dnl AC_DEFINE(KR_headers)])])
55 dnl AC_MSG_RESULT($g77_cv_sys_proto)
57 AC_MSG_CHECKING(for posix)
58 AC_CACHE_VAL(g77_cv_header_posix,
60 [#include <sys/types.h>
66 g77_cv_header_posix=yes,
67 g77_cv_header_posix=no))
68 AC_MSG_RESULT($g77_cv_header_posix)
70 # We can rely on the GNU library being posix-ish. I guess checking the
71 # header isn't actually like checking the functions, though...
72 AC_MSG_CHECKING(for GNU library)
73 AC_CACHE_VAL(g77_cv_lib_gnu,
76 #ifdef __GNU_LIBRARY__
80 g77_cv_lib_gnu=yes, g77_cv_lib_gnu=no))
81 AC_MSG_RESULT($g77_cv_lib_gnu)
83 dnl Checks for library functions.
85 # we'll get atexit by default
86 if test $ac_cv_header_stdc != yes; then
88 AC_DEFINE(onexit,atexit),dnl just in case
90 AC_CHECK_FUNC(onexit,,
91 [AC_CHECK_FUNC(on_exit,
92 AC_DEFINE(onexit,on_exit),)])])
96 dnl perhaps should check also for remainder
97 dnl Unfortunately, the message implies we're just checking for -lm...
98 AC_CHECK_LIB(m,drem,AC_DEFINE(IEEE_drem))
100 AC_DEFINE(Skip_f2c_Undefs)
105 dnl comment-start: "dnl "
107 dnl comment-start-skip: "\\bdnl\\b\\s *"