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.
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
39 dnl Checks for libraries.
41 dnl Checks for header files.
42 # Sanity check for the cross-compilation case:
43 AC_CHECK_HEADER(stdio.h,:,
44 [AC_MSG_ERROR([Can't find stdio.h.
45 You must have a usable C system for the target already installed, at least
46 including headers and, preferably, the library, before you can configure
47 the G77 runtime system. If necessary, install gcc now with \`LANGUAGES=c',
48 then the target library, then build with \`LANGUAGES=f77'.])])
51 dnl We could do this if we didn't know we were using gcc
52 dnl AC_MSG_CHECKING(for prototype-savvy compiler)
53 dnl AC_CACHE_VAL(g77_cv_sys_proto,
55 dnl dnl looks screwy because TRY_LINK expects a function body
56 dnl [return 0;} int foo (int * bar) {],
57 dnl g77_cv_sys_proto=yes,
58 dnl [g77_cv_sys_proto=no
59 dnl AC_DEFINE(KR_headers)])])
60 dnl AC_MSG_RESULT($g77_cv_sys_proto)
62 AC_MSG_CHECKING(for posix)
63 AC_CACHE_VAL(g77_cv_header_posix,
65 [#include <sys/types.h>
71 g77_cv_header_posix=yes,
72 g77_cv_header_posix=no))
73 AC_MSG_RESULT($g77_cv_header_posix)
75 # We can rely on the GNU library being posix-ish. I guess checking the
76 # header isn't actually like checking the functions, though...
77 AC_MSG_CHECKING(for GNU library)
78 AC_CACHE_VAL(g77_cv_lib_gnu,
81 #ifdef __GNU_LIBRARY__
85 g77_cv_lib_gnu=yes, g77_cv_lib_gnu=no))
86 AC_MSG_RESULT($g77_cv_lib_gnu)
88 dnl Checks for library functions.
90 # we'll get atexit by default
91 if test $ac_cv_header_stdc != yes; then
93 AC_DEFINE(onexit,atexit),dnl just in case
95 AC_CHECK_FUNC(onexit,,
96 [AC_CHECK_FUNC(on_exit,
97 AC_DEFINE(onexit,on_exit),)])])
101 dnl perhaps should check also for remainder
102 dnl Unfortunately, the message implies we're just checking for -lm...
103 AC_CHECK_LIB(m,drem,AC_DEFINE(IEEE_drem))
105 AC_DEFINE(Skip_f2c_Undefs)
106 AC_DEFINE(IEEE_COMPLEX_DIVIDE)
111 dnl comment-start: "dnl "
113 dnl comment-start-skip: "\\bdnl\\b\\s *"