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($g77_cv_lib_gnu)
88 # Apparently cygwin needs to be special-cased.
89 AC_MSG_CHECKING([for cyg\`win'32])
90 AC_CACHE_VAL(g77_cv_sys_cygwin32,
96 g77_cv_sys_cygwin32=yes,
97 g77_cv_sys_cygwin32=no))
98 AC_MSG_RESULT($g77_cv_sys_cygwin32)
101 AC_MSG_CHECKING([for mingw32])
102 AC_CACHE_VAL(g77_cv_sys_mingw32,
108 g77_cv_sys_mingw32=yes,
109 g77_cv_sys_mingw32=no))
110 AC_MSG_RESULT($g77_cv_sys_mingw32)
113 AC_CHECK_HEADER(fcntl.h,
114 test $g77_cv_header_posix = yes && AC_DEFINE(_POSIX_SOURCE),
115 AC_DEFINE(NO_FCNTL) AC_DEFINE(OPEN_DECL))
117 dnl Checks for typedefs, structures, and compiler characteristics.
121 dnl Checks for library functions.
123 # This should always succeed on unix.
124 # Apparently positive result on cygwin loses re. NON_UNIX_STDIO
125 # (as of cygwin b18). Likewise on mingw.
127 AC_MSG_CHECKING([need for NON_UNIX_STDIO])
128 if test $g77_cv_sys_cygwin32 = yes \
129 || test $g77_cv_sys_mingw32 = yes \
130 || test $ac_cv_func_fstat = no; then
132 AC_DEFINE(NON_UNIX_STDIO)
137 AC_CHECK_FUNCS(mkstemp)
138 AC_CHECK_FUNCS(tempnam)
140 # posix will guarantee the right behaviour for sprintf, else we can't be
141 # sure; HEADER_STDC wouldn't be the right check in sunos4, for instance.
142 # However, on my sunos4/gcc setup unistd.h leads us wrongly to believe
143 # we're posix-conformant, so always do the test.
144 AC_MSG_CHECKING(for ansi/posix sprintf result)
145 dnl This loses if included as an argument to AC_CACHE_VAL because the
146 dnl changequote doesn't take effect and the [] vanish.
147 dnl fixme: use cached value
148 AC_TRY_RUN(changequote(<<, >>)dnl
150 /* does sprintf return the number of chars transferred? */
151 main () {char foo[2]; (sprintf(foo, "1") == 1) ? exit(0) : exit(1);}
153 g77_cv_sys_sprintf_ansi=yes,
154 g77_cv_sys_sprintf_ansi=no,
155 g77_cv_sys_sprintf_ansi=no)
156 AC_CACHE_VAL(g77_cv_sys_sprintf_ansi,
157 g77_cv_sys_sprintf_ansi=$g77_cv_sys_sprintf_ansi)
158 dnl We get a misleading `(cached)' message...
159 AC_MSG_RESULT($g77_cv_sys_sprintf_ansi)
161 # The cygwin patch takes steps to avoid defining USE_STRLEN here -- I don't
163 if test $g77_cv_sys_sprintf_ansi != yes; then
164 AC_DEFINE(USE_STRLEN)
167 # define NON_ANSI_RW_MODES on unix (can't hurt)
168 AC_MSG_CHECKING(NON_ANSI_RW_MODES)
179 ], is_unix=yes, is_unix=no)
180 # NON_ANSI_RW_MODES shouldn't be necessary on cygwin for binary mounts.
181 if test $g77_cv_sys_cygwin32 = yes || test $g77_cv_sys_mingw32 = yes; then
184 if test $is_unix = yes; then
185 AC_DEFINE(NON_ANSI_RW_MODES)
192 # This EOF_CHAR is a misfeature on unix.
193 AC_DEFINE(NO_EOF_CHAR_CHECK)
195 AC_DEFINE(Skip_f2c_Undefs)
199 dnl We might have configuration options to:
200 dnl * change unit preconnexion in err.c (f_init.c)
202 dnl * -DOMIT_BLANK_CC
205 dnl comment-start: "dnl "
207 dnl comment-start-skip: "\\bdnl\\b\\s *"