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
24 AC_CONFIG_HEADER(config.h)
26 dnl Checks for programs.
28 dnl FIXME AC_PROG_CC wants CC to be able to link things, but it may
30 define([AC_PROG_CC_WORKS],[])
32 # For g77 we'll set CC to point at the built gcc, but this will get it into
40 dnl Checks for libraries.
42 dnl Checks for header files.
43 # Sanity check for the cross-compilation case:
44 AC_CHECK_HEADER(stdio.h,:,
45 [AC_MSG_ERROR([Can't find stdio.h.
46 You must have a usable C system for the target already installed, at least
47 including headers and, preferably, the library, before you can configure
48 the G77 runtime system. If necessary, install gcc now with \`LANGUAGES=c',
49 then the target library, then build with \`LANGUAGES=f77'.])])
52 dnl We could do this if we didn't know we were using gcc
53 dnl AC_MSG_CHECKING(for prototype-savvy compiler)
54 dnl AC_CACHE_VAL(g77_cv_sys_proto,
56 dnl dnl looks screwy because TRY_LINK expects a function body
57 dnl [return 0;} int foo (int * bar) {],
58 dnl g77_cv_sys_proto=yes,
59 dnl [g77_cv_sys_proto=no
60 dnl AC_DEFINE(KR_headers)])])
61 dnl AC_MSG_RESULT($g77_cv_sys_proto)
63 AC_MSG_CHECKING(for posix)
64 AC_CACHE_VAL(g77_cv_header_posix,
66 [#include <sys/types.h>
72 g77_cv_header_posix=yes,
73 g77_cv_header_posix=no))
74 AC_MSG_RESULT($g77_cv_header_posix)
76 # We can rely on the GNU library being posix-ish. I guess checking the
77 # header isn't actually like checking the functions, though...
78 AC_MSG_CHECKING(for GNU library)
79 AC_CACHE_VAL(g77_cv_lib_gnu,
82 #ifdef __GNU_LIBRARY__
86 g77_cv_lib_gnu=yes, g77_cv_lib_gnu=no))
87 AC_MSG_RESULT($g77_cv_lib_gnu)
89 # Apparently cygwin needs to be special-cased.
90 AC_MSG_CHECKING([for cyg\`win'32])
91 AC_CACHE_VAL(g77_cv_sys_cygwin32,
97 g77_cv_sys_cygwin32=yes,
98 g77_cv_sys_cygwin32=no))
99 AC_MSG_RESULT($g77_cv_sys_cygwin32)
102 AC_MSG_CHECKING([for mingw32])
103 AC_CACHE_VAL(g77_cv_sys_mingw32,
109 g77_cv_sys_mingw32=yes,
110 g77_cv_sys_mingw32=no))
111 AC_MSG_RESULT($g77_cv_sys_mingw32)
114 AC_CHECK_HEADER(fcntl.h,
115 test $g77_cv_header_posix = yes && AC_DEFINE(_POSIX_SOURCE),
116 AC_DEFINE(NO_FCNTL, 1, [Define if fcntl.h is missing.])
117 AC_DEFINE(OPEN_DECL, 1, [Define if fcntl.h is missing.]))
119 dnl Checks for typedefs, structures, and compiler characteristics.
123 dnl Checks for library functions.
125 # This should always succeed on unix.
126 # Apparently positive result on cygwin loses re. NON_UNIX_STDIO
127 # (as of cygwin b18). Likewise on mingw.
129 AC_MSG_CHECKING([need for NON_UNIX_STDIO])
130 if test $g77_cv_sys_cygwin32 = yes \
131 || test $g77_cv_sys_mingw32 = yes \
132 || test $ac_cv_func_fstat = no; then
134 AC_DEFINE(NON_UNIX_STDIO, 1, [Define if we do not have Unix Stdio.])
139 AC_CHECK_FUNCS(ftruncate)
140 AC_CHECK_FUNCS(mkstemp)
141 AC_CHECK_FUNCS(tempnam)
143 # posix will guarantee the right behaviour for sprintf, else we can't be
144 # sure; HEADER_STDC wouldn't be the right check in sunos4, for instance.
145 # However, on my sunos4/gcc setup unistd.h leads us wrongly to believe
146 # we're posix-conformant, so always do the test.
147 AC_MSG_CHECKING(for ansi/posix sprintf result)
148 dnl This loses if included as an argument to AC_CACHE_VAL because the
149 dnl changequote doesn't take effect and the [] vanish.
150 dnl fixme: use cached value
151 AC_TRY_RUN(changequote(<<, >>)dnl
153 /* does sprintf return the number of chars transferred? */
154 main () {char foo[2]; (sprintf(foo, "1") == 1) ? exit(0) : exit(1);}
156 g77_cv_sys_sprintf_ansi=yes,
157 g77_cv_sys_sprintf_ansi=no,
158 g77_cv_sys_sprintf_ansi=no)
159 AC_CACHE_VAL(g77_cv_sys_sprintf_ansi,
160 g77_cv_sys_sprintf_ansi=$g77_cv_sys_sprintf_ansi)
161 dnl We get a misleading `(cached)' message...
162 AC_MSG_RESULT($g77_cv_sys_sprintf_ansi)
164 # The cygwin patch takes steps to avoid defining USE_STRLEN here -- I don't
166 if test $g77_cv_sys_sprintf_ansi != yes; then
167 AC_DEFINE(USE_STRLEN, 1, [Define if we use strlen.])
170 # define NON_ANSI_RW_MODES on unix (can't hurt)
171 AC_MSG_CHECKING(NON_ANSI_RW_MODES)
182 ], is_unix=yes, is_unix=no)
183 # NON_ANSI_RW_MODES shouldn't be necessary on cygwin for binary mounts.
184 if test $g77_cv_sys_cygwin32 = yes || test $g77_cv_sys_mingw32 = yes; then
187 if test $is_unix = yes; then
188 AC_DEFINE(NON_ANSI_RW_MODES, 1, [Define if we have non ANSI RW modes.])
195 # This EOF_CHAR is a misfeature on unix.
196 AC_DEFINE(NO_EOF_CHAR_CHECK, 1, [Always defined.])
200 AC_DEFINE(Skip_f2c_Undefs, 1, [Define to skip f2c undefs.])
204 dnl We might have configuration options to:
205 dnl * change unit preconnexion in err.c (f_init.c)
207 dnl * -DOMIT_BLANK_CC
210 dnl comment-start: "dnl "
212 dnl comment-start-skip: "\\bdnl\\b\\s *"