1 # Process this file with autoconf to produce a configure script.
2 # Copyright (C) 1995, 1997, 1998, 2001, 2002 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 # These defines are necessary to get 64-bit file size support.
28 AC_DEFINE(_XOPEN_SOURCE, 500L, [Get Single Unix Specification semantics])
29 # The following is needed by irix6.2 so that struct timeval is declared.
30 AC_DEFINE(_XOPEN_SOURCE_EXTENDED, 1, [Get Single Unix Specification semantics])
31 # The following is needed by Solaris2.5.1 so that struct timeval is declared.
32 AC_DEFINE(__EXTENSIONS__, 1, [Solaris extensions])
33 AC_DEFINE(_FILE_OFFSET_BITS, 64, [Get 64-bit file size support])
34 AC_DEFINE(_LARGEFILE_SOURCE, 1, [Define for HP-UX ftello and fseeko extension.])
36 dnl Checks for programs.
38 dnl FIXME AC_PROG_CC wants CC to be able to link things, but it may
40 define([AC_PROG_CC_WORKS],[])
42 # For g77 we'll set CC to point at the built gcc, but this will get it into
46 LIBTOOL='$(SHELL) ../libtool'
53 dnl Checks for libraries.
55 dnl Checks for header files.
56 # Sanity check for the cross-compilation case:
57 AC_CHECK_HEADER(stdio.h,:,
58 [AC_MSG_ERROR([Can't find stdio.h.
59 You must have a usable C system for the target already installed, at least
60 including headers and, preferably, the library, before you can configure
61 the G77 runtime system. If necessary, install gcc now with \`LANGUAGES=c',
62 then the target library, then build with \`LANGUAGES=f77'.])])
65 AC_MSG_CHECKING(for posix)
66 AC_CACHE_VAL(g77_cv_header_posix,
68 [#include <sys/types.h>
74 g77_cv_header_posix=yes,
75 g77_cv_header_posix=no))
76 AC_MSG_RESULT($g77_cv_header_posix)
78 # We can rely on the GNU library being posix-ish. I guess checking the
79 # header isn't actually like checking the functions, though...
80 AC_MSG_CHECKING(for GNU library)
81 AC_CACHE_VAL(g77_cv_lib_gnu,
84 #ifdef __GNU_LIBRARY__
88 g77_cv_lib_gnu=yes, g77_cv_lib_gnu=no))
89 AC_MSG_RESULT($g77_cv_lib_gnu)
91 # Apparently cygwin needs to be special-cased.
92 AC_MSG_CHECKING([for cyg\`win'32])
93 AC_CACHE_VAL(g77_cv_sys_cygwin32,
99 g77_cv_sys_cygwin32=yes,
100 g77_cv_sys_cygwin32=no))
101 AC_MSG_RESULT($g77_cv_sys_cygwin32)
104 AC_MSG_CHECKING([for mingw32])
105 AC_CACHE_VAL(g77_cv_sys_mingw32,
111 g77_cv_sys_mingw32=yes,
112 g77_cv_sys_mingw32=no))
113 AC_MSG_RESULT($g77_cv_sys_mingw32)
116 dnl Checks for typedefs, structures, and compiler characteristics.
120 dnl Checks for library functions.
122 # This should always succeed on unix.
123 # Apparently positive result on cygwin loses re. NON_UNIX_STDIO
124 # (as of cygwin b18). Likewise on mingw.
126 AC_MSG_CHECKING([need for NON_UNIX_STDIO])
127 if test $g77_cv_sys_cygwin32 = yes \
128 || test $g77_cv_sys_mingw32 = yes \
129 || test $ac_cv_func_fstat = no; then
131 AC_DEFINE(NON_UNIX_STDIO, 1, [Define if we do not have Unix Stdio.])
136 AC_CHECK_FUNCS(fseeko)
137 AC_CHECK_FUNCS(ftello)
138 AC_CHECK_FUNCS(ftruncate)
139 AC_CHECK_FUNCS(mkstemp)
140 AC_CHECK_FUNCS(tempnam)
141 AC_CHECK_FUNCS(tmpnam)
143 # posix will guarantee the right behaviour for sprintf, else we can't be
144 # sure; HEADER_STDC wouldn't be the right check in sunos4, for instance.
145 # However, on my sunos4/gcc setup unistd.h leads us wrongly to believe
146 # we're posix-conformant, so always do the test.
147 AC_MSG_CHECKING(for ansi/posix sprintf result)
148 dnl This loses if included as an argument to AC_CACHE_VAL because the
149 dnl changequote doesn't take effect and the [] vanish.
150 dnl fixme: use cached value
151 AC_TRY_RUN(changequote(<<, >>)dnl
153 /* does sprintf return the number of chars transferred? */
154 main () {char foo[2]; (sprintf(foo, "1") == 1) ? exit(0) : exit(1);}
156 g77_cv_sys_sprintf_ansi=yes,
157 g77_cv_sys_sprintf_ansi=no,
158 g77_cv_sys_sprintf_ansi=no)
159 AC_CACHE_VAL(g77_cv_sys_sprintf_ansi,
160 g77_cv_sys_sprintf_ansi=$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 *"