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 # 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 AC_DEFINE(_FILE_OFFSET_BITS, 64, [Get 64-bit file size support])
33 dnl Checks for programs.
35 dnl FIXME AC_PROG_CC wants CC to be able to link things, but it may
37 define([AC_PROG_CC_WORKS],[])
39 # For g77 we'll set CC to point at the built gcc, but this will get it into
47 dnl Checks for libraries.
49 dnl Checks for header files.
50 # Sanity check for the cross-compilation case:
51 AC_CHECK_HEADER(stdio.h,:,
52 [AC_MSG_ERROR([Can't find stdio.h.
53 You must have a usable C system for the target already installed, at least
54 including headers and, preferably, the library, before you can configure
55 the G77 runtime system. If necessary, install gcc now with \`LANGUAGES=c',
56 then the target library, then build with \`LANGUAGES=f77'.])])
59 dnl We could do this if we didn't know we were using gcc
60 dnl AC_MSG_CHECKING(for prototype-savvy compiler)
61 dnl AC_CACHE_VAL(g77_cv_sys_proto,
63 dnl dnl looks screwy because TRY_LINK expects a function body
64 dnl [return 0;} int foo (int * bar) {],
65 dnl g77_cv_sys_proto=yes,
66 dnl [g77_cv_sys_proto=no
67 dnl AC_DEFINE(KR_headers)])])
68 dnl AC_MSG_RESULT($g77_cv_sys_proto)
70 AC_MSG_CHECKING(for posix)
71 AC_CACHE_VAL(g77_cv_header_posix,
73 [#include <sys/types.h>
79 g77_cv_header_posix=yes,
80 g77_cv_header_posix=no))
81 AC_MSG_RESULT($g77_cv_header_posix)
83 # We can rely on the GNU library being posix-ish. I guess checking the
84 # header isn't actually like checking the functions, though...
85 AC_MSG_CHECKING(for GNU library)
86 AC_CACHE_VAL(g77_cv_lib_gnu,
89 #ifdef __GNU_LIBRARY__
93 g77_cv_lib_gnu=yes, g77_cv_lib_gnu=no))
94 AC_MSG_RESULT($g77_cv_lib_gnu)
96 # Apparently cygwin needs to be special-cased.
97 AC_MSG_CHECKING([for cyg\`win'32])
98 AC_CACHE_VAL(g77_cv_sys_cygwin32,
104 g77_cv_sys_cygwin32=yes,
105 g77_cv_sys_cygwin32=no))
106 AC_MSG_RESULT($g77_cv_sys_cygwin32)
109 AC_MSG_CHECKING([for mingw32])
110 AC_CACHE_VAL(g77_cv_sys_mingw32,
116 g77_cv_sys_mingw32=yes,
117 g77_cv_sys_mingw32=no))
118 AC_MSG_RESULT($g77_cv_sys_mingw32)
121 AC_CHECK_HEADER(fcntl.h,
122 test $g77_cv_header_posix = yes && AC_DEFINE(_POSIX_SOURCE),
123 AC_DEFINE(NO_FCNTL, 1, [Define if fcntl.h is missing.])
124 AC_DEFINE(OPEN_DECL, 1, [Define if fcntl.h is missing.]))
126 dnl Checks for typedefs, structures, and compiler characteristics.
130 dnl Checks for library functions.
132 # This should always succeed on unix.
133 # Apparently positive result on cygwin loses re. NON_UNIX_STDIO
134 # (as of cygwin b18). Likewise on mingw.
136 AC_MSG_CHECKING([need for NON_UNIX_STDIO])
137 if test $g77_cv_sys_cygwin32 = yes \
138 || test $g77_cv_sys_mingw32 = yes \
139 || test $ac_cv_func_fstat = no; then
141 AC_DEFINE(NON_UNIX_STDIO, 1, [Define if we do not have Unix Stdio.])
146 AC_CHECK_FUNCS(fseeko)
147 AC_CHECK_FUNCS(ftello)
148 AC_CHECK_FUNCS(ftruncate)
149 AC_CHECK_FUNCS(mkstemp)
150 AC_CHECK_FUNCS(tempnam)
152 # posix will guarantee the right behaviour for sprintf, else we can't be
153 # sure; HEADER_STDC wouldn't be the right check in sunos4, for instance.
154 # However, on my sunos4/gcc setup unistd.h leads us wrongly to believe
155 # we're posix-conformant, so always do the test.
156 AC_MSG_CHECKING(for ansi/posix sprintf result)
157 dnl This loses if included as an argument to AC_CACHE_VAL because the
158 dnl changequote doesn't take effect and the [] vanish.
159 dnl fixme: use cached value
160 AC_TRY_RUN(changequote(<<, >>)dnl
162 /* does sprintf return the number of chars transferred? */
163 main () {char foo[2]; (sprintf(foo, "1") == 1) ? exit(0) : exit(1);}
165 g77_cv_sys_sprintf_ansi=yes,
166 g77_cv_sys_sprintf_ansi=no,
167 g77_cv_sys_sprintf_ansi=no)
168 AC_CACHE_VAL(g77_cv_sys_sprintf_ansi,
169 g77_cv_sys_sprintf_ansi=$g77_cv_sys_sprintf_ansi)
170 dnl We get a misleading `(cached)' message...
171 AC_MSG_RESULT($g77_cv_sys_sprintf_ansi)
173 # The cygwin patch takes steps to avoid defining USE_STRLEN here -- I don't
175 if test $g77_cv_sys_sprintf_ansi != yes; then
176 AC_DEFINE(USE_STRLEN, 1, [Define if we use strlen.])
179 # define NON_ANSI_RW_MODES on unix (can't hurt)
180 AC_MSG_CHECKING(NON_ANSI_RW_MODES)
191 ], is_unix=yes, is_unix=no)
192 # NON_ANSI_RW_MODES shouldn't be necessary on cygwin for binary mounts.
193 if test $g77_cv_sys_cygwin32 = yes || test $g77_cv_sys_mingw32 = yes; then
196 if test $is_unix = yes; then
197 AC_DEFINE(NON_ANSI_RW_MODES, 1, [Define if we have non ANSI RW modes.])
204 # This EOF_CHAR is a misfeature on unix.
205 AC_DEFINE(NO_EOF_CHAR_CHECK, 1, [Always defined.])
209 AC_DEFINE(Skip_f2c_Undefs, 1, [Define to skip f2c undefs.])
213 dnl We might have configuration options to:
214 dnl * change unit preconnexion in err.c (f_init.c)
216 dnl * -DOMIT_BLANK_CC
219 dnl comment-start: "dnl "
221 dnl comment-start-skip: "\\bdnl\\b\\s *"