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 # 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])
35 dnl Checks for programs.
37 dnl FIXME AC_PROG_CC wants CC to be able to link things, but it may
39 define([AC_PROG_CC_WORKS],[])
41 # For g77 we'll set CC to point at the built gcc, but this will get it into
45 LIBTOOL='$(SHELL) ../libtool'
52 dnl Checks for libraries.
54 dnl Checks for header files.
55 # Sanity check for the cross-compilation case:
56 AC_CHECK_HEADER(stdio.h,:,
57 [AC_MSG_ERROR([Can't find stdio.h.
58 You must have a usable C system for the target already installed, at least
59 including headers and, preferably, the library, before you can configure
60 the G77 runtime system. If necessary, install gcc now with \`LANGUAGES=c',
61 then the target library, then build with \`LANGUAGES=f77'.])])
64 dnl We could do this if we didn't know we were using gcc
65 dnl AC_MSG_CHECKING(for prototype-savvy compiler)
66 dnl AC_CACHE_VAL(g77_cv_sys_proto,
68 dnl dnl looks screwy because TRY_LINK expects a function body
69 dnl [return 0;} int foo (int * bar) {],
70 dnl g77_cv_sys_proto=yes,
71 dnl [g77_cv_sys_proto=no
72 dnl AC_DEFINE(KR_headers)])])
73 dnl AC_MSG_RESULT($g77_cv_sys_proto)
75 AC_MSG_CHECKING(for posix)
76 AC_CACHE_VAL(g77_cv_header_posix,
78 [#include <sys/types.h>
84 g77_cv_header_posix=yes,
85 g77_cv_header_posix=no))
86 AC_MSG_RESULT($g77_cv_header_posix)
88 # We can rely on the GNU library being posix-ish. I guess checking the
89 # header isn't actually like checking the functions, though...
90 AC_MSG_CHECKING(for GNU library)
91 AC_CACHE_VAL(g77_cv_lib_gnu,
94 #ifdef __GNU_LIBRARY__
98 g77_cv_lib_gnu=yes, g77_cv_lib_gnu=no))
99 AC_MSG_RESULT($g77_cv_lib_gnu)
101 # Apparently cygwin needs to be special-cased.
102 AC_MSG_CHECKING([for cyg\`win'32])
103 AC_CACHE_VAL(g77_cv_sys_cygwin32,
109 g77_cv_sys_cygwin32=yes,
110 g77_cv_sys_cygwin32=no))
111 AC_MSG_RESULT($g77_cv_sys_cygwin32)
114 AC_MSG_CHECKING([for mingw32])
115 AC_CACHE_VAL(g77_cv_sys_mingw32,
121 g77_cv_sys_mingw32=yes,
122 g77_cv_sys_mingw32=no))
123 AC_MSG_RESULT($g77_cv_sys_mingw32)
126 AC_CHECK_HEADER(fcntl.h,
127 test $g77_cv_header_posix = yes && AC_DEFINE(_POSIX_SOURCE),
128 AC_DEFINE(NO_FCNTL, 1, [Define if fcntl.h is missing.])
129 AC_DEFINE(OPEN_DECL, 1, [Define if fcntl.h is missing.]))
131 dnl Checks for typedefs, structures, and compiler characteristics.
135 dnl Checks for library functions.
137 # This should always succeed on unix.
138 # Apparently positive result on cygwin loses re. NON_UNIX_STDIO
139 # (as of cygwin b18). Likewise on mingw.
141 AC_MSG_CHECKING([need for NON_UNIX_STDIO])
142 if test $g77_cv_sys_cygwin32 = yes \
143 || test $g77_cv_sys_mingw32 = yes \
144 || test $ac_cv_func_fstat = no; then
146 AC_DEFINE(NON_UNIX_STDIO, 1, [Define if we do not have Unix Stdio.])
151 AC_CHECK_FUNCS(fseeko)
152 AC_CHECK_FUNCS(ftello)
153 AC_CHECK_FUNCS(ftruncate)
154 AC_CHECK_FUNCS(mkstemp)
155 AC_CHECK_FUNCS(tempnam)
157 # posix will guarantee the right behaviour for sprintf, else we can't be
158 # sure; HEADER_STDC wouldn't be the right check in sunos4, for instance.
159 # However, on my sunos4/gcc setup unistd.h leads us wrongly to believe
160 # we're posix-conformant, so always do the test.
161 AC_MSG_CHECKING(for ansi/posix sprintf result)
162 dnl This loses if included as an argument to AC_CACHE_VAL because the
163 dnl changequote doesn't take effect and the [] vanish.
164 dnl fixme: use cached value
165 AC_TRY_RUN(changequote(<<, >>)dnl
167 /* does sprintf return the number of chars transferred? */
168 main () {char foo[2]; (sprintf(foo, "1") == 1) ? exit(0) : exit(1);}
170 g77_cv_sys_sprintf_ansi=yes,
171 g77_cv_sys_sprintf_ansi=no,
172 g77_cv_sys_sprintf_ansi=no)
173 AC_CACHE_VAL(g77_cv_sys_sprintf_ansi,
174 g77_cv_sys_sprintf_ansi=$g77_cv_sys_sprintf_ansi)
175 dnl We get a misleading `(cached)' message...
176 AC_MSG_RESULT($g77_cv_sys_sprintf_ansi)
178 # The cygwin patch takes steps to avoid defining USE_STRLEN here -- I don't
180 if test $g77_cv_sys_sprintf_ansi != yes; then
181 AC_DEFINE(USE_STRLEN, 1, [Define if we use strlen.])
184 # define NON_ANSI_RW_MODES on unix (can't hurt)
185 AC_MSG_CHECKING(NON_ANSI_RW_MODES)
196 ], is_unix=yes, is_unix=no)
197 # NON_ANSI_RW_MODES shouldn't be necessary on cygwin for binary mounts.
198 if test $g77_cv_sys_cygwin32 = yes || test $g77_cv_sys_mingw32 = yes; then
201 if test $is_unix = yes; then
202 AC_DEFINE(NON_ANSI_RW_MODES, 1, [Define if we have non ANSI RW modes.])
209 # This EOF_CHAR is a misfeature on unix.
210 AC_DEFINE(NO_EOF_CHAR_CHECK, 1, [Always defined.])
214 AC_DEFINE(Skip_f2c_Undefs, 1, [Define to skip f2c undefs.])
218 dnl We might have configuration options to:
219 dnl * change unit preconnexion in err.c (f_init.c)
221 dnl * -DOMIT_BLANK_CC
224 dnl comment-start: "dnl "
226 dnl comment-start-skip: "\\bdnl\\b\\s *"