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.
26 # For g77 we'll set CC to point at the built gcc, but this will get it into
34 dnl Checks for libraries.
36 dnl Checks for header files.
37 # Sanity check for the cross-compilation case:
38 AC_CHECK_HEADER(stdio.h,:,
39 [AC_MSG_ERROR([Can't find stdio.h.
40 You must have a usable C system for the target already installed, at least
41 including headers and, preferably, the library, before you can configure
42 the G77 runtime system. If necessary, install gcc now with \`LANGUAGES=c',
43 then the target library, then build with \`LANGUAGES=f77'.])])
46 dnl We could do this if we didn't know we were using gcc
47 dnl AC_MSG_CHECKING(for prototype-savvy compiler)
48 dnl AC_CACHE_VAL(g77_cv_sys_proto,
50 dnl dnl looks screwy because TRY_LINK expects a function body
51 dnl [return 0;} int foo (int * bar) {],
52 dnl g77_cv_sys_proto=yes,
53 dnl [g77_cv_sys_proto=no
54 dnl AC_DEFINE(KR_headers)])])
55 dnl AC_MSG_RESULT($g77_cv_sys_proto)
57 AC_MSG_CHECKING(for posix)
58 AC_CACHE_VAL(g77_cv_header_posix,
60 [#include <sys/types.h>
66 g77_cv_header_posix=yes,
67 g77_cv_header_posix=no))
68 AC_MSG_RESULT($g77_cv_header_posix)
70 # We can rely on the GNU library being posix-ish. I guess checking the
71 # header isn't actually like checking the functions, though...
72 AC_MSG_CHECKING(for GNU library)
73 AC_CACHE_VAL(g77_cv_lib_gnu,
76 #ifdef __GNU_LIBRARY__
80 g77_cv_lib_gnu=yes, g77_cv_lib_gnu=no))
81 AC_MSG_RESULT($g77_cv_lib_gnu)
83 # Apparently cygwin needs to be special-cased.
84 AC_MSG_CHECKING([for cyg\`win'32])
85 AC_CACHE_VAL(g77_cv_sys_cygwin32,
91 g77_cv_sys_cygwin32=yes,
92 g77_cv_sys_cygwin32=no))
93 AC_MSG_RESULT($g77_cv_sys_cygwin32)
96 AC_MSG_CHECKING([for mingw32])
97 AC_CACHE_VAL(g77_cv_sys_mingw32,
103 g77_cv_sys_mingw32=yes,
104 g77_cv_sys_mingw32=no))
105 AC_MSG_RESULT($g77_cv_sys_mingw32)
108 AC_CHECK_HEADER(fcntl.h,
109 test $g77_cv_header_posix = yes && AC_DEFINE(_POSIX_SOURCE),
110 AC_DEFINE(NO_FCNTL) AC_DEFINE(OPEN_DECL))
112 dnl Checks for typedefs, structures, and compiler characteristics.
116 dnl Checks for library functions.
118 # This should always succeed on unix.
119 # Apparently positive result on cygwin loses re. NON_UNIX_STDIO
120 # (as of cygwin b18). Likewise on mingw.
122 AC_MSG_CHECKING([need for NON_UNIX_STDIO])
123 if test $g77_cv_sys_cygwin32 = yes \
124 || test $g77_cv_sys_mingw32 = yes \
125 || test $ac_cv_func_fstat = no; then
127 AC_DEFINE(NON_UNIX_STDIO)
132 AC_CHECK_FUNCS(tempnam)
134 # posix will guarantee the right behaviour for sprintf, else we can't be
135 # sure; HEADER_STDC wouldn't be the right check in sunos4, for instance.
136 # However, on my sunos4/gcc setup unistd.h leads us wrongly to believe
137 # we're posix-conformant, so always do the test.
138 AC_MSG_CHECKING(for ansi/posix sprintf result)
139 dnl This loses if included as an argument to AC_CACHE_VAL because the
140 dnl changequote doesn't take effect and the [] vanish.
141 dnl fixme: use cached value
142 AC_TRY_RUN(changequote(<<, >>)dnl
144 /* does sprintf return the number of chars transferred? */
145 main () {char foo[2]; (sprintf(foo, "1") == 1) ? exit(0) : exit(1);}
147 g77_cv_sys_sprintf_ansi=yes,
148 g77_cv_sys_sprintf_ansi=no,
149 g77_cv_sys_sprintf_ansi=no)
150 AC_CACHE_VAL(g77_cv_sys_sprintf_ansi,
151 g77_cv_sys_sprintf_ansi=$g77_cv_sys_sprintf_ansi)
152 dnl We get a misleading `(cached)' message...
153 AC_MSG_RESULT($g77_cv_sys_sprintf_ansi)
155 # The cygwin patch takes steps to avoid defining USE_STRLEN here -- I don't
157 if test $g77_cv_sys_sprintf_ansi != yes; then
158 AC_DEFINE(USE_STRLEN)
161 # define NON_ANSI_RW_MODES on unix (can't hurt)
162 AC_MSG_CHECKING(NON_ANSI_RW_MODES)
173 ], is_unix=yes, is_unix=no)
174 # NON_ANSI_RW_MODES shouldn't be necessary on cygwin for binary mounts.
175 if test $g77_cv_sys_cygwin32 = yes || test $g77_cv_sys_mingw32 = yes; then
178 if test $is_unix = yes; then
179 AC_DEFINE(NON_ANSI_RW_MODES)
186 # This EOF_CHAR is a misfeature on unix.
187 AC_DEFINE(NO_EOF_CHAR_CHECK)
189 AC_DEFINE(Skip_f2c_Undefs)
193 dnl We might have configuration options to:
194 dnl * change unit preconnexion in err.c (f_init.c)
196 dnl * -DOMIT_BLANK_CC
199 dnl comment-start: "dnl "
201 dnl comment-start-skip: "\\bdnl\\b\\s *"