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# Process this file with autoconf to produce a configure script.
# Copyright (C) 1995, 1997, 1998 Free Software Foundation, Inc.
# Contributed by Dave Love (d.love@dl.ac.uk).
#
#This file is part of GNU Fortran.
#
#GNU Fortran is free software; you can redistribute it and/or modify
#it under the terms of the GNU General Public License as published by
#the Free Software Foundation; either version 2, or (at your option)
#any later version.
#
#GNU Fortran is distributed in the hope that it will be useful,
#but WITHOUT ANY WARRANTY; without even the implied warranty of
#MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
#GNU General Public License for more details.
#
#You should have received a copy of the GNU General Public License
#along with GNU Fortran; see the file COPYING. If not, write to
#the Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA
#02111-1307, USA.
AC_PREREQ(2.12.1)
AC_INIT(ftell_.c)
dnl Checks for programs.
dnl FIXME AC_PROG_CC wants CC to be able to link things, but it may
dnl not be able to.
define([AC_PROG_CC_WORKS],[])
# For g77 we'll set CC to point at the built gcc, but this will get it into
# the makefiles
AC_PROG_CC
test "$AR" || AR=ar
AC_SUBST(AR)
AC_PROG_MAKE_SET
dnl Checks for libraries.
dnl Checks for header files.
# Sanity check for the cross-compilation case:
AC_CHECK_HEADER(stdio.h,:,
[AC_MSG_ERROR([Can't find stdio.h.
You must have a usable C system for the target already installed, at least
including headers and, preferably, the library, before you can configure
the G77 runtime system. If necessary, install gcc now with \`LANGUAGES=c',
then the target library, then build with \`LANGUAGES=f77'.])])
AC_HEADER_STDC
dnl We could do this if we didn't know we were using gcc
dnl AC_MSG_CHECKING(for prototype-savvy compiler)
dnl AC_CACHE_VAL(g77_cv_sys_proto,
dnl [AC_TRY_LINK(,
dnl dnl looks screwy because TRY_LINK expects a function body
dnl [return 0;} int foo (int * bar) {],
dnl g77_cv_sys_proto=yes,
dnl [g77_cv_sys_proto=no
dnl AC_DEFINE(KR_headers)])])
dnl AC_MSG_RESULT($g77_cv_sys_proto)
AC_MSG_CHECKING(for posix)
AC_CACHE_VAL(g77_cv_header_posix,
AC_EGREP_CPP(yes,
[#include <sys/types.h>
#include <unistd.h>
#ifdef _POSIX_VERSION
yes
#endif
],
g77_cv_header_posix=yes,
g77_cv_header_posix=no))
AC_MSG_RESULT($g77_cv_header_posix)
# We can rely on the GNU library being posix-ish. I guess checking the
# header isn't actually like checking the functions, though...
AC_MSG_CHECKING(for GNU library)
AC_CACHE_VAL(g77_cv_lib_gnu,
AC_EGREP_CPP(yes,
[#include <stdio.h>
#ifdef __GNU_LIBRARY__
yes
#endif
],
g77_cv_lib_gnu=yes, g77_cv_lib_gnu=no))
AC_MSG_RESULT($g77_cv_lib_gnu)
# Apparently cygwin needs to be special-cased.
AC_MSG_CHECKING([for cyg\`win'32])
AC_CACHE_VAL(g77_cv_sys_cygwin32,
AC_EGREP_CPP(yes,
[#ifdef __CYGWIN32__
yes
#endif
],
g77_cv_sys_cygwin32=yes,
g77_cv_sys_cygwin32=no))
AC_MSG_RESULT($g77_cv_sys_cygwin32)
# ditto for mingw32.
AC_MSG_CHECKING([for mingw32])
AC_CACHE_VAL(g77_cv_sys_mingw32,
AC_EGREP_CPP(yes,
[#ifdef __MINGW32__
yes
#endif
],
g77_cv_sys_mingw32=yes,
g77_cv_sys_mingw32=no))
AC_MSG_RESULT($g77_cv_sys_mingw32)
AC_CHECK_HEADER(fcntl.h,
test $g77_cv_header_posix = yes && AC_DEFINE(_POSIX_SOURCE),
AC_DEFINE(NO_FCNTL) AC_DEFINE(OPEN_DECL))
dnl Checks for typedefs, structures, and compiler characteristics.
AC_C_CONST
AC_TYPE_SIZE_T
dnl Checks for library functions.
# This should always succeed on unix.
# Apparently positive result on cygwin loses re. NON_UNIX_STDIO
# (as of cygwin b18). Likewise on mingw.
AC_CHECK_FUNC(fstat)
AC_MSG_CHECKING([need for NON_UNIX_STDIO])
if test $g77_cv_sys_cygwin32 = yes \
|| test $g77_cv_sys_mingw32 = yes \
|| test $ac_cv_func_fstat = no; then
AC_MSG_RESULT(yes)
AC_DEFINE(NON_UNIX_STDIO)
else
AC_MSG_RESULT(no)
fi
AC_CHECK_FUNCS(mkstemp)
AC_CHECK_FUNCS(tempnam)
# posix will guarantee the right behaviour for sprintf, else we can't be
# sure; HEADER_STDC wouldn't be the right check in sunos4, for instance.
# However, on my sunos4/gcc setup unistd.h leads us wrongly to believe
# we're posix-conformant, so always do the test.
AC_MSG_CHECKING(for ansi/posix sprintf result)
dnl This loses if included as an argument to AC_CACHE_VAL because the
dnl changequote doesn't take effect and the [] vanish.
dnl fixme: use cached value
AC_TRY_RUN(changequote(<<, >>)dnl
<<#include <stdio.h>
/* does sprintf return the number of chars transferred? */
main () {char foo[2]; (sprintf(foo, "1") == 1) ? exit(0) : exit(1);}
>>changequote([, ]),
g77_cv_sys_sprintf_ansi=yes,
g77_cv_sys_sprintf_ansi=no,
g77_cv_sys_sprintf_ansi=no)
AC_CACHE_VAL(g77_cv_sys_sprintf_ansi,
g77_cv_sys_sprintf_ansi=$g77_cv_sys_sprintf_ansi)
dnl We get a misleading `(cached)' message...
AC_MSG_RESULT($g77_cv_sys_sprintf_ansi)
# The cygwin patch takes steps to avoid defining USE_STRLEN here -- I don't
# understand why.
if test $g77_cv_sys_sprintf_ansi != yes; then
AC_DEFINE(USE_STRLEN)
fi
# define NON_ANSI_RW_MODES on unix (can't hurt)
AC_MSG_CHECKING(NON_ANSI_RW_MODES)
AC_EGREP_CPP(yes,
[#ifdef unix
yes
#endif
#ifdef __unix
yes
#endif
#ifdef __unix__
yes
#endif
], is_unix=yes, is_unix=no)
# NON_ANSI_RW_MODES shouldn't be necessary on cygwin for binary mounts.
if test $g77_cv_sys_cygwin32 = yes || test $g77_cv_sys_mingw32 = yes; then
AC_MSG_RESULT(no)
else
if test $is_unix = yes; then
AC_DEFINE(NON_ANSI_RW_MODES)
AC_MSG_RESULT(yes)
else
AC_MSG_RESULT(no)
fi
fi
# This EOF_CHAR is a misfeature on unix.
AC_DEFINE(NO_EOF_CHAR_CHECK)
AC_DEFINE(Skip_f2c_Undefs)
AC_OUTPUT(Makefile)
dnl We might have configuration options to:
dnl * change unit preconnexion in err.c (f_init.c)
dnl * -DALWAYS_FLUSH
dnl * -DOMIT_BLANK_CC
dnl Local Variables:
dnl comment-start: "dnl "
dnl comment-end: ""
dnl comment-start-skip: "\\bdnl\\b\\s *"
dnl End:
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