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