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m4_include(../config/acx.m4)

m4_include(../config/no-executables.m4)

dnl Check that we have a working GNU Fortran compiler

AC_DEFUN([LIBGFOR_WORKING_GFORTRAN], [

AC_MSG_CHECKING([whether the GNU Fortran compiler is working])

AC_LANG_PUSH([Fortran])

AC_COMPILE_IFELSE([[

      program foo

      real, parameter :: bar = sin (12.34 / 2.5)

      end program foo]],

    [AC_MSG_RESULT([yes])],

    [AC_MSG_RESULT([no])

     AC_MSG_ERROR([GNU Fortran is not working; please report a bug in http://gcc.gnu.org/bugzilla, attaching $PWD/config.log])

    ])

AC_LANG_POP([Fortran])

])

sinclude(../libtool.m4)

dnl The lines below arrange for aclocal not to bring an installed

dnl libtool.m4 into aclocal.m4, while still arranging for automake to

dnl add a definition of LIBTOOL to Makefile.in.

ifelse(,,,[AC_SUBST(LIBTOOL)

AC_DEFUN([AM_PROG_LIBTOOL])

AC_DEFUN([AC_LIBTOOL_DLOPEN])

AC_DEFUN([AC_PROG_LD])

])

dnl Check whether the target supports hidden visibility.

AC_DEFUN([LIBGFOR_CHECK_ATTRIBUTE_VISIBILITY], [

  AC_CACHE_CHECK([whether the target supports hidden visibility],

                 libgfor_cv_have_attribute_visibility, [

  save_CFLAGS="$CFLAGS"

  CFLAGS="$CFLAGS -Werror"

  AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[void __attribute__((visibility("hidden"))) foo(void) { }]], [])],

                    libgfor_cv_have_attribute_visibility=yes,

                    libgfor_cv_have_attribute_visibility=no)

  CFLAGS="$save_CFLAGS"])

  if test $libgfor_cv_have_attribute_visibility = yes; then

    AC_DEFINE(HAVE_ATTRIBUTE_VISIBILITY, 1,

      [Define to 1 if the target supports __attribute__((visibility(...))).])

  fi])

dnl Check whether the target supports dllexport

AC_DEFUN([LIBGFOR_CHECK_ATTRIBUTE_DLLEXPORT], [

  AC_CACHE_CHECK([whether the target supports dllexport],

                 libgfor_cv_have_attribute_dllexport, [

  save_CFLAGS="$CFLAGS"

  CFLAGS="$CFLAGS -Werror"

  AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[void __attribute__((dllexport)) foo(void) { }]], [])],

                    libgfor_cv_have_attribute_dllexport=yes,

                    libgfor_cv_have_attribute_dllexport=no)

  CFLAGS="$save_CFLAGS"])

  if test $libgfor_cv_have_attribute_dllexport = yes; then

    AC_DEFINE(HAVE_ATTRIBUTE_DLLEXPORT, 1,

      [Define to 1 if the target supports __attribute__((dllexport)).])

  fi])

dnl Check whether the target supports symbol aliases.

AC_DEFUN([LIBGFOR_CHECK_ATTRIBUTE_ALIAS], [

  AC_CACHE_CHECK([whether the target supports symbol aliases],

                 libgfor_cv_have_attribute_alias, [

  AC_LINK_IFELSE([AC_LANG_PROGRAM([[

void foo(void) { }

extern void bar(void) __attribute__((alias("foo")));]],

    [[bar();]])], libgfor_cv_have_attribute_alias=yes, libgfor_cv_have_attribute_alias=no)])

  if test $libgfor_cv_have_attribute_alias = yes; then

    AC_DEFINE(HAVE_ATTRIBUTE_ALIAS, 1,

      [Define to 1 if the target supports __attribute__((alias(...))).])

  fi])

dnl Check whether the target supports __sync_fetch_and_add.

AC_DEFUN([LIBGFOR_CHECK_SYNC_FETCH_AND_ADD], [

  AC_CACHE_CHECK([whether the target supports __sync_fetch_and_add],

                 libgfor_cv_have_sync_fetch_and_add, [

  AC_LINK_IFELSE([AC_LANG_PROGRAM([[int foovar = 0;]], [[

if (foovar <= 0) return __sync_fetch_and_add (&foovar, 1);

if (foovar > 10) return __sync_add_and_fetch (&foovar, -1);]])],

              libgfor_cv_have_sync_fetch_and_add=yes, libgfor_cv_have_sync_fetch_and_add=no)])

  if test $libgfor_cv_have_sync_fetch_and_add = yes; then

    AC_DEFINE(HAVE_SYNC_FETCH_AND_ADD, 1,

              [Define to 1 if the target supports __sync_fetch_and_add])

  fi])

dnl Check for pragma weak.

AC_DEFUN([LIBGFOR_GTHREAD_WEAK], [

  AC_CACHE_CHECK([whether pragma weak works],

                 libgfor_cv_have_pragma_weak, [

  gfor_save_CFLAGS="$CFLAGS"

  CFLAGS="$CFLAGS -Wunknown-pragmas"

  AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[

void foo (void);

#pragma weak foo

]], [[if (foo) foo ();]])],

                    libgfor_cv_have_pragma_weak=yes, libgfor_cv_have_pragma_weak=no)])

  if test $libgfor_cv_have_pragma_weak = yes; then

    AC_DEFINE(SUPPORTS_WEAK, 1,

              [Define to 1 if the target supports #pragma weak])

  fi

  case "$host" in

    *-*-darwin* | *-*-hpux* | *-*-cygwin* | *-*-mingw* | alpha*-dec-osf* )

      AC_DEFINE(GTHREAD_USE_WEAK, 0,

                [Define to 0 if the target shouldn't use #pragma weak])

      ;;

  esac])

dnl Check whether target can unlink a file still open.

AC_DEFUN([LIBGFOR_CHECK_UNLINK_OPEN_FILE], [

  AC_CACHE_CHECK([whether the target can unlink an open file],

                  libgfor_cv_have_unlink_open_file, [

  AC_RUN_IFELSE([AC_LANG_SOURCE([[

#include <errno.h>

#include <fcntl.h>

#include <unistd.h>

#include <sys/stat.h>

int main ()

{

  int fd;

  fd = open ("testfile", O_RDWR | O_CREAT, S_IWUSR | S_IRUSR);

  if (fd <= 0)

    return 0;

  if (unlink ("testfile") == -1)

    return 1;

  write (fd, "This is a test\n", 15);

  close (fd);

  if (open ("testfile", O_RDONLY) == -1 && errno == ENOENT)

    return 0;

  else

    return 1;

}]])], libgfor_cv_have_unlink_open_file=yes, libgfor_cv_have_unlink_open_file=no, [

case "${target}" in

  *mingw*) libgfor_cv_have_unlink_open_file=no ;;

  *) libgfor_cv_have_unlink_open_file=yes;;

esac])])

if test x"$libgfor_cv_have_unlink_open_file" = xyes; then

  AC_DEFINE(HAVE_UNLINK_OPEN_FILE, 1, [Define if target can unlink open files.])

fi])

dnl Check whether CRLF is the line terminator

AC_DEFUN([LIBGFOR_CHECK_CRLF], [

  AC_CACHE_CHECK([whether the target has CRLF as line terminator],

                  libgfor_cv_have_crlf, [

  AC_RUN_IFELSE([AC_LANG_SOURCE([[

/* This test program should exit with status 0 if system uses a CRLF as

   line terminator, and status 1 otherwise.

   Since it is used to check for mingw systems, and should return 0 in any

   other case, in case of a failure we will not use CRLF.  */

#include <sys/stat.h>

#include <stdlib.h>

#include <fcntl.h>

#include <stdio.h>

int main ()

{

#ifndef O_BINARY

  exit(1);

#else

  int fd, bytes;

  char buff[5];

  fd = open ("foo", O_WRONLY | O_CREAT | O_TRUNC, S_IRWXU);

  if (fd < 0)

    exit(1);

  if (write (fd, "\n", 1) < 0)

    perror ("write");

  close (fd);

  if ((fd = open ("foo", O_RDONLY | O_BINARY, S_IRWXU)) < 0)

    exit(1);

  bytes = read (fd, buff, 5);

  if (bytes == 2 && buff[0] == '\r' && buff[1] == '\n')

    exit(0);

  else

    exit(1);

#endif

}]])], libgfor_cv_have_crlf=yes, libgfor_cv_have_crlf=no, [

case "${target}" in

  *mingw*) libgfor_cv_have_crlf=yes ;;

  *) libgfor_cv_have_crlf=no;;

esac])])

if test x"$libgfor_cv_have_crlf" = xyes; then

  AC_DEFINE(HAVE_CRLF, 1, [Define if CRLF is line terminator.])

fi])

dnl Check whether the st_ino and st_dev stat fields taken together uniquely

dnl identify the file within the system. This is should be true for POSIX

dnl systems; it is known to be false on mingw32.

AC_DEFUN([LIBGFOR_CHECK_WORKING_STAT], [

  AC_CACHE_CHECK([whether the target stat is reliable],

                  libgfor_cv_have_working_stat, [

  AC_RUN_IFELSE([AC_LANG_SOURCE([[

#include <stdio.h>

#include <sys/types.h>

#include <sys/stat.h>

#include <unistd.h>

int main ()

{

  FILE *f, *g;

  struct stat st1, st2;

  f = fopen ("foo", "w");

  g = fopen ("bar", "w");

  if (stat ("foo", &st1) != 0 || stat ("bar", &st2))

    return 1;

  if (st1.st_dev == st2.st_dev && st1.st_ino == st2.st_ino)

    return 1;

  fclose(f);

  fclose(g);

  return 0;

}]])], libgfor_cv_have_working_stat=yes, libgfor_cv_have_working_stat=no, [

case "${target}" in

  *mingw*) libgfor_cv_have_working_stat=no ;;

  *) libgfor_cv_have_working_stat=yes;;

esac])])

if test x"$libgfor_cv_have_working_stat" = xyes; then

  AC_DEFINE(HAVE_WORKING_STAT, 1, [Define if target has a reliable stat.])

fi])

dnl Checks for fpsetmask function.

AC_DEFUN([LIBGFOR_CHECK_FPSETMASK], [

  AC_CACHE_CHECK([whether fpsetmask is present], libgfor_cv_have_fpsetmask, [

    AC_LINK_IFELSE([AC_LANG_PROGRAM([[

#if HAVE_FLOATINGPOINT_H

# include <floatingpoint.h>

#endif /* HAVE_FLOATINGPOINT_H */

#if HAVE_IEEEFP_H

# include <ieeefp.h>

#endif /* HAVE_IEEEFP_H */]],[[fpsetmask(0);]])],

    eval "libgfor_cv_have_fpsetmask=yes", eval "libgfor_cv_have_fpsetmask=no")

  ])

  if test x"$libgfor_cv_have_fpsetmask" = xyes; then

    have_fpsetmask=yes

    AC_DEFINE(HAVE_FPSETMASK, 1, [Define if you have fpsetmask.])

  fi

])

dnl Check whether we have a mingw that provides a __mingw_snprintf function

AC_DEFUN([LIBGFOR_CHECK_MINGW_SNPRINTF], [

  AC_CACHE_CHECK([whether __mingw_snprintf is present], libgfor_cv_have_mingw_snprintf, [

    AC_LINK_IFELSE([AC_LANG_PROGRAM([[

#include <stdio.h>

extern int __mingw_snprintf (char *, size_t, const char *, ...);

]],[[

__mingw_snprintf (NULL, 0, "%d\n", 1);

]])],

    eval "libgfor_cv_have_mingw_snprintf=yes", eval "libgfor_cv_have_mingw_snprintf=no")

  ])

  if test x"$libgfor_cv_have_mingw_snprintf" = xyes; then

    AC_DEFINE(HAVE_MINGW_SNPRINTF, 1, [Define if you have __mingw_snprintf.])

  fi

])

dnl Check whether we have a broken powf implementation

AC_DEFUN([LIBGFOR_CHECK_FOR_BROKEN_POWF], [

  AC_CACHE_CHECK([whether powf is broken], libgfor_cv_have_broken_powf, [

case "${target}" in

  hppa*64*-*-hpux*) libgfor_cv_have_broken_powf=yes ;;

  *) libgfor_cv_have_broken_powf=no;;

esac])

  if test x"$libgfor_cv_have_broken_powf" = xyes; then

    AC_DEFINE(HAVE_BROKEN_POWF, 1, [Define if powf is broken.])

  fi

])

dnl Check whether we have a __float128 type

AC_DEFUN([LIBGFOR_CHECK_FLOAT128], [

  LIBQUADSPEC=

  if test "x$enable_libquadmath_support" != xno; then

  AC_CACHE_CHECK([whether we have a usable __float128 type],

                 libgfor_cv_have_float128, [

   GCC_TRY_COMPILE_OR_LINK([

    typedef _Complex float __attribute__((mode(TC))) __complex128;

    __float128 foo (__float128 x)

    {

     __complex128 z1, z2;

     z1 = x;

     z2 = x / 7.Q;

     z2 /= z1;

     return (__float128) z2;

    }

    __float128 bar (__float128 x)

    {

      return x * __builtin_huge_valq ();

    }

  ],[

    foo (1.2Q);

    bar (1.2Q);

  ],[

    libgfor_cv_have_float128=yes

  ],[

    libgfor_cv_have_float128=no

])])

  if test "x$libgfor_cv_have_float128" = xyes; then

    AC_DEFINE(HAVE_FLOAT128, 1, [Define if have a usable __float128 type.])

    dnl Check whether -Wl,--as-needed is supported

    dnl

    dnl Turn warnings into error to avoid testsuite breakage.  So enable

    dnl AC_LANG_WERROR, but there's currently (autoconf 2.64) no way to turn

    dnl it off again.  As a workaround, save and restore werror flag like

    dnl AC_PATH_XTRA.

    dnl Cf. http://gcc.gnu.org/ml/gcc-patches/2010-05/msg01889.html

    ac_xsave_[]_AC_LANG_ABBREV[]_werror_flag=$ac_[]_AC_LANG_ABBREV[]_werror_flag

    AC_CACHE_CHECK([whether --as-needed works],

      [libgfor_cv_have_as_needed],

      [

      save_LDFLAGS="$LDFLAGS"

      LDFLAGS="$LDFLAGS -Wl,--as-needed -lm -Wl,--no-as-needed"

      libgfor_cv_have_as_needed=no

      AC_LANG_WERROR

      AC_LINK_IFELSE([AC_LANG_PROGRAM([])],

                     [libgfor_cv_have_as_needed=yes],

                     [libgfor_cv_have_as_needed=no])

      LDFLAGS="$save_LDFLAGS"

      ac_[]_AC_LANG_ABBREV[]_werror_flag=$ac_xsave_[]_AC_LANG_ABBREV[]_werror_flag

    ])

    dnl For static libgfortran linkage, depend on libquadmath only if needed.

    if test "x$libgfor_cv_have_as_needed" = xyes; then

      LIBQUADSPEC="%{static-libgfortran:--as-needed} -lquadmath %{static-libgfortran:--no-as-needed}"

    else

      LIBQUADSPEC="-lquadmath"

    fi

    if test -f ../libquadmath/libquadmath.la; then

      LIBQUADLIB=../libquadmath/libquadmath.la

      LIBQUADLIB_DEP=../libquadmath/libquadmath.la

      LIBQUADINCLUDE='-I$(srcdir)/../libquadmath'

    else

      LIBQUADLIB="-lquadmath"

      LIBQUADLIB_DEP=

      LIBQUADINCLUDE=

    fi

  fi

  else

    # for --disable-quadmath

    LIBQUADLIB=

    LIBQUADLIB_DEP=

    LIBQUADINCLUDE=

  fi

  dnl For the spec file

  AC_SUBST(LIBQUADSPEC)

  AC_SUBST(LIBQUADLIB)

  AC_SUBST(LIBQUADLIB_DEP)

  AC_SUBST(LIBQUADINCLUDE)

  dnl We need a conditional for the Makefile

  AM_CONDITIONAL(LIBGFOR_BUILD_QUAD, [test "x$libgfor_cv_have_float128" = xyes])

])