-# frexpl.m4 serial 8
-dnl Copyright (C) 2007-2008 Free Software Foundation, Inc.
+# frexpl.m4 serial 11
+dnl Copyright (C) 2007-2010 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
dnl with or without modifications, as long as this notice is preserved.
AC_DEFUN([gl_FUNC_FREXPL],
[
AC_REQUIRE([gl_MATH_H_DEFAULTS])
+ dnl Check whether it's declared.
+ dnl MacOS X 10.3 has frexpl() in libc but doesn't declare it in <math.h>.
+ AC_CHECK_DECL([frexpl], , [HAVE_DECL_FREXPL=0], [#include <math.h>])
FREXPL_LIBM=
- AC_CACHE_CHECK([whether frexpl() can be used without linking with libm],
- [gl_cv_func_frexpl_no_libm],
- [
- AC_TRY_LINK([#include <math.h>
- long double x;],
- [int e; return frexpl (x, &e) > 0;],
- [gl_cv_func_frexpl_no_libm=yes],
- [gl_cv_func_frexpl_no_libm=no])
- ])
- if test $gl_cv_func_frexpl_no_libm = no; then
- AC_CACHE_CHECK([whether frexpl() can be used with libm],
- [gl_cv_func_frexpl_in_libm],
- [
- save_LIBS="$LIBS"
- LIBS="$LIBS -lm"
- AC_TRY_LINK([#include <math.h>
- long double x;],
- [int e; return frexpl (x, &e) > 0;],
- [gl_cv_func_frexpl_in_libm=yes],
- [gl_cv_func_frexpl_in_libm=no])
- LIBS="$save_LIBS"
- ])
- if test $gl_cv_func_frexpl_in_libm = yes; then
- FREXPL_LIBM=-lm
+ if test $HAVE_DECL_FREXPL = 1; then
+ gl_CHECK_FREXPL_NO_LIBM
+ if test $gl_cv_func_frexpl_no_libm = no; then
+ AC_CACHE_CHECK([whether frexpl() can be used with libm],
+ [gl_cv_func_frexpl_in_libm],
+ [
+ save_LIBS="$LIBS"
+ LIBS="$LIBS -lm"
+ AC_TRY_LINK([#include <math.h>
+ long double x;],
+ [int e; return frexpl (x, &e) > 0;],
+ [gl_cv_func_frexpl_in_libm=yes],
+ [gl_cv_func_frexpl_in_libm=no])
+ LIBS="$save_LIBS"
+ ])
+ if test $gl_cv_func_frexpl_in_libm = yes; then
+ FREXPL_LIBM=-lm
+ fi
+ fi
+ if test $gl_cv_func_frexpl_no_libm = yes \
+ || test $gl_cv_func_frexpl_in_libm = yes; then
+ save_LIBS="$LIBS"
+ LIBS="$LIBS $FREXPL_LIBM"
+ gl_FUNC_FREXPL_WORKS
+ LIBS="$save_LIBS"
+ case "$gl_cv_func_frexpl_works" in
+ *yes) gl_func_frexpl=yes ;;
+ *) gl_func_frexpl=no; REPLACE_FREXPL=1; FREXPL_LIBM= ;;
+ esac
+ else
+ gl_func_frexpl=no
+ fi
+ if test $gl_func_frexpl = yes; then
+ AC_DEFINE([HAVE_FREXPL], [1],
+ [Define if the frexpl() function is available.])
fi
fi
- if test $gl_cv_func_frexpl_no_libm = yes \
- || test $gl_cv_func_frexpl_in_libm = yes; then
- save_LIBS="$LIBS"
- LIBS="$LIBS $FREXPL_LIBM"
- gl_FUNC_FREXPL_WORKS
- LIBS="$save_LIBS"
- case "$gl_cv_func_frexpl_works" in
- *yes) gl_func_frexpl=yes ;;
- *) gl_func_frexpl=no; REPLACE_FREXPL=1; FREXPL_LIBM= ;;
- esac
- else
- gl_func_frexpl=no
- fi
- if test $gl_func_frexpl = yes; then
- AC_DEFINE([HAVE_FREXPL], 1,
- [Define if the frexpl() function is available.])
- dnl Also check whether it's declared.
- dnl MacOS X 10.3 has frexpl() in libc but doesn't declare it in <math.h>.
- AC_CHECK_DECL([frexpl], , [HAVE_DECL_FREXPL=0], [#include <math.h>])
- else
- HAVE_DECL_FREXPL=0
+ if test $HAVE_DECL_FREXPL = 0 || test $gl_func_frexpl = no; then
AC_LIBOBJ([frexpl])
fi
AC_SUBST([FREXPL_LIBM])
AC_DEFUN([gl_FUNC_FREXPL_NO_LIBM],
[
AC_REQUIRE([gl_MATH_H_DEFAULTS])
+ dnl Check whether it's declared.
+ dnl MacOS X 10.3 has frexpl() in libc but doesn't declare it in <math.h>.
+ AC_CHECK_DECL([frexpl], , [HAVE_DECL_FREXPL=0], [#include <math.h>])
+ if test $HAVE_DECL_FREXPL = 1; then
+ gl_CHECK_FREXPL_NO_LIBM
+ if test $gl_cv_func_frexpl_no_libm = yes; then
+ gl_FUNC_FREXPL_WORKS
+ case "$gl_cv_func_frexpl_works" in
+ *yes) gl_func_frexpl_no_libm=yes ;;
+ *) gl_func_frexpl_no_libm=no; REPLACE_FREXPL=1 ;;
+ esac
+ else
+ gl_func_frexpl_no_libm=no
+ dnl Set REPLACE_FREXPL here because the system may have frexpl in libm.
+ REPLACE_FREXPL=1
+ fi
+ if test $gl_func_frexpl_no_libm = yes; then
+ AC_DEFINE([HAVE_FREXPL_IN_LIBC], [1],
+ [Define if the frexpl() function is available in libc.])
+ fi
+ fi
+ if test $HAVE_DECL_FREXPL = 0 || test $gl_func_frexpl_no_libm = no; then
+ AC_LIBOBJ([frexpl])
+ fi
+])
+
+dnl Test whether frexpl() can be used without linking with libm.
+dnl Set gl_cv_func_frexpl_no_libm to 'yes' or 'no' accordingly.
+AC_DEFUN([gl_CHECK_FREXPL_NO_LIBM],
+[
AC_CACHE_CHECK([whether frexpl() can be used without linking with libm],
[gl_cv_func_frexpl_no_libm],
[
[gl_cv_func_frexpl_no_libm=yes],
[gl_cv_func_frexpl_no_libm=no])
])
- if test $gl_cv_func_frexpl_no_libm = yes; then
- gl_FUNC_FREXPL_WORKS
- case "$gl_cv_func_frexpl_works" in
- *yes) gl_func_frexpl_no_libm=yes ;;
- *) gl_func_frexpl_no_libm=no; REPLACE_FREXPL=1 ;;
- esac
- else
- gl_func_frexpl_no_libm=no
- dnl Set REPLACE_FREXPL here because the system may have frexpl in libm.
- REPLACE_FREXPL=1
- fi
- if test $gl_func_frexpl_no_libm = yes; then
- AC_DEFINE([HAVE_FREXPL_IN_LIBC], 1,
- [Define if the frexpl() function is available in libc.])
- dnl Also check whether it's declared.
- dnl MacOS X 10.3 has frexpl() in libc but doesn't declare it in <math.h>.
- AC_CHECK_DECL([frexpl], , [HAVE_DECL_FREXPL=0], [#include <math.h>])
- else
- HAVE_DECL_FREXPL=0
- AC_LIBOBJ([frexpl])
- fi
])
dnl Test whether frexpl() works on finite numbers (this fails on
}
return 0;
}], [gl_cv_func_frexpl_works=yes], [gl_cv_func_frexpl_works=no],
- [case "$host_os" in
- aix* | beos* | darwin* | irix* | mingw* | pw*)
+ [
+changequote(,)dnl
+ case "$host_os" in
+ aix | aix[3-6]* | beos* | darwin* | irix* | mingw* | pw*)
gl_cv_func_frexpl_works="guessing no";;
*) gl_cv_func_frexpl_works="guessing yes";;
esac
+changequote([,])dnl
])
])
])
projects / gnulib.git / blobdiff