-# frexpl.m4 serial 10
-dnl Copyright (C) 2007-2010 Free Software Foundation, Inc.
+# frexpl.m4 serial 14
+dnl Copyright (C) 2007-2011 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.
[
save_LIBS="$LIBS"
LIBS="$LIBS -lm"
- AC_TRY_LINK([#include <math.h>
- long double x;],
- [int e; return frexpl (x, &e) > 0;],
+ AC_LINK_IFELSE(
+ [AC_LANG_PROGRAM(
+ [[#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"
[Define if the frexpl() function is available.])
fi
fi
- if test $HAVE_DECL_FREXPL = 0 || test $gl_func_frexpl = no; then
- AC_LIBOBJ([frexpl])
- fi
AC_SUBST([FREXPL_LIBM])
])
[Define if the frexpl() function is available in libc.])
fi
fi
- if test $HAVE_DECL_FREXPL = 0 || test $gl_func_frexpl_no_libm = no; then
- AC_LIBOBJ([frexpl])
- fi
])
dnl Test whether frexpl() can be used without linking with libm.
AC_CACHE_CHECK([whether frexpl() can be used without linking with libm],
[gl_cv_func_frexpl_no_libm],
[
- AC_TRY_LINK([#include <math.h>
- long double x;],
- [int e; return frexpl (x, &e) > 0;],
+ AC_LINK_IFELSE(
+ [AC_LANG_PROGRAM(
+ [[#include <math.h>
+ long double x;]],
+ [[int e; return frexpl (x, &e) > 0;]])],
[gl_cv_func_frexpl_no_libm=yes],
[gl_cv_func_frexpl_no_libm=no])
])
AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
AC_CACHE_CHECK([whether frexpl works], [gl_cv_func_frexpl_works],
[
- AC_TRY_RUN([
+ AC_RUN_IFELSE(
+ [AC_LANG_SOURCE([[
#include <float.h>
#include <math.h>
/* Override the values of <float.h>, like done in float.in.h. */
extern long double frexpl (long double, int *);
int main()
{
+ int result = 0;
volatile long double x;
/* Test on finite numbers that fails on AIX 5.1. */
x = 16.0L;
int exp = -9999;
frexpl (x, &exp);
if (exp != 5)
- return 1;
+ result |= 1;
}
/* Test on finite numbers that fails on MacOS X 10.4, because its frexpl
function returns an invalid (incorrectly normalized) value: it returns
int exp = -9999;
long double y = frexpl (x, &exp);
if (!(exp == 1 && y == 0.505L))
- return 1;
+ result |= 2;
}
/* Test on large finite numbers. This fails on BeOS at i = 16322, while
LDBL_MAX_EXP = 16384.
int exp = -9999;
frexpl (x, &exp);
if (exp != i)
- return 1;
+ {
+ result |= 4;
+ break;
+ }
}
}
/* Test on denormalized numbers. */
/* On machines with IEEE854 arithmetic: x = 1.68105e-4932,
exp = -16382, y = 0.5. On MacOS X 10.5: exp = -16384, y = 0.5. */
if (exp != LDBL_MIN_EXP - 1)
- return 1;
+ result |= 8;
}
}
/* Test on infinite numbers. */
int exp;
long double y = frexpl (x, &exp);
if (y != x)
- return 1;
+ result |= 16;
}
- return 0;
-}], [gl_cv_func_frexpl_works=yes], [gl_cv_func_frexpl_works=no],
- [case "$host_os" in
- aix* | beos* | darwin* | irix* | mingw* | pw*)
- gl_cv_func_frexpl_works="guessing no";;
- *) gl_cv_func_frexpl_works="guessing yes";;
- esac
- ])
+ return result;
+}]])],
+ [gl_cv_func_frexpl_works=yes],
+ [gl_cv_func_frexpl_works=no],
+ [
+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
+ ])
])
])