-# ldexpl.m4 serial 13
+# ldexpl.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,
AC_DEFUN([gl_FUNC_LDEXPL],
[
AC_REQUIRE([gl_MATH_H_DEFAULTS])
+ AC_REQUIRE([gl_LONG_DOUBLE_VS_DOUBLE])
AC_REQUIRE([gl_FUNC_ISNANL]) dnl for ISNANL_LIBM
dnl Check whether it's declared.
dnl MacOS X 10.3 has ldexpl() in libc but doesn't declare it in <math.h>.
fi
if test $HAVE_DECL_LDEXPL = 0 || test $gl_func_ldexpl = no; then
dnl Find libraries needed to link lib/ldexpl.c.
- LDEXPL_LIBM="$ISNANL_LIBM"
+ if test $HAVE_SAME_LONG_DOUBLE_AS_DOUBLE = 1; then
+ AC_REQUIRE([gl_FUNC_LDEXP])
+ LDEXPL_LIBM="$LDEXP_LIBM"
+ else
+ LDEXPL_LIBM="$ISNANL_LIBM"
+ fi
fi
AC_SUBST([LDEXPL_LIBM])
])