-# asinl.m4 serial 3
-dnl Copyright (C) 2010 Free Software Foundation, Inc.
+# asinl.m4 serial 8
+dnl Copyright (C) 2010-2013 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_ASINL],
[
AC_REQUIRE([gl_MATH_H_DEFAULTS])
+ AC_REQUIRE([gl_LONG_DOUBLE_VS_DOUBLE])
+
dnl Persuade glibc <math.h> to declare asinl().
AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
# define __NO_MATH_INLINES 1 /* for glibc */
#endif
#include <math.h>
+ long double (*funcptr) (long double) = asinl;
long double x;]],
- [[return asinl (x) > 1;]])],
+ [[return funcptr (x) > 1
+ || asinl (x) > 1;]])],
[gl_cv_func_asinl_no_libm=yes],
[gl_cv_func_asinl_no_libm=no])
])
# define __NO_MATH_INLINES 1 /* for glibc */
#endif
#include <math.h>
+ long double (*funcptr) (long double) = asinl;
long double x;]],
- [[return asinl (x) > 1;]])],
+ [[return funcptr (x) > 1
+ || asinl (x) > 1;]])],
[gl_cv_func_asinl_in_libm=yes],
[gl_cv_func_asinl_in_libm=no])
LIBS="$save_LIBS"
if test $gl_cv_func_asinl_no_libm = yes \
|| test $gl_cv_func_asinl_in_libm = yes; then
dnl Also check whether it's declared.
- dnl MacOS X 10.3 has asinl() in libc but doesn't declare it in <math.h>.
- AC_CHECK_DECL([asinl], , [HAVE_DECL_ASINL=0], [#include <math.h>])
+ dnl Mac OS X 10.3 has asinl() in libc but doesn't declare it in <math.h>.
+ AC_CHECK_DECL([asinl], , [HAVE_DECL_ASINL=0], [[#include <math.h>]])
else
HAVE_DECL_ASINL=0
HAVE_ASINL=0
- AC_LIBOBJ([asinl])
- AC_REQUIRE([gl_FUNC_SQRTL])
- dnl Append $SQRTL_LIBM to ASINL_LIBM, avoiding gratuitous duplicates.
- case " $ASINL_LIBM " in
- *" $SQRTL_LIBM "*) ;;
- *) ASINL_LIBM="$ASINL_LIBM $SQRTL_LIBM" ;;
- esac
+ dnl Find libraries needed to link lib/asinl.c.
+ if test $HAVE_SAME_LONG_DOUBLE_AS_DOUBLE = 1; then
+ AC_REQUIRE([gl_FUNC_ASIN])
+ ASINL_LIBM="$ASIN_LIBM"
+ else
+ AC_REQUIRE([gl_FUNC_SQRTL])
+ dnl Append $SQRTL_LIBM to ASINL_LIBM, avoiding gratuitous duplicates.
+ case " $ASINL_LIBM " in
+ *" $SQRTL_LIBM "*) ;;
+ *) ASINL_LIBM="$ASINL_LIBM $SQRTL_LIBM" ;;
+ esac
+ fi
fi
AC_SUBST([ASINL_LIBM])
])