Merge branch 'stable'

[gnulib.git] / m4 / asinl.m4

diff --git a/m4/asinl.m4 b/m4/asinl.m4
index 1cb272c..cef97a2 100644 (file)
--- a/m4/asinl.m4
+++ b/m4/asinl.m4
@@ -1,5 +1,5 @@
-# asinl.m4 serial 3
-dnl Copyright (C) 2010 Free Software Foundation, Inc.
+# asinl.m4 serial 6
+dnl Copyright (C) 2010-2011 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.
@@ -7,6 +7,8 @@ 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])
 
@@ -51,17 +53,22 @@ AC_DEFUN([gl_FUNC_ASINL],
      || 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>])
+    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])
 ])