cosl: Simplify for platforms where 'long double' == 'double'.

[gnulib.git] / m4 / cosl.m4

diff --git a/m4/cosl.m4 b/m4/cosl.m4
index 75472ee..946d664 100644 (file)
--- a/m4/cosl.m4
+++ b/m4/cosl.m4
@@ -1,4 +1,4 @@
-# cosl.m4 serial 5
+# cosl.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,
@@ -7,6 +7,8 @@ dnl with or without modifications, as long as this notice is preserved.
 AC_DEFUN([gl_FUNC_COSL],
 [
   AC_REQUIRE([gl_MATH_H_DEFAULTS])
+  AC_REQUIRE([gl_LONG_DOUBLE_VS_DOUBLE])
+
   dnl Persuade glibc <math.h> to declare cosl().
   AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
 
@@ -56,24 +58,29 @@ AC_DEFUN([gl_FUNC_COSL],
     HAVE_DECL_COSL=0
     HAVE_COSL=0
     dnl Find libraries needed to link lib/cosl.c, lib/sincosl.c, lib/trigl.c.
-    AC_REQUIRE([gl_FUNC_ISNANL])
-    AC_REQUIRE([gl_FUNC_FLOOR])
-    AC_REQUIRE([gl_FUNC_FLOORL])
-    dnl Append $ISNANL_LIBM to COSL_LIBM, avoiding gratuitous duplicates.
-    case " $COSL_LIBM " in
-      *" $ISNANL_LIBM "*) ;;
-      *) COSL_LIBM="$COSL_LIBM $ISNANL_LIBM" ;;
-    esac
-    dnl Append $FLOOR_LIBM to COSL_LIBM, avoiding gratuitous duplicates.
-    case " $COSL_LIBM " in
-      *" $FLOOR_LIBM "*) ;;
-      *) COSL_LIBM="$COSL_LIBM $FLOOR_LIBM" ;;
-    esac
-    dnl Append $FLOORL_LIBM to COSL_LIBM, avoiding gratuitous duplicates.
-    case " $COSL_LIBM " in
-      *" $FLOORL_LIBM "*) ;;
-      *) COSL_LIBM="$COSL_LIBM $FLOORL_LIBM" ;;
-    esac
+    if test $HAVE_SAME_LONG_DOUBLE_AS_DOUBLE = 1; then
+      AC_REQUIRE([gl_FUNC_COS])
+      COSL_LIBM="$COS_LIBM"
+    else
+      AC_REQUIRE([gl_FUNC_ISNANL])
+      AC_REQUIRE([gl_FUNC_FLOOR])
+      AC_REQUIRE([gl_FUNC_FLOORL])
+      dnl Append $ISNANL_LIBM to COSL_LIBM, avoiding gratuitous duplicates.
+      case " $COSL_LIBM " in
+        *" $ISNANL_LIBM "*) ;;
+        *) COSL_LIBM="$COSL_LIBM $ISNANL_LIBM" ;;
+      esac
+      dnl Append $FLOOR_LIBM to COSL_LIBM, avoiding gratuitous duplicates.
+      case " $COSL_LIBM " in
+        *" $FLOOR_LIBM "*) ;;
+        *) COSL_LIBM="$COSL_LIBM $FLOOR_LIBM" ;;
+      esac
+      dnl Append $FLOORL_LIBM to COSL_LIBM, avoiding gratuitous duplicates.
+      case " $COSL_LIBM " in
+        *" $FLOORL_LIBM "*) ;;
+        *) COSL_LIBM="$COSL_LIBM $FLOORL_LIBM" ;;
+      esac
+    fi
   fi
   AC_SUBST([COSL_LIBM])
 ])