X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=m4%2Fsinl.m4;h=60e0f76d7d07a1b0257808d635c1d46c217ac51f;hb=0874a5828bbb4784e9c9d54243b3c978e8e54ece;hp=510c9b7e8a3e183de3756320bf2cb567697319f5;hpb=d959bf1ca51cddcd5810a1be44e3391c8965dd59;p=gnulib.git

diff --git a/m4/sinl.m4 b/m4/sinl.m4
index 510c9b7e8..60e0f76d7 100644
--- a/m4/sinl.m4
+++ b/m4/sinl.m4
@@ -1,5 +1,5 @@
-# sinl.m4 serial 5
-dnl Copyright (C) 2010-2011 Free Software Foundation, Inc.
+# sinl.m4 serial 7
+dnl Copyright (C) 2010-2012 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_SINL],
 [
   AC_REQUIRE([gl_MATH_H_DEFAULTS])
+  AC_REQUIRE([gl_LONG_DOUBLE_VS_DOUBLE])
+
   dnl Persuade glibc <math.h> to declare sinl().
   AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
 
@@ -20,8 +22,10 @@ AC_DEFUN([gl_FUNC_SINL],
              # define __NO_MATH_INLINES 1 /* for glibc */
              #endif
              #include <math.h>
+             long double (*funcptr) (long double) = sinl;
              long double x;]],
-           [[return sinl (x) > 0.4;]])],
+           [[return funcptr (x) > 0.4
+                    || sinl (x) > 0.4;]])],
         [gl_cv_func_sinl_no_libm=yes],
         [gl_cv_func_sinl_no_libm=no])
     ])
@@ -37,8 +41,10 @@ AC_DEFUN([gl_FUNC_SINL],
                # define __NO_MATH_INLINES 1 /* for glibc */
                #endif
                #include <math.h>
+               long double (*funcptr) (long double) = sinl;
                long double x;]],
-             [[return sinl (x) > 0.4;]])],
+             [[return funcptr (x) > 0.4
+                      || sinl (x) > 0.4;]])],
           [gl_cv_func_sinl_in_libm=yes],
           [gl_cv_func_sinl_in_libm=no])
         LIBS="$save_LIBS"
@@ -56,24 +62,29 @@ AC_DEFUN([gl_FUNC_SINL],
     HAVE_DECL_SINL=0
     HAVE_SINL=0
     dnl Find libraries needed to link lib/sinl.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 SINL_LIBM, avoiding gratuitous duplicates.
-    case " $SINL_LIBM " in
-      *" $ISNANL_LIBM "*) ;;
-      *) SINL_LIBM="$SINL_LIBM $ISNANL_LIBM" ;;
-    esac
-    dnl Append $FLOOR_LIBM to SINL_LIBM, avoiding gratuitous duplicates.
-    case " $SINL_LIBM " in
-      *" $FLOOR_LIBM "*) ;;
-      *) SINL_LIBM="$SINL_LIBM $FLOOR_LIBM" ;;
-    esac
-    dnl Append $FLOORL_LIBM to SINL_LIBM, avoiding gratuitous duplicates.
-    case " $SINL_LIBM " in
-      *" $FLOORL_LIBM "*) ;;
-      *) SINL_LIBM="$SINL_LIBM $FLOORL_LIBM" ;;
-    esac
+    if test $HAVE_SAME_LONG_DOUBLE_AS_DOUBLE = 1; then
+      AC_REQUIRE([gl_FUNC_SIN])
+      SINL_LIBM="$SIN_LIBM"
+    else
+      AC_REQUIRE([gl_FUNC_ISNANL])
+      AC_REQUIRE([gl_FUNC_FLOOR])
+      AC_REQUIRE([gl_FUNC_FLOORL])
+      dnl Append $ISNANL_LIBM to SINL_LIBM, avoiding gratuitous duplicates.
+      case " $SINL_LIBM " in
+        *" $ISNANL_LIBM "*) ;;
+        *) SINL_LIBM="$SINL_LIBM $ISNANL_LIBM" ;;
+      esac
+      dnl Append $FLOOR_LIBM to SINL_LIBM, avoiding gratuitous duplicates.
+      case " $SINL_LIBM " in
+        *" $FLOOR_LIBM "*) ;;
+        *) SINL_LIBM="$SINL_LIBM $FLOOR_LIBM" ;;
+      esac
+      dnl Append $FLOORL_LIBM to SINL_LIBM, avoiding gratuitous duplicates.
+      case " $SINL_LIBM " in
+        *" $FLOORL_LIBM "*) ;;
+        *) SINL_LIBM="$SINL_LIBM $FLOORL_LIBM" ;;
+      esac
+    fi
   fi
   AC_SUBST([SINL_LIBM])
 ])