Check if yasm supports a nasm-specific syntax we use (it doesn't in 0.5.0,

 which is still common in Linux distros, and does in 0.6.0). Disable it if we
 don't, attempting to fallback to using nasm. Thanks to Mike Frysinger for the
 patch.

   Fixes Bugzilla #393.

--HG--
branch : SDL-1.2
extra : convert_revision : svn%3Ac70aab31-4412-0410-b14c-859654838e24/branches/SDL-1.2%402328

configure.in

@@ -662,13 +662,20 @@ CheckNASM()
 AC_HELP_STRING([--enable-nasm], [use nasm assembly blitters on x86 [[default=yes]]]),
                   , enable_nasm=yes)
     if test x$enable_video = xyes -a x$enable_assembly = xyes -a x$enable_nasm = xyes; then
-        AC_PATH_PROG(NASM, yasm)
-        if test "x$NASM" = x -o "x$NASM" = x'"$NASM"'; then
-            AC_PATH_PROG(NASM, nasm)
+        CompileNASM()
+        {
+            # Usage: CompileNASM <filename>
+            AC_MSG_CHECKING(to see if $NASM supports $1)
+            if $NASM $NASMFLAGS $1 -o $1.o >&AS_MESSAGE_LOG_FD 2>&1; then
+                CompileNASM_ret="yes"
+            else
+                CompileNASM_ret="no"
             fi
-        if test "x$NASM" != x -a "x$NASM" != x'"$NASM"'; then
-            AC_DEFINE(SDL_HERMES_BLITTERS)
-            SOURCES="$SOURCES $srcdir/src/hermes/*.asm"
+            rm -f $1 $1.o
+            AC_MSG_RESULT($CompileNASM_ret)
+            test "$CompileNASM_ret" = "yes"
+        }
+
         if test x"$NASMFLAGS" = x; then
             case $ARCH in
               win32)
@@ -685,15 +692,26 @@ AC_HELP_STRING([--enable-nasm], [use nasm assembly blitters on x86 [[default=yes
                   ;;
             esac
         fi
+
+        AC_PATH_PROG(NASM, yasm)
+        echo "%ifidn __OUTPUT_FORMAT__,elf" > unquoted-sections
+        echo "section .note.GNU-stack noalloc noexec nowrite progbits" >> unquoted-sections
+        echo "%endif" >> unquoted-sections
+        CompileNASM unquoted-sections || NASM=""
+
+        if test "x$NASM" = x -o "x$NASM" = x'"$NASM"'; then
+            $as_unset ac_cv_path_NASM
+            AC_PATH_PROG(NASM, nasm)
+        fi
+        if test "x$NASM" != x -a "x$NASM" != x'"$NASM"'; then
+            AC_DEFINE(SDL_HERMES_BLITTERS)
+            SOURCES="$SOURCES $srcdir/src/hermes/*.asm"
             NASMFLAGS="$NASMFLAGS -i $srcdir/src/hermes/"
 
             dnl See if hidden visibility is supported
-            echo "GLOBAL _bar:function hidden" > nasm_vis.asm
-            echo "_bar:" >>nasm_vis.asm
-            if $NASM $NASMFLAGS nasm_vis.asm -o nasm_vis.o >&AS_MESSAGE_LOG_FD 2>&1; then
-                NASMFLAGS="$NASMFLAGS -DHIDDEN_VISIBILITY"
-            fi
-            rm -f nasm_vis.asm nasm_vis.o
+            echo "GLOBAL _bar:function hidden" > symbol-visibility
+            echo "_bar:" >> symbol-visibility
+            CompileNASM symbol-visibility && NASMFLAGS="$NASMFLAGS -DHIDDEN_VISIBILITY"
 
             AC_SUBST(NASM)
             AC_SUBST(NASMFLAGS)