# HG changeset patch
# User Ryan C. Gordon <icculus@icculus.org>
# Date 1180955208 0
# Node ID 9d9e15ab169796f070ff69e855b5773f2976ab8b
# Parent  70dac8976f9402c595f8fb4bfe2b178eea4135fd
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.

diff -r 70dac8976f94 -r 9d9e15ab1697 configure.in
--- a/configure.in	Sun Jun 03 19:21:07 2007 +0000
+++ b/configure.in	Mon Jun 04 11:06:48 2007 +0000
@@ -662,38 +662,56 @@
 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
+        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
+            rm -f $1 $1.o
+            AC_MSG_RESULT($CompileNASM_ret)
+            test "$CompileNASM_ret" = "yes"
+        }
+
+        if test x"$NASMFLAGS" = x; then
+            case $ARCH in
+              win32)
+                  NASMFLAGS="-f win32"
+                  ;;
+              openbsd)
+                  NASMFLAGS="-f aoutb"
+                  ;;
+              macosx)
+                  NASMFLAGS="-f macho"
+                  ;;
+              *)
+                  NASMFLAGS="-f elf"
+                  ;;
+            esac
+        fi
+
         AC_PATH_PROG(NASM, yasm)
+        echo "%ifidn __OUTPUT_FORMAT__,elf" > unquoted-sections
+        echo "section .note.GNU-stack noalloc noexec nowrite progbits" >> unquoted-sections
+        echo "%endif" >> unquoted-sections
+        CompileNASM unquoted-sections || NASM=""
+
         if test "x$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 $srcdir/src/hermes/*.asm"
-            if test x"$NASMFLAGS" = x; then
-                case $ARCH in
-                  win32)
-                      NASMFLAGS="-f win32"
-                      ;;
-                  openbsd)
-                      NASMFLAGS="-f aoutb"
-                      ;;
-                  macosx)
-                      NASMFLAGS="-f macho"
-                      ;;
-                  *)
-                      NASMFLAGS="-f elf"
-                      ;;
-                esac
-            fi
             NASMFLAGS="$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)