Detect if gcc is able to compile x86 asm and if it supports passing more

than 10 parameters in inline asm, else disable asm code.
This should enable it to work on any x86 platform (not just linux as before)
given that a recent enough gcc is available (no more need to guess by looking
at $host)

This should also fix the issues of compiling wrlib with gcc-2.95

configure.ac

@@ -205,23 +205,19 @@ dnl -----------------------
 asm_support=no
 mmx_support=no
 if test "$ac_cv_prog_gcc" = yes; then
-   
-    # gcc-3.4 complains about some of our stuff without this
+
+    # gcc-3.3 or newer complains about some of our stuff without this
     NOSTRICTALIASING="-fno-strict-aliasing"
 
-    x86=0
-    changequote(,)dnl
-    case "$host_cpu" in
-       i[3456]86) x86=1
-       ;;
-    esac
-    changequote([,])dnl
+    AC_CACHE_CHECK(whether gcc supports x86 inline asm,
+                   ac_cv_c_inline_asm,
+                   [AC_TRY_LINK(,[{int x; asm volatile("movl %%eax, %%ebx\n"::
+                          "m" (x),"m" (x),"m" (x),"m" (x),"m" (x),"m" (x),
+                          "m" (x),"m" (x),"m" (x),"m" (x),"m" (x),"m" (x));}],
+                   ac_cv_c_inline_asm=yes,
+                   ac_cv_c_inline_asm=no)])
 
-    if test "$host_os" != "linux" -a "$host_os" != "linux-gnu" ; then
-       x86=0
-    fi
-
-    if test $x86 = 1; then
+    if test "x$ac_cv_c_inline_asm" = xyes; then
        AC_DEFINE(ASM_X86, 1, [define if processor is x86 (normally detected by configure)])
        asm_support=yes