Bug 671426 - Avoid marking binaries as requiring executable stack. r=ted

configure.in

@@ -1724,6 +1724,19 @@ if test "$GNU_CC"; then
     DSO_CFLAGS=''
     DSO_PIC_CFLAGS='-fPIC'
     ASFLAGS="$ASFLAGS -fPIC"
+    AC_MSG_CHECKING([for --noexecstack option to as])
+    _SAVE_CFLAGS=$CFLAGS
+    CFLAGS="$CFLAGS -Wa,--noexecstack"
+    AC_TRY_COMPILE(,,AC_MSG_RESULT([yes])
+                     [ASFLAGS="$ASFLAGS -Wa,--noexecstack"],
+                     AC_MSG_RESULT([no]))
+    CFLAGS=$_SAVE_CFLAGS
+    AC_MSG_CHECKING([for -z noexecstack option to ld])
+    _SAVE_LDFLAGS=$LDFLAGS
+    LDFLAGS="$LDFLAGS -Wl,-z,noexecstack"
+    AC_TRY_LINK(,,AC_MSG_RESULT([yes]),
+                  AC_MSG_RESULT([no])
+                  LDFLAGS=$_SAVE_LDFLAGS)
     _MOZ_RTTI_FLAGS_ON=-frtti
     _MOZ_RTTI_FLAGS_OFF=-fno-rtti