Add -Wno-empty-body compiler flag to Phar extension.

Author: Girgias

ext/phar/config.m4

@@ -5,7 +5,17 @@ PHP_ARG_ENABLE([phar],
   [yes])
 
 if test "$PHP_PHAR" != "no"; then
-  PHP_NEW_EXTENSION(phar, util.c tar.c zip.c stream.c func_interceptors.c dirstream.c phar.c phar_object.c phar_path_check.c, $ext_shared,, -DZEND_ENABLE_STATIC_TSRMLS_CACHE=1)
+  dnl Add -Wno-empty-body because the code generated by rec2 produces this warning
+  PHAR_COMPILER_FLAGS="$PHAR_CFLAGS -Wno-empty-body -DZEND_ENABLE_STATIC_TSRMLS_CACHE=1"
+  PHP_NEW_EXTENSION(phar, util.c \
+    tar.c \
+    zip.c \
+    stream.c \
+    func_interceptors.c \
+    dirstream.c \
+    phar.c \
+    phar_object.c \
+    phar_path_check.c, $ext_shared,, $PHAR_COMPILER_FLAGS)
   AC_MSG_CHECKING([for phar openssl support])
   if test "$PHP_OPENSSL_SHARED" = "yes"; then
     AC_MSG_RESULT([no (shared openssl)])