--- fox-1.7.57/configure.ac.orig	2016-07-08 20:07:27.000000000 +0200
+++ fox-1.7.57/configure.ac	2017-02-05 22:23:07.410090151 +0100
@@ -56,9 +56,6 @@
 AC_SUBST(LT_REVISION)
 AC_SUBST(LT_AGE)
 
-# Prevents setting flags.
-CXXFLAGS=""
-
 # More secret source
 AC_GNU_SOURCE
 
@@ -125,7 +122,7 @@
 AC_ARG_ENABLE(debug,[  --enable-debug          compile for debugging])
 AC_MSG_RESULT([$enable_debug])
 if test "x$enable_debug" = "xyes" ; then
-  CXXFLAGS="${CXXFLAGS} -g -DDEBUG"
+  CXXFLAGS="${CXXFLAGS} -DDEBUG"
 fi
 
 # Building for release
@@ -133,10 +130,9 @@
 AC_ARG_ENABLE(release,[  --enable-release        compile for release])
 AC_MSG_RESULT([$enable_release])
 if test "x$enable_release" = "xyes" ; then
-  CXXFLAGS="${CXXFLAGS} -O2 -DNDEBUG"
+  CXXFLAGS="${CXXFLAGS} -DNDEBUG"
   if test "${GXX}" = "yes" ; then
     CXXFLAGS="${CXXFLAGS} -ffast-math -fstrict-aliasing -finline-functions -fomit-frame-pointer"
-    LDFLAGS="-s ${LDFLAGS}"
   fi
 fi