Work around mysterious Mac build error.

This is a workaround for google#41. I don't understand why it should help. The
only downside is that it increased on-disk binary size (but not
in-memory size).

Author: robryk

guetzli.make

@@ -19,12 +19,12 @@ ifeq ($(config),release)
   INCLUDES += -I. -Ithird_party/butteraugli
   FORCE_INCLUDE +=
   ALL_CPPFLAGS += $(CPPFLAGS) -MMD -MP $(DEFINES) $(INCLUDES)
-  ALL_CFLAGS += $(CFLAGS) $(ALL_CPPFLAGS) -O3
+  ALL_CFLAGS += $(CFLAGS) $(ALL_CPPFLAGS) -O3 -g
   ALL_CXXFLAGS += $(CXXFLAGS) $(ALL_CFLAGS) -std=c++11
   ALL_RESFLAGS += $(RESFLAGS) $(DEFINES) $(INCLUDES)
   LIBS += -lpng -lgflags_nothreads -lz -lpthread
   LDDEPS +=
-  ALL_LDFLAGS += $(LDFLAGS) -s
+  ALL_LDFLAGS += $(LDFLAGS)
   LINKCMD = $(CXX) -o "$@" $(OBJECTS) $(RESOURCES) $(ALL_LDFLAGS) $(LIBS)
   define PREBUILDCMDS
   endef

premake5.lua

@@ -5,6 +5,10 @@ workspace "guetzli"
 
   flags { "C++11" }
 
+  -- workaround for #41
+  filter "action:gmake"
+    symbols "On"
+
   filter "configurations:Debug"
     symbols "On"
   filter "configurations:Release"