diff --git a/CMakeLists.txt b/CMakeLists.txt
index a576161..713a52e 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -14,8 +14,8 @@ set(PDF2HTMLEX_VERSION "0.1")
 
 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Wunused-function")
 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++0x")
-#set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -O2")
-set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -ggdb")
+set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -O2")
+#set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -ggdb")
 
 configure_file (src/config.h.in src/config.h)
 
diff --git a/src/HTMLRenderer/install.cc b/src/HTMLRenderer/install.cc
index 7757453..2421bce 100644
--- a/src/HTMLRenderer/install.cc
+++ b/src/HTMLRenderer/install.cc
@@ -191,7 +191,9 @@ void HTMLRenderer::install_embedded_font(GfxFont * font, const string & suffix,
     if(param->single_html)
         add_tmp_file(fn+".ttf");
 
-    system((boost::format("fontforge -script %1% 2>%2%") % script_path % (tmp_dir / NULL_FILENAME)).str().c_str());
+    if(system((boost::format("fontforge -script %1% 2>%2%") % script_path % (tmp_dir / NULL_FILENAME)).str().c_str()) != 0)
+        cerr << "Warning: fontforge failed." << endl;
+
     add_tmp_file("null");
 
     export_remote_font(fn_id, ".ttf", "truetype", font);