diff --git a/Makefile-gdb.patch b/Makefile-gdb.patch
new file mode 100644
index 0000000..bb5b977
--- /dev/null
+++ b/Makefile-gdb.patch
@@ -0,0 +1,13 @@
+Index: brise-0.35+git20140810/Makefile
+===================================================================
+--- brise-0.35+git20140810.orig/Makefile
++++ brise-0.35+git20140810/Makefile
+@@ -18,7 +18,7 @@ all:
+ 	@cp symbols.yaml ${DATA}
+ 	@cp preset/*.yaml  ${DATA}
+ 	@cp supplement/*.yaml  ${DATA}
+-	rime_deployer --build  ${DATA}
++	gdb --eval-command='set height 0' --eval-command='run' --eval-command='bt' --eval-command='quit' --args rime_deployer --build  ${DATA}
+ 
+ # deprecated
+ essay.kct:
diff --git a/brise.changes b/brise.changes
index 96ee86e..a2f53c7 100644
--- a/brise.changes
+++ b/brise.changes
@@ -1,8 +1,3 @@
--------------------------------------------------------------------
-Tue Aug 11 02:30:14 UTC 2015 - i@marguerite.su
-
-- non-parallel build
-
 -------------------------------------------------------------------
 Sun Aug 10 09:14:36 UTC 2014 - i@marguerite.su
 
diff --git a/brise.spec b/brise.spec
index 984c5fb..6bd315f 100644
--- a/brise.spec
+++ b/brise.spec
@@ -24,8 +24,23 @@ License:        GPL-3.0+
 Group:          System/I18n/Chinese
 Url:            https://github.com/lotem/brise
 Source:         brise-%{version}.tar.gz
+Patch:	Makefile-gdb.patch
 BuildRequires:  kyotocabinet
 BuildRequires:  librime-devel
+# debug on OBS
+BuildRequires:	gdb
+#BuildRequires:	glibc-debuginfo
+#BuildRequires:	rime-debuginfo librime0-debuginfo 	
+#BuildRequires:	libboost_system1_53_0-debuginfo
+#BuildRequires:	libglog0-debuginfo
+#BuildRequires:	libstdc++6-debuginfo libgcc_s1-debuginfo
+#BuildRequires:	libboost_filesystem1_53_0-debuginfo
+#BuildRequires:	libboost_regex1_53_0-debuginfo
+#BuildRequires:	libboost_signals1_53_0-debuginfo
+#BuildRequires:	libboost_thread1_53_0-debuginfo
+#BuildRequires:	libyaml-cpp0_5-debuginfo
+#BuildRequires:	libkyotocabinet16-debuginfo
+#BuildRequires:	libicu51_2-debuginfo libz1-debuginfo
 BuildRoot:      %{_tmppath}/%{name}-%{version}-build
 
 %description
@@ -37,6 +52,7 @@ Brise is the input schemas collection of Rime.
 
 %prep
 %setup -q
+%patch -p1
 
 %build
 make -j1