diff --git a/.circleci/config.yml b/.circleci/config.yml
index d62fc838d..1bd67557b 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -1,6 +1,6 @@
 version: 2
 jobs:
-  build:
+  build-centos7:
     docker:
       - image: ossrs/srs:dev
     steps:
@@ -9,6 +9,15 @@ jobs:
           cd trunk &&
           ./configure --gb28181=off --utest=off --srtp-nasm=off && make &&
           ./configure --gb28181=on --utest=on --srtp-nasm=on && make clean && make
+  build-ubuntu20:
+    docker:
+      - image: ossrs/srs:ubuntu20
+    steps:
+      - checkout
+      - run: |
+          cd trunk &&
+          ./configure --gb28181=off --utest=off --srtp-nasm=off && make &&
+          ./configure --gb28181=on --utest=on --srtp-nasm=on && make clean && make
   test:
     docker:
       - image: ossrs/srs:dev
@@ -22,5 +31,6 @@ workflows:
   version: 2
   build_and_test:
     jobs:
-      - build
+      - build-centos7
+      - build-ubuntu20
       - test
diff --git a/trunk/auto/setup_variables.sh b/trunk/auto/setup_variables.sh
index cf26ea0c3..1a1bcb4d1 100755
--- a/trunk/auto/setup_variables.sh
+++ b/trunk/auto/setup_variables.sh
@@ -13,6 +13,7 @@ if [[ $OS_KERNEL_NAME == Darwin ]]; then
   SRS_PLATFORM="${SRS_PLATFORM}-${GCC_VERSION}"
 else
   GCC_VERSION="GCC$(gcc --version 2>/dev/null|grep gcc|awk '{print $3}')"
+  echo $GCC_VERSION| grep '-' >/dev/null && GCC_VERSION=$(echo $GCC_VERSION| awk -F '-' '{print$1}')
   SRS_PLATFORM="${SRS_PLATFORM}-${GCC_VERSION}"
 fi
 # Use isolate cache for different SRS version.
diff --git a/trunk/src/core/srs_core_version4.hpp b/trunk/src/core/srs_core_version4.hpp
index 05bc29894..11c87cb3a 100644
--- a/trunk/src/core/srs_core_version4.hpp
+++ b/trunk/src/core/srs_core_version4.hpp
@@ -24,6 +24,6 @@
 #ifndef SRS_CORE_VERSION4_HPP
 #define SRS_CORE_VERSION4_HPP
 
-#define SRS_VERSION4_REVISION 76
+#define SRS_VERSION4_REVISION 77
 
 #endif