make brpc sources compiled once

CMakeLists.txt

@@ -56,7 +56,7 @@ include_directories(
 set(CMAKE_CXX_STANDARD 11)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
 set(CMAKE_CPP_FLAGS "-DBRPC_WITH_GLOG=${WITH_GLOG_VAL} -DGFLAGS_NS=${GFLAGS_NS}")
-set(CMAKE_CPP_FLAGS "${CMAKE_CPP_FLAGS} -DBTHREAD_USE_FAST_PTHREAD_MUTEX -D__const__= -D_GNU_SOURCE -DUSE_SYMBOLIZE -DNO_TCMALLOC -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -D__STDC_CONSTANT_MACROS")
+set(CMAKE_CPP_FLAGS "${CMAKE_CPP_FLAGS} -DBTHREAD_USE_FAST_PTHREAD_MUTEX -D__const__= -D_GNU_SOURCE -DUSE_SYMBOLIZE -DNO_TCMALLOC -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -D__STDC_CONSTANT_MACROS -D__STRICT_ANSI__")
 set(CMAKE_CPP_FLAGS "${CMAKE_CPP_FLAGS} ${DEBUG_SYMBOL}")
 set(CMAKE_CXX_FLAGS "${CMAKE_CPP_FLAGS} -O2 -pipe -Wall -W -fPIC -fstrict-aliasing -Wno-invalid-offsetof -Wno-unused-parameter -fno-omit-frame-pointer")
 set(CMAKE_C_FLAGS "${CMAKE_CPP_FLAGS} -O2 -pipe -Wall -W -fPIC -fstrict-aliasing -Wno-unused-parameter -fno-omit-frame-pointer")

src/CMakeLists.txt

@@ -184,8 +184,13 @@ set(SOURCES
     ${PROTO_SRCS}
     )
 
-add_library(brpc SHARED ${SOURCES})
-add_library(brpc_static STATIC ${SOURCES})
+add_library(OBJ_LIB OBJECT ${SOURCES})
+
+# shared libraries need PIC
+set_property(TARGET ${OBJ_LIB} PROPERTY POSITION_INDEPENDENT_CODE 1)
+
+add_library(brpc SHARED $<TARGET_OBJECTS:OBJ_LIB>)
+add_library(brpc_static STATIC $<TARGET_OBJECTS:OBJ_LIB>)
 
 target_link_libraries(brpc 
     ${GFLAGS_LIBRARY}

test/CMakeLists.txt

@@ -267,19 +267,20 @@ target_link_libraries(test_bvar
     z
     )
 
-add_executable(test_butil ${TEST_BUTIL_SOURCES} ${PROTO_SRCS})
+add_library(PROTO_OBJ OBJECT ${PROTO_SRCS})
+add_executable(test_butil ${TEST_BUTIL_SOURCES} $<TARGET_OBJECTS:PROTO_OBJ>)
 target_link_libraries(test_butil brpc ${GTEST_LIB})
 
 file(GLOB BTHREAD_UNITTESTS "bthread*unittest.cpp")
 foreach(BTHREAD_UT ${BTHREAD_UNITTESTS})
     get_filename_component(BTHREAD_UT_WE ${BTHREAD_UT} NAME_WE)
-    add_executable(${BTHREAD_UT_WE} ${BTHREAD_UT} ${PROTO_SRCS})
+    add_executable(${BTHREAD_UT_WE} ${BTHREAD_UT} $<TARGET_OBJECTS:PROTO_OBJ>)
     target_link_libraries(${BTHREAD_UT_WE} brpc ${GTEST_MAIN_LIB} ${GPERFTOOLS_LIBRARIES} ${GTEST_LIB})
 endforeach()
 
 file(GLOB BRPC_UNITTESTS "brpc_*_unittest.cpp")
 foreach(BRPC_UT ${BRPC_UNITTESTS})
     get_filename_component(BRPC_UT_WE ${BRPC_UT} NAME_WE)
-    add_executable(${BRPC_UT_WE} ${BRPC_UT} ${PROTO_SRCS})
+    add_executable(${BRPC_UT_WE} ${BRPC_UT} $<TARGET_OBJECTS:PROTO_OBJ>)
     target_link_libraries(${BRPC_UT_WE} brpc ${GTEST_MAIN_LIB} ${GPERFTOOLS_LIBRARIES} ${GTEST_LIB})
 endforeach()