revert external gflags, test=develop (#30623)

cmake/external/gflags.cmake

@@ -30,8 +30,6 @@ ENDIF(WIN32)
 
 INCLUDE_DIRECTORIES(${GFLAGS_INCLUDE_DIR})
 
-set(GFLAGS_NAMESPACE "paddle_gflags")
-
 cache_third_party(extern_gflags
     REPOSITORY   ${GFLAGS_REPOSITORY}
     TAG          ${GFLAGS_TAG}
@@ -59,7 +57,6 @@ ExternalProject_Add(
                     -DCMAKE_POSITION_INDEPENDENT_CODE=ON
                     -DBUILD_TESTING=OFF
                     -DCMAKE_BUILD_TYPE=${THIRD_PARTY_BUILD_TYPE}
-                    -DGFLAGS_NAMESPACE=${GFLAGS_NAMESPACE} 
                     ${EXTERNAL_OPTIONAL_ARGS}
     CMAKE_CACHE_ARGS -DCMAKE_INSTALL_PREFIX:PATH=${GFLAGS_INSTALL_DIR}
                      -DCMAKE_POSITION_INDEPENDENT_CODE:BOOL=ON

paddle/fluid/inference/check_symbol.sh

@@ -18,7 +18,7 @@ lib=$1
 if [ $# -ne 1 ]; then echo "No input library"; exit -1 ; fi
 
 num_paddle_syms=$(nm -D "${lib}" | grep -c paddle )
-num_google_syms=$(nm -D "${lib}" | grep google | grep -v paddle | grep -v brpc | grep -v fL | grep -c "T " )
+num_google_syms=$(nm -D "${lib}" | grep google | grep -v paddle | grep -v brpc | grep -c "T " )
 
 if [ $num_paddle_syms -le 0 ]; then echo "Have no paddle symbols"; exit -1 ; fi
 if [ $num_google_syms -ge 1 ]; then echo "Have some google symbols"; exit -1 ; fi

paddle/fluid/inference/paddle_fluid.map

@@ -3,7 +3,6 @@
 		*paddle*;
 		*Pass*;
 		*profile*;
-		*fL*;
 	local:
 		*;
 };