Fix warpctc bugs

Author: gangliao

cmake/external/warpctc.cmake

@@ -24,10 +24,16 @@ SET(WARPCTC_LIB_DIR "${WARPCTC_INSTALL_DIR}/lib" CACHE PATH "Warp-ctc Library Di
 
 IF(WIN32)
     SET(WARPCTC_LIBRARIES
-        "${WARPCTC_INSTALL_DIR}/lib/warpctc.lib" CACHE FILEPATH "Warp-ctc Library" FORCE)
+        "${WARPCTC_INSTALL_DIR}/lib/warpctc.dll" CACHE FILEPATH "Warp-ctc Library" FORCE)
 ELSE(WIN32)
+    IF(APPLE)
+        SET(_warpctc_SHARED_SUFFIX dylib)
+    ELSE(APPLE)
+        SET(_warpctc_SHARED_SUFFIX so)
+    ENDIF(APPLE)
+
     SET(WARPCTC_LIBRARIES
-        "${WARPCTC_INSTALL_DIR}/lib/libwarpctc.a" CACHE FILEPATH "Warp-ctc Library" FORCE)
+        "${WARPCTC_INSTALL_DIR}/lib/libwarpctc.${_warpctc_SHARED_SUFFIX}" CACHE FILEPATH "Warp-ctc Library" FORCE)
 ENDIF(WIN32)
 
 IF(CMAKE_CXX_COMPILER_ID STREQUAL "Clang" OR CMAKE_CXX_COMPILER_ID STREQUAL "AppleClang" )
@@ -48,7 +54,7 @@ ExternalProject_Add(
     CMAKE_ARGS      -DWITH_GPU=${WITH_GPU}
     CMAKE_ARGS      -DWITH_OMP=${USE_OMP}
     CMAKE_ARGS      -DWITH_TORCH=OFF
-    CMAKE_ARGS      -DBUILD_SHARED=OFF
+    CMAKE_ARGS      -DBUILD_SHARED=ON
 )
 
 LIST(APPEND external_project_dependencies warpctc)

paddle/gserver/tests/CMakeLists.txt

@@ -80,7 +80,7 @@ if(NOT WITH_DOUBLE)
         test_WarpCTCLayer.cpp)
 
     add_test(NAME test_WarpCTCLayer
-        COMMAND ${CMAKE_CURRENT_BINARY_DIR}/test_WarpCTCLayer
+        COMMAND ${CMAKE_CURRENT_BINARY_DIR}/test_WarpCTCLayer --warpctc_dir=${WARPCTC_LIB_DIR}
         WORKING_DIRECTORY ${PROJ_ROOT}/paddle)
 endif()