Support the auto-compiling for openblas when cross-compiling for Android.

cmake/external/openblas.cmake

@@ -21,12 +21,11 @@ IF(NOT ${CBLAS_FOUND})
     SET(CBLAS_INSTALL_DIR ${THIRD_PARTY_PATH}/install/openblas)
     SET(CBLAS_INC_DIR "${CBLAS_INSTALL_DIR}/include" CACHE PATH "openblas include directory." FORCE)
 
-    IF(WIN32)
-        SET(CBLAS_LIBRARIES "${CBLAS_INSTALL_DIR}/lib/openblas.lib" CACHE FILEPATH "openblas library." FORCE)
-    ELSE(WIN32)
-        SET(CBLAS_LIBRARIES "${CBLAS_INSTALL_DIR}/lib/libopenblas.a" CACHE FILEPATH "openblas library" FORCE)
-    ENDIF(WIN32)
+    SET(CBLAS_LIBRARIES "${CBLAS_INSTALL_DIR}/lib/${LIBRARY_PREFIX}openblas${STATIC_LIBRARY_SUFFIX}"
+        CACHE FILEPATH "openblas library." FORCE)
 
+    # check fortran compiler and library
+    IF(NOT ANDROID)
         IF(CMAKE_COMPILER_IS_GNUCC)
             ENABLE_LANGUAGE(Fortran)
             if (NOT CMAKE_Fortran_COMPILER_VERSION)
@@ -56,20 +55,30 @@ IF(NOT ${CBLAS_FOUND})
 
         ADD_DEFINITIONS(-DPADDLE_USE_LAPACK)
 
+        SET(OPENBLAS_COMMIT "v0.2.19")
+        SET(OPENBLAS_ARGS FC=${CMAKE_Fortran_COMPILER} DYNAMIC_ARCH=1 libs netlib)
+        SET(HOST_C_COMPILER ${CMAKE_C_COMPILER})
+    ELSE()
+        SET(OPENBLAS_COMMIT "b5c96fcfcdc82945502a2303116a64d89985daf5")
+        SET(OPTIONAL_ARGS TARGET=ARMV7 ARM_SOFTFP_ABI=1 NOFORTRAN=1 USE_THREAD=0 libs)
+        SET(HOST_C_COMPILER gcc)
+    ENDIF()
+
     ExternalProject_Add(
         openblas
         ${EXTERNAL_PROJECT_LOG_ARGS}
         GIT_REPOSITORY      https://github.com/xianyi/OpenBLAS.git
-        GIT_TAG             v0.2.19
+        GIT_TAG             ${OPENBLAS_COMMIT}
         PREFIX              ${CBLAS_SOURCES_DIR}
         INSTALL_DIR         ${CBLAS_INSTALL_DIR}
         BUILD_IN_SOURCE     1
-        BUILD_COMMAND       ${CMAKE_MAKE_PROGRAM} FC=${CMAKE_Fortran_COMPILER} CC=${CMAKE_C_COMPILER} HOSTCC=${CMAKE_C_COMPILER} DYNAMIC_ARCH=1 NO_SHARED=1 libs netlib
+        BUILD_COMMAND       ${CMAKE_MAKE_PROGRAM} CC=${CMAKE_C_COMPILER} HOSTCC=${HOST_C_COMPILER} NO_SHARED=1 ${OPTIONAL_ARGS}
         INSTALL_COMMAND     ${CMAKE_MAKE_PROGRAM} install NO_SHARED=1 PREFIX=<INSTALL_DIR>
         UPDATE_COMMAND      ""
         CONFIGURE_COMMAND   ""
     )
 
+    IF(NOT ANDROID)
         ExternalProject_Add_Step(
             openblas lapacke_install
             COMMAND ${CMAKE_COMMAND} -E copy "${CBLAS_SOURCES_DIR}/src/openblas/lapack-netlib/LAPACKE/include/lapacke_mangling_with_flags.h" "${CBLAS_INSTALL_DIR}/include/lapacke_mangling.h"
@@ -78,8 +87,10 @@ IF(NOT ${CBLAS_FOUND})
             COMMAND ${CMAKE_COMMAND} -E copy "${CBLAS_SOURCES_DIR}/src/openblas/lapack-netlib/LAPACKE/include/lapacke_utils.h" "${CBLAS_INSTALL_DIR}/include/lapacke_utils.h"
             DEPENDEES install
     )
+    ENDIF()
 
     LIST(APPEND external_project_dependencies openblas)
 ENDIF(NOT ${CBLAS_FOUND})
 
+MESSAGE(STATUS "BLAS library: ${CBLAS_LIBRARIES}")
 INCLUDE_DIRECTORIES(${CBLAS_INC_DIR})

cmake/system.cmake

@@ -80,12 +80,14 @@ IF(DEFINED CMAKE_SYSTEM_NAME)
     ENDIF()
 ENDIF()
 
-# suffix on different os
+# prefix and suffix on different os
 IF(WIN32)
+    SET(LIBRARY_PREFIX "")
     SET(SHARED_LIBRARY_SUFFIX ".dll")
     SET(STATIC_LIBRARY_SUFFIX ".lib")
     SET(EXECUTABLE_SUFFIX ".exe")
 ELSE(WIN32)
+    SET(LIBRARY_PREFIX "lib")
     IF(APPLE)
         SET(SHARED_LIBRARY_SUFFIX ".dylib")
     ELSE(APPLE)