fix(cmake/cross-build): misc fix

1: fix cmake cross-ios failed caused by df118a87
   build static lib for APPLE define for XCODE third_party framework including require

2: megbrain_test/megdnn_test build when MGE_INFERENCE_ONLY=ON
   now u can build megbrain_test/megdnn_test by:
   EXTRA_CMAKE_ARGS="-DMGE_WITH_TEST=ON" ./scripts/cmake-build/xxx.sh
   example macos-cross-ios build megdnn_test for IOS by
   EXTRA_CMAKE_ARGS="-DMGE_WITH_TEST=ON" ./scripts/cmake-build/cross_build_ios_arm_inference.sh

3: reuse host flatc build when cross build mode
GitOrigin-RevId: 132f4bf893567bdb1d54de506449950513a5841f

CMakeLists.txt

@@ -40,6 +40,11 @@ option(MGE_USE_SYSTEM_LIB "Build MegEngine with system libraries." OFF)
 option(MGB_WITH_FLATBUFFERS "Build MegBrain with FlatBuffers serialization support." ON)
 option(BUILD_SHARED_LIBS "Build shared libraries" ON)
 
+if (APPLE)
+    set (BUILD_SHARED_LIBS OFF)
+    message("build static for xcode framework require")
+endif()
+
 if (MGE_USE_SYSTEM_LIB)
     set (MGE_CUDA_USE_STATIC OFF)
 endif()
@@ -245,8 +250,6 @@ if(MGE_INFERENCE_ONLY)
     set(MGE_WITH_DISTRIBUTED OFF)
     message("-- Disable python module for inference only build.")
     set(MGE_WITH_PYTHON_MODULE OFF)
-    message("-- Disable tests for inference only build.")
-    set(MGE_WITH_TEST OFF)
 endif()
 
 if(MGE_WITH_DISTRIBUTED)
@@ -469,7 +472,7 @@ endif()
 set(MGB_ENABLE_TENSOR_RT ${MGE_WITH_TRT})
 
 # Inference only
-if(MGE_INFERENCE_ONLY)
+if(MGE_INFERENCE_ONLY AND NOT MGE_WITH_TEST)
     set(MGB_ENABLE_GRAD 0)
     set(MGB_BUILD_SLIM_SERVING 1)
 else()

dnn/test/CMakeLists.txt

@@ -28,6 +28,7 @@ endif()
 
 
 add_executable(megdnn_test ${SOURCES})
+set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-narrowing")
 target_link_libraries(megdnn_test gtest)
 target_link_libraries(megdnn_test megdnn ${MGE_BLAS_LIBS})
 
@@ -36,7 +37,9 @@ target_include_directories(megdnn_test
         ${PROJECT_SOURCE_DIR}/third_party/midout/src
 )
 
-if(UNIX)
+if(APPLE OR ANDROID)
+    set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS}")
+else()
     set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -static-libgcc -static-libstdc++")
 endif()
 
@@ -44,6 +47,8 @@ if(MGE_ENABLE_COVERAGE)
     set(CMAKE_EXE_LINKER_FLAGS  "${CMAKE_EXE_LINKER_FLAGS} --coverage")
 endif()
 
-if(UNIX)
+if(APPLE OR ANDROID)
+    target_link_libraries(megdnn_test dl)
+else()
     target_link_libraries(megdnn_test dl rt)
 endif()

dnn/test/arm_common/conv_bias_multi_thread.cpp

@@ -79,6 +79,7 @@ std::vector<conv_bias::TestArg> get_nchw44_conv_bias_args(
     using NLMode = param::ConvBias::NonlineMode;
 
     std::vector<TestArg> args;
+    MEGDNN_MARK_USED_VAR(no_pad);
 
     auto pack = [&](size_t n, size_t oc, size_t ic, size_t h, size_t w,
                     size_t kernel, size_t stride, size_t group, NLMode nlmode,

dnn/test/arm_common/matrix_mul.cpp

@@ -175,6 +175,7 @@ TEST_F(ARM_COMMON, QINT8x8x32_GEMV_MK4) {
     checker.set_rng(0, rng.get()).set_rng(1, rng.get());
 
     auto run = [&](size_t M, size_t K, size_t N) {
+        MEGDNN_MARK_USED_VAR(N);
         Param param;
         param.format = param::MatrixMul::Format::MK4;
         param.transposeA = false;

scripts/cmake-build/cross_build_android_arm_inference.sh

@@ -138,7 +138,7 @@ function cmake_build() {
     make install/strip
 }
 
-build_flatc $SRC_DIR
+build_flatc $SRC_DIR $REMOVE_OLD_BUILD
 
 api_level=16
 abi="armeabi-v7a with NEON"

scripts/cmake-build/cross_build_ios_arm_inference.sh

@@ -136,7 +136,7 @@ function cmake_build() {
     make install
 }
 
-build_flatc $SRC_DIR
+build_flatc $SRC_DIR $REMOVE_OLD_BUILD
 
 # refs for ../../toolchains/ios.toolchain.cmake
 # to config this, if u want to build other,

scripts/cmake-build/cross_build_linux_arm_inference.sh

@@ -128,7 +128,7 @@ function cmake_build() {
     make install/strip
 }
 
-build_flatc $SRC_DIR
+build_flatc $SRC_DIR $REMOVE_OLD_BUILD
 
 toolchain=null
 if [ "$ARCH" = "arm64-v8a" ]; then

scripts/cmake-build/utils/utils.sh

@@ -12,6 +12,9 @@ fi
 function build_flatc() {
     BUILD_DIR=$1/build_dir/host_flatc/build
     INSTALL_DIR=$BUILD_DIR/../install
+    REMOVE_OLD_BUILD=$2
+
+    if [ $REMOVE_OLD_BUILD = "true" ]; then
         if [ -e $BUILD_DIR ];then
             echo "clean old dir: $BUILD_DIR"
             rm -rf $BUILD_DIR
@@ -20,10 +23,19 @@ function build_flatc() {
             echo "clean old dir: $INSTALL_DIR"
             rm -rf $INSTALL_DIR
         fi
+    else
+        echo "strip remove old build"
+    fi
 
-    echo "create build dir"
+    if [ ! -e $BUILD_DIR ];then
+        echo "create build: $BUILD_DIR"
         mkdir -p $BUILD_DIR
+    fi
+    if [ ! -e $INSTALL_DIR ];then
+        echo "create install $INSTALL_DIR"
         mkdir -p $INSTALL_DIR
+    fi
+
     cd $BUILD_DIR
     cmake -G "$MAKEFILE_TYPE Makefiles" \
         -DCMAKE_BUILD_TYPE=Release \

test/CMakeLists.txt

@@ -28,7 +28,9 @@ if(CXX_SUPPORT_WCLASS_MEMACCESS)
     endif()
 endif()
 
-if(UNIX)
+if(APPLE OR ANDROID)
+    target_link_libraries(megbrain_test dl)
+else()
     target_link_libraries(megbrain_test dl rt)
 endif()