ncnn使用GPU时报error: undefined reference to *******

导读

根据ncnn的官方教程使用vulkan-sdk编译了一个带gpu功能的libncnn.a库，官方教程如下：

https://github.com/Tencent/ncnn/wiki/how-to-build#build-for-windows-x64-using-visual-studio-community-2017

详细错误

../../../../src/main/cppLibs/ncnn/lib/armeabi-v7a/libncnn.a(modelbin.cpp.o):modelbin.cpp:function ncnn::ModelBinFromDataReader::load(int, int) const: error: undefined reference to 'stderr'
../../../../src/main/cppLibs/ncnn/lib/armeabi-v7a/libncnn.a(modelbin.cpp.o):modelbin.cpp:function ncnn::ModelBinFromDataReader::load(int, int) const: error: undefined reference to 'stderr'
../../../../src/main/cppLibs/ncnn/lib/armeabi-v7a/libncnn.a(modelbin.cpp.o):modelbin.cpp:function ncnn::ModelBinFromDataReader::load(int, int) const: error: undefined reference to 'stderr'
../../../../src/main/cppLibs/ncnn/lib/armeabi-v7a/libncnn.a(modelbin.cpp.o):modelbin.cpp:function ncnn::ModelBinFromDataReader::load(int, int) const: error: undefined reference to 'stderr'
../../../../src/main/cppLibs/ncnn/lib/armeabi-v7a/libncnn.a(allocator.cpp.o):allocator.cpp:function ncnn::VkAllocator::flush(ncnn::VkBufferMemory*): error: undefined reference to 'vkFlushMappedMemoryRanges'
../../../../src/main/cppLibs/ncnn/lib/armeabi-v7a/libncnn.a(allocator.cpp.o):allocator.cpp:function ncnn::VkAllocator::invalidate(ncnn::VkBufferMemory*): error: undefined reference to 'vkInvalidateMappedMemoryRanges'
../../../../src/main/cppLibs/ncnn/lib/armeabi-v7a/libncnn.a(allocator.cpp.o):allocator.cpp:function ncnn::VkAllocator::create_buffer(unsigned int, unsigned int): error: undefined reference to 'vkCreateBuffer'
../../../../src/main/cppLibs/ncnn/lib/armeabi-v7a/libncnn.a(allocator.cpp.o):allocator.cpp:function ncnn::VkAllocator::allocate_memory(unsigned int): error: undefined reference to 'vkAllocateMemory'
../../../../src/main/cppLibs/ncnn/lib/armeabi-v7a/libncnn.a(allocator.cpp.o):allocator.cpp:function ncnn::VkAllocator::allocate_dedicated_memory(unsigned int, unsigned long long): error: undefined reference to 'vkAllocateMemory'
../../../../src/main/cppLibs/ncnn/lib/armeabi-v7a/libncnn.a(allocator.cpp.o):allocator.cpp:function ncnn::VkBlobBufferAllocator::clear(): error: undefined reference to 'vkDestroyBuffer'
../../../../src/main/cppLibs/ncnn/lib/armeabi-v7a/libncnn.a(allocator.cpp.o):allocator.cpp:function ncnn::VkBlobBufferAllocator::clear(): error: undefined reference to 'vkFreeMemory'
../../../../src/main/cppLibs/ncnn/lib/armeabi-v7a/libncnn.a(allocator.cpp.o):allocator.cpp:function ncnn::VkBlobBufferAllocator::clear(): error: undefined reference to 'vkUnmapMemory'
../../../../src/main/cppLibs/ncnn/lib/armeabi-v7a/libncnn.a(allocator.cpp.o):allocator.cpp:function ncnn::VkBlobBufferAllocator::fastMalloc(unsigned int): error: undefined reference to 'vkCreateBuffer'

解决办法

我在编译Android工程的时候，采用的是build.gradle和CMakeLists.txt文件来进行配置的，如果你是使用的Android.mk和application.mk文件可能配置上会有些区别

build.gradle文件中添加以下内容

想要使用GPU功能，Android的版本必须在24(Android7.0)以上

android {defaultConfig {minSdkVersion 24//应用支持Android的最低版本externalNativeBuild {cmake {arguments "-DANDROID_PLATFORM=android-24"//设置编译so文件的时候Android的版本}}}
}

CMakeLists.txt文件中添加如下内容

target_link_libraries( # Specifies the target library.jnigraphicsvulkan)

Android.mk文件添加如下内容

LOCAL_LDLIBS := -lz -llog -ljnigraphics -lvulkan -landroid

application.mk中添加

APP_PLATFORM := android-24

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ncnn使用GPU时报error: undefined reference to *******

导读

详细错误

解决办法

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