debug libnpu_driver_compiler is not copied to "build/lib" and build error reported

[zxue2]

Steps as below. Please have a check.

(1) Pull npu driver according to [linux-npu-driver/docs/overview.md at main · intel/linux-npu-driver](https://github.com/intel/linux-npu-driver/blob/main/docs/overview.md)

(2）Change npu_compiler_build.cmake.

diff --git a/compiler/npu_compiler_build.cmake b/compiler/npu_compiler_build.cmake
index d61018f..9941dd0 100644
--- a/compiler/npu_compiler_build.cmake
+++ b/compiler/npu_compiler_build.cmake
@@ -27,7 +27,9 @@ list(APPEND NPU_COMPILER_CMAKE_FLAGS -DCMAKE_TOOLCHAIN_FILE:FILEPATH=${CMAKE_TOO
list(APPEND NPU_COMPILER_CMAKE_FLAGS -DCMAKE_MAKE_PROGRAM:FILEPATH=${CMAKE_MAKE_PROGRAM})
list(APPEND NPU_COMPILER_CMAKE_FLAGS -DBUILD_COMPILER_FOR_DRIVER=ON)
list(APPEND NPU_COMPILER_CMAKE_FLAGS -DBUILD_SHARED_LIBS=OFF)
-list(APPEND NPU_COMPILER_CMAKE_FLAGS -DCMAKE_BUILD_TYPE=Release)
+list(APPEND NPU_COMPILER_CMAKE_FLAGS -DCMAKE_BUILD_TYPE=Debug)
+#list(APPEND NPU_COMPILER_CMAKE_FLAGS -DCMAKE_CXX_FLAGS_DEBUG="-O1")
+list(APPEND NPU_COMPILER_CMAKE_FLAGS -DCMAKE_CXX_FLAGS_DEBUG="-g")
list(APPEND NPU_COMPILER_CMAKE_FLAGS -DENABLE_CLANG_FORMAT=OFF)
list(APPEND NPU_COMPILER_CMAKE_FLAGS -DENABLE_GAPI_PREPROCESSING=OFF)
list(APPEND NPU_COMPILER_CMAKE_FLAGS -DENABLE_HETERO=OFF)

(3) Compile npu driver with compiler as below

cmake -B build -S .  -DENABLE_NPU_COMPILER_BUILD=ON -DCMAKE_BUILD_TYPE=Debug -DCMAKE_CXX_FLAGS_DEBUG="-g -O0"

cmake --build build --parallel  $(nproc)   

(4) Error compilation log snippet

[100%] Linking CXX shared library ../../../../../../bin/intel64/Debug/libnpu_driver_compiler.so
[100%] Built target npu_driver_compiler
[ 65%] Performing install step for 'npu_compiler_build'
cp: cannot stat '/root/npu/linux-npu-driver/build/third_party/npu_plugin/build-cid/bin/intel64/Release/libnpu_driver_compiler.so': No sule or directory
gmake[2]: *** [compiler/CMakeFiles/npu_compiler_build.dir/build.make:105: third_party/openvino/src/npu_compiler_build-stamp/npu_compilerd-install] Error 1
gmake[1]: *** [CMakeFiles/Makefile2:1375: compiler/CMakeFiles/npu_compiler_build.dir/all] Error 2
gmake: *** [Makefile:156: all] Error 2

(4) Find the debug lib under linux-npu-driver/build/third_party/npu_plugin/build-cid/bin/intel64/Debug

[jwludzik]

You need to change "Release" to "Debug" in the

linux-npu-driver/compiler/npu_compiler_build.cmake

Line 73 in 93fb54b

cp ${NPU_COMPILER_BINARY_DIR}/bin/intel64/Release/libnpu_driver_compiler.so

[zxue2]

Thanks Jozef. It would be great if how to enable debug info for compiler can be added to README or somewhere, because we can't simply enable it by adding CMAKE_BUILD_TYPE & CMAKE_CXX_FLAGS_DEBUG in the cmake build command directly.