Produce debug information packages for IGC

Generate debug symbols during `Release` builds. For all
configurations, pack IGC debug symbols into `.ddeb` archives and copy
those into the artifacts folder alongside the regular Debian packages.

For reference on the chosen CMake version limitations, see CMake GitLab
issue: https://gitlab.kitware.com/cmake/cmake/-/issues/21356.

Author: Artem Gindinson

IGC/CMakeLists.txt

@@ -210,6 +210,17 @@ set_source_files_properties(${IGC_CODEGEN_DIR}/MDNodeFunctions.gen PROPERTIES GE
 # The section must be after project definition and its supported languages because otherwise
 # used variables are not available yet.
 
+# Generate debug symbols even in release mode, thus making it possible to produce
+# separate Debian/RPM debug information packages.
+# FIXME: Instead of hacking the release build flags, consider using CMake's
+# RelWithDebInfo build type.
+if(UNIX)
+  set(CMAKE_C_FLAGS_RELEASE "${CMAKE_C_FLAGS_RELEASE} -g")
+  set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} -g")
+  set(CMAKE_SHARED_LINKER_FLAGS_RELEASE "${CMAKE_SHARED_LINKER_FLAGS_RELEASE} -g")
+  set(CMAKE_EXE_LINKER_FLAGS_RELEASE "${CMAKE_EXE_LINKER_FLAGS_RELEASE} -g")
+endif()
+
 
 # Populating global property with list of debug configurations (based on pattern).
 set(_debugConfigs)
@@ -2062,6 +2073,11 @@ if(UNIX)
   set(CPACK_ARCHIVE_IGC-OPENCL_FILE_NAME "intel-igc-opencl-${CPACK_PACKAGE_VERSION}.${CPACK_PACKAGE_ARCHITECTURE}")
   set(CPACK_ARCHIVE_IGC-OPENCL-DEVEL_FILE_NAME "intel-igc-opencl-devel-${CPACK_PACKAGE_VERSION}.${CPACK_PACKAGE_ARCHITECTURE}")
 
+  # Create separate debug symbol packages if the CMake/CPack version in use
+  # provides stable support for that functionality.
+  if (NOT CMAKE_VERSION VERSION_LESS 3.20)
+    set(CPACK_DEBIAN_DEBUGINFO_PACKAGE ON)
+  endif()
   set(CPACK_DEB_COMPONENT_INSTALL ON)
   set(CPACK_RPM_COMPONENT_INSTALL ON)
   set(CPACK_ARCHIVE_COMPONENT_INSTALL ON)

scripts/buildIGC.sh

@@ -106,5 +106,6 @@ make -j`nproc`
 echo "[Build Status] make DONE"
 cpack
 mkdir DEB-FILES && mv ./*.deb ./DEB-FILES
+mkdir DEB-FILES/dbgsym && mv ./*.ddeb ./DEB-FILES/dbgsym
 echo "[Build Status] cpack DONE"
 echo "====================BUILD IGC========================="