Cmake: Reslove LTO linker issue (#384)

* Allow release builds with CMake * Reslove lto object issue using slim objects. Props @recursinging
electro-smith · Jul 21, 2021 · f62f85e · f62f85e
1 parent 6946b37
commit f62f85e
Showing 1 changed file with 7 additions and 0 deletions.
diff --git a/cmake/toolchains/stm32h750xx.cmake b/cmake/toolchains/stm32h750xx.cmake
@@ -33,6 +33,13 @@ set(CMAKE_C_FLAGS   "${OBJECT_GEN_FLAGS} -std=gnu99 " CACHE INTERNAL "C Compiler
 set(CMAKE_CXX_FLAGS "${OBJECT_GEN_FLAGS} -Wno-register" CACHE INTERNAL "C++ Compiler options")
 set(CMAKE_ASM_FLAGS "${OBJECT_GEN_FLAGS} -x assembler-with-cpp " CACHE INTERNAL "ASM Compiler options")
 
+# Ensure the ar plugin is loaded (needed for LTO)
+set(CMAKE_AR ${TOOLCHAIN_BIN_DIR}/${TOOLCHAIN}-gcc-ar)
+set(CMAKE_C_ARCHIVE_CREATE "<CMAKE_AR> qcs <TARGET> <LINK_FLAGS> <OBJECTS>")
+set(CMAKE_C_ARCHIVE_FINISH   true)
+set(CMAKE_CXX_ARCHIVE_CREATE "<CMAKE_AR> qcs <TARGET> <LINK_FLAGS> <OBJECTS>")
+set(CMAKE_CXX_ARCHIVE_FINISH   true)
+
 add_compile_definitions(
         CORE_CM7
         STM32H750xx