diff options
| -rw-r--r-- | CMakeLists.txt | 49 |
1 files changed, 47 insertions, 2 deletions
diff --git a/CMakeLists.txt b/CMakeLists.txt index 6c75b5688..46e22b7e0 100644 --- a/CMakeLists.txt +++ b/CMakeLists.txt @@ -95,8 +95,53 @@ ELSE() SET(CMAKE_THREAD_PREFER_PTHREAD ON) FIND_PACKAGE(Threads REQUIRED) ADD_COMPILE_FLAG("-std=c++11") - ADD_COMPILE_FLAG("-msse2") - ADD_COMPILE_FLAG("-mfpmath=sse") + if (NOT EMSCRIPTEN) + # try to get the target architecture by compiling a dummy.c file and + # checking the architecture using the file command. + file(WRITE ${PROJECT_BINARY_DIR}/dummy.c "main(){}") + try_compile( + COMPILE_OK + ${PROJECT_BINARY_DIR} + ${PROJECT_BINARY_DIR}/dummy.c + COPY_FILE ${PROJECT_BINARY_DIR}/dummy + ) + if (COMPILE_OK) + execute_process( + COMMAND file ${PROJECT_BINARY_DIR}/dummy + RESULT_VARIABLE FILE_RESULT + OUTPUT_VARIABLE FILE_OUTPUT + ERROR_QUIET + ) + + if (FILE_RESULT EQUAL 0) + if (${FILE_OUTPUT} MATCHES "x86[-_]64") + set(TARGET_ARCH "x86-64") + elseif (${FILE_OUTPUT} MATCHES "Intel 80386") + set(TARGET_ARCH "i386") + elseif (${FILE_OUTPUT} MATCHES "ARM") + set(TARGET_ARCH "ARM") + else () + message(WARNING "Unknown target architecture!") + endif () + if(TARGET_ARCH) + MESSAGE(STATUS "Building for platform ${TARGET_ARCH}") + endif () + else () + message(WARNING "Error running file on dummy executable") + endif () + else () + message(WARNING "Error compiling dummy.c file") + endif () + + if (TARGET_ARCH STREQUAL "i386") + # wasm doesn't allow for x87 floating point math + ADD_COMPILE_FLAG("-msse2") + ADD_COMPILE_FLAG("-mfpmath=sse") + elseif(TARGET_ARCH STREQUAL "ARM") + # stub for ARM-specific instructions. GCC6 adds NEON with the below flags + ADD_COMPILE_FLAG("-march=native") + endif () + endif () ADD_COMPILE_FLAG("-Wall") ADD_COMPILE_FLAG("-Werror") ADD_COMPILE_FLAG("-Wextra") |