Initial commit

cmake/toolchain.cmake

@@ -0,0 +1,109 @@
+
+if(NOT TOOLCHAIN_PATH)
+    if(DEFINED ENV{TOOLCHAIN_PATH})
+        message(STATUS "Detected toolchain path TOOLCHAIN_PATH in environmental variables: " $ENV{TOOLCHAIN_PATH})
+        set(TOOLCHAIN_PATH $ENV{TOOLCHAIN_PATH})
+    else()
+        if(NOT CMAKE_C_COMPILER)
+            set(TOOLCHAIN_PATH "/usr")
+            message(STATUS "No TOOLCHAIN_PATH specified, using default: " ${TOOLCHAIN_PATH})
+        else()
+            # keep only directory of compiler
+            get_filename_component(TOOLCHAIN_PATH ${CMAKE_C_COMPILER} DIRECTORY)
+            # remove the last /bin directory
+            get_filename_component(TOOLCHAIN_PATH ${TOOLCHAIN_PATH} DIRECTORY)
+        endif()
+    endif()
+    file(TO_CMAKE_PATH "${TOOLCHAIN_PATH}" TOOLCHAIN_PATH)
+endif()
+
+if(NOT TARGET_TRIPLET)
+    set(TARGET_TRIPLET "arm-none-eabi")
+    message(STATUS "No TARGET_TRIPLET specified, using default: " ${TARGET_TRIPLET})
+endif()
+
+set(CMAKE_SYSTEM_NAME Generic)
+
+set(TOOLCHAIN_SYSROOT  "${TOOLCHAIN_PATH}/${TARGET_TRIPLET}")
+set(TOOLCHAIN_BIN_PATH "${TOOLCHAIN_PATH}/bin")
+set(TOOLCHAIN_INC_PATH "${TOOLCHAIN_PATH}/${TARGET_TRIPLET}/include")
+set(TOOLCHAIN_LIB_PATH "${TOOLCHAIN_PATH}/${TARGET_TRIPLET}/lib")
+
+find_program(CMAKE_OBJCOPY NAMES ${TARGET_TRIPLET}-objcopy HINTS ${TOOLCHAIN_BIN_PATH})
+find_program(CMAKE_OBJDUMP NAMES ${TARGET_TRIPLET}-objdump HINTS ${TOOLCHAIN_BIN_PATH})
+find_program(CMAKE_SIZE NAMES ${TARGET_TRIPLET}-size HINTS ${TOOLCHAIN_BIN_PATH})
+
+function(print_size_of_target TARGET)
+    add_custom_target(${TARGET}_always_display_size
+            ALL COMMAND ${CMAKE_SIZE} "$<TARGET_FILE:${TARGET}>"
+            COMMENT "Target Sizes: "
+            DEPENDS ${TARGET}
+            )
+endfunction()
+
+function(_generate_file TARGET OUTPUT_EXTENSION OBJCOPY_BFD_OUTPUT)
+    get_target_property(TARGET_OUTPUT_NAME ${TARGET} OUTPUT_NAME)
+    if (TARGET_OUTPUT_NAME)
+        set(OUTPUT_FILE_NAME "${TARGET_OUTPUT_NAME}.${OUTPUT_EXTENSION}")
+    else()
+        set(OUTPUT_FILE_NAME "${TARGET}.${OUTPUT_EXTENSION}")
+    endif()
+
+    get_target_property(RUNTIME_OUTPUT_DIRECTORY ${TARGET} RUNTIME_OUTPUT_DIRECTORY)
+    if(RUNTIME_OUTPUT_DIRECTORY)
+        set(OUTPUT_FILE_PATH "${RUNTIME_OUTPUT_DIRECTORY}/${OUTPUT_FILE_NAME}")
+    else()
+        set(OUTPUT_FILE_PATH "${OUTPUT_FILE_NAME}")
+    endif()
+
+    add_custom_command(
+            TARGET ${TARGET}
+            POST_BUILD
+            COMMAND ${CMAKE_OBJCOPY} -O ${OBJCOPY_BFD_OUTPUT} "$<TARGET_FILE:${TARGET}>" ${OUTPUT_FILE_PATH}
+            BYPRODUCTS ${OUTPUT_FILE_PATH}
+            COMMENT "Generating ${OBJCOPY_BFD_OUTPUT} file ${OUTPUT_FILE_NAME}"
+    )
+endfunction()
+
+function(generate_binary_file TARGET)
+    _generate_file(${TARGET} "bin" "binary")
+endfunction()
+
+function(generate_hex_file TARGET)
+    _generate_file(${TARGET} "hex" "ihex")
+endfunction()
+
+set(CMAKE_EXECUTABLE_SUFFIX_C   .elf)
+set(CMAKE_EXECUTABLE_SUFFIX_CXX .elf)
+set(CMAKE_EXECUTABLE_SUFFIX_ASM .elf)
+
+# This should be safe to set for a bare-metal cross-compiler
+set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
+
+
+# Extra CFlags
+set(TARGET_CFLAGS_EXTRA   "-Wall -fdata-sections -ffunction-sections -fno-common -fmessage-length=0")
+set(TARGET_CXXFLAGS_EXTRA "-Wall -fdata-sections -ffunction-sections -fno-common -fmessage-length=0")
+set(TARGET_LDFLAGS_EXTRA  "-Wl,--print-memory-usage")
+
+# Device specific settings, goes to CFLAGS and LDFLAGS
+set(TARGET_CFLAGS_HARDWARE "-mcpu=cortex-m23 -mfloat-abi=soft -mthumb -mthumb-interwork")
+
+# Conditional flags
+# DEBUG
+set(CMAKE_C_FLAGS_DEBUG     "-DDEBUG=0 -O0 -g")
+set(CMAKE_CXX_FLAGS_DEBUG   "-DDEBUG=0 -O0 -g")
+set(CMAKE_ASM_FLAGS_DEBUG   "-DDEBUG=0 -O0 -g")
+
+# RELEASE
+set(CMAKE_C_FLAGS_RELEASE        "-DNDEBUG -O3") #  -flto
+set(CMAKE_CXX_FLAGS_RELEASE      "-DNDEBUG -O3") #  -flto
+set(CMAKE_ASM_FLAGS_RELEASE      "-DNDEBUG -O3") #  -flto
+#set(CMAKE_EXE_LINKER_FLAGS_RELEASE "-flto")
+
+# Final compiler flags
+set(CMAKE_C_FLAGS          "${CMAKE_C_FLAGS} ${TARGET_CFLAGS_HARDWARE} ${TARGET_CFLAGS_EXTRA}")
+set(CMAKE_CXX_FLAGS        "${CMAKE_CXX_FLAGS} ${TARGET_CFLAGS_HARDWARE} ${TARGET_CXXFLAGS_EXTRA}")
+set(CMAKE_ASM_FLAGS        "${CMAKE_ASM_FLAGS} ${CMAKE_C_FLAGS} -x assembler-with-cpp")
+set(CMAKE_EXE_LINKER_FLAGS "--specs=nano.specs --specs=nosys.specs -Wall -Wextra -Wl,--gc-sections ${TARGET_LDFLAGS_EXTRA}")
+# -fsigned-char maybe