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| author | JF002 <JF002@users.noreply.github.com> | 2021-06-01 21:03:01 +0200 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2021-06-01 21:03:01 +0200 |
| commit | 1b6acdedc2ae892bece04479a64ad28120eced8c (patch) | |
| tree | 08e470ec01c51ccbefd0be1759efe0177484821c /cmake-nRF5x/CMake_nRF5x.cmake | |
| parent | c0b0f8cb732f0cd8c6a519a97f41b0ef6275a24f (diff) | |
Enable various compilation flags to reduce the binary size (#401)
* Add the following compilation flags:
* -fno-exceptions and -fno-non-call-exceptions : disable exception handling
* -fno-rtti : disable run time type information (needed by dynamic_cast, for example)
These flags reduce the binary size by about 100KB!
Also, -fstack-usage generate debug info (not in final binary) to allow tools like Puncover to do a stack analysis.
* Remove unused CMake variables in CMake_nRF5x.cmake (duplicated in src/CMakeLists.txt).
Replace -O0 by -Og in DEBUG builds. This generates a smaller binary (small enough for the internal memory) that is debugger friendly.
Diffstat (limited to 'cmake-nRF5x/CMake_nRF5x.cmake')
| -rwxr-xr-x | cmake-nRF5x/CMake_nRF5x.cmake | 15 |
1 files changed, 0 insertions, 15 deletions
diff --git a/cmake-nRF5x/CMake_nRF5x.cmake b/cmake-nRF5x/CMake_nRF5x.cmake index ead7b9f6..c7d0a68b 100755 --- a/cmake-nRF5x/CMake_nRF5x.cmake +++ b/cmake-nRF5x/CMake_nRF5x.cmake @@ -74,21 +74,6 @@ macro(nRF5x_setup) ) endif () - set(COMMON_FLAGS "-MP -MD -mthumb -mabi=aapcs -Wall -g3 -ffunction-sections -fdata-sections -fno-strict-aliasing -fno-builtin --short-enums ${CPU_FLAGS} -Wreturn-type -Werror=return-type") - - # compiler/assambler/linker flags - set(CMAKE_C_FLAGS "${COMMON_FLAGS}") - set(CMAKE_C_FLAGS_DEBUG "${CMAKE_C_FLAGS_DEBUG} -O0 -g3") - set(CMAKE_C_FLAGS_RELEASE "${CMAKE_C_FLAGS_RELEASE} -O3") - set(CMAKE_CXX_FLAGS "${COMMON_FLAGS}") - set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} -O0 -g3") - set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} -O3") - set(CMAKE_ASM_FLAGS "-MP -MD -x assembler-with-cpp") - set(CMAKE_EXE_LINKER_FLAGS "-mthumb -mabi=aapcs -L ${NRF5_SDK_PATH}/modules/nrfx/mdk -T${NRF5_LINKER_SCRIPT} ${CPU_FLAGS} -Wl,--gc-sections --specs=nano.specs -lc -lnosys -lm") - # note: we must override the default cmake linker flags so that CMAKE_C_FLAGS are not added implicitly - set(CMAKE_C_LINK_EXECUTABLE "${CMAKE_C_COMPILER} <LINK_FLAGS> <OBJECTS> -o <TARGET> <LINK_LIBRARIES>") - set(CMAKE_CXX_LINK_EXECUTABLE "${CMAKE_C_COMPILER} <LINK_FLAGS> <OBJECTS> -lstdc++ -o <TARGET> <LINK_LIBRARIES>") - # basic board definitions and drivers include_directories( "${NRF5_SDK_PATH}/components" |