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Merge remote-tracking branch 'origin/development' into mueller/refactor-logging-with-fmt

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Robin Müller 2022-05-12 17:38:01 +02:00
parent eafbab9c65 b99160e850
commit 23c6145971
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2 changed files with 19 additions and 13 deletions
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10
CHANGELOG.md
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@ -49,6 +49,16 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
- LTO support: Allow using LTO/IPO by setting `FSFW_ENABLE_LTO=1`. CMake is able to detect whether
the user compiler supports IPO/LPO. LTO is on by default now. Most modern compilers support it,
can make good use of it and it usually makes the code faster and/or smaller.
After some more research:
Enabling LTO will actually cause the compiler to only produce thin LTO by adding
`-flto -fno-fat-lto-objects` to the compiler options. I am not sure this is an ideal choice
because if an application linking against the FSFW does not use LTO, there can be compile
issues (e.g. observed when compiling the FSFW tests without LTO). This is a known issue as
can be seen in the multiple CMake issues for it:
- https://gitlab.kitware.com/cmake/cmake/-/issues/22913,
- https://gitlab.kitware.com/cmake/cmake/-/issues/16808,
- https://gitlab.kitware.com/cmake/cmake/-/issues/21696
Easiest solution for now: Keep this option OFF by default.
PR: https://egit.irs.uni-stuttgart.de/fsfw/fsfw/pulls/616
- Linux HAL: Add wiretapping option for I2C. Enabled with `FSFW_HAL_I2C_WIRETAPPING` defined to 1
- Dedicated Version class and constant `fsfw::FSFW_VERSION` containing version information

22
CMakeLists.txt
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@ -40,21 +40,17 @@ set(FSFW_FMT_LIB_VERSION v${FSFW_FMT_LIB_MAJOR_VERSION}.1.1 CACHE STRING
"{fmt} library exact version requirement"
)
include(CheckIPOSupported)
check_ipo_supported(RESULT IPO_SUPPORTED OUTPUT IPO_ERROR)
if(NOT IPO_SUPPORTED)
message(STATUS "FSFW | IPO/LTO not supported: ${IPO_ERROR}")
# Keep this off by default for now. See PR: https://egit.irs.uni-stuttgart.de/fsfw/fsfw/pulls/616
# for information which keeping this on by default is problematic
option(FSFW_ENABLE_IPO "Enable interprocedural optimization or link-time optimization if available" OFF)
if(FSFW_ENABLE_IPO)
include(CheckIPOSupported)
check_ipo_supported(RESULT IPO_SUPPORTED OUTPUT IPO_ERROR)
if(NOT IPO_SUPPORTED)
message(STATUS "FSFW | IPO/LTO not supported: ${IPO_ERROR}")
endif()
endif()
option(FSFW_ENABLE_IPO "Enable interprocedural optimization or link-time optimization if available" ON)
include(CheckIPOSupported)
check_ipo_supported(RESULT IPO_SUPPORTED OUTPUT IPO_ERROR)
if(NOT IPO_SUPPORTED)
message(STATUS "FSFW | IPO/LTO not supported: ${IPO_ERROR}")
endif()
option(FSFW_ENABLE_IPO "Enable interprocedural optimization or link-time optimization if available" ON)
option(FSFW_GENERATE_SECTIONS
"Generate function and data sections. Required to remove unused code" ON
)