Update from upstream #85
14
CHANGELOG.md
14
CHANGELOG.md
@ -59,6 +59,20 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
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## Additions
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- LTO support: Allow using LTO/IPO by setting `FSFW_ENABLE_LTO=1`. CMake is able to detect whether
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the user compiler supports IPO/LPO. LTO is on by default now. Most modern compilers support it,
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can make good use of it and it usually makes the code faster and/or smaller.
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After some more research:
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Enabling LTO will actually cause the compiler to only produce thin LTO by adding
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`-flto -fno-fat-lto-objects` to the compiler options. I am not sure this is an ideal choice
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because if an application linking against the FSFW does not use LTO, there can be compile
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issues (e.g. observed when compiling the FSFW tests without LTO). This is a known issue as
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can be seen in the multiple CMake issues for it:
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- https://gitlab.kitware.com/cmake/cmake/-/issues/22913,
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- https://gitlab.kitware.com/cmake/cmake/-/issues/16808,
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- https://gitlab.kitware.com/cmake/cmake/-/issues/21696
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Easiest solution for now: Keep this option OFF by default.
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PR: https://egit.irs.uni-stuttgart.de/fsfw/fsfw/pulls/616
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- Linux HAL: Add wiretapping option for I2C. Enabled with `FSFW_HAL_I2C_WIRETAPPING` defined to 1
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- Dedicated Version class and constant `fsfw::FSFW_VERSION` containing version information
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inside `fsfw/version.h`
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@ -59,6 +59,7 @@ endif()
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set(FSFW_SOURCES_DIR "${CMAKE_SOURCE_DIR}/src/fsfw")
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set(FSFW_ETL_LIB_NAME etl)
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set(FSFW_ETL_LIB_MAJOR_VERSION 20 CACHE STRING
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"ETL library major version requirement"
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)
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@ -74,7 +75,16 @@ set(FSFW_CATCH2_LIB_VERSION v${FSFW_CATCH2_LIB_MAJOR_VERSION}.0.0-preview5 CACHE
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"Catch2 library exact version requirement"
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)
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set(FSFW_ETL_LIB_NAME etl)
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# Keep this off by default for now. See PR: https://egit.irs.uni-stuttgart.de/fsfw/fsfw/pulls/616
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# for information which keeping this on by default is problematic
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option(FSFW_ENABLE_IPO "Enable interprocedural optimization or link-time optimization if available" OFF)
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if(FSFW_ENABLE_IPO)
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include(CheckIPOSupported)
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check_ipo_supported(RESULT IPO_SUPPORTED OUTPUT IPO_ERROR)
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if(NOT IPO_SUPPORTED)
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message(STATUS "FSFW | IPO/LTO not supported: ${IPO_ERROR}")
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endif()
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endif()
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option(FSFW_GENERATE_SECTIONS
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"Generate function and data sections. Required to remove unused code" ON
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@ -113,6 +123,9 @@ set(FSFW_DUMMY_TGT fsfw-dummy)
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add_library(${LIB_FSFW_NAME})
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if(IPO_SUPPORTED AND FSFW_ENABLE_IPO)
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set_property(TARGET ${LIB_FSFW_NAME} PROPERTY INTERPROCEDURAL_OPTIMIZATION TRUE)
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endif()
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if(FSFW_BUILD_UNITTESTS)
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message(STATUS "${MSG_PREFIX} Building the FSFW unittests in addition to the static library")
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@ -138,6 +151,9 @@ if(FSFW_BUILD_UNITTESTS)
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project(${FSFW_TEST_TGT} CXX C)
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add_executable(${FSFW_TEST_TGT})
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if(IPO_SUPPORTED AND FSFW_ENABLE_IPO)
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set_property(TARGET ${FSFW_TEST_TGT} PROPERTY INTERPROCEDURAL_OPTIMIZATION TRUE)
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endif()
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if(FSFW_TESTS_GEN_COV)
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message(STATUS "${MSG_PREFIX} Generating coverage data for the library")
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