101 lines
4.1 KiB
CMake
101 lines
4.1 KiB
CMake
#### gem5-specific stuff
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if(BUILD_GEM5)
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message(STATUS "[${PROJECT_NAME}] Building gem5 variant ...")
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SET(VARIANT gem5)
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set(gem5_src_dir ${PROJECT_SOURCE_DIR}/simulators/gem5)
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set(gem5_wrapper ${PROJECT_BINARY_DIR}/src/core/sal/gem5)
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set(gem5_build_config build/ARM/gem5.debug)
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## Determine the number of cores:
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set(core_count 0) # unknown
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# Linux:
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set(cpuinfo_file "/proc/cpuinfo")
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if(EXISTS "${cpuinfo_file}")
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file(STRINGS "${cpuinfo_file}" procs REGEX "^processor.: [0-9]+$")
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list(LENGTH procs core_count)
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endif()
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# Mac:
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if(APPLE)
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find_program(cmd_sys_pro "system_profiler")
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if(cmd_sys_pro)
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execute_process(COMMAND ${cmd_sys_pro} OUTPUT_VARIABLE info)
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string(REGEX REPLACE "^.*Total Number Of Cores: ([0-9]+).*$" "\\1"
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core_count "${info}")
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endif()
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endif()
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MATH(EXPR VAR "${core_count}+1") # CPU++
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MESSAGE(STATUS "Using ${core_count} core(s) for compiling with scons ...")
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# FIXMEs:
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# - ${core_count} should be derived from the parent make -jX parameter
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# - make ${gem5_build_config} configurable in CMake
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# (alternative: gem5_build_config is set based on the CMake build
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# config, e.g., "Debug" or "Release")
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# - Ideally, there is no additional "gem5-clean" target. Instead,
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# calling "make clean" should also invoke a clean command in the
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# gem5 root dir. This seems easy for "make only" projects--things
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# get shaky due to "scons".
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# Enable ExternalProject CMake module (located in $FAIL/cmake/)
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include(ExternalProjectGem5Specific)
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add_custom_target(gem5-force-re-linking
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COMMAND @echo "Removing gem5 binary and CMake build stamp ..."
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COMMAND rm "${gem5_src_dir}/${gem5_build_config}" -f
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COMMAND rm "${PROJECT_BINARY_DIR}/FailGem5_binary_external-prefix/src/FailGem5_binary_external-stamp/FailGem5_binary_external-build" -f
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)
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# WARNING: This requires a known (and "fixed") implementation of
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# ExternalProject_Add() because we enforce re-linking by deleting
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# some internal CMake time-stamp files generated by the external
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# project stuff. We therefore provide our own version
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# ("ExternalProjectGem5Specific") using a different name.
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# Generate gem5 headers using the scons build system (in our custom "dummy" mode):
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# This effectivly calls the whole gem5 toolchain but replaces the compiler, the
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# linker, ar and ranlib with usr/bin/true. It allows us to just generate the headers
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# which, in turn, are required for fail compilation. This target has no dependencies.
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ExternalProject_Add2_Gem5Specific(
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FailGem5_generation # the (unique) name of this custom target (= external project)
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# Disable update, patch and configure step:
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UPDATE_COMMAND ""
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PATCH_COMMAND ""
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CONFIGURE_COMMAND ""
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SOURCE_DIR ${gem5_src_dir}
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BINARY_DIR ${gem5_src_dir}
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BUILD_COMMAND scons ${gem5_build_config} --dummy
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# Disable install step (for now)
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INSTALL_COMMAND ""
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)
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# Use cmake's external project feature to build gem5 (and link FailGem5):
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ExternalProject_Add2_Gem5Specific(
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FailGem5_binary_external
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DEPENDS FailGem5_generation
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# Disable update, patch and configure step:
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UPDATE_COMMAND ""
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PATCH_COMMAND ""
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SOURCE_DIR ${gem5_src_dir}
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BINARY_DIR ${gem5_src_dir}
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CONFIGURE_COMMAND ""
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# Build gem5 using scons build system:
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BUILD_COMMAND scons "CXX=${CMAKE_CXX_COMPILER} -p ${gem5_src_dir} --Xcompiler" EXTRAS=${gem5_wrapper} ${gem5_build_config} -j${core_count}
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# Disable install step (for now)
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INSTALL_COMMAND ""
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)
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# Cleans up everything (gem5 and Fail related):
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add_custom_target(gem5-allclean
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COMMAND @echo "Cleaning FAIL* and gem5 ..."
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COMMAND cd "${PROJECT_BINARY_DIR}/" && make clean
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COMMAND cd "${gem5_src_dir}/" && scons -c build/ARM
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COMMAND cd "${gem5_src_dir}/" && rm -rf build/
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)
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# Resolve header dependencies first (i.e., generate the header files):
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add_dependencies(fail-sal FailGem5_generation)
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# Always enforce re-linking (bugfix for cmake/scons):
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add_dependencies(fail gem5-force-re-linking)
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# Re-build/link gem5 if Fail code has changed:
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add_dependencies(FailGem5_binary_external fail)
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endif(BUILD_GEM5)
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