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eef3e020c2
Migrate tutorial text from individual `directions.txt` files to the main tutorial document. Add some comments to source code to provide anchors for inclusion.
62 lines
2.0 KiB
CMake
62 lines
2.0 KiB
CMake
# add the library that runs
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add_library(MathFunctions MathFunctions.cxx)
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# state that anybody linking to us needs to include the current source dir
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# to find MathFunctions.h, while we don't.
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target_include_directories(MathFunctions
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INTERFACE ${CMAKE_CURRENT_SOURCE_DIR}
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)
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# should we use our own math functions
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option(USE_MYMATH "Use tutorial provided math implementation" ON)
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if(USE_MYMATH)
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# does this system provide the log and exp functions?
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include(CheckSymbolExists)
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set(CMAKE_REQUIRED_LIBRARIES "m")
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check_symbol_exists(log "math.h" HAVE_LOG)
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check_symbol_exists(exp "math.h" HAVE_EXP)
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# first we add the executable that generates the table
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add_executable(MakeTable MakeTable.cxx)
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# add the command to generate the source code
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add_custom_command(
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OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/Table.h
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COMMAND MakeTable ${CMAKE_CURRENT_BINARY_DIR}/Table.h
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DEPENDS MakeTable
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)
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# library that just does sqrt
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add_library(SqrtLibrary STATIC
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mysqrt.cxx
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${CMAKE_CURRENT_BINARY_DIR}/Table.h
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)
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# state that we depend on our binary dir to find Table.h
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target_include_directories(SqrtLibrary PRIVATE
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${CMAKE_CURRENT_BINARY_DIR}
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)
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# state that SqrtLibrary need PIC when the default is shared libraries
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set_target_properties(SqrtLibrary PROPERTIES
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POSITION_INDEPENDENT_CODE ${BUILD_SHARED_LIBS}
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)
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target_compile_definitions(MathFunctions PRIVATE "USE_MYMATH")
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if(HAVE_LOG AND HAVE_EXP)
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target_compile_definitions(SqrtLibrary
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PRIVATE "HAVE_LOG" "HAVE_EXP")
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endif()
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target_link_libraries(MathFunctions PRIVATE SqrtLibrary)
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endif()
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# define the symbol stating we are using the declspec(dllexport) when
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# building on windows
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target_compile_definitions(MathFunctions PRIVATE "EXPORTING_MYMATH")
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# install rules
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install(TARGETS MathFunctions DESTINATION lib)
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install(FILES MathFunctions.h DESTINATION include)
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