53 lines
2.7 KiB
CMake
53 lines
2.7 KiB
CMake
project(mycryptopp)
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add_library(cryptopp dummy.cpp)
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# note: include directory is called vendor_cryptopp instead of cryptopp to avoid include clashes with system headers
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target_include_directories(cryptopp SYSTEM INTERFACE ${CMAKE_CURRENT_SOURCE_DIR})
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if (CMAKE_BUILD_TYPE STREQUAL "Debug")
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target_compile_definitions(cryptopp PUBLIC -DCRYPTOPP_DEBUG) # add to all targets depending on this
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add_compile_options(-DCRYPTOPP_DEBUG) # add to stuff built in subdirectories (like the actual library)
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endif()
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if(NOT DISABLE_OPENMP)
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if((APPLE AND ((CMAKE_CXX_COMPILER_ID STREQUAL "AppleClang") OR (CMAKE_CXX_COMPILER_ID STREQUAL "Clang")))
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AND ((CMAKE_CXX_COMPILER_VERSION VERSION_GREATER_EQUAL "7.0") AND (CMAKE_VERSION VERSION_LESS "3.12.0")))
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# Workaround because older cmake on apple doesn't support FindOpenMP
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message(STATUS "Applying workaround for OSX OpenMP")
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set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Xclang -fopenmp")
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target_compile_options(cryptopp PUBLIC -Xclang -fopenmp) # also add these flags to all libraries depending on this
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target_link_libraries(cryptopp PRIVATE -lomp)
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elseif(MSVC)
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message(WARNING "MSVC does not support the OpenMP 4.0 standard used by Crypto++. Disabling OpenMP. This can cause degraded performance.")
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else()
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find_package(OpenMP)
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if (NOT OpenMP_CXX_LIBRARIES)
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# Older CMake didn't have OpenMP_CXX_LIBRARIES defined yet, but passed the library in OpenMP_CXX_FLAGS
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message(STATUS "We are on an older CMake that does not set OpenMP_CXX_LIBRARIES. Setting it from OpenMP_CXX_FLAGS.")
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set(OpenMP_CXX_LIBRARIES ${OpenMP_CXX_FLAGS})
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endif()
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if(OPENMP_FOUND)
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message(STATUS "Using OpenMP flags: ${OpenMP_CXX_FLAGS}")
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message(STATUS "Using OpenMP library: ${OpenMP_CXX_LIBRARIES}")
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set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${OpenMP_CXX_FLAGS}")
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target_link_libraries(cryptopp PRIVATE ${OpenMP_CXX_LIBRARIES})
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# also add these flags to all libraries depending on this
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string(REPLACE " " ";" REPLACED_FLAGS ${OpenMP_CXX_FLAGS})
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target_compile_options(cryptopp PUBLIC ${REPLACED_FLAGS})
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else(OPENMP_FOUND)
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message(FATAL_ERROR "Did not find OpenMP. Build with -DDISABLE_OPENMP=ON if you want to allow this and are willing to take the performance hit.")
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endif(OPENMP_FOUND)
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endif()
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else(NOT DISABLE_OPENMP)
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message(WARNING "OpenMP is disabled. This can cause degraded performance.")
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endif(NOT DISABLE_OPENMP)
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set(BUILD_TESTING OFF)
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set(BUILD_DOCUMENTATION OFF)
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set(BUILD_SHARED OFF)
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set(BUILD_STATIC ON)
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add_subdirectory(vendor_cryptopp EXCLUDE_FROM_ALL)
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target_link_libraries(cryptopp PRIVATE cryptopp-static)
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