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cmake_minimum_required(VERSION 3.10)
project(hydrogen
LANGUAGES C)
include(CMakePackageConfigHelpers)
include(GNUInstallDirs)
if(NOT CMAKE_CROSSCOMPILING)
set(default_build_arch native)
endif()
set(BUILD_ARCH "${default_build_arch}" CACHE STRING
"Target system architecture (fed to the compiler's -march=...)")
set(compile_options
$<$<OR:$<C_COMPILER_ID:AppleClang>,$<C_COMPILER_ID:Clang>,$<C_COMPILER_ID:GNU>>:
# Optimizations
-Os $<$<BOOL:${BUILD_ARCH}>:-march=${BUILD_ARCH}> -fno-exceptions
# Warnings
-Wall -Wextra -Wmissing-prototypes -Wdiv-by-zero -Wbad-function-cast -Wcast-align
-Wcast-qual -Wfloat-equal -Wmissing-declarations -Wnested-externs -Wno-unknown-pragmas
-Wpointer-arith -Wredundant-decls -Wstrict-prototypes -Wswitch-enum -Wno-type-limits>
$<$<C_COMPILER_ID:MSVC>:
# Optimizations
/Os /EHsc
# Warnings
/WX /W4
/wd4197 # suppress warning "top-level volatile in cast is ignored"
/wd4146 # suppress warning "unary minus operator applied to unsigned type, result still unsigned"
/wd4310 # suppress warning "cast truncates constant value"
>)
set(source_files
"${PROJECT_SOURCE_DIR}/${PROJECT_NAME}.c"
"${PROJECT_SOURCE_DIR}/impl/common.h"
"${PROJECT_SOURCE_DIR}/impl/core.h"
"${PROJECT_SOURCE_DIR}/impl/gimli-core.h"
"${PROJECT_SOURCE_DIR}/impl/gimli-core/portable.h"
"${PROJECT_SOURCE_DIR}/impl/gimli-core/sse2.h"
"${PROJECT_SOURCE_DIR}/impl/hash.h"
"${PROJECT_SOURCE_DIR}/impl/${PROJECT_NAME}_p.h"
"${PROJECT_SOURCE_DIR}/impl/kdf.h"
"${PROJECT_SOURCE_DIR}/impl/kx.h"
"${PROJECT_SOURCE_DIR}/impl/pwhash.h"
"${PROJECT_SOURCE_DIR}/impl/random.h"
"${PROJECT_SOURCE_DIR}/impl/secretbox.h"
"${PROJECT_SOURCE_DIR}/impl/sign.h"
"${PROJECT_SOURCE_DIR}/impl/x25519.h")
set(header_files
"${PROJECT_SOURCE_DIR}/${PROJECT_NAME}.h")
set(test_files
"${PROJECT_SOURCE_DIR}/tests/tests.c")
set(config_file_name "${PROJECT_NAME}-config.cmake")
set(config_template_file "${PROJECT_SOURCE_DIR}/${config_file_name}.in")
set(config_file "${PROJECT_BINARY_DIR}/${config_file_name}")
set(targets_export_name "${PROJECT_NAME}-targets")
set(targets_export_file_name "${targets_export_name}.cmake")
set(targets_export_file "${PROJECT_BINARY_DIR}/${targets_export_file_name}")
set(install_config_dir "${CMAKE_INSTALL_DATADIR}/cmake/${PROJECT_NAME}")
set(tests_executable "${PROJECT_NAME}-tests")
set(tests_done_target "${tests_executable}-done")
set(tests_done_file "${PROJECT_BINARY_DIR}/${tests_executable}.done")
# Main library
add_library("${PROJECT_NAME}")
add_library("${PROJECT_NAME}::${PROJECT_NAME}" ALIAS "${PROJECT_NAME}")
target_sources("${PROJECT_NAME}" PRIVATE ${source_files})
target_include_directories("${PROJECT_NAME}" PUBLIC
$<BUILD_INTERFACE:${PROJECT_SOURCE_DIR}>
$<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>)
target_compile_options(${PROJECT_NAME} PRIVATE ${compile_options})
# Installation
install(TARGETS "${PROJECT_NAME}"
EXPORT "${targets_export_name}"
LIBRARY DESTINATION "${CMAKE_INSTALL_LIBDIR}"
ARCHIVE DESTINATION "${CMAKE_INSTALL_LIBDIR}")
install(FILES ${header_files}
DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}")
# CMake find_package() support
install(EXPORT "${targets_export_name}"
FILE "${targets_export_file_name}"
NAMESPACE "${PROJECT_NAME}::"
DESTINATION "${install_config_dir}")
CONFIGURE_PACKAGE_CONFIG_FILE("${config_template_file}" "${config_file}"
INSTALL_DESTINATION "${install_config_dir}")
install(FILES ${config_file}
DESTINATION ${install_config_dir})
export(EXPORT "${targets_export_name}"
FILE "${targets_export_file}"
NAMESPACE "${PROJECT_NAME}::")
export(PACKAGE "${PROJECT_NAME}")
# Tests
enable_testing()
add_executable("${tests_executable}" ${test_files})
target_compile_options("${tests_executable}" PRIVATE ${compile_options})
target_link_libraries("${tests_executable}" "${PROJECT_NAME}")
add_test(NAME "${tests_executable}" COMMAND "${tests_executable}")
# Auto-run tests on build (unless cross-compiling)
if(NOT CMAKE_CROSSCOMPILING)
add_custom_command(OUTPUT "${tests_done_file}"
DEPENDS "${tests_executable}"
COMMAND cmake
ARGS -E remove "${tests_done_file}"
COMMAND ctest
ARGS -C $<CONFIGURATION> --output-on-failure
COMMAND cmake
ARGS -E touch "${tests_done_file}"
WORKING_DIRECTORY "${PROJECT_BINARY_DIR}")
add_custom_target("${tests_done_target}" ALL DEPENDS "${tests_done_file}")
endif()
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