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cmake_minimum_required(VERSION 3.1)
project(hydrogen LANGUAGES C)
include(CMakePackageConfigHelpers)
include(GNUInstallDirs)
string(TOUPPER "${PROJECT_NAME}" setting_prefix)
function(get_setting setting_name setting_type setting_description)
string(TOUPPER "${setting_prefix}_${setting_name}" setting_external_name)
set("${setting_external_name}" "" CACHE "${setting_type}" "${setting_description}")
set("${setting_name}" "${${setting_external_name}}" PARENT_SCOPE)
endfunction()
# Project files
set(source_files
"${PROJECT_NAME}.c"
"impl/common.h"
"impl/core.h"
"impl/gimli-core.h"
"impl/gimli-core/portable.h"
"impl/gimli-core/sse2.h"
"impl/hash.h"
"impl/${PROJECT_NAME}_p.h"
"impl/kdf.h"
"impl/kx.h"
"impl/pwhash.h"
"impl/random.h"
"impl/secretbox.h"
"impl/sign.h"
"impl/x25519.h")
set(header_files "${PROJECT_NAME}.h")
set(test_files "tests/tests.c")
set(arduino_files "library.properties")
# Compile options
get_setting(target_arch STRING "Target system architecture (fed to the compiler's -march=XXX).")
if(NOT target_arch AND NOT CMAKE_CROSSCOMPILING)
set(target_arch native)
endif()
get_setting(target_device STRING "Target device identifier (defines HYDRO_TARGET_DEVICE_XXX).")
set(compile_options
# --- GNU, Clang ---
$<$<OR:$<C_COMPILER_ID:AppleClang>,$<C_COMPILER_ID:Clang>,$<C_COMPILER_ID:GNU>>:
# ---- Definitions ----
$<$<BOOL:${target_device}>:-DHYDRO_TARGET_DEVICE_${target_device}>
# ---- Optimizations ----
-Os $<$<BOOL:${target_arch}>:-march=${target_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
>
# --- MSVC ---
$<$<C_COMPILER_ID:MSVC>:
# ---- Definitions ----
$<$<BOOL:${target_device}>:/DHYDRO_TARGET_DEVICE_${target_device}>
# ---- Optimizations ----
/Os /EHsc
# ---- Warnings ----
/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"
>)
# Prefix project files with the project root
# 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 ${compile_options})
# Installation
set(targets_export_name "${PROJECT_NAME}-targets")
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
set(install_config_dir "${CMAKE_INSTALL_DATADIR}/cmake/${PROJECT_NAME}")
set(targets_export_file_name "${targets_export_name}.cmake")
set(targets_export_file "${PROJECT_BINARY_DIR}/${targets_export_file_name}")
install(EXPORT "${targets_export_name}"
FILE "${targets_export_file_name}"
NAMESPACE "${PROJECT_NAME}::"
DESTINATION "${install_config_dir}")
set(config_file_name "${PROJECT_NAME}-config.cmake")
set(config_template_file "${PROJECT_SOURCE_DIR}/cmake/${config_file_name}.in")
set(config_file "${PROJECT_BINARY_DIR}/${config_file_name}")
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 "${PROJECT_NAME}")
# Tests
set(tests_executable "${PROJECT_NAME}-tests")
set(tests_run_target "${PROJECT_NAME}-run-tests")
set(tests_run_file "${PROJECT_BINARY_DIR}/${tests_run_target}.done")
enable_testing()
add_executable("${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 "${tests_executable}")
if(CMAKE_CROSSCOMPILING)
# Disable tests executable by default when cross-compiling (as it will fail to build when, e.g.,
# cross-compiling for Arduino/AVR).
set_target_properties("${tests_executable}"
PROPERTIES
EXCLUDE_FROM_ALL 1
EXCLUDE_FROM_DEFAULT_BUILD 1)
else()
# Otherwise, auto-run the tests on build.
add_custom_command(OUTPUT "${tests_run_file}"
DEPENDS "${tests_executable}"
COMMAND "${CMAKE_COMMAND}"
ARGS -E remove "${tests_run_file}"
COMMAND "${CMAKE_CTEST_COMMAND}"
ARGS -C $<CONFIGURATION> --output-on-failure
COMMAND "${CMAKE_COMMAND}"
ARGS -E touch "${tests_run_file}"
WORKING_DIRECTORY "${PROJECT_BINARY_DIR}"
VERBATIM)
add_custom_target("${tests_run_target}" ALL DEPENDS "${tests_run_file}" VERBATIM)
endif()
# Generate Arduino package
set(arduino_package_file "${PROJECT_BINARY_DIR}/hydrogen-crypto.zip")
# Use the relative versions of the file path lists or else the full paths will end up in the
# generated archive.
add_custom_command(OUTPUT "${arduino_package_file}"
COMMAND "${CMAKE_COMMAND}"
ARGS -E
tar
cf
"${arduino_package_file}"
--format=zip
--
${source_files}
${header_files}
${arduino_files}
WORKING_DIRECTORY "${PROJECT_SOURCE_DIR}"
VERBATIM)
add_custom_target("${PROJECT_NAME}-arduino-package" DEPENDS "${arduino_package_file}" VERBATIM)