build: Add CMake-based build system

Co-authored-by: Tim Ruffing <crypto@timruffing.de>

src/CMakeLists.txt

@@ -0,0 +1,127 @@
+# Must be included before CMAKE_INSTALL_INCLUDEDIR is used.
+include(GNUInstallDirs)
+set(${PROJECT_NAME}_installables "")
+
+if(SECP256K1_ASM STREQUAL "arm")
+  add_library(common OBJECT
+    asm/field_10x26_arm.s
+  )
+  set(common_obj "$<TARGET_OBJECTS:common>")
+else()
+  set(common_obj "")
+endif()
+
+add_library(precomputed OBJECT
+  precomputed_ecmult.c
+  precomputed_ecmult_gen.c
+)
+set(internal_obj "$<TARGET_OBJECTS:precomputed>" "${common_obj}")
+
+add_library(${PROJECT_NAME} SHARED EXCLUDE_FROM_ALL
+  secp256k1.c
+  ${internal_obj}
+)
+target_include_directories(${PROJECT_NAME} INTERFACE
+  $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>
+)
+target_compile_definitions(${PROJECT_NAME} PRIVATE
+  $<$<PLATFORM_ID:Windows>:DLL_EXPORT>
+)
+set_target_properties(${PROJECT_NAME} PROPERTIES
+  VERSION "${${PROJECT_NAME}_LIB_VERSION_CURRENT}.${${PROJECT_NAME}_LIB_VERSION_AGE}.${${PROJECT_NAME}_LIB_VERSION_REVISION}"
+  SOVERSION "${${PROJECT_NAME}_LIB_VERSION_CURRENT}"
+)
+if(SECP256K1_BUILD_SHARED)
+  get_target_property(use_pic ${PROJECT_NAME} POSITION_INDEPENDENT_CODE)
+  set_target_properties(precomputed PROPERTIES POSITION_INDEPENDENT_CODE ${use_pic})
+  set_target_properties(${PROJECT_NAME} PROPERTIES EXCLUDE_FROM_ALL FALSE)
+  list(APPEND ${PROJECT_NAME}_installables ${PROJECT_NAME})
+endif()
+
+add_library(${PROJECT_NAME}_static STATIC EXCLUDE_FROM_ALL
+  secp256k1.c
+  ${internal_obj}
+)
+target_include_directories(${PROJECT_NAME}_static INTERFACE
+  $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>
+)
+if(NOT MSVC)
+  set_target_properties(${PROJECT_NAME}_static PROPERTIES
+    OUTPUT_NAME ${PROJECT_NAME}
+  )
+endif()
+if(SECP256K1_BUILD_STATIC)
+  set_target_properties(${PROJECT_NAME}_static PROPERTIES EXCLUDE_FROM_ALL FALSE)
+  list(APPEND ${PROJECT_NAME}_installables ${PROJECT_NAME}_static)
+endif()
+
+add_library(binary_interface INTERFACE)
+target_compile_definitions(binary_interface INTERFACE
+  $<$<C_COMPILER_ID:MSVC>:_CRT_SECURE_NO_WARNINGS>
+)
+
+add_library(link_library INTERFACE)
+if(SECP256K1_BUILD_SHARED)
+  target_link_libraries(link_library INTERFACE ${PROJECT_NAME})
+elseif(SECP256K1_BUILD_STATIC)
+  target_link_libraries(link_library INTERFACE ${PROJECT_NAME}_static)
+endif()
+
+if(SECP256K1_BUILD_BENCHMARK)
+  add_executable(bench bench.c)
+  target_link_libraries(bench binary_interface link_library)
+  add_executable(bench_internal bench_internal.c ${internal_obj})
+  target_link_libraries(bench_internal binary_interface)
+  add_executable(bench_ecmult bench_ecmult.c ${internal_obj})
+  target_link_libraries(bench_ecmult binary_interface)
+endif()
+
+if(SECP256K1_BUILD_TESTS)
+  add_executable(noverify_tests tests.c ${internal_obj})
+  target_link_libraries(noverify_tests binary_interface)
+  add_test(noverify_tests noverify_tests)
+  if(NOT CMAKE_BUILD_TYPE STREQUAL "Coverage")
+    add_executable(tests tests.c ${internal_obj})
+    target_compile_definitions(tests PRIVATE VERIFY)
+    target_link_libraries(tests binary_interface)
+    add_test(tests tests)
+  endif()
+endif()
+
+if(SECP256K1_BUILD_EXHAUSTIVE_TESTS)
+  # Note: do not include $<TARGET_OBJECTS:precomputed> in exhaustive_tests (it uses runtime-generated tables).
+  add_executable(exhaustive_tests tests_exhaustive.c ${common_obj})
+  target_compile_definitions(exhaustive_tests PRIVATE $<$<NOT:$<CONFIG:Coverage>>:VERIFY>)
+  target_link_libraries(exhaustive_tests binary_interface)
+  add_test(exhaustive_tests exhaustive_tests)
+endif()
+
+if(SECP256K1_BUILD_CTIME_TESTS)
+  add_executable(ctime_tests ctime_tests.c)
+  target_link_libraries(ctime_tests binary_interface link_library)
+endif()
+
+install(TARGETS ${${PROJECT_NAME}_installables}
+  RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
+  LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
+  ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
+)
+set(${PROJECT_NAME}_headers
+  "${PROJECT_SOURCE_DIR}/include/secp256k1.h"
+  "${PROJECT_SOURCE_DIR}/include/secp256k1_preallocated.h"
+)
+if(SECP256K1_ENABLE_MODULE_ECDH)
+  list(APPEND ${PROJECT_NAME}_headers "${PROJECT_SOURCE_DIR}/include/secp256k1_ecdh.h")
+endif()
+if(SECP256K1_ENABLE_MODULE_RECOVERY)
+  list(APPEND ${PROJECT_NAME}_headers "${PROJECT_SOURCE_DIR}/include/secp256k1_recovery.h")
+endif()
+if(SECP256K1_ENABLE_MODULE_EXTRAKEYS)
+  list(APPEND ${PROJECT_NAME}_headers "${PROJECT_SOURCE_DIR}/include/secp256k1_extrakeys.h")
+endif()
+if(SECP256K1_ENABLE_MODULE_SCHNORRSIG)
+  list(APPEND ${PROJECT_NAME}_headers "${PROJECT_SOURCE_DIR}/include/secp256k1_schnorrsig.h")
+endif()
+install(FILES ${${PROJECT_NAME}_headers}
+  DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}
+)