Edit
kc3-lang/libevent/cmake/FindMbedTLS.cmake
Branch :
-
Show log
Commit
-
Author :
Ingo Bauersachs
Date : 2022-12-01 18:39:52
Hash : acfac7ae
Message : Make dependency paths relocatable The generated configurations for both CMake and pkg-config included absolute paths to dependencies (OpenSSL, MbedTLS). This is contrary to the general CMake advise to create relocatable packages [1]. Additionally, when building both mbedtls and libevent via CMake's FetchContent in the same project, loading the project would fail with INTERFACE_INCLUDE_DIRECTORIES property contains path: "/home/user/project/cmake-build/_deps/mbedtls-build/include" which is prefixed in the source directory. The required changes include: - Adding the outer includes only to the BUILD_INTERFACE solves the makes the CMake paths relocatable and thus solves the FetchContent problem. - Updates to libevent_*.pc.in fixes the relocatable issues for pkg-config and properly declares currently missing dependencies. - Using components for linking to OpenSSL (requiring CMake 3.4) and MbedTLS. The new MbedTLS target names now match the component names of the MbedTLS' CMake project. - Use the Threads CMake library reference instead of a direct reference to support both built-in pthread and -lpthread. v2 (azat): get back CMAKE_REQUIRED_LIBRARIES [1] https://cmake.org/cmake/help/v3.25/manual/cmake-packages.7.html#creating-relocatable-packages
- cmake/FindMbedTLS.cmake
-
# Copyright 2017-2019 AVSystem <avsystem@avsystem.com> # # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. #.rst: # FindMbedTLS # ----------- # # Find the mbedTLS encryption library. # # Imported Targets # ^^^^^^^^^^^^^^^^ # # This module defines the following :prop_tgt:`IMPORTED` targets: # # ``mbedtls`` # The mbedTLS ``mbedtls`` library, if found. # ``mbedcrypto`` # The mbedtls ``crypto`` library, if found. # ``mbedx509`` # The mbedtls ``x509`` library, if found. # # Result Variables # ^^^^^^^^^^^^^^^^ # # This module will set the following variables in your project: # # ``MBEDTLS_FOUND`` # System has the mbedTLS library. # ``MBEDTLS_INCLUDE_DIR`` # The mbedTLS include directory. # ``MBEDTLS_LIBRARY`` # The mbedTLS SSL library. # ``MBEDTLS_CRYPTO_LIBRARY`` # The mbedTLS crypto library. # ``MBEDTLS_X509_LIBRARY`` # The mbedTLS x509 library. # ``MBEDTLS_LIBRARIES`` # All mbedTLS libraries. # ``MBEDTLS_VERSION`` # This is set to ``$major.$minor.$patch``. # ``MBEDTLS_VERSION_MAJOR`` # Set to major mbedTLS version number. # ``MBEDTLS_VERSION_MINOR`` # Set to minor mbedTLS version number. # ``MBEDTLS_VERSION_PATCH`` # Set to patch mbedTLS version number. # # Hints # ^^^^^ # # Set ``MBEDTLS_ROOT_DIR`` to the root directory of an mbedTLS installation. # Set ``MBEDTLS_USE_STATIC_LIBS`` to ``TRUE`` to look for static libraries. if(MBEDTLS_ROOT_DIR) # Disable re-rooting paths in find_path/find_library. # This assumes MBEDTLS_ROOT_DIR is an absolute path. set(_EXTRA_FIND_ARGS "NO_CMAKE_FIND_ROOT_PATH") endif() find_path(MBEDTLS_INCLUDE_DIR NAMES mbedtls/ssl.h PATH_SUFFIXES include HINTS ${MBEDTLS_ROOT_DIR} ${_EXTRA_FIND_ARGS}) # based on https://github.com/ARMmbed/mbedtls/issues/298 function(mbedtls_get_version_numbers FILE) file(STRINGS "${MBEDTLS_INCLUDE_DIR}/${FILE}" VERSION_STRING_LINE REGEX "^#define MBEDTLS_VERSION_STRING[ \\t\\n\\r]+\"[^\"]*\"$") file(STRINGS "${MBEDTLS_INCLUDE_DIR}/${FILE}" VERSION_MAJOR_LINE REGEX "^#define MBEDTLS_VERSION_MAJOR[ \\t\\n\\r]+[0-9]+$") file(STRINGS "${MBEDTLS_INCLUDE_DIR}/${FILE}" VERSION_MINOR_LINE REGEX "^#define MBEDTLS_VERSION_MINOR[ \\t\\n\\r]+[0-9]+$") file(STRINGS "${MBEDTLS_INCLUDE_DIR}/${FILE}" VERSION_PATCH_LINE REGEX "^#define MBEDTLS_VERSION_PATCH[ \\t\\n\\r]+[0-9]+$") string(REGEX REPLACE "^#define MBEDTLS_VERSION_STRING[ \\t\\n\\r]+\"([^\"]*)\"$" "\\1" MBEDTLS_VERSION "${VERSION_STRING_LINE}") string(REGEX REPLACE "^#define MBEDTLS_VERSION_MAJOR[ \\t\\n\\r]+([0-9]+)$" "\\1" MBEDTLS_VERSION_MAJOR "${VERSION_MAJOR_LINE}") string(REGEX REPLACE "^#define MBEDTLS_VERSION_MINOR[ \\t\\n\\r]+([0-9]+)$" "\\1" MBEDTLS_VERSION_MINOR "${VERSION_MINOR_LINE}") string(REGEX REPLACE "^#define MBEDTLS_VERSION_PATCH[ \\t\\n\\r]+([0-9]+)$" "\\1" MBEDTLS_VERSION_PATCH "${VERSION_PATCH_LINE}") set(MBEDTLS_VERSION "${MBEDTLS_VERSION}" PARENT_SCOPE) set(MBEDTLS_VERSION_MAJOR "${MBEDTLS_VERSION_MAJOR}" PARENT_SCOPE) set(MBEDTLS_VERSION_MINOR "${MBEDTLS_VERSION_MINOR}" PARENT_SCOPE) set(MBEDTLS_VERSION_PATCH "${MBEDTLS_VERSION_PATCH}" PARENT_SCOPE) endfunction() if(MBEDTLS_INCLUDE_DIR AND EXISTS "${MBEDTLS_INCLUDE_DIR}/mbedtls/version.h") mbedtls_get_version_numbers("mbedtls/version.h") if ("${MBEDTLS_VERSION}" STREQUAL "") mbedtls_get_version_numbers("mbedtls/build_info.h") endif() endif() if(MBEDTLS_USE_STATIC_LIBS) set(_MBEDTLS_LIB_NAME libmbedtls.a) set(_MBEDTLS_CRYPTO_LIB_NAME libmbedcrypto.a) set(_MBEDTLS_X509_LIB_NAME libmbedx509.a) else() set(_MBEDTLS_LIB_NAME mbedtls) set(_MBEDTLS_CRYPTO_LIB_NAME mbedcrypto) set(_MBEDTLS_X509_LIB_NAME mbedx509) endif() # lib - standard path suffix # library - is the suffix that is used in build tree find_library(MBEDTLS_LIBRARY NAMES ${_MBEDTLS_LIB_NAME} PATH_SUFFIXES lib library HINTS ${MBEDTLS_ROOT_DIR} ${_EXTRA_FIND_ARGS}) find_library(MBEDTLS_CRYPTO_LIBRARY NAMES ${_MBEDTLS_CRYPTO_LIB_NAME} PATH_SUFFIXES lib library HINTS ${MBEDTLS_ROOT_DIR} ${_EXTRA_FIND_ARGS}) find_library(MBEDTLS_X509_LIBRARY NAMES ${_MBEDTLS_X509_LIB_NAME} PATH_SUFFIXES lib library HINTS ${MBEDTLS_ROOT_DIR} ${_EXTRA_FIND_ARGS}) set(MBEDTLS_LIBRARIES ${MBEDTLS_LIBRARY} ${MBEDTLS_CRYPTO_LIBRARY} ${MBEDTLS_X509_LIBRARY}) if(MBEDTLS_INCLUDE_DIR) set(MBEDTLS_FOUND TRUE) endif() include(FindPackageHandleStandardArgs) find_package_handle_standard_args(MbedTLS FOUND_VAR MBEDTLS_FOUND REQUIRED_VARS MBEDTLS_INCLUDE_DIR MBEDTLS_LIBRARY MBEDTLS_CRYPTO_LIBRARY MBEDTLS_X509_LIBRARY MBEDTLS_LIBRARIES MBEDTLS_VERSION VERSION_VAR MBEDTLS_VERSION) if(NOT TARGET MbedTLS::mbedtls) add_library(MbedTLS::mbedtls UNKNOWN IMPORTED) set_target_properties(MbedTLS::mbedtls PROPERTIES INTERFACE_INCLUDE_DIRECTORIES "${MBEDTLS_INCLUDE_DIR}" IMPORTED_LINK_INTERFACE_LANGUAGES "C" INTERFACE_LINK_LIBRARIES MbedTLS::mbedx509 IMPORTED_LOCATION "${MBEDTLS_LIBRARY}") endif() if(NOT TARGET MbedTLS::mbedcrypto) add_library(MbedTLS::mbedcrypto UNKNOWN IMPORTED) set_target_properties(MbedTLS::mbedcrypto PROPERTIES IMPORTED_LINK_INTERFACE_LANGUAGES "C" IMPORTED_LOCATION "${MBEDTLS_CRYPTO_LIBRARY}") endif() if(NOT TARGET MbedTLS::mbedx509) add_library(MbedTLS::mbedx509 UNKNOWN IMPORTED) set_target_properties(MbedTLS::mbedx509 PROPERTIES IMPORTED_LINK_INTERFACE_LANGUAGES "C" INTERFACE_LINK_LIBRARIES MbedTLS::mbedcrypto IMPORTED_LOCATION "${MBEDTLS_X509_LIBRARY}") endif()