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8fce3e17e6
After limiting `find_package()`/`find_dependency()` calls to curl local Find modules via the `MODULES` keyword, it became possible to detect dependencies via CMake Configs from within those local Find modules, by calling `find_package()` again with the `CONFIG` keyword. This patch implements this. Then maps detection results to the result variables and curl-specific imported targets the rest of the build expects. Also honor recently introduced `*_USE_STATIC_LIBS` (experimental) flags to map to the static target when requested. This adds CMake Configs as an alternative to the existing `pkg-config` and `find_path()`/`find_library()` auto-detection methods. Enabled by default for MSVC, outside vcpkg and when not cross-building. To enable for other cases, or override the default, you can use `-DCURL_USE_CMAKECONFIG=ON` or `OFF`. When enabled, Config detection happens after `pkg-config` and before `find_path()`/`find_library()`. Using CMake's built-in options, you may also manually point to the absolute directory holding Config files: `Libssh2_DIR`, `MbedTLS_DIR`, `NGHTTP2_DIR`, `NGHTTP3_DIR`, `NGTCP2_DIR` v1.19.0+ (with non-fork OpenSSL only), `Zstd_DIR` v1.4.5+ E.g. `-DMbedTLS_DIR=/path/to/mbedtls/lib/cmake/MbedTLS` These dependencies typically need to be built with CMake to support this. Tagged as experimental. Refs: #20013 #19156 #19117 https://github.com/curl/curl/pull/20784#issuecomment-3984318492 Depends-on:fad1ebaecc#20840 Follow-up to91e06fde1b#20784 Follow-up to26c39d8df1#20015 Closes #20814
118 lines
4.2 KiB
CMake
118 lines
4.2 KiB
CMake
#***************************************************************************
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# _ _ ____ _
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# Project ___| | | | _ \| |
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# / __| | | | |_) | |
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# | (__| |_| | _ <| |___
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# \___|\___/|_| \_\_____|
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#
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# Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
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#
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# This software is licensed as described in the file COPYING, which
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# you should have received as part of this distribution. The terms
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# are also available at https://curl.se/docs/copyright.html.
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#
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# You may opt to use, copy, modify, merge, publish, distribute and/or sell
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# copies of the Software, and permit persons to whom the Software is
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# furnished to do so, under the terms of the COPYING file.
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#
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# This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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# KIND, either express or implied.
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#
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# SPDX-License-Identifier: curl
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#
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###########################################################################
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# Find the libssh2 library
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#
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# Input variables:
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#
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# - `LIBSSH2_INCLUDE_DIR`: Absolute path to libssh2 include directory.
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# - `LIBSSH2_LIBRARY`: Absolute path to `libssh2` library.
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# - `LIBSSH2_USE_STATIC_LIBS`: Configure for static libssh2 libraries.
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#
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# Defines:
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#
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# - `LIBSSH2_FOUND`: System has libssh2.
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# - `LIBSSH2_VERSION`: Version of libssh2.
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# - `CURL::libssh2`: libssh2 library target.
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set(_libssh2_pc_requires "libssh2")
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if(NOT DEFINED LIBSSH2_INCLUDE_DIR AND
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NOT DEFINED LIBSSH2_LIBRARY)
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if(CURL_USE_PKGCONFIG)
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find_package(PkgConfig QUIET)
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pkg_check_modules(_libssh2 ${_libssh2_pc_requires})
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endif()
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if(NOT _libssh2_FOUND AND CURL_USE_CMAKECONFIG)
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find_package(libssh2 CONFIG QUIET)
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endif()
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endif()
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if(_libssh2_FOUND AND _libssh2_INCLUDE_DIRS)
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set(Libssh2_FOUND TRUE)
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set(LIBSSH2_FOUND TRUE)
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set(LIBSSH2_VERSION ${_libssh2_VERSION})
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if(LIBSSH2_USE_STATIC_LIBS)
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set(_libssh2_CFLAGS "${_libssh2_STATIC_CFLAGS}")
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set(_libssh2_INCLUDE_DIRS "${_libssh2_STATIC_INCLUDE_DIRS}")
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set(_libssh2_LIBRARY_DIRS "${_libssh2_STATIC_LIBRARY_DIRS}")
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set(_libssh2_LIBRARIES "${_libssh2_STATIC_LIBRARIES}")
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endif()
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message(STATUS "Found Libssh2 (via pkg-config): ${_libssh2_INCLUDE_DIRS} (found version \"${LIBSSH2_VERSION}\")")
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elseif(libssh2_CONFIG)
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set(Libssh2_FOUND TRUE)
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set(LIBSSH2_FOUND TRUE)
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set(LIBSSH2_VERSION ${libssh2_VERSION})
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if(LIBSSH2_USE_STATIC_LIBS)
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set(_libssh2_LIBRARIES libssh2::libssh2_static)
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else()
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set(_libssh2_LIBRARIES libssh2::libssh2)
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endif()
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message(STATUS "Found Libssh2 (via CMake Config): ${libssh2_CONFIG} (found version \"${LIBSSH2_VERSION}\")")
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else()
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find_path(LIBSSH2_INCLUDE_DIR NAMES "libssh2.h")
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if(LIBSSH2_USE_STATIC_LIBS)
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find_library(LIBSSH2_LIBRARY NAMES "ssh2_static" "libssh2_static" "ssh2" "libssh2")
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else()
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find_library(LIBSSH2_LIBRARY NAMES "ssh2" "libssh2")
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endif()
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unset(LIBSSH2_VERSION CACHE)
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if(LIBSSH2_INCLUDE_DIR AND EXISTS "${LIBSSH2_INCLUDE_DIR}/libssh2.h")
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set(_version_regex "#[\t ]*define[\t ]+LIBSSH2_VERSION[\t ]+\"([^\"]*)\"")
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file(STRINGS "${LIBSSH2_INCLUDE_DIR}/libssh2.h" _version_str REGEX "${_version_regex}")
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string(REGEX REPLACE "${_version_regex}" "\\1" _version_str "${_version_str}")
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set(LIBSSH2_VERSION "${_version_str}")
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unset(_version_regex)
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unset(_version_str)
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endif()
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include(FindPackageHandleStandardArgs)
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find_package_handle_standard_args(Libssh2
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REQUIRED_VARS
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LIBSSH2_INCLUDE_DIR
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LIBSSH2_LIBRARY
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VERSION_VAR
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LIBSSH2_VERSION
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)
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if(LIBSSH2_FOUND)
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set(_libssh2_INCLUDE_DIRS ${LIBSSH2_INCLUDE_DIR})
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set(_libssh2_LIBRARIES ${LIBSSH2_LIBRARY})
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endif()
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mark_as_advanced(LIBSSH2_INCLUDE_DIR LIBSSH2_LIBRARY)
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endif()
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if(LIBSSH2_FOUND)
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if(NOT TARGET CURL::libssh2)
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add_library(CURL::libssh2 INTERFACE IMPORTED)
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set_target_properties(CURL::libssh2 PROPERTIES
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INTERFACE_LIBCURL_PC_MODULES "${_libssh2_pc_requires}"
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INTERFACE_COMPILE_OPTIONS "${_libssh2_CFLAGS}"
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INTERFACE_INCLUDE_DIRECTORIES "${_libssh2_INCLUDE_DIRS}"
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INTERFACE_LINK_DIRECTORIES "${_libssh2_LIBRARY_DIRS}"
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INTERFACE_LINK_LIBRARIES "${_libssh2_LIBRARIES}")
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endif()
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endif()
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