curl/CMake/FindZstd.cmake
Viktor Szakats 26c39d8df1
cmke: add *_USE_STATIC_LIBS options for 9 dependencies
Via options:

- `BROTLI_USE_STATIC_LIBS`
- `CARES_USE_STATIC_LIBS`
- `LIBSSH_USE_STATIC_LIBS`
- `LIBSSH2_USE_STATIC_LIBS`
- `MBEDTLS_USE_STATIC_LIBS`
- `NGHTTP2_USE_STATIC_LIBS`
- `NGHTTP3_USE_STATIC_LIBS`
- `NGTCP2_USE_STATIC_LIBS`
- `ZSTD_USE_STATIC_LIBS`

When enabled, make a "best effort" finding static libs first and set
the "build static" macro (on Windows) as required by the dependency.

When doing `pkg-config`-based detections, make curl select the static
configuration, which shall set the "build static" macro also.

These options resemble CMake's `OPENSSL_USE_STATIC_LIBS` and
`ZLIB_USE_STATIC_LIBS` (the latter does not support `pkg-config` as of
CMake v4.2.2).

Shared/static library selection based on loose filename conventions is
fragile and prone to break if the non-static-suffixed library is found
and happens to be a shared library, or, if the linker decides to pick up
a shared copy (e.g. `.a.dll`) that shadows the static one. It may help
to provide either static or shared, but not both, on the disk, and match
that with this setting.

Experimental.

Ref: #20013
Closes #20015
2026-01-26 05:21:24 +01:00

127 lines
4.6 KiB
CMake

#***************************************************************************
# _ _ ____ _
# Project ___| | | | _ \| |
# / __| | | | |_) | |
# | (__| |_| | _ <| |___
# \___|\___/|_| \_\_____|
#
# Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
#
# This software is licensed as described in the file COPYING, which
# you should have received as part of this distribution. The terms
# are also available at https://curl.se/docs/copyright.html.
#
# You may opt to use, copy, modify, merge, publish, distribute and/or sell
# copies of the Software, and permit persons to whom the Software is
# furnished to do so, under the terms of the COPYING file.
#
# This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
# KIND, either express or implied.
#
# SPDX-License-Identifier: curl
#
###########################################################################
# Find the zstd library
#
# Input variables:
#
# - `ZSTD_INCLUDE_DIR`: Absolute path to zstd include directory.
# - `ZSTD_LIBRARY`: Absolute path to `zstd` library.
# - `ZSTD_USE_STATIC_LIBS`: Configure for static zstd libraries.
#
# Defines:
#
# - `ZSTD_FOUND`: System has zstd.
# - `ZSTD_VERSION`: Version of zstd.
# - `CURL::zstd`: zstd library target.
if(DEFINED Zstd_INCLUDE_DIR AND NOT DEFINED ZSTD_INCLUDE_DIR)
message(WARNING "Zstd_INCLUDE_DIR is deprecated, use ZSTD_INCLUDE_DIR instead.")
set(ZSTD_INCLUDE_DIR "${Zstd_INCLUDE_DIR}")
endif()
if(DEFINED Zstd_LIBRARY AND NOT DEFINED ZSTD_LIBRARY)
message(WARNING "Zstd_LIBRARY is deprecated, use ZSTD_LIBRARY instead.")
set(ZSTD_LIBRARY "${Zstd_LIBRARY}")
endif()
set(_zstd_pc_requires "libzstd")
if(CURL_USE_PKGCONFIG AND
NOT DEFINED ZSTD_INCLUDE_DIR AND
NOT DEFINED ZSTD_LIBRARY)
find_package(PkgConfig QUIET)
pkg_check_modules(_zstd ${_zstd_pc_requires})
endif()
if(_zstd_FOUND)
set(Zstd_FOUND TRUE)
set(ZSTD_FOUND TRUE)
set(ZSTD_VERSION ${_zstd_VERSION})
if(ZSTD_USE_STATIC_LIBS)
set(_zstd_CFLAGS "${_zstd_STATIC_CFLAGS}")
set(_zstd_INCLUDE_DIRS "${_zstd_STATIC_INCLUDE_DIRS}")
set(_zstd_LIBRARY_DIRS "${_zstd_STATIC_LIBRARY_DIRS}")
set(_zstd_LIBRARIES "${_zstd_STATIC_LIBRARIES}")
endif()
message(STATUS "Found Zstd (via pkg-config): ${_zstd_INCLUDE_DIRS} (found version \"${ZSTD_VERSION}\")")
else()
find_path(ZSTD_INCLUDE_DIR NAMES "zstd.h")
if(ZSTD_USE_STATIC_LIBS)
find_library(ZSTD_LIBRARY NAMES "zstd_static" "zstd")
else()
find_library(ZSTD_LIBRARY NAMES "zstd")
endif()
unset(ZSTD_VERSION CACHE)
if(ZSTD_INCLUDE_DIR AND EXISTS "${ZSTD_INCLUDE_DIR}/zstd.h")
set(_version_regex1 "#[\t ]*define[ \t]+ZSTD_VERSION_MAJOR[ \t]+([0-9]+).*")
set(_version_regex2 "#[\t ]*define[ \t]+ZSTD_VERSION_MINOR[ \t]+([0-9]+).*")
set(_version_regex3 "#[\t ]*define[ \t]+ZSTD_VERSION_RELEASE[ \t]+([0-9]+).*")
file(STRINGS "${ZSTD_INCLUDE_DIR}/zstd.h" _version_str1 REGEX "${_version_regex1}")
file(STRINGS "${ZSTD_INCLUDE_DIR}/zstd.h" _version_str2 REGEX "${_version_regex2}")
file(STRINGS "${ZSTD_INCLUDE_DIR}/zstd.h" _version_str3 REGEX "${_version_regex3}")
string(REGEX REPLACE "${_version_regex1}" "\\1" _version_str1 "${_version_str1}")
string(REGEX REPLACE "${_version_regex2}" "\\1" _version_str2 "${_version_str2}")
string(REGEX REPLACE "${_version_regex3}" "\\1" _version_str3 "${_version_str3}")
set(ZSTD_VERSION "${_version_str1}.${_version_str2}.${_version_str3}")
unset(_version_regex1)
unset(_version_regex2)
unset(_version_regex3)
unset(_version_str1)
unset(_version_str2)
unset(_version_str3)
endif()
include(FindPackageHandleStandardArgs)
find_package_handle_standard_args(Zstd
REQUIRED_VARS
ZSTD_INCLUDE_DIR
ZSTD_LIBRARY
VERSION_VAR
ZSTD_VERSION
)
if(ZSTD_FOUND)
set(_zstd_INCLUDE_DIRS ${ZSTD_INCLUDE_DIR})
set(_zstd_LIBRARIES ${ZSTD_LIBRARY})
endif()
mark_as_advanced(ZSTD_INCLUDE_DIR ZSTD_LIBRARY)
endif()
if(ZSTD_FOUND)
if(CMAKE_VERSION VERSION_LESS 3.13)
link_directories(${_zstd_LIBRARY_DIRS})
endif()
if(NOT TARGET CURL::zstd)
add_library(CURL::zstd INTERFACE IMPORTED)
set_target_properties(CURL::zstd PROPERTIES
INTERFACE_LIBCURL_PC_MODULES "${_zstd_pc_requires}"
INTERFACE_COMPILE_OPTIONS "${_zstd_CFLAGS}"
INTERFACE_INCLUDE_DIRECTORIES "${_zstd_INCLUDE_DIRS}"
INTERFACE_LINK_DIRECTORIES "${_zstd_LIBRARY_DIRS}"
INTERFACE_LINK_LIBRARIES "${_zstd_LIBRARIES}")
endif()
endif()