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[cmake] Allow using pre-existing zstd target if it exists (#2390)

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adds support for pre-existing `zstd::libzstd` which is useful for
projects that bundle their own zstd in a way that doesn't get caught by
`CONFIG`

Signed-off-by: crueter <crueter@eden-emu.dev>
This commit is contained in:
crueter
2026-03-30 21:26:20 -04:00
committed by GitHub
parent 831b64bdeb
commit 6607a6a592
1 changed files with 22 additions and 16 deletions
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34
CMakeLists.txt
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@@ -242,27 +242,33 @@ endif()
# zstd < 1.5.6 does not provide the CMake imported target `zstd::libzstd`. # zstd < 1.5.6 does not provide the CMake imported target `zstd::libzstd`.
# Older versions must be consumed via their pkg-config file. # Older versions must be consumed via their pkg-config file.
if(HTTPLIB_REQUIRE_ZSTD) if(HTTPLIB_REQUIRE_ZSTD)
find_package(zstd 1.5.6 CONFIG) if (NOT TARGET zstd::libzstd)
if(NOT zstd_FOUND) find_package(zstd 1.5.6 CONFIG)
find_package(PkgConfig REQUIRED) if(NOT zstd_FOUND)
pkg_check_modules(zstd REQUIRED IMPORTED_TARGET libzstd) find_package(PkgConfig REQUIRED)
add_library(zstd::libzstd ALIAS PkgConfig::zstd) pkg_check_modules(zstd REQUIRED IMPORTED_TARGET libzstd)
add_library(zstd::libzstd ALIAS PkgConfig::zstd)
endif()
endif() endif()
set(HTTPLIB_IS_USING_ZSTD TRUE) set(HTTPLIB_IS_USING_ZSTD TRUE)
elseif(HTTPLIB_USE_ZSTD_IF_AVAILABLE) elseif(HTTPLIB_USE_ZSTD_IF_AVAILABLE)
find_package(zstd 1.5.6 CONFIG QUIET) if (TARGET zstd::libzstd)
if(NOT zstd_FOUND) set(HTTPLIB_IS_USING_ZSTD TRUE)
find_package(PkgConfig QUIET) else()
if(PKG_CONFIG_FOUND) find_package(zstd 1.5.6 CONFIG QUIET)
pkg_check_modules(zstd QUIET IMPORTED_TARGET libzstd) if(NOT zstd_FOUND)
find_package(PkgConfig QUIET)
if(PKG_CONFIG_FOUND)
pkg_check_modules(zstd QUIET IMPORTED_TARGET libzstd)
if(TARGET PkgConfig::zstd) if(TARGET PkgConfig::zstd)
add_library(zstd::libzstd ALIAS PkgConfig::zstd) add_library(zstd::libzstd ALIAS PkgConfig::zstd)
endif()
endif() endif()
endif() endif()
# Both find_package and PkgConf set a XXX_FOUND var
set(HTTPLIB_IS_USING_ZSTD ${zstd_FOUND})
endif() endif()
# Both find_package and PkgConf set a XXX_FOUND var
set(HTTPLIB_IS_USING_ZSTD ${zstd_FOUND})
endif() endif()
# Used for default, common dirs that the end-user can change (if needed) # Used for default, common dirs that the end-user can change (if needed)