[openwrt/openwrt] tools/cmake: fix compilation with host libzstd-dev

[LEDE Commits]

ansuel pushed a commit to openwrt/openwrt.git, branch master:
https://git.openwrt.org/0e3d51ccaedff49477f12205062a3cb0c49a96e8

commit 0e3d51ccaedff49477f12205062a3cb0c49a96e8
Author: Rosen Penev <rosenp at gmail.com>
AuthorDate: Fri Sep 30 01:42:51 2022 -0700

    tools/cmake: fix compilation with host libzstd-dev
    
    cmake's find_package looks at host paths first for some reason. Switch
    to using pkgconfig for the search, matching other modules.
    
    Fixes: 3848cf458ef9 ("tools/cmake: Build without some included libs")
    Signed-off-by: Rosen Penev <rosenp at gmail.com>
---
 tools/cmake/patches/150-zstd-libarchive.patch | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/tools/cmake/patches/150-zstd-libarchive.patch b/tools/cmake/patches/150-zstd-libarchive.patch
new file mode 100644
index 0000000000..603ac03775
--- /dev/null
+++ b/tools/cmake/patches/150-zstd-libarchive.patch
@@ -0,0 +1,18 @@
+--- a/Utilities/cmlibarchive/CMakeLists.txt
++++ b/Utilities/cmlibarchive/CMakeLists.txt
+@@ -630,8 +630,13 @@ IF(ENABLE_ZSTD)
+     SET(ZSTD_FIND_QUIETLY TRUE)
+   ENDIF (ZSTD_INCLUDE_DIR)
+ 
+-  FIND_PATH(ZSTD_INCLUDE_DIR zstd.h)
+-  FIND_LIBRARY(ZSTD_LIBRARY NAMES zstd libzstd)
++  IF(UNIX)
++  FIND_PACKAGE(PkgConfig QUIET)
++  PKG_SEARCH_MODULE(PC_ZSTD libzstd)
++  ENDIF()
++
++  FIND_PATH(ZSTD_INCLUDE_DIR zstd.h HINTS ${PC_ZSTD_INCLUDEDIR} ${PC_ZSTD_INCLUDE_DIRS})
++  FIND_LIBRARY(ZSTD_LIBRARY NAMES zstd HINTS ${PC_ZSTD_LIBDIR} ${PC_ZSTD_LIBRARY_DIRS})
+   INCLUDE(FindPackageHandleStandardArgs)
+   FIND_PACKAGE_HANDLE_STANDARD_ARGS(ZSTD DEFAULT_MSG ZSTD_LIBRARY ZSTD_INCLUDE_DIR)
+ ELSE(ENABLE_ZSTD)