From: Joel Rosdahl <joel@rosdahl.net>
Date: Sat, 31 Jan 2026 09:54:32 +0000 (+0100)
Subject: build: Disable legacy support for downloaded zstd
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=484bf0926e90338cc9eb57e980faf46efb7780e2;p=thirdparty%2Fccache.git

build: Disable legacy support for downloaded zstd

This avoids compiling zstd's lib/legacy/zstd_v01.c file which is seen to
trigger -Wmaybe-uninitialized warnings.

Closes #1679.
---

diff --git a/cmake/FindZstd.cmake b/cmake/FindZstd.cmake
index e3fc4eb2..9a7ffa78 100644
--- a/cmake/FindZstd.cmake
+++ b/cmake/FindZstd.cmake
@@ -39,6 +39,7 @@ if(_download_zstd)
   set(ZSTD_BUILD_SHARED OFF)
   set(ZSTD_BUILD_STATIC ON)
   set(ZSTD_BUILD_TESTS OFF)
+  set(ZSTD_LEGACY_SUPPORT OFF)
 
   include(FetchContent)
   FetchContent_Declare(
@@ -67,6 +68,7 @@ if(_download_zstd)
   unset(ZSTD_BUILD_SHARED)
   unset(ZSTD_BUILD_STATIC)
   unset(ZSTD_BUILD_TESTS)
+  unset(ZSTD_LEGACY_SUPPORT)
 
   set(_zstd_origin DOWNLOADED)
   add_library(dep_zstd ALIAS libzstd_static)