From 4e9deee11a9ed1f7c62a3c671bf7910b0f9faf09 Mon Sep 17 00:00:00 2001
From: Kyle Huey <khuey@kylehuey.com>
Date: Wed, 26 Jun 2024 11:16:29 -0700
Subject: [PATCH] [llvm-config] Make llvm-config --system-libs obey
 LLVM_USE_STATIC_ZSTD (#93754)

LLVM's build system does the right thing but LLVM_SYSTEM_LIBS ends up
containing the shared library. Emit the static library instead when
appropriate.

With LLVM_USE_STATIC_ZSTD, before:

khuey@zhadum:~/dev/llvm-project/build$ ./bin/llvm-config --system-libs
-lrt -ldl -lm -lz -lzstd -lxml2

after:

khuey@zhadum:~/dev/llvm-project/build$ ./bin/llvm-config --system-libs
-lrt -ldl -lm -lz /usr/local/lib/libzstd.a -lxml2

(cherry-picked from 0f24a462386409c1d907aefb9d8a58481cb71933)
---
 llvm/lib/Support/CMakeLists.txt | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/llvm/lib/Support/CMakeLists.txt b/llvm/lib/Support/CMakeLists.txt
index e19223fdef4f1..7311071b287e9 100644
--- a/llvm/lib/Support/CMakeLists.txt
+++ b/llvm/lib/Support/CMakeLists.txt
@@ -318,8 +318,12 @@ if(LLVM_ENABLE_ZSTD)
   if(NOT zstd_library)
     get_property(zstd_library TARGET ${zstd_target} PROPERTY LOCATION)
   endif()
-  get_library_name(${zstd_library} zstd_library)
-  set(llvm_system_libs ${llvm_system_libs} "${zstd_library}")
+  if (zstd_target STREQUAL zstd::libzstd_shared)
+    get_library_name(${zstd_library} zstd_library)
+    set(llvm_system_libs ${llvm_system_libs} "${zstd_library}")
+  else()
+    set(llvm_system_libs ${llvm_system_libs} "${zstd_STATIC_LIBRARY}")
+  endif()
 endif()
 
 if(LLVM_ENABLE_TERMINFO)