From 190be0667cf1f7b39bed2c96760f08a6295b652b Mon Sep 17 00:00:00 2001
From: Justin W Smith <103147162+justsmth@users.noreply.github.com>
Date: Wed, 22 Jan 2025 07:55:20 -0500
Subject: [PATCH] Only need libunwind for testing (#2131)

### Notice
This change does not modify the FIPS module boundary. This change only
avoids having CMake check for the availability of `Libunwind` when no
tests are being built.

### Description of changes:
* Libunwind is only needed when building tests.
* See same change made for main: https://github.com/aws/aws-lc/pull/2093

By submitting this pull request, I confirm that my contribution is made
under the terms of the Apache 2.0 license and the ISC license.
---
 CMakeLists.txt | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index a35fd05c2f..1090cd53e6 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -141,7 +141,7 @@ if(NOT DISABLE_PERL)
   find_package(Perl REQUIRED)
 endif()
 
-if("${CMAKE_SYSTEM_NAME}" STREQUAL "Linux" AND NOT CMAKE_CROSSCOMPILING)
+if("${CMAKE_SYSTEM_NAME}" STREQUAL "Linux" AND BUILD_TESTING AND NOT CMAKE_CROSSCOMPILING)
   find_package(PkgConfig QUIET)
   if (PkgConfig_FOUND)
     pkg_check_modules(LIBUNWIND libunwind-generic)