From affb84375d93411e7e10b341d6f68bc2954977d9 Mon Sep 17 00:00:00 2001
From: Tim Kientzle <kientzle@acm.org>
Date: Thu, 19 Jun 2025 08:20:43 -0700
Subject: [PATCH] Merge pull request #2676 from danyeaw/fix-pkgconf-path

Fix .pc location when CMAKE_INSTALL_LIBDIR not set

(cherry picked from commit 6a252c84a283789af4bf060b5d750840472dbdb2)
---
 CMakeLists.txt            | 3 +++
 libarchive/CMakeLists.txt | 4 ----
 2 files changed, 3 insertions(+), 4 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 4c1f8770e..44a802f95 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -3,6 +3,9 @@ cmake_minimum_required(VERSION 3.17 FATAL_ERROR)
 
 PROJECT(libarchive C)
 #
+# Include standard installation directories
+include(GNUInstallDirs)
+#
 SET(CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/build/cmake")
 if(NOT CMAKE_RUNTIME_OUTPUT_DIRECTORY)
   set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${libarchive_BINARY_DIR}/bin)
diff --git a/libarchive/CMakeLists.txt b/libarchive/CMakeLists.txt
index fd997db41..82523a6f8 100644
--- a/libarchive/CMakeLists.txt
+++ b/libarchive/CMakeLists.txt
@@ -266,10 +266,6 @@ IF(NOT WIN32 OR CYGWIN OR NOT BUILD_SHARED_LIBS)
   SET_TARGET_PROPERTIES(archive_static PROPERTIES OUTPUT_NAME archive)
 ENDIF(NOT WIN32 OR CYGWIN OR NOT BUILD_SHARED_LIBS)
 
-if(NOT DEFINED CMAKE_INSTALL_LIBDIR)
-    set(CMAKE_INSTALL_LIBDIR "lib")
-endif()
-
 IF(ENABLE_INSTALL)
   # How to install the libraries
   IF(BUILD_SHARED_LIBS)
-- 
2.47.3