--- CMakeLists.txt.orig	2026-10-07 07:39:22 UTC
+++ CMakeLists.txt
@@ -180,9 +180,12 @@ configure_file(${DEFINES_HXX_CMAKE} ${DEFINES_HXX} @ON
 
 configure_file(${DEFINES_HXX_CMAKE} ${DEFINES_HXX} @ONLY)
 
+if(NOT DEFINED CATCH2_INCLUDE_DIR)
+  set(CATCH2_INCLUDE_DIR ${log4cplus_SOURCE_DIR}/catch/single_include/catch2)
+endif()
 include_directories (${log4cplus_SOURCE_DIR}/include
                      ${log4cplus_SOURCE_DIR}/threadpool
-                     ${log4cplus_SOURCE_DIR}/catch/single_include/catch2
+                     ${CATCH2_INCLUDE_DIR}
                      ${log4cplus_BINARY_DIR}/include
                     )
 
@@ -243,7 +246,7 @@ else ()
 if (IS_ABSOLUTE "${CMAKE_INSTALL_LIBDIR}")
   set(log4cplus_pc_install_dir "${CMAKE_INSTALL_PREFIX}/libdata/pkgconfig")
 else ()
-  set(log4cplus_pc_install_dir "\${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_PREFIX}/libdata/pkgconfig")
+  set(log4cplus_pc_install_dir "\${CMAKE_INSTALL_PREFIX}/libdata/pkgconfig")
 endif ()
 install(CODE "configure_file(\"${log4cplus_pc}\"
   \"\$ENV{DESTDIR}${log4cplus_pc_install_dir}/log4cplus.pc\" COPYONLY)")