OPTIONAL_COMPONENTS never worked quite right with Qt5 when REQUIRED was also
passed to find_package(). If an optional component is not found, it results
in an error.

--- CMakeLists.txt.orig	2026-05-31 11:09:35 UTC
+++ CMakeLists.txt
@@ -82,10 +82,12 @@ if(QUAZIP_QT_MAJOR_VERSION EQUAL 6)
     set(QUAZIP_QT_ZLIB_HEADER_COMPONENT ZlibPrivate)
     set(QUAZIP_LIB_LIBRARIES Qt6::Core )
     set(QUAZIP_TEST_QT_LIBRARIES Qt6::Core Qt6::Network Qt6::Test)
-    set(QUAZIP_PKGCONFIG_REQUIRES "zlib, Qt6Core")
+    set(QUAZIP_PKGCONFIG_REQUIRES "zlib, Qt6Core, Qt6Core5Compat")
 elseif(QUAZIP_QT_MAJOR_VERSION EQUAL 5)
-    find_package(Qt5 REQUIRED COMPONENTS Core
-            OPTIONAL_COMPONENTS Network Test)
+    find_package(Qt5 REQUIRED COMPONENTS Core)
+  if(QUAZIP_ENABLE_TESTS)
+    find_package(Qt5 REQUIRED COMPONENTS Network Test)
+  endif()
     message(STATUS "Found Qt version ${Qt5_VERSION} at ${Qt5_DIR}")
     set(QUAZIP_QT_ZLIB_COMPONENT Zlib)
     set(QUAZIP_LIB_LIBRARIES Qt5::Core)