commit 0dde64eef849027d16a0ac83b15bc8789d678564
Author: Jerry James <loganjerry@gmail.com>
Date:   Tue Dec 6 13:19:35 2022 -0700

    Fix cmake error when building with jack on Linux

diff --git a/build/cmake/FindJack.cmake b/build/cmake/FindJack.cmake
index 6713e3aeef..d1676fa82b 100644
--- a/build/cmake/FindJack.cmake
+++ b/build/cmake/FindJack.cmake
@@ -28,6 +28,7 @@ IF(BUILD_JACK)
            set (JACK_LIB "$ENV{${progenv}}/Jack/lib/libjack.a")
            MESSAGE("JACK support enabled.")
      ELSE(MINGW OR MSVC)
+           include(UsePkgConfig1)
            PKGCONFIG1 (jack ${JACK_MIN_VERSION} JACK_INCDIR JACK_LIBDIR JACK_LIB JACK_CPP)
            IF(JACK_INCDIR)
                  MESSAGE(STATUS "${JACK_LONGNAME} >= ${JACK_MIN_VERSION} found. jack support enabled.")