* CMakeLists.txt: Include 'FindPkgConfig' module. Older cmake versions don't provide `pkg_check_modules` by default. Fixes #1126.
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 4590309..8cb7783 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -122,6 +122,7 @@ endif ()
include(CheckIncludeFile)
include(CMakeDependentOption)
+include(FindPkgConfig)
# CMAKE_TOOLCHAIN_FILE must be set before `project' is called, which
# configures the base build environment and references the toolchain file