```cmake
# - Try to find LibCheck
# Once done this will define
#  LIBCHECK_FOUND - System has LibCheck
#  LIBCHECK_INCLUDE_DIRS - The LibCheck include directories
#  LIBCHECK_LIBRARIES - The libraries needed to use LibCheck
#  LIBCHECK_DEFINITIONS - Compiler switches required for using LibCheck

FIND_PACKAGE(PkgConfig)
PKG_CHECK_MODULES(PC_CHECK QUIET libcheck)
SET(LIBCHECK_DEFINITIONS ${PC_LIBCHECK_CFLAGS_OTHER})

FIND_PATH(LIBCHECK_INCLUDE_DIR check.h
	  HINTS ${PC_LIBCHECK_INCLUDEDIR} ${PC_LIBCHECK_INCLUDE_DIRS})

FIND_LIBRARY(LIBCHECK_LIBRARY NAMES check libcheck
	     HINTS ${PC_LIBCHECK_LIBDIR} ${PC_LIBCHECK_LIBRARY_DIRS})

SET(LIBCHECK_LIBRARIES ${LIBCHECK_LIBRARY})
SET(LIBCHECK_INCLUDE_DIRS ${LIBCHECK_INCLUDE_DIR})

INCLUDE(FindPackageHandleStandardArgs)
# handle the QUIETLY and REQUIRED arguments and set LIBCHECK_FOUND to TRUE
# if all listed variables are TRUE
FIND_PACKAGE_HANDLE_STANDARD_ARGS(LibCheck DEFAULT_MSG
				  LIBCHECK_LIBRARY LIBCHECK_INCLUDE_DIR)

MARK_AS_ADVANCED(LIBCHECK_INCLUDE_DIR LIBCHECK_LIBRARY)
```

Handle unusual (old?) FindPkgConfig package in CMake
user
```cmake
# - Try to find LibCheck
# Once done this will define
#  LIBCHECK_FOUND - System has LibCheck
#  LIBCHECK_INCLUDE_DIRS - The LibCheck include directories
#  LIBCHECK_LIBRARIES - The libraries needed to use LibCheck
#  LIBCHECK_DEFINITIONS - Compiler switches required for using LibCheck

FIND_PACKAGE(PkgConfig)
PKG_CHECK_MODULES(PC_CHECK libcheck)
SET(LIBCHECK_DEFINITIONS ${PC_LIBCHECK_CFLAGS_OTHER})

FIND_PATH(LIBCHECK_INCLUDE_DIR check.h
	  HINTS ${PC_LIBCHECK_INCLUDEDIR} ${PC_LIBCHECK_INCLUDE_DIRS})

FIND_LIBRARY(LIBCHECK_LIBRARY NAMES check libcheck
	     HINTS ${PC_LIBCHECK_LIBDIR} ${PC_LIBCHECK_LIBRARY_DIRS})

SET(LIBCHECK_LIBRARIES ${LIBCHECK_LIBRARY})
SET(LIBCHECK_INCLUDE_DIRS ${LIBCHECK_INCLUDE_DIR})

INCLUDE(FindPackageHandleStandardArgs)
# handle the QUIETLY and REQUIRED arguments and set LIBCHECK_FOUND to TRUE
# if all listed variables are TRUE
FIND_PACKAGE_HANDLE_STANDARD_ARGS(LibCheck DEFAULT_MSG
				  LIBCHECK_LIBRARY LIBCHECK_INCLUDE_DIR)

MARK_AS_ADVANCED(LIBCHECK_INCLUDE_DIR LIBCHECK_LIBRARY)
```
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