cmake HAVE_PBUFFERS examples

OSGeo/grass cmake/modules/CheckDependentLibraries.cmake :257

try_compile(
    HAVE_PBUFFERS ${CMAKE_CURRENT_BINARY_DIR}
    ${CMAKE_SOURCE_DIR}/cmake/tests/have_pbuffer.c
    CMAKE_FLAGS "-DINCLUDE_DIRECTORIES:PATH=${OPENGL_INCLUDE_DIR}" "-w"
                "-DLINK_LIBRARIES:STRING=${OPENGL_LIBRARIES}"
    OUTPUT_VARIABLE COMPILE_HAVE_PBUFFERS)

OSGeo/grass cmake/modules/CheckDependentLibraries.cmake :264

message(
      FATAL_ERROR
        "Performing Test HAVE_PBUFFERS - Failed\n COMPILE_OUTPUT:${COMPILE_HAVE_PBUFFERS}\n"
    )

OSGeo/grass cmake/modules/CheckDependentLibraries.cmake :269

message(STATUS "Performing Test HAVE_PBUFFERS - Success")