cmake HAVE_LSEEK examples

glKarin/com.n0n3m4.diii4a Q3E/src/main/jni/deplibs/libsndfile/cmake/SndFileChecks.cmake :158 

check_function_exists (lseek      		HAVE_LSEEK)

OSGeo/grass cmake/modules/Configure.cmake :141 

check_symbol_exists(lseek "unistd.h" HAVE_LSEEK)