cmake HAVE_STRCHRNUL examples

gammu/gammu CMakeLists.txt :91 

check_function_exists (strchrnul HAVE_STRCHRNUL)

chdb-io/chdb contrib/postgres-cmake/CMakeLists.txt :87 

target_compile_definitions(_libpq PRIVATE -DHAVE_STRCHRNUL)

ClickHouse/ClickHouse contrib/postgres-cmake/CMakeLists.txt :86 

target_compile_definitions(_libpq PRIVATE -DHAVE_STRCHRNUL)

MobilityDB/MobilityDB CMakeLists.txt :240 

check_symbol_exists(strchrnul "string.h" HAVE_STRCHRNUL)