+CHECK_SYMBOL_EXISTS(bswap_32 "byteswap.h" HAVE_BYTESWAP)
+CHECK_SYMBOL_EXISTS(bswap32 "sys/endian.h" HAVE_SYS_ENDIAN)
+
+target_compile_definitions(nominatim
+ PRIVATE HAVE_BYTESWAP=$<BOOL:${HAVE_BYTESWAP}>
+ PRIVATE HAVE_SYS_ENDIAN=$<BOOL:${HAVE_SYS_ENDIAN}>
+)
+