+include(CheckIncludeFile)
+CHECK_INCLUDE_FILE(byteswap.h HAVE_BYTESWAP_H)
+CHECK_INCLUDE_FILE(sys/endian.h HAVE_SYS_ENDIAN_H)
+if(HAVE_BYTESWAP_H)
+ target_compile_definitions(nominatim PRIVATE HAVE_BYTESWAP_H)
+endif(HAVE_BYTESWAP_H)
+if(HAVE_SYS_ENDIAN_H)
+ target_compile_definitions(nominatim PRIVATE HAVE_SYS_ENDIAN_H)
+endif(HAVE_SYS_ENDIAN_H)