-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)
+
+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}>
+)
+