port.h is included by global.h

src/builtin.cmod

src/language.yacc

src/modules/Mysql/mysql.c

src/modules/Mysql/result.c

src/modules/_Image_TIFF/image_tiff.c

src/modules/_Stdio/buffer.cmod

src/modules/sybase/sybase.c

src/modules/system/nt.c

src/post_modules/GSSAPI/gssapi.cmod

src/stralloc.c