Box Backup

Recent Cygwin versions of MinGW now define O_BINARY as well, also in fcntl.h, so include it if we can find it, and only define O_BINARY if it turns out to be missing.

Recent Cygwin versions of MinGW now define O_BINARY as well, also in fcntl.h, so include it if we can find it, and only define O_BINARY if it turns out to be missing.

Recent Cygwin versions of MinGW now define O_BINARY as well, also in fcntl.h, so include it if we can find it, and only define O_BINARY if it turns out to be missing.

Recent Cygwin versions of MinGW now define O_BINARY as well, also in fcntl.h, so include it if we can find it, and only define O_BINARY if it turns out to be missing.

Only advertise -E option if readline support is built in.

Only advertise -E option if readline support is built in.

Silence warnings from new MinGW headers that expect MINGW_FEATURES to be defined. Check for fcntl.h and include it if we have it, not just on MSVC, now that MinGW also defines O_BINARY in newer versions.

Silence warnings from new MinGW headers that expect MINGW_FEATURES to be defined. Check for fcntl.h and include it if we have it, not just on MSVC, now that MinGW also defines O_BINARY in newer versions.

Rephrase -rdynamic message.

Rephrase -rdynamic message.