• GNUC 1
• gcc-attribute 3
• gcc-builtin 2
• gcc-options 2
• link post 1

GNUC

• NULL != 0

gcc-attribute

• gcc attribute: format, format_arg
• gcc attribute: nonnull
• gcc attribute: cleanup

gcc-builtin

• gcc builtin: choose_expr
• gcc builtin: alloca

gcc-options

• gcc options: -Wformat
• gcc options: -fsigned-char

link post

• gcc release notes link