-gcc_extensions

Equivalent to the -gccext option.

Syntax
  -gcc[_extensions] on | off
Related information
-char
-defaults
-encoding
-flag
-gccext
-M
-make
-mapcr
-MM
-MD
-MMD
-msext
-once
-pragma
-relax_pointers
-requireprotos
-search
-trigraphs