I followed the manual Define a common option like that: common-instr Common Var(common_instr_flag) Init(0) Outputing common instrumentation code Then I use the flag if(common_instr_flag) in sparc.c to enable my code. When I use gcc -common-instr=1, I just got unrecognized option '-common-instr=1' Then I tried to modify c-opts.c , function c_common_handle_option To handle the case OPT_common-instr. And I tried gcc -common-instr, same error " unrecognized option '-common-instr " What else should I do to use the option? -----Original Message----- From: gcc-help-owner@xxxxxxxxxxx [mailto:gcc-help-owner@xxxxxxxxxxx] On Behalf Of David Daney Sent: Thursday, October 02, 2008 3:34 PM To: ORC_developer Cc: gcc-help@xxxxxxxxxxx Subject: Re: How to add a new option to gcc ORC_developer wrote: > I wonder if there is any document about adding a new architecture-related > option to gcc? > I'm porting gcc to a new arch > It is generally done by modifying the gcc/config/arch/arch.opt file. http://gcc.gnu.org/onlinedocs/gccint/Options.html David Daney
