Re: [rfc] a few kern.mk and bsd.sys.mk related changes
On Sat, May 28, 2011 at 06:23:26PM +, Alexander Best wrote: > > well i'm not an expert on this. but are we 100% sure that a kernel on amd64 > compiled with -O2 frename-registers can be debugged the same way as one with > -O? if that is the case: sure...-O2 is fine. ;) > > however i've often read messages - mostly by bruce evans - claiming that > anything greater than -O will in fact decrease a kernel's ability to be > debugged just as well as a kernel with -O. > The critical option when -O2 is used is -fno-omit-frame-pointers, since removing frame pointers makes debugging impossible (on i386). With -O2 code is moved around and removed, so debugging is more difficult, but can still provide useful information. -- Bruce Cran ___ freebsd-toolchain@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-toolchain To unsubscribe, send any mail to "freebsd-toolchain-unsubscr...@freebsd.org"
WITH_CLANG_IS_CC and unrecognized command line options
I've done a fresh install of FreeBSD 9.0, upgraded to 10-CURRENT and have just tried doing a rebuild with CLANG_IS_CC=yes in src.conf. However there's an error building ncurses: cc: unrecognized option '-Qunused-arguments' cc: unrecognized option '-Qunused-arguments' cc1: error: unrecognized command line option "-Wno-empty-body" cc1: error: unrecognized command line option "-Wno-string-plus-int" cc1: error: unrecognized command line option "-Wno-tautological-compare" cc1: error: unrecognized command line option "-Wno-parentheses-equality" cc1: error: unrecognized command line option "-Wno-empty-body" cc1: error: unrecognized command line option "-Wno-string-plus-int" cc1: error: unrecognized command line option "-Wno-tautological-compare" cc1: error: unrecognized command line option "-Wno-parentheses-equality" *** [make_hash] Error code 1 *** [make_keys] Error code 1 Is there some configuration I've missed? -- Bruce Cran ___ freebsd-toolchain@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-toolchain To unsubscribe, send any mail to "freebsd-toolchain-unsubscr...@freebsd.org"
