https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70268
--- Comment #5 from rguenther at suse dot de <rguenther at suse dot de> --- On Thu, 17 Mar 2016, hongxu.jia at windriver dot com wrote: > https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70268 > > --- Comment #3 from hongxu jia <hongxu.jia at windriver dot com> --- > (In reply to Richard Biener from comment #2) > > IMHO it doesn't make sense to prune system header paths here and having > > them > > is desired. > > Hi Richard, > > It is just a simple example to explain the requirements. > > In our OpenEmbedded project, we do many cross complication, > and have very complex build path. > > Here is the actual use of option '-fdebug-prefix-map' in our project: > > DEBUG_FLAGS="-g -feliminate-unused-debug-types > -fdebug-prefix-map=/buildarea/raid0/hjia/build-20160316-yocto-buildpath-2/tmp/work/core2-64-poky-linux/service/0.1-r0/service-0.1=/usr/src/service > -fdebug-prefix-map=/buildarea/raid0/hjia/build-20160316-yocto-buildpath-2/tmp/work/core2-64-poky-linux/service/0.1-r0/service-0.1=/usr/src/service > -fdebug-prefix-map=/buildarea/raid0/hjia/build-20160316-yocto-buildpath-2/tmp/sysroots/x86_64-linux= > -fdebug-prefix-map=/buildarea/raid0/hjia/build-20160316-yocto-buildpath-2/tmp/sysroots/qemux86-64= > " I see. Care to propose a patch then?