On 20 October 2015 at 13:27, John Baldwin <j...@freebsd.org> wrote: > > If '-gdwarf-4' works then you can just set that in the DEBUG makeoptions as a > test, otherwise try hacking kern.mk to disable this bit: > > # > # Add -gdwarf-2 when compiling -g. The default starting in clang v3.4 > # and gcc 4.8 is to generate DWARF version 4. However, our tools don't > # cope well with DWARF 4, so force it to genereate DWARF2, which they > # understand. Do this unconditionally as it is harmless when not needed, > # but critical for these newer versions. > # > .if ${CFLAGS:M-g} != "" && ${CFLAGS:M-gdwarf*} == "" > CFLAGS+= -gdwarf-2 > .endif
Note that Clang defaults to DWARF 2 on FreeBSD, so removing the override in kern.mk isn't sufficient. >From contrib/llvm/tools/clang/lib/Driver/Tools.cpp: else if (!A->getOption().matches(options::OPT_g0) && !A->getOption().matches(options::OPT_ggdb0)) { // Default is dwarf-2 for Darwin, OpenBSD, FreeBSD and Solaris. const llvm::Triple &Triple = getToolChain().getTriple(); if (Triple.isOSDarwin() || Triple.getOS() == llvm::Triple::OpenBSD || Triple.getOS() == llvm::Triple::FreeBSD || Triple.getOS() == llvm::Triple::Solaris) CmdArgs.push_back("-gdwarf-2"); else CmdArgs.push_back("-g"); } It may be time for us to remove this default from Clang. _______________________________________________ freebsd-toolchain@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-toolchain To unsubscribe, send any mail to "freebsd-toolchain-unsubscr...@freebsd.org"