On Mon, Jun 10, 2019 at 10:32:25AM +0100, Ignat Korchagin wrote: > Hi Greg, > > For us it seems applying the following 4 mainline patches makes 4.19.x > branch perf compile with GCC-9: > > 4d0f16d059ddb91424480d88473f7392f24aebdc: perf ui helpline: Use > strlcpy() as a shorter form of strncpy() + explicit set nul > b6313899f4ed2e76b8375cf8069556f5b94fbff0: perf help: Remove needless > use of strncpy() > 5192bde7d98c99f2cd80225649e3c2e7493722f7: perf header: Fix unchecked > usage of strncpy() > 97acec7df172cd1e450f81f5e293c0aa145a2797: perf data: Fix 'strncat may > truncate' build failure with recent gcc > > I also checked that 4.19.49 compiles fine with GCC 9, although with a > lot of warnings, mostly from objtool, like "warning: objtool: > sock_register()+0xd: sibling call from callable instruction with > modified stack frame". But it's a start. > > Can we apply the above-mentioned patches, please? I'll look into these after the next round of kernels are released. I guess I'll go find a distro that has gcc9 on it to actually test things... thanks, greg k-h
