Date: Tue, 13 Feb 2018 15:33:10 +0100 From: Szabolcs Nagy <nsz@...t70.net> To: musl@...ts.openwall.com Subject: Re: shmctl not found when compiling compiler-rt * Matúš Olekšák <oleksak.matus@...il.com> [2018-02-13 15:30:45 +0100]: > Try this patch to correctly link compiler-rt. > why would a linker flag change fix a compile time issue? > 2018-02-13 15:15 GMT+01:00 Szabolcs Nagy <nsz@...t70.net>: > > > * Dmitry Golovin <dima@...ovin.in> [2018-02-13 15:34:34 +0200]: > > > I'm trying to compile compiler-rt with musl and it used to be fine, but > > I can't succeed with recent versions of compiler-rt. > > > > > > The compilation fails because of the lack of real_shmctl while musl > > clearly has shmctl: http://git.musl-libc.org/cgit/ > > musl/tree/src/ipc/shmctl.c > > > > > > Here is the complete output: > > > > > > llvm/projects/compiler-rt/lib/msan/msan_interceptors.cc:1446:15: > > error: no member named 'real_shmctl' in namespace '__interception'; did you > > mean 'real_ioctl'? > > > int res = REAL(shmctl)(shmid, shmctl_ipc_stat, &ds); > > > ^~~~~~~~~~~~ > > > > there should be a > > > > DECLARE_REAL(int, shmctl, int shmid, int cmd, void *buf) > > > > in that file which defines __interception::real_shmctl. > > > > > To compile without glibc on linux using this patch: > > > https://github.com/tpimh/ngtc/blob/alpine/patch/compiler-rt- > > 01-sanitizer-nongnu.patch > > > > > > Regards, > > > Dmitry > >
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