On Thu, Apr 7, 2022 at 6:13 PM Sergei Trofimovich via Gcc-patches <gcc-patches@gcc.gnu.org> wrote: > > From: Sergei Trofimovich <siarh...@google.com> > > In --without-headers mode gcc fails to bootstrap on libgcc as: > > /build/build/./gcc/xgcc -B/build/build/./gcc/ ... -Dinhibit_libc -c > fde-glibc.c > ../../../gcc-12-20220403/libgcc/config/ia64/fde-glibc.c:33:10: > fatal error: stdlib.h: No such file or directory > > Most other linux targets are able to build the --without-headers > compiler without additional effort. This change adds IA64 to the fold. > > The change drops part of the code that relies on DYNAMIC glibc > section traversal for backtraces. > > Tested bootstrap of ia64-unknown-linux-gnu with and without libc > headers present.
OK. Thanks, Richard. > libgcc/ > * config/ia64/fde-glibc.c: Make a no-op in inhibit_libc mode. > --- > libgcc/config/ia64/fde-glibc.c | 2 ++ > 1 file changed, 2 insertions(+) > > diff --git a/libgcc/config/ia64/fde-glibc.c b/libgcc/config/ia64/fde-glibc.c > index 9caac2bca24..bd74847fa85 100644 > --- a/libgcc/config/ia64/fde-glibc.c > +++ b/libgcc/config/ia64/fde-glibc.c > @@ -22,20 +22,21 @@ > see the files COPYING3 and COPYING.RUNTIME respectively. If not, see > <http://www.gnu.org/licenses/>. */ > > /* Locate the FDE entry for a given address, using glibc ld.so routines > to avoid register/deregister calls at DSO load/unload. */ > > #ifndef _GNU_SOURCE > #define _GNU_SOURCE 1 > #endif > #include "config.h" > +#ifndef inhibit_libc > #include <stddef.h> > #include <stdlib.h> > #include <link.h> > #include "unwind-ia64.h" > > #if __GLIBC__ < 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ < 2) \ > || (__GLIBC__ == 2 && __GLIBC_MINOR__ == 2 && !defined(DT_CONFIG)) > # error You need GLIBC 2.2.4 or later on IA-64 Linux > #endif > > @@ -152,10 +153,11 @@ _Unwind_FindTableEntry (void *pc, unw_word > *segment_base, unw_word *gp, > data.pc = (Elf64_Addr) pc; > data.segment_base = segment_base; > data.gp = gp; > data.ret = NULL; > > if (dl_iterate_phdr (_Unwind_IteratePhdrCallback, &data) < 0) > return NULL; > > return data.ret; > } > +#endif > -- > 2.35.1 >
