Re: [Bug sim/28302] New: [11 Regression] gdb fails to build with glibc 2.34 (

[Stafford Horne <shorne@gmail.com>]

I ran into this failure today, there is a discussion about the reason
behind glibc making this change.

https://public-inbox.org/libc-alpha/87y2ew8i1w.fsf@igel.home/T/

It's kind of hacky but this patch worked as a fix for me.

diff --git a/sim/common/gentmap.c b/sim/common/gentmap.c
index 9f30e66e378..f690193f471 100644
--- a/sim/common/gentmap.c
+++ b/sim/common/gentmap.c
@@ -83,6 +83,14 @@ gen_targ_map_c (void)
   printf ("#include \"targ-vals.h\"\n");
   printf ("\n");

+  /* Make SIGSTKSZ a constant again.  */
+  printf ("#ifdef __USE_SC_SIGSTKSZ\n");
+  printf ("# undef SIGSTKSZ\n");
+  printf ("# define SIGSTKSZ 8192\n");
+  printf ("#endif\n");
+
+  printf ("\n");
+
   printf ("/* syscall mapping table */\n");
   printf ("CB_TARGET_DEFS_MAP cb_init_syscall_map[] = {\n");
   for (t = &sys_tdefs[0]; t->symbol; ++t)

On Fri, Sep 3, 2021 at 4:18 PM doko at debian dot org via Gdb-prs
<gdb-prs@sourceware.org> wrote:
>
> https://sourceware.org/bugzilla/show_bug.cgi?id=28302
>
>             Bug ID: 28302
>            Summary: [11 Regression] gdb fails to build with glibc 2.34 (
>            Product: gdb
>            Version: 11.1
>             Status: NEW
>           Severity: normal
>           Priority: P2
>          Component: sim
>           Assignee: unassigned at sourceware dot org
>           Reporter: doko at debian dot org
>                 CC: vapier at gentoo dot org
>   Target Milestone: ---
>
> gdb fails to build on the gdb-11 branch with glibc-2.34, in the sim directory,
> at least on arm-linux-gnueabihf and aarch64-linux-gnu:
>
> In file included from /usr/include/signal.h:328,
>                  from ../../gnulib/import/signal.h:52,
>                  from targ-map.c:7:
> targ-map.c:412:17: error: initializer element is not constant
>   412 |   { "SIGSTKSZ", SIGSTKSZ, TARGET_SIGSTKSZ },
>       |                 ^~~~~~~~
> targ-map.c:412:17: note: (near initialization for
> ‘cb_init_signal_map[18].host_val’)
> make[5]: *** [Makefile:522: targ-map.o] Error 1
> make[5]: Leaving directory '/<<PKGBUILDDIR>>/build/default/sim/aarch64'
> make[4]: *** [Makefile:1271: all-recursive] Error 1
> make[4]: Leaving directory '/<<PKGBUILDDIR>>/build/default/sim'
> make[3]: *** [Makefile:898: all] Error 2
> make[3]: Leaving directory '/<<PKGBUILDDIR>>/build/default/sim'
> make[2]: *** [Makefile:8030: all-sim] Error 2
>
> configured with
>
> --build=aarch64-linux-gnu --host=aarch64-linux-gnu --prefix=/usr
> --libexecdir="\${prefix}/lib/gdb" --disable-werror --disable-maintainer-mode
> --disable-dependency-tracking --disable-silent-rules --disable-gdbtk
> --disable-shared --with-system-readline --with-expat --with-system-zlib
> --without-guile --with-debuginfod  --with-babeltrace --enable-tui --with-lzma
> --with-python=python3 --with-xxhash --with-mpfr
>
> --
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