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From: "emaste at freebsd dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug driver/114839] New: g++-linked FreeBSD static binaries abort
 upon exception
Date: Wed, 24 Apr 2024 17:50:31 +0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: new
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X-Bugzilla-Product: gcc
X-Bugzilla-Component: driver
X-Bugzilla-Version: 13.2.0
X-Bugzilla-Keywords: 
X-Bugzilla-Severity: normal
X-Bugzilla-Who: emaste at freebsd dot org
X-Bugzilla-Status: UNCONFIRMED
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X-Bugzilla-Priority: P3
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D114839

            Bug ID: 114839
           Summary: g++-linked FreeBSD static binaries abort upon
                    exception
           Product: gcc
           Version: 13.2.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: driver
          Assignee: unassigned at gcc dot gnu.org
          Reporter: emaste at freebsd dot org
  Target Milestone: ---

When compiling and statically linking a binary on FreeBSD with GCC the EH_F=
RAME
segment is omitted, and then libgcc's exception unwinder aborts when it can=
not
find the EH_FRAME segment. See FreeBSD bug report
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D278551 for full details=
 and
history.

>From -dumpspecs it looks like (assuming I understand correctly) that
--eh-frame-header is not passed when static is specified:

...
*link:
%{!static|static-pie:--eh-frame-hdr}   %{m32:-m elf_i386_fbsd}%{!m32:-m
elf_x86_64_fbsd}   %{p:%nconsider using '-pg' instead of '-p' with gprof(1)=
}=20=20
%{v:-V}   %{assert*} %{R*} %{rpath*} %{defsym*}   %{shared:-Bshareable %{h*}
%{soname*}}     %{!shared:       %{!static:         %{rdynamic:-export-dyna=
mic}
    -dynamic-linker %(fbsd_dynamic_linker) }     %{static:-Bstatic}}=20=20
%{symbolic:-Bsymbolic}=