git: f16349f12d8a - stable/15 - libsys/arm: include ARM EABI unwind bits into libsys

The branch stable/15 has been updated by fuz:

URL: https://cgit.FreeBSD.org/src/commit/?id=f16349f12d8aa63d771d259bae37d262212d8404

commit f16349f12d8aa63d771d259bae37d262212d8404
Author:     Jessica Clarke <jrtc27@FreeBSD.org>
AuthorDate: 2026-02-11 15:37:08 +0000
Commit:     Robert Clausecker <fuz@FreeBSD.org>
CommitDate: 2026-02-20 16:44:55 +0000

    libsys/arm: include ARM EABI unwind bits into libsys
    
    libsys required ARM EABI unwind symbols like __aeabi_unwind_cpp_pr0.
    These symbols are normally provided by libc, but if a binary does
    not link libc, the symbol ends up not being resolved.
    
    Among other problems, this prevented gcc14 and newer from building
    on arm.
    
    Add the relevant symbols as hidden symbols into libsys to avoid this
    problem.
    
    (this patch was posted by jrtc27 who has asked me to move it along)
    
    PR:             292539
    Tested by:      fuz, Mark Millard <marklmi26-fbsd@yahoo.com>
    Reviewed by:    mmel
    Approved by:    markj (mentor)
    MFC after:      1 week
    Differential Revision:  https://reviews.freebsd.org/D55255
    
    (cherry picked from commit 6265f30cd6b523d633efcc314f8952f24446861f)
---
 lib/libsys/arm/Makefile.sys | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/lib/libsys/arm/Makefile.sys b/lib/libsys/arm/Makefile.sys
index 424d2f9cc9d8..e8b420932031 100644
--- a/lib/libsys/arm/Makefile.sys
+++ b/lib/libsys/arm/Makefile.sys
@@ -6,3 +6,8 @@ SRCS+=	__vdso_gettc.c \
 MDASM= \
 	cerror.S \
 	vfork.S
+
+.if ${LIB} == "sys"
+.PATH: ${LIBSYS_SRCTOP}/../libc/arm/aeabi
+SRCS+=	aeabi_unwind_cpp.c
+.endif