[glibc] arm: Order the rtld link after libgcc-stubs.a

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=a33ceb6e96dc8de8d36de1b1f3ec06ceb524d012

commit a33ceb6e96dc8de8d36de1b1f3ec06ceb524d012
Author: Adhemerval Zanella <[email protected]>
Date:   Thu Aug 6 14:08:00 2026 -0300

    arm: Order the rtld link after libgcc-stubs.a
    
    The librtld.map and librtld.os link recipes use $(gnulib), which on arm
    contains libgcc-stubs.a through gnulib-arch.  But the archive is only a
    prerequisite of lib-noranlib so the rtld link can run before the archive
    exists:
    
      ld.bfd: cannot find .../elf/libgcc-stubs.a: No such file or directory
    
    The race seems to predates the parallel subdirectory recursion, which
    only made it observable.
    
    Add the order-only dependency in sysdeps/arm/Makefile rather than in
    elf/Makefile.  Theprerequisite lists expand when the rule is parsed,
    and gnulib-arch is only defined once Makerules includes the sysdeps
    makefiles.
    
    Verified with a build for arm-linux-gnueabihf.
    Reviewed-by: Sam James <[email protected]>

Diff:
---
 sysdeps/arm/Makefile | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/sysdeps/arm/Makefile b/sysdeps/arm/Makefile
index 0bb1b6e05b..9042315492 100644
--- a/sysdeps/arm/Makefile
+++ b/sysdeps/arm/Makefile
@@ -10,6 +10,11 @@ shared-only-routines += aeabi_unwind_cpp_pr1
 $(objpfx)libgcc-stubs.a: $(objpfx)aeabi_unwind_cpp_pr1.os
 	$(build-extra-lib)
 
+# The rtld link recipes in elf/Makefile use $(gnulib), which here
+# includes libgcc-stubs.a, but they cannot name it as a prerequisite:
+# gnulib-arch is only defined once this file is included from Makerules.
+$(objpfx)librtld.map $(objpfx)librtld.os: | $(objpfx)libgcc-stubs.a
+
 lib-noranlib: $(objpfx)libgcc-stubs.a
 
 ifeq ($(build-shared),yes)