[glibc] s390: Remove Wno-CFLAGS for rtld.c/dl-load.c/dl-reloc.c

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=79a7d01c9e91cd00f0acdd8d93b2ed852c70ae1f

commit 79a7d01c9e91cd00f0acdd8d93b2ed852c70ae1f
Author: Stefan Liebler <[email protected]>
Date:   Tue Apr 21 14:50:15 2026 +0200

    s390: Remove Wno-CFLAGS for rtld.c/dl-load.c/dl-reloc.c
    
    While review of s390-32 removal, Adhemerval asked if those CFLAGS are still
    necessary:
    https://inbox.sourceware.org/libc-alpha/[email protected]/T/#me5120906445f3941031e29c3a093f1699eae77b4
    
    According to the git-history, the first s390-Makefile was introduced back in
    2000-08-02 with those CFLAGS.  The same are also included now and past in
    i386-Makefile.  But I haven't found a reason why those were added in the past
    and if it was really necessary on s390.  I assume it was with old GCCs most
    likely due to inclusion of dl-machine.h.
    
    This patch removes those CFLAGS. If needed, we have to circumvent the issues
    again.  At least I've used current GCCs 12.5, 13.4, 14.3, 15.2 and gcc-head
    to successfully build current glibc on s390-64 with -O2, -O3 and -Os without
    such warnings.
    Reviewed-by: Florian Weimer <[email protected]>

Diff:
---
 sysdeps/s390/Makefile | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/sysdeps/s390/Makefile b/sysdeps/s390/Makefile
index 29d11dfdab..85446ca0b3 100644
--- a/sysdeps/s390/Makefile
+++ b/sysdeps/s390/Makefile
@@ -47,10 +47,6 @@ $(modpfx)gconv-modules-s390.conf: ../sysdeps/s390/gconv-modules-s390.conf \
 endif
 
 ifeq ($(subdir),elf)
-CFLAGS-rtld.c += -Wno-uninitialized -Wno-unused
-CFLAGS-dl-load.c += -Wno-unused
-CFLAGS-dl-reloc.c += -Wno-unused
-
 $(objpfx)tst-glibc-hwcaps: \
   $(objpfx)libmarkermod2-1.so \
   $(objpfx)libmarkermod3-1.so \