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/20260409085102.3475867-1-stli@linux.ibm.com/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 <fweimer@redhat.com>

diff --git a/sysdeps/s390/Makefile b/sysdeps/s390/Makefile
index 29d11dfdab5325a6b619f14f4e8d08a6f851bf26..85446ca0b33792c4f3d3227c6132da9aedb55a29 100644 (file)
--- 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 \