[openwrt/openwrt] elfutils: Ignore wrong use-after-free error

[LEDE Commits]

hauke pushed a commit to openwrt/openwrt.git, branch master:
https://git.openwrt.org/2748c45d468b6208f70972adc7ae2e532b2c3015

commit 2748c45d468b6208f70972adc7ae2e532b2c3015
Author: Hauke Mehrtens <hauke at hauke-m.de>
AuthorDate: Mon Dec 19 01:07:38 2022 +0100

    elfutils: Ignore wrong use-after-free error
    
    GCC 12.2.0 shows this false positive error message:
    ````
    In function 'bigger_buffer',
        inlined from '__libdw_gunzip' at gzip.c:374:12:
    gzip.c:96:9: error: pointer may be used after 'realloc' [-Werror=use-after-free]
       96 |     b = realloc (state->buffer, more -= 1024);
          |         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    gzip.c:94:13: note: call to 'realloc' here
       94 |   char *b = realloc (state->buffer, more);
          |             ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    cc1: all warnings being treated as errors
    ````
    
    GCC bug report: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104069
    
    Signed-off-by: Hauke Mehrtens <hauke at hauke-m.de>
---
 package/libs/elfutils/Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/package/libs/elfutils/Makefile b/package/libs/elfutils/Makefile
index d4e5d994e8..1e41e296b3 100644
--- a/package/libs/elfutils/Makefile
+++ b/package/libs/elfutils/Makefile
@@ -81,7 +81,7 @@ HOST_CONFIGURE_VARS += \
 CONFIGURE_VARS += \
 	ac_cv_search__obstack_free=yes
 
-TARGET_CFLAGS += -D_GNU_SOURCE -Wno-unused-result -Wno-format-nonliteral
+TARGET_CFLAGS += -D_GNU_SOURCE -Wno-unused-result -Wno-format-nonliteral -Wno-error=use-after-free
 
 define Build/InstallDev
 	$(INSTALL_DIR) $(1)/usr/include