tools: elfutils: set -std=gnu17

Fedora 42 updated to GCC15 which now defaults to GNU23 as the default
instead of GNU17[1], and this breaks m4 compilation.

This looks like a gnulib issue, so until that is updated/fixed
lets simply set C language version back to GNU17.

[1] https://gcc.gnu.org/gcc-15/porting_to.html#c23

Link: https://github.com/openwrt/openwrt/pull/18506
(cherry picked from commit f165dd2f78f7aaafa85f59f5c35264dd03e3a6ce)
Link: https://github.com/openwrt/openwrt/pull/18581
Signed-off-by: Robert Marko <robimarko@gmail.com>
[Rework patch to make it apply]
(cherry picked from commit 1e51fd037d780725ca31cc92b39078468a383295)
Link: https://github.com/openwrt/openwrt/pull/19065
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>

diff --git a/tools/elfutils/Makefile b/tools/elfutils/Makefile
index f9c6272719c89094a347ee20a7fe9d3cfe75a455..105be07720c19846f7e07f7dde6a2ba48339bd04 100644 (file)
--- a/tools/elfutils/Makefile
+++ b/tools/elfutils/Makefile
@@ -19,6 +19,8 @@ PKG_INSTALL:=1
 
 include $(INCLUDE_DIR)/host-build.mk
 
+HOST_CFLAGS +=-std=gnu17
+
 HOST_CONFIGURE_ARGS += \
        --disable-debuginfod \
        --disable-libdebuginfod \