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tools: m4: set -std=gnu17

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

Its been reported upstream [2], so until its fixed lets simply set C
language version back to GNU17.

[1] https://gcc.gnu.org/gcc-15/porting_to.html#c23
[2] https://savannah.gnu.org/support/?111150

Link: https://github.com/openwrt/openwrt/pull/18505
(cherry picked from commit 8c141e53d7)
Link: https://github.com/openwrt/openwrt/pull/18581
Signed-off-by: Robert Marko <robimarko@gmail.com>
Link: https://github.com/openwrt/openwrt/pull/19065
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
This commit is contained in:
Robert Marko 2025-04-16 11:42:54 +02:00 • committed by Hauke Mehrtens
parent fe5e590b46
commit b0d7794a95
1 changed files with 1 additions and 0 deletions
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tools/m4/Makefile
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@ -19,6 +19,7 @@ HOST_BUILD_PARALLEL:=1
include $(INCLUDE_DIR)/host-build.mk
HOST_CFLAGS += -std=gnu17
HOST_CONFIGURE_VARS += gl_cv_func_strstr_linear=no
define Host/Uninstall