When trying to build host-dtc on a host with glibc 2.43, the build fails
on the following error:
libfdt/fdt_overlay.c: In function ‘overlay_fixup_phandle’:
libfdt/fdt_overlay.c:424:21: error: assignment discards ‘const’
qualifier from pointer target type [-Werror=discarded-qualifiers]
424 | sep = memchr(fixup_str, ':', fixup_len);
| ^
libfdt/fdt_overlay.c:434:21: error: assignment discards ‘const’
qualifier from pointer target type [-Werror=discarded-qualifiers]
434 | sep = memchr(name, ':', fixup_len);
| ^
fdtput.c: In function ‘create_node’:
fdtput.c:235:11: error: assignment discards ‘const’ qualifier from
pointer target type [-Werror=discarded-qualifiers]
235 | p = strrchr(node_name, '/');
| ^
cc1: all warnings being treated as errors
make[2]: *** [Makefile:359: fdtput.o] Error 1
make[2]: *** Waiting for unfinished jobs....
cc1: all warnings being treated as errors
make[2]: *** [Makefile:359: libfdt/fdt_overlay.o] Error 1
make[1]: *** [package/pkg-generic.mk:273:
/home/alexis/src/buildroot/dtc/build/host-dtc-1.7.2/.stamp_built] Error 2
make: *** [Makefile:83: _all] Error 2
The issue can be reproduced on master with this minimal defconfig on a
host having glibc 2.43:
BR2_x86_64=y
BR2_TOOLCHAIN_EXTERNAL=y
BR2_PACKAGE_QORIQ_MC_UTILS=y
(QORIQ_MC_UTILS will pull HOST_DTC)
This error is due to some functions prototype update in glibc 2.43 for
ISO C23 (see [1], point 3 in the NEWS list). The corresponding fix has
already been integrated upstream, but it has not been released since
then.
Bring the corresponding upstream patch to allow host-dtc to build on
affected hosts.
[1] https://lists.gnu.org/archive/html/info-gnu/2026-01/msg00005.html
Signed-off-by: Alexis Lothoré <alexis.lothore@bootlin.com>
Signed-off-by: Julien Olivain <ju.o@free.fr>
Alexis Lothoré
3b52fe6f2e