With clang 21 graphics/drm-66-kmod fails to compile, with errors similar to: In file included from /wrkdirs/usr/ports/graphics/drm-66-kmod/work/drm-kmod-drm_v6.6.25_9/drivers/gpu/drm/i915/i915_active.c:12: /wrkdirs/usr/ports/graphics/drm-66-kmod/work/drm-kmod-drm_v6.6.25_9/drivers/gpu/drm/i915/gt/intel_ring.h:63:2: error: default initialization of an object of type 'typeof (ring->size)' (aka 'const unsigned int') leaves the object uninitialized [-Werror,-Wdefault-const-init-var-unsafe] 63 | typecheck(typeof(ring->size), next); | ^ /usr/src/sys/compat/linuxkpi/common/include/linux/typecheck.h:31:9: note: expanded from macro 'typecheck' 31 | ({ type __var1; \ | ^ The thread at https://lkml.org/lkml/2025/5/6/1681 appears to imply that it is safe to suppress the new -Wdefault-const-init-var-unsafe warning.
Created attachment 266829 [details] graphics/drm-66-kmod: fix build with clang 21
Comment on attachment 266829 [details] graphics/drm-66-kmod: fix build with clang 21 LGTM. In my local tree for testing I added `CFLAGS+=-Wno-default-const-init-var-unsafe` unconditionally. Incidentally I noticed the comment on ports COMPILER_VERSION was incorrect for compilers with major version >= 10 -- https://reviews.freebsd.org/D54509
A commit in branch main references this bug: URL: https://cgit.FreeBSD.org/ports/commit/?id=2b49118158d0aa7cb20d98e470ee080ee0fdc931 commit 2b49118158d0aa7cb20d98e470ee080ee0fdc931 Author: Dimitry Andric <dim@FreeBSD.org> AuthorDate: 2026-01-05 00:19:34 +0000 Commit: Dimitry Andric <dim@FreeBSD.org> CommitDate: 2026-01-14 19:02:31 +0000 graphics/drm-66-kmod: fix build with clang 21 With clang 21 graphics/drm-66-kmod fails to compile, with errors similar to: In file included from /wrkdirs/usr/ports/graphics/drm-66-kmod/work/drm-kmod-drm_v6.6.25_9/drivers/gpu/drm/i915/i915_active.c:12: /wrkdirs/usr/ports/graphics/drm-66-kmod/work/drm-kmod-drm_v6.6.25_9/drivers/gpu/drm/i915/gt/intel_ring.h:63:2: error: default initialization of an object of type 'typeof (ring->size)' (aka 'const unsigned int') leaves the object uninitialized [-Werror,-Wdefault-const-init-var-unsafe] 63 | typecheck(typeof(ring->size), next); | ^ /usr/src/sys/compat/linuxkpi/common/include/linux/typecheck.h:31:9: note: expanded from macro 'typecheck' 31 | ({ type __var1; \ | ^ The thread at https://lkml.org/lkml/2025/5/6/1681 appears to imply that it is safe to suppress the new -Wdefault-const-init-var-unsafe warning. PR: 292192 Approved by: emaste (maintainer) MFH: 2026Q1 graphics/drm-66-kmod/Makefile | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-)
A commit in branch 2026Q1 references this bug: URL: https://cgit.FreeBSD.org/ports/commit/?id=6ab5fcd46c68322837520afa04f91922836ad6ff commit 6ab5fcd46c68322837520afa04f91922836ad6ff Author: Dimitry Andric <dim@FreeBSD.org> AuthorDate: 2026-01-05 00:19:34 +0000 Commit: Dimitry Andric <dim@FreeBSD.org> CommitDate: 2026-01-14 19:04:18 +0000 graphics/drm-66-kmod: fix build with clang 21 With clang 21 graphics/drm-66-kmod fails to compile, with errors similar to: In file included from /wrkdirs/usr/ports/graphics/drm-66-kmod/work/drm-kmod-drm_v6.6.25_9/drivers/gpu/drm/i915/i915_active.c:12: /wrkdirs/usr/ports/graphics/drm-66-kmod/work/drm-kmod-drm_v6.6.25_9/drivers/gpu/drm/i915/gt/intel_ring.h:63:2: error: default initialization of an object of type 'typeof (ring->size)' (aka 'const unsigned int') leaves the object uninitialized [-Werror,-Wdefault-const-init-var-unsafe] 63 | typecheck(typeof(ring->size), next); | ^ /usr/src/sys/compat/linuxkpi/common/include/linux/typecheck.h:31:9: note: expanded from macro 'typecheck' 31 | ({ type __var1; \ | ^ The thread at https://lkml.org/lkml/2025/5/6/1681 appears to imply that it is safe to suppress the new -Wdefault-const-init-var-unsafe warning. PR: 292192 Approved by: emaste (maintainer) MFH: 2026Q1 (cherry picked from commit 2b49118158d0aa7cb20d98e470ee080ee0fdc931) graphics/drm-66-kmod/Makefile | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-)