* [Buildroot] [PATCH] package/sysprof: fix build on 32-bit x86 with AVX2
@ 2026-10-19 12:31 Yegor Yefremov via buildroot
2026-10-19 13:18 ` Thomas Petazzoni via buildroot
2026-10-19 13:57 ` [Buildroot] [PATCH v2] " Yegor Yefremov
0 siblings, 2 replies; 4+ messages in thread
From: Yegor Yefremov via buildroot @ 2026-10-19 12:31 UTC (permalink / raw)
To: buildroot; +Cc: Adrian Perez de Castro
From: Yegor Yefremov <yegorslists@googlemail.com>
The bundled CRoaring code enables its x64 specific code paths as soon
as __AVX2__ (or __POPCNT__ and __SSE4_2__) is defined, which also
happens on 32-bit x86 targets such as i686 with BR2_x86_haswell. This
results in calls to 64-bit only intrinsics:
roaring.h:260:18: error: implicit declaration of function '_mm_popcnt_u64'; did you mean '_mm_popcnt_u32'? [-Wimplicit-function-declaration]
Backport the upstream patch that defines DISABLE_X64 when building
for 32-bit x86, so that the portable implementation is used instead.
Fixes:
https://autobuild.buildroot.org/results/f00d523aa13923c9eb73ae4e1b1f04f297512351
Assisted-by: Claude:claude-opus-5-5
Signed-off-by: Yegor Yefremov <yegorslists@googlemail.com>
---
...disable-x64-code-paths-on-32-bit-x86.patch | 53 +++++++++++++++++++
1 file changed, 53 insertions(+)
create mode 100644 package/sysprof/0001-contrib-eggbitset-disable-x64-code-paths-on-32-bit-x86.patch
diff --git a/package/sysprof/0001-contrib-eggbitset-disable-x64-code-paths-on-32-bit-x86.patch b/package/sysprof/0001-contrib-eggbitset-disable-x64-code-paths-on-32-bit-x86.patch
new file mode 100644
index 0000000000..2b2c6cb6cb
--- /dev/null
+++ b/package/sysprof/0001-contrib-eggbitset-disable-x64-code-paths-on-32-bit-x86.patch
@@ -0,0 +1,53 @@
+From 22c10f0dbd3c357e96f83f430ebe05d24a25c536 Mon Sep 17 00:00:00 2001
+From: Yegor Yefremov <yegorslists@googlemail.com>
+Date: Sat, 17 Oct 2026 22:47:15 +0200
+Subject: [PATCH] contrib/eggbitset: disable x64 code paths on 32-bit x86
+
+roaring.h enables USEAVX (and thus IS_X64) whenever __AVX2__ is defined,
+and USESSE4 whenever __POPCNT__ and __SSE4_2__ are defined. This also
+happens on 32-bit x86 targets such as i686 built with -march=haswell,
+where 64-bit only intrinsics like _mm_popcnt_u64() and
+_mm256_extract_epi64() are not available, so the build fails with:
+
+ roaring.h:260:18: error: implicit declaration of function
+ '_mm_popcnt_u64'; did you mean '_mm_popcnt_u32'?
+ [-Wimplicit-function-declaration]
+ roaring.h:1011:23: error: implicit declaration of function
+ '_mm256_extract_epi64'; did you mean '_mm256_extract_epi8'?
+ [-Wimplicit-function-declaration]
+
+Define DISABLE_X64 from the build system when building for 32-bit x86 so
+that the portable implementation is used instead. This keeps the bundled
+CRoaring sources unmodified, making future updates a plain copy.
+DISABLE_X64 is only set for x86, as it also guards the NEON detection
+used on ARM.
+
+Upstream: https://gitlab.gnome.org/GNOME/sysprof/-/commit/22c10f0dbd3c357e96f83f430ebe05d24a25c536
+Signed-off-by: Yegor Yefremov <yegorslists@googlemail.com>
+---
+ contrib/eggbitset/meson.build | 9 +++++++++
+ 1 file changed, 9 insertions(+)
+
+diff --git a/contrib/eggbitset/meson.build b/contrib/eggbitset/meson.build
+index 82cd8a40..f2f81685 100644
+--- a/contrib/eggbitset/meson.build
++++ b/contrib/eggbitset/meson.build
+@@ -6,9 +6,18 @@ libeggbitset_deps = [
+ gio_dep,
+ ]
+
++libeggbitset_c_args = []
++
++# roaring.h enables its x64 code paths based on __AVX2__/__SSE4_2__ alone,
++# but they rely on intrinsics only available on 64-bit x86.
++if host_machine.cpu_family() == 'x86'
++ libeggbitset_c_args += ['-DDISABLE_X64']
++endif
++
+ libeggbitset_static = static_library('eggbitset', libeggbitset_sources,
+ gnu_symbol_visibility: 'hidden',
+ dependencies: libeggbitset_deps,
++ c_args: libeggbitset_c_args,
+ )
+
+ libeggbitset_static_dep = declare_dependency(
--
2.34.1
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^ permalink raw reply related [flat|nested] 4+ messages in thread* Re: [Buildroot] [PATCH] package/sysprof: fix build on 32-bit x86 with AVX2
2026-10-19 12:31 [Buildroot] [PATCH] package/sysprof: fix build on 32-bit x86 with AVX2 Yegor Yefremov via buildroot
@ 2026-10-19 13:18 ` Thomas Petazzoni via buildroot
2026-10-19 13:57 ` [Buildroot] [PATCH v2] " Yegor Yefremov
1 sibling, 0 replies; 4+ messages in thread
From: Thomas Petazzoni via buildroot @ 2026-10-19 13:18 UTC (permalink / raw)
To: Yegor Yefremov; +Cc: buildroot, Adrian Perez de Castro
On Mon, Oct 19, 2026 at 02:31:33PM +0200, Yegor Yefremov via buildroot wrote:
> From: Yegor Yefremov <yegorslists@googlemail.com>
>
> The bundled CRoaring code enables its x64 specific code paths as soon
> as __AVX2__ (or __POPCNT__ and __SSE4_2__) is defined, which also
> happens on 32-bit x86 targets such as i686 with BR2_x86_haswell. This
> results in calls to 64-bit only intrinsics:
>
> roaring.h:260:18: error: implicit declaration of function '_mm_popcnt_u64'; did you mean '_mm_popcnt_u32'? [-Wimplicit-function-declaration]
>
> Backport the upstream patch that defines DISABLE_X64 when building
> for 32-bit x86, so that the portable implementation is used instead.
>
> Fixes:
> https://autobuild.buildroot.org/results/f00d523aa13923c9eb73ae4e1b1f04f297512351
>
> Assisted-by: Claude:claude-opus-5-5
> Signed-off-by: Yegor Yefremov <yegorslists@googlemail.com>
Same request as usual: could you please indicate which Buildroot
commit introduced the issue, so that our LTS maintainers have an easy
way of figuring out whether or not this fix needs to be backported to
our stable branches?
If you could make sure to perform this investigation and include the
results in your commit message for all fixes, it would be really nice!
Thanks!
Thomas Petazzoni
--
Thomas Petazzoni, co-owner and CEO, Bootlin
Embedded Linux and Kernel engineering and training
https://bootlin.com
_______________________________________________
buildroot mailing list
buildroot@buildroot.org
https://lists.buildroot.org/mailman/listinfo/buildroot
^ permalink raw reply [flat|nested] 4+ messages in thread
* [Buildroot] [PATCH v2] package/sysprof: fix build on 32-bit x86 with AVX2
2026-10-19 12:31 [Buildroot] [PATCH] package/sysprof: fix build on 32-bit x86 with AVX2 Yegor Yefremov via buildroot
2026-10-19 13:18 ` Thomas Petazzoni via buildroot
@ 2026-10-19 13:57 ` Yegor Yefremov
2026-10-19 14:15 ` Thomas Petazzoni via buildroot
1 sibling, 1 reply; 4+ messages in thread
From: Yegor Yefremov @ 2026-10-19 13:57 UTC (permalink / raw)
To: buildroot; +Cc: Adrian Perez de Castro, Thomas Petazzoni
From: Yegor Yefremov <yegorslists@googlemail.com>
The bundled CRoaring code enables its x64 specific code paths as soon
as __AVX2__ (or __POPCNT__ and __SSE4_2__) is defined, which also
happens on 32-bit x86 targets such as i686 with BR2_x86_haswell. This
results in calls to 64-bit only intrinsics:
roaring.h:260:18: error: implicit declaration of function '_mm_popcnt_u64'; did you mean '_mm_popcnt_u32'? [-Wimplicit-function-declaration]
Backport the upstream patch that defines DISABLE_X64 when building
for 32-bit x86, so that the portable implementation is used instead.
This issue has been present since commit 0d57555407 ("package/sysprof:
update to version 46.0"), which switched to the new sysprof code base
bundling CRoaring in contrib/eggbitset. It therefore affects 2024.08
and later.
Fixes:
https://autobuild.buildroot.org/results/f00d523aa13923c9eb73ae4e1b1f04f297512351
Assisted-by: Claude:claude-opus-5-5
Signed-off-by: Yegor Yefremov <yegorslists@googlemail.com>
---
Changes v1 -> v2:
- mention the commit that introduced the issue (suggested by Thomas)
...disable-x64-code-paths-on-32-bit-x86.patch | 53 +++++++++++++++++++
1 file changed, 53 insertions(+)
create mode 100644 package/sysprof/0001-contrib-eggbitset-disable-x64-code-paths-on-32-bit-x86.patch
diff --git a/package/sysprof/0001-contrib-eggbitset-disable-x64-code-paths-on-32-bit-x86.patch b/package/sysprof/0001-contrib-eggbitset-disable-x64-code-paths-on-32-bit-x86.patch
new file mode 100644
index 0000000000..2b2c6cb6cb
--- /dev/null
+++ b/package/sysprof/0001-contrib-eggbitset-disable-x64-code-paths-on-32-bit-x86.patch
@@ -0,0 +1,53 @@
+From 22c10f0dbd3c357e96f83f430ebe05d24a25c536 Mon Sep 17 00:00:00 2001
+From: Yegor Yefremov <yegorslists@googlemail.com>
+Date: Sat, 17 Oct 2026 22:47:15 +0200
+Subject: [PATCH] contrib/eggbitset: disable x64 code paths on 32-bit x86
+
+roaring.h enables USEAVX (and thus IS_X64) whenever __AVX2__ is defined,
+and USESSE4 whenever __POPCNT__ and __SSE4_2__ are defined. This also
+happens on 32-bit x86 targets such as i686 built with -march=haswell,
+where 64-bit only intrinsics like _mm_popcnt_u64() and
+_mm256_extract_epi64() are not available, so the build fails with:
+
+ roaring.h:260:18: error: implicit declaration of function
+ '_mm_popcnt_u64'; did you mean '_mm_popcnt_u32'?
+ [-Wimplicit-function-declaration]
+ roaring.h:1011:23: error: implicit declaration of function
+ '_mm256_extract_epi64'; did you mean '_mm256_extract_epi8'?
+ [-Wimplicit-function-declaration]
+
+Define DISABLE_X64 from the build system when building for 32-bit x86 so
+that the portable implementation is used instead. This keeps the bundled
+CRoaring sources unmodified, making future updates a plain copy.
+DISABLE_X64 is only set for x86, as it also guards the NEON detection
+used on ARM.
+
+Upstream: https://gitlab.gnome.org/GNOME/sysprof/-/commit/22c10f0dbd3c357e96f83f430ebe05d24a25c536
+Signed-off-by: Yegor Yefremov <yegorslists@googlemail.com>
+---
+ contrib/eggbitset/meson.build | 9 +++++++++
+ 1 file changed, 9 insertions(+)
+
+diff --git a/contrib/eggbitset/meson.build b/contrib/eggbitset/meson.build
+index 82cd8a40..f2f81685 100644
+--- a/contrib/eggbitset/meson.build
++++ b/contrib/eggbitset/meson.build
+@@ -6,9 +6,18 @@ libeggbitset_deps = [
+ gio_dep,
+ ]
+
++libeggbitset_c_args = []
++
++# roaring.h enables its x64 code paths based on __AVX2__/__SSE4_2__ alone,
++# but they rely on intrinsics only available on 64-bit x86.
++if host_machine.cpu_family() == 'x86'
++ libeggbitset_c_args += ['-DDISABLE_X64']
++endif
++
+ libeggbitset_static = static_library('eggbitset', libeggbitset_sources,
+ gnu_symbol_visibility: 'hidden',
+ dependencies: libeggbitset_deps,
++ c_args: libeggbitset_c_args,
+ )
+
+ libeggbitset_static_dep = declare_dependency(
--
2.34.1
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^ permalink raw reply related [flat|nested] 4+ messages in thread* Re: [Buildroot] [PATCH v2] package/sysprof: fix build on 32-bit x86 with AVX2
2026-10-19 13:57 ` [Buildroot] [PATCH v2] " Yegor Yefremov
@ 2026-10-19 14:15 ` Thomas Petazzoni via buildroot
0 siblings, 0 replies; 4+ messages in thread
From: Thomas Petazzoni via buildroot @ 2026-10-19 14:15 UTC (permalink / raw)
To: Yegor Yefremov; +Cc: buildroot, Adrian Perez de Castro
On Mon, Oct 19, 2026 at 03:57:21PM +0200, Yegor Yefremov wrote:
> From: Yegor Yefremov <yegorslists@googlemail.com>
>
> The bundled CRoaring code enables its x64 specific code paths as soon
> as __AVX2__ (or __POPCNT__ and __SSE4_2__) is defined, which also
> happens on 32-bit x86 targets such as i686 with BR2_x86_haswell. This
> results in calls to 64-bit only intrinsics:
>
> roaring.h:260:18: error: implicit declaration of function '_mm_popcnt_u64'; did you mean '_mm_popcnt_u32'? [-Wimplicit-function-declaration]
>
> Backport the upstream patch that defines DISABLE_X64 when building
> for 32-bit x86, so that the portable implementation is used instead.
>
> This issue has been present since commit 0d57555407 ("package/sysprof:
> update to version 46.0"), which switched to the new sysprof code base
> bundling CRoaring in contrib/eggbitset. It therefore affects 2024.08
> and later.
>
> Fixes:
> https://autobuild.buildroot.org/results/f00d523aa13923c9eb73ae4e1b1f04f297512351
>
> Assisted-by: Claude:claude-opus-5-5
> Signed-off-by: Yegor Yefremov <yegorslists@googlemail.com>
I've added a proper Fixes: tag pointing to the commit that first
caused the issue, and applied to master. Thanks!
Best regards,
Thomas Petazzoni
--
Thomas Petazzoni, co-owner and CEO, Bootlin
Embedded Linux and Kernel engineering and training
https://bootlin.com
_______________________________________________
buildroot mailing list
buildroot@buildroot.org
https://lists.buildroot.org/mailman/listinfo/buildroot
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2026-10-19 12:31 [Buildroot] [PATCH] package/sysprof: fix build on 32-bit x86 with AVX2 Yegor Yefremov via buildroot
2026-10-19 13:18 ` Thomas Petazzoni via buildroot
2026-10-19 13:57 ` [Buildroot] [PATCH v2] " Yegor Yefremov
2026-10-19 14:15 ` Thomas Petazzoni via buildroot
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