Version 3.0.1+ds-2.1 built before, but 3.0.3+ds-1 fails:

https://buildd.debian.org/status/fetch.php?pkg=mimalloc&arch=armhf&ver=3.0.3%2Bds-1&stamp=1744809460&raw=0

I imagine passing -march=armv8.1-a is also a baseline violation for armhf.

/usr/bin/cc -DMI_BUILD_RELEASE -DMI_CMAKE_BUILD_TYPE=relwithdebinfo -DMI_MALLOC_OVERRIDE -DMI_SHARED_LIB -DMI_SHARED_LIB_EXPORT -Dmimalloc_EXPORTS -I/build/reproducible-path/mimalloc-3.0.3+ds/include -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/build/reproducible-path/mimalloc-3.0.3+ds=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -Wall -pedantic -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -D_TIME_BITS=64 -Wdate-time -D_FORTIFY_SOURCE=2 -O2 -g -DNDEBUG -std=gnu11 -fPIC -Wall -Wextra -Wno-unknown-pragmas -fvisibility=hidden -Wstrict-prototypes -ftls-model=initial-exec -fno-builtin-malloc -march=armv8.1-a -MD -MT CMakeFiles/mimalloc.dir/src/alloc.c.o -MF CMakeFiles/mimalloc.dir/src/alloc.c.o.d -o CMakeFiles/mimalloc.dir/src/alloc.c.o -c /build/reproducible-path/mimalloc-3.0.3+ds/src/alloc.c
/usr/bin/cc -DMI_BUILD_RELEASE -DMI_CMAKE_BUILD_TYPE=relwithdebinfo -DMI_MALLOC_OVERRIDE -DMI_SHARED_LIB -DMI_SHARED_LIB_EXPORT -Dmimalloc_EXPORTS -I/build/reproducible-path/mimalloc-3.0.3+ds/include -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/build/reproducible-path/mimalloc-3.0.3+ds=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -Wall -pedantic -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -D_TIME_BITS=64 -Wdate-time -D_FORTIFY_SOURCE=2 -O2 -g -DNDEBUG -std=gnu11 -fPIC -Wall -Wextra -Wno-unknown-pragmas -fvisibility=hidden -Wstrict-prototypes -ftls-model=initial-exec -fno-builtin-malloc -march=armv8.1-a -MD -MT CMakeFiles/mimalloc.dir/src/alloc-aligned.c.o -MF CMakeFiles/mimalloc.dir/src/alloc-aligned.c.o.d -o CMakeFiles/mimalloc.dir/src/alloc-aligned.c.o -c /build/reproducible-path/mimalloc-3.0.3+ds/src/alloc-aligned.c
/usr/bin/cc -DMI_BUILD_RELEASE -DMI_CMAKE_BUILD_TYPE=relwithdebinfo -DMI_MALLOC_OVERRIDE -DMI_SHARED_LIB -DMI_SHARED_LIB_EXPORT -Dmimalloc_EXPORTS -I/build/reproducible-path/mimalloc-3.0.3+ds/include -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/build/reproducible-path/mimalloc-3.0.3+ds=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -Wall -pedantic -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -D_TIME_BITS=64 -Wdate-time -D_FORTIFY_SOURCE=2 -O2 -g -DNDEBUG -std=gnu11 -fPIC -Wall -Wextra -Wno-unknown-pragmas -fvisibility=hidden -Wstrict-prototypes -ftls-model=initial-exec -fno-builtin-malloc -march=armv8.1-a -MD -MT CMakeFiles/mimalloc.dir/src/alloc-posix.c.o -MF CMakeFiles/mimalloc.dir/src/alloc-posix.c.o.d -o CMakeFiles/mimalloc.dir/src/alloc-posix.c.o -c /build/reproducible-path/mimalloc-3.0.3+ds/src/alloc-posix.c
/usr/bin/cc -DMI_BUILD_RELEASE -DMI_CMAKE_BUILD_TYPE=relwithdebinfo -DMI_MALLOC_OVERRIDE -DMI_SHARED_LIB -DMI_SHARED_LIB_EXPORT -Dmimalloc_EXPORTS -I/build/reproducible-path/mimalloc-3.0.3+ds/include -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/build/reproducible-path/mimalloc-3.0.3+ds=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -Wall -pedantic -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -D_TIME_BITS=64 -Wdate-time -D_FORTIFY_SOURCE=2 -O2 -g -DNDEBUG -std=gnu11 -fPIC -Wall -Wextra -Wno-unknown-pragmas -fvisibility=hidden -Wstrict-prototypes -ftls-model=initial-exec -fno-builtin-malloc -march=armv8.1-a -MD -MT CMakeFiles/mimalloc.dir/src/arena-meta.c.o -MF CMakeFiles/mimalloc.dir/src/arena-meta.c.o.d -o CMakeFiles/mimalloc.dir/src/arena-meta.c.o -c /build/reproducible-path/mimalloc-3.0.3+ds/src/arena-meta.c
/usr/bin/cc -DMI_BUILD_RELEASE -DMI_CMAKE_BUILD_TYPE=relwithdebinfo -DMI_MALLOC_OVERRIDE -DMI_SHARED_LIB -DMI_SHARED_LIB_EXPORT -Dmimalloc_EXPORTS -I/build/reproducible-path/mimalloc-3.0.3+ds/include -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/build/reproducible-path/mimalloc-3.0.3+ds=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -Wall -pedantic -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -D_TIME_BITS=64 -Wdate-time -D_FORTIFY_SOURCE=2 -O2 -g -DNDEBUG -std=gnu11 -fPIC -Wall -Wextra -Wno-unknown-pragmas -fvisibility=hidden -Wstrict-prototypes -ftls-model=initial-exec -fno-builtin-malloc -march=armv8.1-a -MD -MT CMakeFiles/mimalloc.dir/src/arena.c.o -MF CMakeFiles/mimalloc.dir/src/arena.c.o.d -o CMakeFiles/mimalloc.dir/src/arena.c.o -c /build/reproducible-path/mimalloc-3.0.3+ds/src/arena.c
/usr/bin/cc -DMI_BUILD_RELEASE -DMI_CMAKE_BUILD_TYPE=relwithdebinfo -DMI_MALLOC_OVERRIDE -DMI_SHARED_LIB -DMI_SHARED_LIB_EXPORT -Dmimalloc_EXPORTS -I/build/reproducible-path/mimalloc-3.0.3+ds/include -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/build/reproducible-path/mimalloc-3.0.3+ds=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -Wall -pedantic -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -D_TIME_BITS=64 -Wdate-time -D_FORTIFY_SOURCE=2 -O2 -g -DNDEBUG -std=gnu11 -fPIC -Wall -Wextra -Wno-unknown-pragmas -fvisibility=hidden -Wstrict-prototypes -ftls-model=initial-exec -fno-builtin-malloc -march=armv8.1-a -MD -MT CMakeFiles/mimalloc.dir/src/bitmap.c.o -MF CMakeFiles/mimalloc.dir/src/bitmap.c.o.d -o CMakeFiles/mimalloc.dir/src/bitmap.c.o -c /build/reproducible-path/mimalloc-3.0.3+ds/src/bitmap.c
/usr/bin/cc -DMI_BUILD_RELEASE -DMI_CMAKE_BUILD_TYPE=relwithdebinfo -DMI_MALLOC_OVERRIDE -DMI_SHARED_LIB -DMI_SHARED_LIB_EXPORT -Dmimalloc_EXPORTS -I/build/reproducible-path/mimalloc-3.0.3+ds/include -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/build/reproducible-path/mimalloc-3.0.3+ds=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -Wall -pedantic -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -D_TIME_BITS=64 -Wdate-time -D_FORTIFY_SOURCE=2 -O2 -g -DNDEBUG -std=gnu11 -fPIC -Wall -Wextra -Wno-unknown-pragmas -fvisibility=hidden -Wstrict-prototypes -ftls-model=initial-exec -fno-builtin-malloc -march=armv8.1-a -MD -MT CMakeFiles/mimalloc.dir/src/heap.c.o -MF CMakeFiles/mimalloc.dir/src/heap.c.o.d -o CMakeFiles/mimalloc.dir/src/heap.c.o -c /build/reproducible-path/mimalloc-3.0.3+ds/src/heap.c
cc1: error: ‘-mfloat-abi=hard’: selected architecture lacks an FPU
cc1: error: ‘-mfloat-abi=hard’: selected architecture lacks an FPU
cc1: error: ‘-mfloat-abi=hard’: selected architecture lacks an FPU
cc1: error: ‘-mfloat-abi=hard’: selected architecture lacks an FPU
make[3]: *** [CMakeFiles/mimalloc.dir/build.make:82: CMakeFiles/mimalloc.dir/src/alloc.c.o] Error 1
make[3]: *** Waiting for unfinished jobs....
make[3]: *** [CMakeFiles/mimalloc.dir/build.make:96: CMakeFiles/mimalloc.dir/src/alloc-aligned.c.o] Error 1
cc1: error: ‘-mfloat-abi=hard’: selected architecture lacks an FPU
make[3]: *** [CMakeFiles/mimalloc.dir/build.make:110: CMakeFiles/mimalloc.dir/src/alloc-posix.c.o] Error 1
cc1: error: ‘-mfloat-abi=hard’: selected architecture lacks an FPU
cc1: error: ‘-mfloat-abi=hard’: selected architecture lacks an FPU
make[3]: *** [CMakeFiles/mimalloc.dir/build.make:138: CMakeFiles/mimalloc.dir/src/arena-meta.c.o] Error 1
make[3]: *** [CMakeFiles/mimalloc.dir/build.make:124: CMakeFiles/mimalloc.dir/src/arena.c.o] Error 1
make[3]: *** [CMakeFiles/mimalloc.dir/build.make:152: CMakeFiles/mimalloc.dir/src/bitmap.c.o] Error 1
make[3]: *** [CMakeFiles/mimalloc.dir/build.make:166: CMakeFiles/mimalloc.dir/src/heap.c.o] Error 1
[ 47%] Building C object CMakeFiles/mimalloc.dir/src/init.c.o
/usr/bin/cc -DMI_BUILD_RELEASE -DMI_CMAKE_BUILD_TYPE=relwithdebinfo -DMI_MALLOC_OVERRIDE -DMI_SHARED_LIB -DMI_SHARED_LIB_EXPORT -Dmimalloc_EXPORTS -I/build/reproducible-path/mimalloc-3.0.3+ds/include -g -O2 -Werror=implicit-function-declaration -ffile-prefix-map=/build/reproducible-path/mimalloc-3.0.3+ds=. -fstack-protector-strong -fstack-clash-protection -Wformat -Werror=format-security -Wall -pedantic -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -D_TIME_BITS=64 -Wdate-time -D_FORTIFY_SOURCE=2 -O2 -g -DNDEBUG -std=gnu11 -fPIC -Wall -Wextra -Wno-unknown-pragmas -fvisibility=hidden -Wstrict-prototypes -ftls-model=initial-exec -fno-builtin-malloc -march=armv8.1-a -MD -MT CMakeFiles/mimalloc.dir/src/init.c.o -MF CMakeFiles/mimalloc.dir/src/init.c.o.d -o CMakeFiles/mimalloc.dir/src/init.c.o -c /build/reproducible-path/mimalloc-3.0.3+ds/src/init.c
cc1: error: ‘-mfloat-abi=hard’: selected architecture lacks an FPU
make[3]: *** [CMakeFiles/mimalloc.dir/build.make:180: CMakeFiles/mimalloc.dir/src/init.c.o] Error 1
make[3]: Leaving directory '/build/reproducible-path/mimalloc-3.0.3+ds/obj-arm-linux-gnueabihf'
make[2]: *** [CMakeFiles/Makefile2:90: CMakeFiles/mimalloc.dir/all] Error 2
make[2]: Leaving directory '/build/reproducible-path/mimalloc-3.0.3+ds/obj-arm-linux-gnueabihf'
make[1]: *** [Makefile:139: all] Error 2
make[1]: Leaving directory '/build/reproducible-path/mimalloc-3.0.3+ds/obj-arm-linux-gnueabihf'
dh_auto_build: error: cd obj-arm-linux-gnueabihf && make -j8 "INSTALL=install --strip-program=true" VERBOSE=1 returned exit code 2
make: *** [debian/rules:19: binary-arch] Error 25
dpkg-buildpackage: error: debian/rules binary-arch subprocess returned exit status 2
--------------------------------------------------------------------------------
Build finished at 2025-04-16T13:17:38Z

[...]

There are two problems here.  Firstly, it misdetects the architecture as
arm64 because of the running kernel (this code is new in 3.0.3):

   elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "^(aarch64|arm64|armv[89].?|ARM64)$" OR CMAKE_GENERATOR_PLATFORM STREQUAL "ARM64" OR "arm64" IN_LIST CMAKE_OSX_ARCHITECTURES)
     set(MI_ARCH "arm64")
   elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "^(arm|armv[34567]|ARM)$")
     set(MI_ARCH "arm32")

(That seems to have various other possible consequences; grep for
MI_ARCH_ARM64.  And of course this sort of checking strategy breaks
cross-builds as well.)

Secondly, this code in CMakeLists.txt defeats passing -DMI_OPT_ARCH=OFF
from debian/rules:

if(MI_NO_OPT_ARCH)
   set(MI_OPT_ARCH "OFF")
elseif(MI_ARCH STREQUAL "arm64")
   set(MI_OPT_ARCH "ON")  # enable armv8.1-a by default on arm64 unless MI_NO_OPT_ARCH is set
endif()

Since the repository is in Salsa's Debian group and the maintainer is in
LowThresholdNmu, I've gone ahead and committed the attached patch to git
for the second problem.  I haven't closed this bug with it yet though
since I think the first problem probably needs to be fixed too.

In fact, despite the name appearing similar to the cmake-level MI_ARCH,
MI_ARCH_ARM64 is set in include/mimalloc/bits.h based on preprocessor
definitions such as __aarch64__, which is probably fine.  And overriding
CMAKE_SYSTEM_PROCESSOR doesn't seem to be easy; I tried a conditional
-DCMAKE_SYSTEM_PROCESSOR=armv7l, and that was ignored.

So I'm actually inclined to just call this bug done with my previous
commit, although I still want to investigate
https://bugs.debian.org/1106879 before uploading it.

I filed https://bugs.debian.org/1110961 for a possible improvement in
debhelper.

My mistake; debhelper sets CMAKE_SYSTEM_PROCESSOR in that case, or at
least tries, and it's documented
(https://cmake.org/cmake/help/latest/variable/CMAKE_SYSTEM_PROCESSOR.html)
as being cross-aware.

Dear maintainer,

I've prepared an NMU for mimalloc (versioned as 3.0.3+ds-1.1) and
uploaded it per the low-threshold NMU rules (also because this is an RC
bug that has been open for nearly four months and is blocking some other
packages I work on).  Diff attached.

Thanks,

We believe that the bug you reported is fixed in the latest version of
mimalloc, which is due to be installed in the Debian FTP archive.

A summary of the changes between this version and the previous one is
attached.

Thank you for reporting the bug, which will now be closed.  If you
have further comments please address them to 1103589@bugs.debian.org,
and the maintainer will reopen the bug report if appropriate.

Debian distribution maintenance software
pp.
Colin Watson <cjwatson@debian.org> (supplier of updated mimalloc package)

(This message was generated automatically at their request; if you
believe that there is a problem with it please contact the archive
administrators by mailing ftpmaster@ftp-master.debian.org)
Format: 1.8
Date: Wed, 13 Aug 2025 12:06:40 +0100
Source: mimalloc
Architecture: source
Version: 3.0.3+ds-1.1
Distribution: unstable
Urgency: medium
Maintainer: Alex Myczko <tar@debian.org>
Changed-By: Colin Watson <cjwatson@debian.org>
Closes: 1103589
Changes:
 mimalloc (3.0.3+ds-1.1) unstable; urgency=medium
 .
   * Non-maintainer upload.
   * Build with -DMI_NO_OPT_ARCH=ON rather than -DMI_OPT_ARCH=OFF, since the
     latter is ineffective on systems that the build system thinks are arm64
     (closes: #1103589).
Checksums-Sha1:
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Files:
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 12eb36386804692a50fdb680243b3036 3720 libs optional mimalloc_3.0.3+ds-1.1.debian.tar.xz
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Git-Tag-Info: tag=dbf16cb6fa0a9a49aef20bb41925bc88b0084d43 fp=ac0a4ff12611b6fccf01c111393587d97d86500b
Git-Tag-Tagger: Colin Watson <cjwatson@debian.org>
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