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ac1ca473b5
absl::base_internal::DirectMmap() only implements mmap() via mmap2 for
the o32 ABI on MIPS:
#if ... (defined(__mips__) && _MIPS_SIM == _MIPS_SIM_ABI32) || ...
With the n32 ABI, the "remaining 64-bit architectures" fallback is
selected instead, which fails to build because long is 32-bit there:
absl/base/internal/direct_mmap.h: In function 'void* absl::lts_20260107::base_internal::DirectMmap(void*, size_t, int, int, int, off_t)':
absl/base/internal/direct_mmap.h:130:39: error: static assertion failed: Platform is not 64-bit
130 | static_assert(sizeof(unsigned long) == 8, "Platform is not 64-bit");
| ~~~~~~~~~~~~~~~~~~~~~~^~~~
absl/base/internal/direct_mmap.h:130:39: note: the comparison reduces to '(4 == 8)'
direct_mmap.h is included by absl/base/internal/low_level_alloc.cc and
absl/base/internal/poison.cc, which are always built, so the failure is
unconditional. Upstream abseil has no support for the n32 ABI, so
disable the package for that ABI.
Since n32 is the default ABI for BR2_mips64/BR2_mips64el, this affects
every mips64 build that does not explicitly select n64. The o32
(BR2_MIPS_OABI32) and n64 (BR2_MIPS_NABI64) ABIs are unaffected, and all
in-tree mips64 defconfigs use n64.
For the LTS maintainers: the ABI list in direct_mmap.h is identical in
abseil 20200225 (the version in tree when the arch dependencies were
introduced) and in the current 20260817.0, so the failure has existed
ever since mips64 was allowed. It is still reproduced on all maintained
branches, e.g.:
2026.02.x https://autobuild.buildroot.net/results/5818407a73cfd3371cd1f726a24df6ceb9afa42d/
2025.02.x https://autobuild.buildroot.net/results/5065bda3b91bdbee53559dd97af8ab5a63a1e112/
so a backport is needed there.
Fixes: ae0557403a ("package/libabseil-cpp: add BR2_PACKAGE_LIBABSEIL_CPP_ARCH_SUPPORTS")
Fixes:
https://autobuild.buildroot.net/results/f375584f3721d61238b9e43d9926e037802f6141/
Assisted-by: Claude:claude-opus-5
Signed-off-by: Yegor Yefremov <yegorslists@googlemail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
(cherry picked from commit 263cfb165e)
Signed-off-by: Raphaël Mélotte <raphael.melotte@mind.be>
Buildroot is a simple, efficient and easy-to-use tool to generate embedded Linux systems through cross-compilation. The documentation can be found in docs/manual. You can generate a text document with 'make manual-text' and read output/docs/manual/manual.text. Online documentation can be found at https://buildroot.org/docs.html To build and use the buildroot stuff, do the following: 1) run 'make menuconfig' 2) select the target architecture and the packages you wish to compile 3) run 'make' 4) wait while it compiles 5) find the kernel, bootloader, root filesystem, etc. in output/images You do not need to be root to build or run buildroot. Have fun! Buildroot comes with a basic configuration for a number of boards. Run 'make list-defconfigs' to view the list of provided configurations. Please feed suggestions, bug reports, insults, and bribes back to the buildroot mailing list: buildroot@buildroot.org You can also find us on #buildroot on OFTC IRC. If you would like to contribute patches, please read https://buildroot.org/manual.html#submitting-patches