mirror of
https://gitlab.com/buildroot.org/buildroot.git
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25cb3813e7
Subproject tarballs are not provided anymore:
https://discourse.llvm.org/t/llvm-22-1-0-released/89950
"Please note since the last release the subproject tarballs have been
removed"
https://discourse.llvm.org/t/rfc-do-something-with-the-subproject-tarballs-in-the-release-page/75024/14
Used upstream tarball llvm-project-22.1.0.src.tar.xz for all packages
and linked subproject hash files to ../llvm-project.hash.
Removed patches which fix build errors caused by subproject tarballs.
Removed handling of third-party-21.1.8.src.tar.xz which is included in
the monolithic tarball.
Added _SUBDIR variable or updated _INSTALL_CMDS when needed.
For compiler-rt:
Removed both patches, they are not needed anymore.
Added patch to fix aarch64 build.
Added dependency on gcc >= 15.x because libcxx now depends on gcc >=
15.x: https://github.com/llvm/llvm-project/pull/165684
warning "Libc++ only supports GCC 15 and later"
Building with gcc 14.x causes many build errors like
output/build/compiler-rt-22.1.0/compiler-rt/buildroot-build/lib/fuzzer/libcxx_fuzzer_x86_64/build/include/c++/v1/__type_traits/is_array.h:43:68:
error: expected primary-expression before ')' token
output/build/compiler-rt-22.1.0/compiler-rt/buildroot-build/lib/fuzzer/libcxx_fuzzer_x86_64/build/include/c++/v1/__type_traits/is_array.h:43:44:
error: there are no arguments to '__is_unbounded_array' that depend on
a template parameter, so a declaration of '__is_unbounded_array' must
be available [-fpermissive]
output/build/compiler-rt-22.1.0/compiler-rt/buildroot-build/lib/fuzzer/libcxx_fuzzer_x86_64/build/include/c++/v1/__type_traits/decay.h:22:32:
error: expected type-specifier before '__decay'
A corresponding bug report sent upstream
https://github.com/llvm/llvm-project/issues/174203
was answered:
https://github.com/llvm/llvm-project/issues/174203#issuecomment-3711113919
"Our policy is rather clear: Only the latest GCC is supported."
and an update to supported compiler versions was committed:
d1146b1ddd
Updated TestClangCompilerRT to use a gcc 15-based toolchain.
Signed-off-by: Bernd Kuhls <bernd@kuhls.net>
Signed-off-by: Julien Olivain <ju.o@free.fr>
71 lines
2.5 KiB
Diff
71 lines
2.5 KiB
Diff
From 4e1af872f819782bd233ab21953ab92cf36ff9c3 Mon Sep 17 00:00:00 2001
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From: Bernd Kuhls <bernd@kuhls.net>
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Date: Mon, 9 Mar 2026 19:07:10 +0100
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Subject: [PATCH] [libc] Fix detection of cfloat128
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Building compiler-rt with aarch64-buildroot-linux-gnu-gcc 15.2 causes a
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build error:
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compiler-rt-22.1.0/cmake/Modules/../../libc/src/__support/CPP/type_traits/is_complex.h:44:31:
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error: 'cfloat128' was not declared in this scope; did you mean 'float128'? [-Wtemplate-body]
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According to https://gcc.gnu.org/onlinedocs/gcc-15.2.0/gcc/Floating-Types.html
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__float128 is not available on aarch64.
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Analyzing the gcc defines for aarch64 seems to prove it:
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$ aarch64-buildroot-linux-gnu-gcc -v
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Target: aarch64-buildroot-linux-gnu
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gcc version 15.2.0 (Buildroot 2026.02-114-gdadec9da56)
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$ echo | aarch64-buildroot-linux-gnu-gcc -dM -E - | grep __GCC_IEC_559_COMPLEX
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#define __GCC_IEC_559_COMPLEX 2
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$ echo | aarch64-buildroot-linux-gnu-gcc -dM -E - | grep __STDC_IEC_60559_COMPLEX__
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#define __STDC_IEC_60559_COMPLEX__ 201404L
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$ echo | aarch64-buildroot-linux-gnu-gcc -dM -E - | grep -i float128
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$
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In contrast gcc for x86_64:
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$ x86_64-buildroot-linux-gnu-gcc -v
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Target: x86_64-buildroot-linux-gnu
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gcc version 15.2.0 (Buildroot 2026.02-112-gd12ac02486)
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$ echo | x86_64-buildroot-linux-gnu-gcc -dM -E - | grep __GCC_IEC_559_COMPLEX
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#define __GCC_IEC_559_COMPLEX 2
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$ echo | x86_64-buildroot-linux-gnu-gcc -dM -E - | grep __STDC_IEC_60559_COMPLEX__
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#define __STDC_IEC_60559_COMPLEX__ 201404L
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$ echo | x86_64-buildroot-linux-gnu-gcc -dM -E - | grep -i float128
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#define __SIZEOF_FLOAT128__ 16
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This patch changes the or-condition to an and-condition for
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__STDC_IEC_60559_COMPLEX__ and __SIZEOF_FLOAT128__.
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Upstream: https://github.com/llvm/llvm-project/pull/185486
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Signed-off-by: Bernd Kuhls <bernd@kuhls.net>
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---
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libc/include/llvm-libc-macros/cfloat128-macros.h | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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diff --git a/libc/include/llvm-libc-macros/cfloat128-macros.h b/libc/include/llvm-libc-macros/cfloat128-macros.h
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index 5f28cfa21aae..ff4aa530685d 100644
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--- a/libc/include/llvm-libc-macros/cfloat128-macros.h
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+++ b/libc/include/llvm-libc-macros/cfloat128-macros.h
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@@ -27,7 +27,7 @@
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#define LIBC_TYPES_HAS_CFLOAT128
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#endif
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#elif defined(__GNUC__)
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-#if (defined(__STDC_IEC_60559_COMPLEX__) || defined(__SIZEOF_FLOAT128__)) && \
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+#if (defined(__STDC_IEC_60559_COMPLEX__) && defined(__SIZEOF_FLOAT128__)) && \
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(__GNUC__ >= 13 || (!defined(__cplusplus)))
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#define LIBC_TYPES_HAS_CFLOAT128
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#endif
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--
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2.47.3
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