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6459947b9a
* Backport fix for arm64 CPUs without crypto extensions
(needed for a keywording bug).
* Add information in patch / background on the problem
(including mentioning the need for an ebuild change,
in case e.g. another distro tries to pick it up,
and to remind us to try upstream it.)
* Add explicit flag-o-matic inherits accordingly.
See: 619cfe3dae
Bug: https://bugs.gentoo.org/778926
Bug: https://bugs.gentoo.org/766411
Signed-off-by: Sam James <sam@gentoo.org>
24 lines
1.0 KiB
Diff
24 lines
1.0 KiB
Diff
Don't assume all ARM CPUs have crypto extensions.
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Requires an accompanying change in the ebuild to disable crypto
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extensions (by passing -DABSL_ARCH_ARM_NO_CRYPTO). This could
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be done by the build system instead in future.
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https://bugs.gentoo.org/778926
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--- /absl/random/internal/randen_hwaes.cc
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+++ /absl/random/internal/randen_hwaes.cc
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@@ -50,8 +50,11 @@
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(defined(__ARM_NEON) && defined(__ARM_FEATURE_CRYPTO))
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#define ABSL_RANDEN_HWAES_IMPL 1
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-#elif ABSL_RANDOM_INTERNAL_AES_DISPATCH && !defined(__APPLE__) && \
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- (defined(__GNUC__) && __GNUC__ > 4 || __GNUC__ == 4 && __GNUC_MINOR__ > 9)
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+// When ABSL_ARCH_ARM_NO_CRYPTO is defined, then ARM CPU without
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+// crypto extension is assumed.
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+#elif !defined(ABSL_ARCH_ARM_NO_CRYPTO) && \
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+ (ABSL_RANDOM_INTERNAL_AES_DISPATCH && !defined(__APPLE__) && \
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+ (defined(__GNUC__) && __GNUC__ > 4 || __GNUC__ == 4 && __GNUC_MINOR__ > 9))
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// ...or, on GCC, we can use an ASM directive to
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// instruct the assember to allow crypto instructions.
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#define ABSL_RANDEN_HWAES_IMPL 1
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