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From: | Paul Eggert |
Subject: | Re: [platform-testers] new snapshot available: grep-3.4-almost.19-ff30 |
Date: | Thu, 17 Sep 2020 12:22:09 -0700 |
User-agent: | Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 |
On 9/17/20 8:30 AM, Nelson H. F. Beebe wrote:
On OpenMandriva Lx 4.1 (Mercury), with /usr/bin/cc == clang version 9.0.1, I get CC dfa.o In file included from dfa.c:61: ./xalloc.h:94:7: error: use of unknown builtin '__builtin_mul_overflow_p' [-Wimplicit-function-declaration] if (xalloc_oversized (n, s)) ^ ./xalloc-oversized.h:46:4: note: expanded from macro 'xalloc_oversized' __builtin_mul_overflow_p (n, s, (__xalloc_count_type) 1) ^ ... long cascade of similar errors ...
Thanks for reporting that. I guess Clang 9.0.1 defines __GNUC__ to be >=7 even though it doesn't implement all GCC 7 features. I installed the attached patch into Gnulib to try to work around this glitch, and this patch should appear in Grep the next time it syncs with Gnulib. cc'ing to bug-gnulib.
0001-intprops-xalloc-avoid-__builtin_mul_overflow_p-with-.patch
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