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Re: Building master on Windows fails with undefined reference to `__buil
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From: |
Paul Eggert |
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Subject: |
Re: Building master on Windows fails with undefined reference to `__builtin_assume_aligned' |
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Date: |
Sat, 25 Jun 2016 23:40:10 +0200 |
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User-agent: |
Mozilla/5.0 (X11; Linux i686; rv:38.0) Gecko/20100101 Thunderbird/38.8.0 |
On 06/25/2016 10:17 AM, martin rudalics wrote:
../../src/lisp.h:878:3: warning: implicit declaration of function
'__builtin_assume_aligned' [-Wimplicit-function-declaration]
What version of GCC are you using? What are the values of the C macros
__GNUC__, __GNUC_MINOR__, and __GNUC_PATCHLEVEL__? Currently,
src/conf_post.h has this:
# define __has_builtin___builtin_assume_aligned GNUC_PREREQ (4, 7, 0)
which means the code assumes that GCC 4.7.0 and later support
__builtin_assume_aligned (I got this from the GCC NEWS files). Perhaps
that "(4, 7, 0)" is too low and needs to be increased a bit?