Re: Building master on Windows fails with undefined reference to `__builtin_assume_aligned'

[martin rudalics]

>> ../../src/lisp.h:878:3: warning: implicit declaration of function 
'__builtin_assume_aligned' [-Wimplicit-function-declaration]
>
> What version of GCC are you using?

gcc (GCC) 4.6.2

> What are the values of the C macros __GNUC__,

4

> __GNUC_MINOR__,

6

> and __GNUC_PATCHLEVEL__?

2

(as expected I believe).

> 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?

Something else must be at work here.  Note that I do not get the errors
with CFLAGS='-O0 -g2 -gdwarf-2' (from my debug-build options).

martin