Hi Gerald,
> On Sun, 22 Jul 2018, Gerald Pfeifer wrote:
>> With clang version 3.4 (system compiler on FreeBSD 10.x) this is
>> even a hard error and GCC failed to build. So thanks for fixing
>> this, Martin!
>
> Unfortunately it appears there was another bootstrap failure hidden
> behind that one:
>
>
> In file included from /scratch/tmp/gerald/GCC-HEAD/gcc/system.h:691,
> from /scratch/tmp/gerald/GCC-HEAD/gcc/tree-vect-slp.c:23:
> /scratch/tmp/gerald/GCC-HEAD/gcc/tree-vect-slp.c: In function
> ‘_slp_tree* vect_build_slp_tree_2(vec_info*, vec<gimple*>, unsigned int,
> poly_uint64*, vec<_slp_tree*>*, bool*, unsigned int*, unsigned int*,
> unsigned int)’:
> /scratch/tmp/gerald/GCC-HEAD/gcc/../include/libiberty.h:722:36: error:
> ‘alloca’ bound is unknown [-Werror=alloca-larger-than=]
> # define alloca(x) __builtin_alloca(x)
> ~~~~~~~~~~~~~~~~^~~
> /scratch/tmp/gerald/GCC-HEAD/gcc/../include/libiberty.h:356:33: note: in
> expansion of macro ‘alloca’
> #define XALLOCAVEC(T, N) ((T *) alloca (sizeof (T) * (N)))
> ^~~~~~
> /scratch/tmp/gerald/GCC-HEAD/gcc/tree-vect-slp.c:1437:16: note: in expansion
> of macro ‘XALLOCAVEC’
> bool *tem = XALLOCAVEC (bool, group_size);
> ^~~~~~~~~~
> cc1plus: all warnings being treated as errors
> gmake[3]: *** [Makefile:1112: tree-vect-slp.o] Error 1
> gmake[3]: Leaving directory '/scratch/tmp/gerald/OBJ-0722-0939/gcc'
> gmake[2]: *** [Makefile:4644: all-stage2-gcc] Error 2
>
>
> This is on FreeBSD 10.4 which features clang 3.4.1 as system compiler;
> FreeBSD 11.2 with clang 6.0.0 does not trigger that.
known issue: PR bootstrap/86621.
Rainer
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Rainer Orth, Center for Biotechnology, Bielefeld University
