[Mono-dev] Building from Source Fails with mcs: Command not found (Mono-devel-list Digest, Vol 121, Issue 19) (Mono-devel-list Digest, Vol 121, Issue 20)

[Cyd Haselton]

On May 22, 2015 7:34:16 AM CDT, Jo Shields <directhex at apebox.org> wrote:
>
>
>On 22/05/15 01:16, cyd wrote:
>> Let me back up a few steps before I start troublehooting this.
>>
>> Does the monolite build of mono 4.0 support ARM...specifically ARMv7?
> If
>> so, are there any modifications I need to make before running 'make
>&& make
>> install?'
>
>Monolite is CPU-agnostic. It's just bytecode. Mono 4 supports ARMv7, so
>the question is what instructions are triggering SIGILL
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Running 'strace -v -o mono.log make check', then 'cat mono.log | grep -B 12 SIGILL' yields:

mprotect(0x40085000, 4096, PROT_READ)   = 0
getrlimit(RLIMIT_STACK, {rlim_cur=8192*1024, rlim_max=RLIM_INFINITY}) = 0
gettid()                                = 10243
syscall_983045(0x40086f24, 0xffffffb8, 0, 0x40086f24, 0x40087154, 0, 0xbeaec0d0, 0xf0005, 0x4008715c, 0xbe2ed000, 0, 0, 0, 0xbeaec070, 0x4007e254, 0x4007eaa4, 0x60000010, 0x40086f24, 0, 0, 0xc764, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0) = 0
mmap2(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0) = 0x40089000madvise(0x40089000, 8192, 0xc /* MADV_??? */) = -1 EINVAL (Invalid argument)
sigaltstack({ss_sp=0x40089000, ss_flags=0, ss_size=8192}, NULL) = 0
sigaction(SIGABRT, {0x40076a71, [], SA_STACK|SA_RESTART|SA_SIGINFO}, NULL, 0x1dd9028) = 0
sigaction(SIGBUS, {0x40076a71, [], SA_STACK|SA_RESTART|SA_SIGINFO}, NULL, 0x1dd9028) = 0
sigaction(SIGFPE, {0x40076a71, [], SA_STACK|SA_RESTART|SA_SIGINFO}, NULL, 0x1dd9028) = 0
sigaction(SIGILL, {0x40076a71, [], SA_STACK|SA_RESTART|SA_SIGINFO}, NULL, 0x1dd9028) = 0

I have zero experience reading straces but if I had to guess it looks like a function is making an invalid memory call. 
-- 
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