[FFmpeg-devel] [PATCH] avcodec/proresdec: align dequantization matrix buffers

[James Almer]

On 11/16/2017 12:04 AM, James Almer wrote:
> On 11/15/2017 11:55 PM, Carl Eugen Hoyos wrote:
>> 2017-11-16 3:51 GMT+01:00 James Almer <jamrial at gmail.com>:
>>
>>> configure can't even succeed with --toolchain=hardened on mingw-w64, so
>>> looks like i wouldn't have been able to reproduce it to begin with.
>>
>> Try replacing toolchain with --extra-cflags=-fstack-protector-all:
>> $ configure --extra-cflags=-fstack-protector-all --enable-small --disable-avx
> 
> BEGIN /tmp/ffconf.pipZnMhH/test.c
>     1	int main(void){ return 0; }
> END /tmp/ffconf.pipZnMhH/test.c
> gcc -fstack-protector-all -c -o /tmp/ffconf.pipZnMhH/test.o
> /tmp/ffconf.pipZnMhH/test.c
> gcc -o /tmp/ffconf.pipZnMhH/test.exe /tmp/ffconf.pipZnMhH/test.o
> F:/msys/tmp/ffconf.pipZnMhH/test.o:test.c:(.text+0x33): undefined
> reference to `__stack_chk_fail'
> F:/msys/tmp/ffconf.pipZnMhH/test.o:test.c:(.rdata$.refptr.__stack_chk_guard[.refptr.__stack_chk_guard]+0x0):
> undefined reference to `__stack_chk_guard'
> collect2.exe: error: ld returned 1 exit status

Looks like adding --enable-ldflags=-fstack-protector-all to the above
command line makes it work.

> 
>>
>> Thank you for the useful info, I didn't know that hardened doesn't
>> work on Windows.
>>
>> Carl Eugen
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>