Re: a couple of compiler warnings with gcc 11 on freetype 2.10.4

[Alan Coopersmith]

On 7/4/21 1:24 PM, Hin-Tak Leung via FreeType development wrote:
> Hi Werner,
>
> There are two new warnings from building 2.10.4 on current fedora. One is 
> likely from the newer gcc 11:
>
>
> src/base/ftlcdfil.c:360:42: warning: argument 2 of type ‘FT_Vector *’ {aka 
> ‘struct FT_Vector_ *’} declared as a pointer [-Warray-parameter=]
>    360 |                              FT_Vector*  sub )
>        |                              ~~~~~~~~~~~~^~~
> include/freetype/ftlcdfil.h:314:42: note: previously declared as an array 
> ‘FT_Vector[3]’ {aka ‘struct FT_Vector_[3]’}
>    314 |                              FT_Vector   sub[3] );
>        |                              ~~~~~~~~~~~~^~~~~~


gcc 11 has started doing more checks when functions are defined as taking
arrays of a given length, which may help catch more buffer overflows:

https://developers.redhat.com/articles/2021/06/25/use-source-level-annotations-help-gcc-detect-buffer-overflows#array_function_parameters

--
        -Alan Coopersmith-               alan.coopersmith@oracle.com
         Oracle Solaris Engineering - https://blogs.oracle.com/alanc