Some other compilers turn too many warnings into errors with this flag.

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it does not ignore coefficient value = 256.
Patch by Maxim ((!min)_pole \at gmx dot/ de)



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Older versions accepted both with and without an '=', but newer versions
require the '=' to be omitted

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Fixes build with clang

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unfinished, iam just commiting this so the functions that should be
non static have prototypes.


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Turning on -Werror=implicit makes implicit function declarations
an error with supported compilers.

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Also fix function definitions to match prototypes (missing const).

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These functions are not used outside their respective files, and they
lack a prototype in a header.

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non-interlaced video.
Should fix issue 1766.


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av_stristr().

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This is a case-insensitive version of strstr().

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simplify.

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This gives brief messages from make by default.  For full command
echoing, add V=1 to make command line.

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