Re: [PATCH] imap-send.c: fix pointer to be const

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Junio C Hamano <gitster@xxxxxxxxx> writes:

> Vietor Liu <vietor@xxxxxxxx> writes:
>
>> Fixes some compiler warnings:
>> imap-send.c: In function ‘ssl_socket_connect’:
>> warning: assignment discards qualifiers from pointer target type
>>
>> ====================================================
>> OpenSSL Changes between 0.9.8k and 1.0:
>>
>> *) Let the TLSv1_method() etc. functions return a 'const' SSL_METHOD
>>      pointer and make the SSL_METHOD parameter in SSL_CTX_new,
>>      SSL_CTX_set_ssl_version and SSL_set_ssl_method 'const'.
>>
>> Signed-off-by: Vietor Liu <vietor@xxxxxxxx>
>
> This is much easier to understand.

This indeed _is_ easier to understand, but what this means is that making
"meth" const will break the compilation for people with 0.9.8k.

Their SSL_CTX_new() does not promise the callers that it won't modify the
object its parameter points at, so SSL_CTX_new(meth) will now see exactly
the same issue.  You will be discarding "const" qualifier by passing it.


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