[Dovecot] dovecot pam const

[Timo Sirainen]

On 15.4.2007, at 7.36, Frank Cusack wrote:

> In passdb-pam.c, I found some bits about const with some PAM data  
> types.
> Rather than check for each vendor of PAM, better to check for actual
> const usage ... some vendors have changed const-ness between releases.
> Also, actually testing constness is great for supporting new
> implementations that may come out.
>
> Here is the autoconf test I use in pam_otp_auth:
>
> --8<--
> # Check PAM headers for brokenness
> otp_CFLAGS="$CFLAGS"    # save
> CFLAGS="$CFLAGS $EXTRA_CFLAGS -Werror"

Otherwise I agree, but this relies on gcc-specific -Werror flag,  
which I'd rather not do. At least it would need some generic fallback  
mechanism..
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