On 8/21/14 5:12 AM, Fabien COELHO wrote:
> Also, a general comment, which is independent of this patch: I found the
> documentation build especially not resilient, with a lack of clear error
> messages when something is broken. Basically, if configure does not
> found something for the doc (openjade, osx, xmllint, ...) it does not
> complain. That is fine with me, people would not always want to build
> the doc anyway as it is available online. However, the Makefile in
> doc/src/sgml overrides the not found commands (ifndef JADE JADE=...,
> etc), and proceed to unhelpful and unclear errors later on. ISTM that it
> may be more helful to do:
> 
>   ifndef JADE
>   #error "no jade found on your system, cannot generate the documention"
>   endif

We could use $(missing) for that, which is already used for bison, flex,
and perl.


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