[PATCH] manual: skip build when perl is unavailable

[Mike Frysinger]

On 21 Aug 2015 21:58, Dmitry V. Levin wrote:
> On Fri, Aug 21, 2015 at 08:50:29PM +0200, Florian Weimer wrote:
> > On 08/21/2015 07:17 PM, Mike Frysinger wrote:
> > > Do not try to generate the manual when perl is unavailable.  This
> > > matches the behavior when makeinfo is unavailable.  Otherwise the
> > > install step fails when trying to generate the libm section since
> > > it runs a perl script.
> > 
> > Isn't this redundant with the makeinfo check because makeinfo is written
> > in Perl?
> 
> Not so long ago makeinfo used to be an ELF executable.

right -- the perl rewrite is new to the latest versions (5.0+), and the
configure script doesn't require those.  so an alternative would be to
stop accepting makeinfo 4.x.
-mike
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