Re: [Nasm-devel] building outside the source directory

[Ruslan K. <b7....@gm...>]

Hi Ed,

On Wed, 29 Aug 2018 at 05:34, Ed Beroset <be...@mi...> wrote:
>
> On 08/28/2018 03:24 PM, Cyrill Gorcunov wrote:
> > On Tue, Aug 28, 2018 at 01:52:43PM -0400, Ed Beroset wrote:
> >> Today, for the first time in a long time, I refreshed my local copy of the
> >> NASM repo and tried to do a built outside the source directory, as is my
> >> usual practice.  It failed.
> >>
> >> Specifically, if you clone the source into a fresh new directory "nasm" and
> >> then create and navigate into "nasm/build" I would expect the following
> >> steps to successfully do a build:
> >>
> >> autoreconf .. -i
> >> ../configure
> >> make
> >>
> >> However it fails because of the generated file pptok.sh
> >>
> >> I believe I can fix this, but before I expend the effort to do so, I wanted
> >> ask some questions:
> >>
> >> 1. can you reproduce this problem?
> >> 2. do you agree it should be fixed?
> >>
> >> Thanks.
> >
> > Hi Ed! Why did you enter nasm/build? Usually I personally run ./autogen.sh
> > from root source directory. Would it work for you?
>
> Hi Cyrill,
>
> Yes, it works from the root source directory, but only from there.  One
> of the features of autotools is that it's supposed to allow one to run
> "configure" from anywhere and build successfully.  One reason for doing
> that is that it keeps the source tree (mostly) free of build artifacts.

You seem to confuse "configure" script and autogen.sh/autoreconf. The
former indeed should work correctly regardless of $PWD. But the latter
ones actually create the configure script, and normally it's
distributed in the source release tarball, already generated (unlike
git repo). So I don't think autoreconf is something one needs to work
from outside the source tree. The workflow should be something like:

autoreconf -i # NOTE: once!
cd /path/to/build/dir
/source/dir/configure --options...
make
cd /path/to/another/build/dir
/source/dir/configure --other-options...
make

>
> Another common use of this feature is to create both release and debug
> versions (in two separate locations) from the same source.  See
> https://www.gnu.org/software/automake/manual/html_node/VPATH-Builds.html
> for example.
>
> Ed
>
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