Re: libpq.rc make rule

On Mon, Feb 25, 2008 at 7:21 PM, Peter Eisentraut <peter_e(at)gmx(dot)net> wrote:
> The libpq.rc make rule says:
>
> # depend on Makefile.global to force rebuild on re-run of configure
> $(srcdir)/libpq.rc: libpq.rc.in $(top_builddir)/src/Makefile.global
> sed -e 's/\(VERSION.*\),0 *$$/\1,'`date '+%y%j' | sed 's/^0*//'`'/' < $< > $@
>
> However, libpq.rc is also included in the distribution, so whenever a
> distribution is built, the distributed file would be overwritten, which is
> not a nice thing to do.
>
> Could someone explain what the requirement behind this is? The '+%y%j'
> changes every day. Why is libpq the only subsystem that needs a daily
> version number?

It's used on Windows to ensure that installers can do the right thing
when replacing a copy of libpq.dll. The daily build number was the
most maintenance-free way of getting a fourth value for the version
resource.

--
Dave Page
EnterpriseDB UK: http://www.enterprisedb.com
The Oracle-compatible database company