Re: Updating databases/libpqxx

[Jan Danielsson <jan.m.danielsson%gmail.com@localhost>]

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA512

Klaus Heinz wrote:
>>    I'm having some trouble understanding where the line is drawn between
>> pkgsrc and the packages own build system. I understand that pkgsrc does
>> some preparations, then modifies the package's build system as required,
>> then kicks it off. Once it's done, it returns to pkgsrc for installation
>> or ever build target has been chosen. But how does it know which actions
>> to take? Does it always assume that it should run:
>>
>> configure --prefix=/usr/pkg
> 
> There are various stages during the build of a package. Those stages
> are listed at the top of pkgsrc/mk/bsd.pkg.mk:
[---]
> During the "configure" stage, pkgsrc has to tell the build system of
> the software, well, to "configure" itself. As you noticed, many
> software systems use the "./configure" command for this configuration.

   Many thanks for the summary! That filled a lot of gaps, though some
remain. So, essentially, there are a finite amount of build systems
which pkgsrc is aware of, and the packages need to use one of them, or
else pkgsrc needs to be extended?

[---]
> Once the configure script has finished, control returns to pkgsrc and
> eventually the dance continues in a similar but also different way for
> the next sub-target of "all", "build".
> 
> The first task in building a pkgsrc package for some software is
> determining which kind of build system it has, which knobs this
> system offers, looking whether and how pkgsrc already supports it and
> chasing down the various pkgsrc variables to control the run of that
> build system.

   Let me just state that I come from an OS/2 background, where my
projects generally had a makefile, which would do as advertised,
providing you had the appropriate compiler installed. So I'm not at all
accustomed to the "configure script" idea.

   Am I correct in assuming that the configure-scripts are a
semi-standard for build systems in Unix-systems (I don't think I've seen
a single Unix-aware build system which *doesn't* have a configure
script). Is it safe to assume that an application/library tarball will
have a configure script? Am I also correct in assuming that most
programs do in fact require patches, or tweaks, in order to build and
install properly (on NetBSD/pkgsrc)?

   Oh, while I'm at it.. What is autoconf in this context, which I see
references to sometimes?

   Are there any examples of application packages in pkgsrc which do not
use any configure-script? (apart from trivial packages which don't use
tarballs at all)



   I think I managed to track down the problem in the particular package
I'm trying to build (libpqxx 2.6.9). It seems that the installation is
performed by an install-sh script. The install-sh script in turn calls
'install' to install the individual files. The problem is that it isn't
sending the '-d' parameter to 'install', so the target directories
aren't created.

   In fact, there's something very non-intuitive - to me - going on:

   First:
- --------------------------
[---]
src=""
dst=""
dir_arg=""

while [ x"$1" != x ]; do
    case $1 in
        -c) instcmd="$cpprog"
            shift
            continue;;

        -d) dir_arg=true
            shift
            continue;;
[---]
- --------------------------

   Then, later:

- --------------------------
[---]
if [ x"$dir_arg" != x ]; then
        dst=$src
        src=""

        if [ -d $dst ]; then
                instcmd=:
                chmodcmd=""
        else
                instcmd=mkdir
        fi
else
[---]
- --------------------------

   What's this mkdir-business? Shouldn't the script simply be passing
'-d' to 'install'? Or is it a portability issue?

   See, here I'm lost. I can potentially fix this problem very easily,
by simply adding the appropriate hard coded '-d' flag to the
installation script. But is that _the_ solution? Also, if that is "the"
solution, how do I create the appropriate patch and how do I know that
it will be patched at the appropriate time?  Hmm.. I believe this is
pretty well documented in the pkgsrc guide, so I should probably read it
again.

   I'm really trying to learn this stuff, so I need to ask less, and can
patch more. :-)

- --
Kind regards,
Jan Danielsson

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.7 (NetBSD)

iD8DBQFGVQFxuPlHKFfKXTYRCkh9AJ9wQnKBEMzDQXOAd9Pq2Xb1IOH88gCdE1bg
TSAzOfFI4Zp9yKMAjYmRjak=
=KmgB
-----END PGP SIGNATURE-----