# cabal/cfg - "Build" settings for package

#---------------------------------------------------------------------

[technotes]

1. The  source tarballs and/or  components for this package are retri-
eved from online during the first build, stored in the package itself,
and  reused in  subsequent builds.  The rules related to  going online
again are explained  further down.

This is  one of a  limited number of  packages in this distro  that is
permitted to go online at build time.

#---------------------------------------------------------------------

2. The "cabal" package provides a copy of the Haskell "cabal" executa-
ble.

The  package needs existing copies of the "cabal" executable and "ghc"
compiler to  build itself  [including an  updated copy of  the "cabal"
executable].

The  build procedure uses the first copies of "cabal" and  "ghc" found
in  the PATH list or the copies in the  "cabal" and/or "ghc0910" pack-
ages, whatever is available.  The copies in the PATH list take priori-
ty.

#---------------------------------------------------------------------

3. It's recommended that the "cabal" package be backed up prior to any
rebuild.

The  "cabal" and "ghc0910" packages  are relocatable.  This means that
the developer should be able to do something like this:

      cd $PRODTREE
      rm -fr         boot-cabal
      cp -a cabal/   boot-cabal

      rm -fr         boot-ghc0910
      cp -a ghc0910/ boot-ghc0910

      PATH=$PRODTREE/boot-cabal/bin:$PATH
      PATH=$PRODTREE/boot-ghc0910/bin:$PATH

to create copies of the packages that can be used  both as backups and
to rebuild the packages.

#---------------------------------------------------------------------

4. If  the  environment variable  "GHCOFFLINE" is  set to "true" -- or
to certain aliases for "true" such as "yes" -- the  "cabal" build pro-
cedure doesn't go online.  Instead,  the package rebuilds itself using
sources that existed,  and were saved,  at the time of the last online
build.

In  this case,  the "cabal" and "ghc" executables used to do the build
need to be compatible with the old sources.

Presently, in this mode, the build procedure turns "dnsmasq" off auto-
matically.

#---------------------------------------------------------------------

5. If "GHCOFFLINE" is set to something else,  or is unset, the "cabal"
build procedure goes  online.  It downloads  new "cabal" sources, uses
them, and stores them in the package itself.

In  this case,  the "cabal" and "ghc" executables used to do the build
need to be compatible with the latest upstream sources.

Presently, in this mode, the build procedure turns "dnsmasq" on  auto-
matically.

#---------------------------------------------------------------------

[buildtimes]

00.51 hours (or 030.83 minutes) - ThinkPad  W530  i7  4x2  32GB  RAM -
                                  250526

#---------------------------------------------------------------------

[settings]
compiler  = gcc                 # ghc 9.10 doesn't support newer clang
configure = none
defer     = glibc64
license   = tbd
purge     = no
unpack    = none

setpaths  = libgmp

#---------------------------------------------------------------------

[depends]
cabal:forward                   # Package may need itself to build
ghc0910:forward
libgmp
numactl
zlib

#---------------------------------------------------------------------

[build]
PATH=$PATH:$PRODTREE/cabal/bin:$PRODTREE/ghc0910/bin

export LD=ld
hash cabal && hash ghc
cabal --version
ghc   --version

PP=$PRODTREE/cabal
BINDIR=$PP/bin
GHCHOME=$PP/ghchome
BUILDBIN=$GHCHOME/.local/bin

mkdir -p $BINDIR $GHCHOME
OLDHOME=$HOME
export HOME=$GHCHOME

#---------------------------------------------------------------------

rm -fr   $BINDIR/*

rm -fr   $BUILDBIN/
rm -fr   $GHCHOME/.local/state/

mkdir -p $BUILDBIN/
mkdir -p $GHCHOME/.local/state/

#---------------------------------------------------------------------

if [ "@$GHCOFFLINE" == "@1"    ]; then GHCOFFLINE=true    ; fi
if [ "@$GHCOFFLINE" == "@on"   ]; then GHCOFFLINE=true    ; fi
if [ "@$GHCOFFLINE" == "@yes"  ]; then GHCOFFLINE=true    ; fi

echo GHCOFFLINE=$GHCOFFLINE

if [ "@$GHCOFFLINE" == "@true" ]; then
    echo Building offline
    killany dnsmasq || true
else
    echo Building online
    service dnsmasq start || true
    cabal update
fi

#---------------------------------------------------------------------

PKGLIST="
cabal-install
"

#---------------------------------------------------------------------

for pkg in $PKGLIST
do
    echo ==== `date` $pkg start
    echo cabal --installdir=$BUILDBIN/ \
               --overwrite-policy=always install $pkg

         cabal --installdir=$BUILDBIN/ \
               --overwrite-policy=always install $pkg

    echo ==== `date` $pkg end
done

#---------------------------------------------------------------------

cp -p $BUILDBIN/* $BINDIR/
strip             $BINDIR/* || true
HOME=$OLDHOME

#---------------------------------------------------------------------

# Original URLs. These URLs were valid at one point, but may have died
# since then. If you download newer versions of tarballs [etc.], don't
# delete  the  original versions,  as you may not  be able  to replace
# them.

[urls]
url_debian  = tbd
url_home    = tbd
url_lfs     = tbd
url_tarball = n/a               # See "technotes" in "cfg" file

#---------------------------------------------------------------------

[history]
250526 Added package
250526 Started with 250526