# ghc0865/cfg - "Build" settings for package
#---------------------------------------------------------------------
[technotes]
1. "ghc" upstream releases subsequent to 8.6.5 largely broke the abil-
ity for distro maintainers to build "cabal".
Proposed solutions included, for example, keeping two copies of "ghc"
around and using the older one (8.6.5) to build "cabal". As of Win-
ter 2021, the issue remained.
Until the issue is corrected, "ghc086" should be locked at release
8.6.5.
"cabal" should be locked at releases 2.4.0.0 and 3.4.0.0.
Note: This distro provides both of those two "cabal" releases. The
package "cabal2400" builds release 2.4.0.0 and the package "cabal"
builds 3.4.0.0.
#---------------------------------------------------------------------
2. This package,"ghc0865", builds and installs the core of the sys-
tem's Haskell environment.
If "cabal" 3.4.0.0 is built subsequently, the result is a Haskell en-
vironment that's complete enough to build "pandoc" (which is, in fact,
built by the package "haskell-packages").
#---------------------------------------------------------------------
3. "ghc0865" is a tricky package from a "build" standpoint.
3.1. The package requires a compatible copy of itself to build.
Additionally, the package isn't relocatable in the sense of director-
ies being movable.
I.e., a bootstrap copy can't be kept in the package resource tree and
unpacked in a temporary tree at "build" time.
#---------------------------------------------------------------------
3.2. One approach that can be used to rebuild "ghc0865" is to use the
package to rebuild itself in-place.
#---------------------------------------------------------------------
3.3. That approach isn't ideal because it leaves possibly obsolete
files in place. This issue can be addressed as follows:
(a) Delete the existing "$PRODTREE/ghc0865/" directory tree
(b) Replace it with a copy that was backed up immediately after
the most recent complete build
(c) Execute: makelac ghc0865 --force
A backed-up copy [or copies] suitable for use in step (b) above is/are
provided in the following tarball[s]:
special/ghc0865-prebuilt*.tar.bz2
Note: The pathname indicated above is relative to the directory that
contains this "cfg" file.
#---------------------------------------------------------------------
3.4. Another approach is as follows. This approach produces an entire-
ly new tree that is guaranteed to be clean. However, it's more compli-
cated and riskier. So, the approach discussed in part 3.3 above may be
preferable.
Important: Back-up "$PRODTREE/ghc0865/" first.
Rename the directory tree "/src/0*/*_ghc0865/" to the corresponding
"/src/0*/*_ghcboot/" pathname temporarily.
rm -fr $PRODTREE/ghcboot/
makelac ghcboot --force
Rename the directory tree "/src/0*/*_ghcboot/" back to the correspond-
ing "/src/0*/*_ghc0865/" pathname.
rm -fr $PRODTREE/ghc0865/
USEGHCBOOT=yes makelac ghc0865 --force
rm -fr $PRODTREE/ghcboot/
#---------------------------------------------------------------------
4. Historical note:
It's nearly impossible to bootstrap "ghc0865" using prebuilt binaries
obtained from upstream and/or from another distro.
We used roughly the following procedure to bootstrap this package. It
probably wouldn't be possible to reproduce these steps today.
* Obtain third-party binaries for the "ghc" package
* Install them where they expect to be installed
* Append an entry of the form ":/some-directory" to the environment
variable "LD_LIBRARY_PATH". In the specified directory, put copies
of any dynamic libraries that the third-party binaries require and
the distro doesn't provide.
* Execute: export LD_LIBRARY_PATH
* Set "purge = yes" for the "ghc0865" package
* Build the "ghc0865" package using the third-party binaries
* Set "purge = no" for the "ghc0865" package
* Remove the third-party binaries installed (this part was tricky)
* Rebuild the "ghc0865" package using the new native binaries
#---------------------------------------------------------------------
[buildtimes]
00.64 hours (or 038.37 minutes) - 2021 L.A. dedi box: 6x2 CPU 32GB RAM
00.68 hours (or 040.73 minutes) - 2023 dedi Xeon E3-1200 v3 4x2 32GB
RAM
00.91 hours (or 054.85 minutes) - 2021 Utah dedi box: 4x2 CPU 32GB RAM
00.92 hours (or 055.48 minutes) - ThinkPad W530 i7 4x2 32GB RAM
01.10 hours (or 066.22 minutes) - HP EliteBook 8560w 32GB RAM
#---------------------------------------------------------------------
[settings]
altpkg = yes
defer = glibc64
license = See "license*.txt" in installed tree
licfile = LICENSE
nosyslinks = yes
nowerror = true
purge = no
strip = no
tmpsize = 3746M
unpack = relaxed
setpaths = gcc ghc0865 libffi libgmp ncurses numactl zlib
#---------------------------------------------------------------------
[depends]
actools
gawk
grep
libffi
libgmp
ncurses
numactl
sed
zlib
#---------------------------------------------------------------------
[configure]
TMPHOME=/tmp/home
rm -fr $TMPHOME
mkdir $TMPHOME
export HOME=$TMPHOME
rm -fr $HOME/.cabal
rm -fr $HOME/.ghc
export LD=`which ld`
sed -e 's@^\(LD_STAGE[0-9]\).*=.*@\1=/bin/ld@' \
-i mk/config.mk.in
MANBASE=$PKGDIR_PROD/man
mkdir -p $MANBASE
if [ "@$USEGHCBOOT" == "@1" ]; then USEGHCBOOT=true; fi
if [ "@$USEGHCBOOT" == "@yes" ]; then USEGHCBOOT=true; fi
if [ "@$USEGHCBOOT" == "@true" ]; then
PATH=$PATH:$PRODTREE/ghcboot/bin
fi
bash ./configure \
--prefix=$PKGDIR_PROD \
--build=$LACARCHBUILD \
--host=$LACARCHHOST \
--disable-dependency-tracking \
--disable-ld-override \
--enable-shared=yes \
--enable-static=no \
--mandir=$MANBASE \
--with-system-libffi
#---------------------------------------------------------------------
[build]
PATH=`pwd`:$PATH
export LD=`which ld`
if [ "@$USEGHCBOOT" == "@1" ]; then USEGHCBOOT=true; fi
if [ "@$USEGHCBOOT" == "@yes" ]; then USEGHCBOOT=true; fi
if [ "@$USEGHCBOOT" == "@true" ]; then
PATH=$PATH:$PRODTREE/ghcboot/bin
fi
smpmake || smpmake || make
make install || make install
#---------------------------------------------------------------------
# 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 = https://downloads.haskell.org/~ghc/\
8.6.5/ghc-8.6.5-src.tar.xz
#---------------------------------------------------------------------
[history]
180318 Added package. Started with 8.2.2.
181010 Updated to 8.6.1
191020 Updated to 8.6.5
210205 Restructured distro Haskell packages
240407 Rebuilt using "ghcboot" option