Use conda compiler toolchain for conda builds

For both libastra and astra-toolbox:

1) We do not use script_env to set CC/CXX anymore, since the compilers
   are installed by conda.
2) The build string is made useful by including either the python+numpy
   version or the cudatoolkit version that the package was built with.
3) Some clean-up of build.sh in buildenv/

For libastra:

1) The libastra.so is built with the conda C/C++ compiler
   toolchain. This has two benefits:
   1) The rpath of libastra.so is set to $ORIGIN, which makes linking
      easier for dependent packages.
   2) libastra.so is linkable against ancient versions of glibc. With
      old versions of memcpy.
2) The C/C++ compiler version is fixed to 5.4.0
3) In libastra/build.sh, we rename $CONDA_PREFIX to
   $PREFIX. Apparently, this is how it is supposed to be done. For me,
   $CONDA_PREFIX was suddenly undefined. Why this was not a problem
   before, is unclear to me.
4) The cudatoolkit runtime dependency is pinned with pin_compatible
5) The libastra conda package now provides headers and .pc file. This
   is useful for building C++ packages that depend on astra.
6) Remove some old code related to cudatoolkit<8.0.

For astra-toolbox:

1) astra-toolbox uses the conda-provided compilers
2) The compilers are fixed to version 7.3
3) Add boost to host requirements of astra-toolbox

Notes on testing:

- The libastra build has been tested with all versions of cudatoolkit
- The astra-toolbox build has been tested with all provided versions
  of python after building a single cudatoolkit version of libastra.

How to test this branch:

- It should work by just editing
  `python/conda/linux_release/buildenv/build.sh`. Set
  BRANCH=CI-use-conda-c-compiler-toolchain
  URL=https://github.com/ahendriksen/astra-toolbox

  and run release.sh from the `python/conda/linux_release` directory.

1 files changed, 10 insertions, 3 deletions

diff --git a/python/conda/linux_release/buildenv/build.sh b/python/conda/linux_release/buildenv/build.sh
index cc6dc31..158c1d5 100644..100755
--- a/python/conda/linux_release/buildenv/build.sh
+++ b/python/conda/linux_release/buildenv/build.sh
@@ -1,16 +1,23 @@
 #!/bin/sh
 
-export CC=gcc
-export CXX=g++
+set -e
+
+BRANCH=master
+URL=https://github.com/astra-toolbox/astra-toolbox
+
+echo "Cloning from ${URL}"
+echo "        branch: ${BRANCH}"
 
 cd /root
-git clone --depth 1 --branch master https://github.com/astra-toolbox/astra-toolbox
+git clone --depth 1 --branch ${BRANCH} ${URL}
+
 [ $# -eq 0 ] || perl -pi -e "s/^(\s*version:\s*)[0-9a-z+\.']+$/\${1}'$1'/" astra-toolbox/python/conda/libastra/meta.yaml astra-toolbox/python/conda/astra-toolbox/meta.yaml
 [ $# -eq 0 ] || perl -pi -e "s/^(\s*number:\s*)[0-9]+$/\${1}$2/" astra-toolbox/python/conda/libastra/meta.yaml astra-toolbox/python/conda/astra-toolbox/meta.yaml
 [ $# -eq 0 ] || perl -pi -e "s/^(\s*-\s*libastra\s*==\s*)[0-9a-z+\.]+$/\${1}$1/" astra-toolbox/python/conda/astra-toolbox/meta.yaml
 
 
 conda-build -m astra-toolbox/python/conda/libastra/linux_build_config.yaml astra-toolbox/python/conda/libastra
+
 for i in 27 35 36 37; do
   conda-build -m astra-toolbox/python/conda/astra-toolbox/conda_build_config_py$i.yaml astra-toolbox/python/conda/astra-toolbox
 done