Minor makefile bug

[Martin Sandve Alnæs]

Building libadjoint with these lines:

export PETSC_ARCH=linux-gnu-cxx-opt
export PETSC_DIR=${FENICS_UNSTABLE_DIR}
export SLEPC_DIR=${FENICS_UNSTABLE_DIR}
make install prefix=${FENICS_UNSTABLE_DIR}

where

martinal@martinal-mac:~/dev/external/libadjoint$ echo ${FENICS_UNSTABLE_DIR}
/home/martinal/opt/fenics/dorsal-unstable

The libadjoint build produces the following warning:
...
  INSTALL ///home/martinal/opt/fenics/dorsal-unstable/lib
...
gcc -pthread -fno-strict-aliasing /home/martinal/opt -fPIC -I/usr/include/python2.7 -c libadjoint/adj_python_utils.c -o build/temp.linux-x86_64-2.7/libadjoint/adj_python_utils.o
gcc: warning: /home/martinal/opt: linker input file unused because linking not done

That is, somehow half the install path was added to the gcc command for compiling adj_python_utils.c into adj_python_utils.o.

[Patrick Farrell (pefarrell)]

How strange!

adj_python_utils.c is compiled by python's distutils -- the Makefile calls setup.py, but we don't specify the compiler options.

Can you please remove the @ from the lines in the Makefile that call setup.py, and see what command is getting executed to call setup.py?

[Martin Sandve Alnæs (martinal)]

The only strange thing is the triple /, what's that for? Don't waste time on this one though, it doesn't stop the build.

  INSTALL ///home/martinal/opt/fenics/dorsal-unstable/lib/python2.7/dist-packages
cd python; python setup.py install --prefix=///home/martinal/opt/fenics/dorsal-unstable
running install
running build
running build_py
creating build
creating build/lib.linux-x86_64-2.7
creating build/lib.linux-x86_64-2.7/libadjoint
copying libadjoint/libadjoint.py -> build/lib.linux-x86_64-2.7/libadjoint
copying libadjoint/libadjoint_numpy.py -> build/lib.linux-x86_64-2.7/libadjoint
copying libadjoint/exceptions.py -> build/lib.linux-x86_64-2.7/libadjoint
copying libadjoint/clibadjoint_constants.py -> build/lib.linux-x86_64-2.7/libadjoint
copying libadjoint/__init__.py -> build/lib.linux-x86_64-2.7/libadjoint
copying libadjoint/clibadjoint.py -> build/lib.linux-x86_64-2.7/libadjoint
running build_ext
building 'libadjoint.python_utils' extension
creating build/temp.linux-x86_64-2.7
creating build/temp.linux-x86_64-2.7/libadjoint
gcc -pthread -fno-strict-aliasing /home/martinal/opt -fPIC -I/usr/include/python2.7 -c libadjoint/adj_python_utils.c -o build/temp.linux-x86_64-2.7/libadjoint/adj_python_utils.o
gcc: warning: /home/martinal/opt: linker input file unused because linking not done
gcc -pthread -shared -Wl,-O1 -Wl,-Bsymbolic-functions -Wl,-Bsymbolic-functions -Wl,-z,relro build/temp.linux-x86_64-2.7/libadjoint/adj_python_utils.o -o build/lib.linux-x86_64-2.7/libadjoint/python_utils.so