[CMake] libtool: link: only absolute run-paths are allowed

[Josh Stratton]

I've using cmake to build an autoconf portion of the project using
ExternalProject_Add.  I tried using the autoconf prefix, but was having
issues with the libtool and absolute paths.  I found DCMAKE_INSTALL_PREFIX
in the docs, which seems to avoid the libtool problem, but I'm getting
errors saying I don't have permissions writing files to /usr/local/include.
 Why would it be trying to write files there?

Making install in api
 /bin/mkdir -p '/usr/local/include'
 /usr/bin/install -c -m 644
/home/stratton/Public/ppml/external/fftw-3.3.3/api/fftw3.h
/home/stratton/Public/ppml/external/fftw-3.3.3/api/fftw3.f
/home/stratton/Public/ppml/external/fftw-3.3.3/api/fftw3l.f03
/home/stratton/Public/ppml/external/fftw-3.3.3/api/fftw3q.f03
'/usr/local/include'
/usr/bin/install: cannot create regular file '/usr/local/include/fftw3.h':
Permission denied
/usr/bin/install: cannot create regular file '/usr/local/include/fftw3.f':
Permission denied
/usr/bin/install: cannot create regular file
'/usr/local/include/fftw3l.f03': Permission denied
/usr/bin/install: cannot create regular file
'/usr/local/include/fftw3q.f03': Permission denied
make[6]: *** [install-includeHEADERS] Error 1
make[5]: *** [install-am] Error 2
make[4]: *** [install] Error 2
make[3]: *** [install-recursive] Error 1
make[2]: *** [fftw-prefix/src/fftw-stamp/fftw-install] Error 2
make[1]: *** [CMakeFiles/fftw.dir/all] Error 2
make: *** [all] Error 2

*** And part of my cmake file...

SET(DEPLOY_DIR /tmp/foo)

ExternalProject_Add(
  fftw
  SOURCE_DIR /home/stratton/Public/ppml/external/fftw-3.3.3
  CONFIGURE_COMMAND <SOURCE_DIR>/configure ${CONFIGURE_PARALLEL_FLAG}
  CMAKE_ARGS -DCMAKE_INSTALL_PREFIX:
    PATH=$DEPLOY_DIR/FFTW
  BUILD_COMMAND make
)
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