EPICS INSTALL_LOCATION/FINAL_LOCATION doesn't work?

["J. Lewis Muir via Tech-talk" <tech-talk at aps.anl.gov>]

Hi, Tech-Talkers!

On RHEL 7 (linux-x86_64), using the DESTDIR-like build behavior
of EPICS 7.0.8.1 by setting INSTALL_LOCATION, FINAL_LOCATION, and
LINKER_USE_RPATH doesn't seem to work.  Is this broken, or am I doing
something wrong?

I did the following:

====
$ mkdir /tmp/45
$ cd /tmp/45
$ mkdir distfiles opt src work
$ cd distfiles
$ curl -OL https://epics.anl.gov/download/base/base-7.0.8.1.tar.gz
$ cd ../src
$ tar xzf ../distfiles/base-7.0.8.1.tar.gz
$ cd base-7.0.8.1
$ vi configure/CONFIG_SITE
----
INSTALL_LOCATION=/tmp/45/work
FINAL_LOCATION=/tmp/45/opt/epics-7.0.8.1
LINKER_USE_RPATH=NO
----
$ export EPICS_HOST_ARCH=linux-x86_64
$ export PATH="/tmp/45/work/bin/$EPICS_HOST_ARCH:$PATH"
$ export LD_LIBRARY_PATH=/tmp/45/work/lib/$EPICS_HOST_ARCH
$ make
====

After the build completes, /tmp/45/opt is empty; that's as expected
since that's the final location, and it's up to me to move them into
their final location, potentially on a different machine.

In /tmp/45/work, all the installed files are there; that's as expected
also.  But unfortunately, the RPATH information is wrong.  For example,
caget doesn't have correct RPATH entries for libca nor libCom:

====
$ ldd /tmp/45/work/bin/linux-x86_64/caget
        linux-vdso.so.1 =>  (0x00007fff0d2b8000)
        libca.so.4.14.4 => not found
        libCom.so.3.23.1 => not found
        libstdc++.so.6 => /lib64/libstdc++.so.6 (0x00007fa226e61000)
        libm.so.6 => /lib64/libm.so.6 (0x00007fa226b5f000)
        libgcc_s.so.1 => /lib64/libgcc_s.so.1 (0x00007fa226949000)
        libc.so.6 => /lib64/libc.so.6 (0x00007fa22657b000)
        /lib64/ld-linux-x86-64.so.2 (0x00007fa227169000)
====

And libca doesn't have a correct RPATH entry for libCom:

====
$ ldd /tmp/45/work/lib/linux-x86_64/libca.so
        linux-vdso.so.1 =>  (0x00007ffd80bd2000)
        libCom.so.3.23.1 => not found
        libpthread.so.0 => /lib64/libpthread.so.0 (0x00007fb2bd6a2000)
        libreadline.so.6 => /lib64/libreadline.so.6 (0x00007fb2bd45c000)
        librt.so.1 => /lib64/librt.so.1 (0x00007fb2bd254000)
        libdl.so.2 => /lib64/libdl.so.2 (0x00007fb2bd050000)
        libstdc++.so.6 => /lib64/libstdc++.so.6 (0x00007fb2bcd48000)
        libm.so.6 => /lib64/libm.so.6 (0x00007fb2bca46000)
        libgcc_s.so.1 => /lib64/libgcc_s.so.1 (0x00007fb2bc830000)
        libc.so.6 => /lib64/libc.so.6 (0x00007fb2bc462000)
        /lib64/ld-linux-x86-64.so.2 (0x00007fb2bdb28000)
        libtinfo.so.5 => /lib64/libtinfo.so.5 (0x00007fb2bc238000)
====

Wondering whether setting LINKER_USE_RPATH=NO above was the wrong
thing to do, I tried again as above but with LINKER_USE_RPATH=YES in
CONFIG_SITE.  Unfortunately, that also results in broken RPATH entries,
but different.  For example, caget's RPATH entries for libca and libCom
are both under INSTALL_LOCATION (/tmp/45/work), which is wrong; they
should be under FINAL_LOCATION (/tmp/45/opt/epics-7.0.8.1):

====
$ ldd /tmp/45/work/bin/linux-x86_64/caget
        linux-vdso.so.1 =>  (0x00007ffff5ffd000)
        libca.so.4.14.4 => /tmp/45/work/lib/linux-x86_64/libca.so.4.14.4 (0x00007f6356d92000)
        libCom.so.3.23.1 => /tmp/45/work/lib/linux-x86_64/libCom.so.3.23.1 (0x00007f6356b15000)
        libstdc++.so.6 => /lib64/libstdc++.so.6 (0x00007f635680d000)
        libm.so.6 => /lib64/libm.so.6 (0x00007f635650b000)
        libgcc_s.so.1 => /lib64/libgcc_s.so.1 (0x00007f63562f5000)
        libc.so.6 => /lib64/libc.so.6 (0x00007f6355f27000)
        libpthread.so.0 => /lib64/libpthread.so.0 (0x00007f6355d0b000)
        libreadline.so.6 => /lib64/libreadline.so.6 (0x00007f6355ac5000)
        librt.so.1 => /lib64/librt.so.1 (0x00007f63558bd000)
        libdl.so.2 => /lib64/libdl.so.2 (0x00007f63556b9000)
        /lib64/ld-linux-x86-64.so.2 (0x00007f6356ffc000)
        libtinfo.so.5 => /lib64/libtinfo.so.5 (0x00007f635548f000)
====

And libca's RPATH entry for libCom is similarly under INSTALL_LOCATION
(/tmp/45/work), which is wrong; it should be under FINAL_LOCATION
(/tmp/45/opt/epics-7.0.8.1):

====
$ ldd /tmp/45/work/lib/linux-x86_64/libca.so
        linux-vdso.so.1 =>  (0x00007ffce6921000)
        libCom.so.3.23.1 => /tmp/45/work/lib/linux-x86_64/libCom.so.3.23.1 (0x00007fc58b491000)
        libpthread.so.0 => /lib64/libpthread.so.0 (0x00007fc58b275000)
        libreadline.so.6 => /lib64/libreadline.so.6 (0x00007fc58b02f000)
        librt.so.1 => /lib64/librt.so.1 (0x00007fc58ae27000)
        libdl.so.2 => /lib64/libdl.so.2 (0x00007fc58ac23000)
        libstdc++.so.6 => /lib64/libstdc++.so.6 (0x00007fc58a91b000)
        libm.so.6 => /lib64/libm.so.6 (0x00007fc58a619000)
        libgcc_s.so.1 => /lib64/libgcc_s.so.1 (0x00007fc58a403000)
        libc.so.6 => /lib64/libc.so.6 (0x00007fc58a035000)
        /lib64/ld-linux-x86-64.so.2 (0x00007fc58b978000)
        libtinfo.so.5 => /lib64/libtinfo.so.5 (0x00007fc589e0b000)
====

Thanks!

Lewis