Re: [EPICS] Support for Staged Installs ?

[Michael Davidsaver <mdavidsaver@bnl.gov>]

On 10/05/2014 09:08 AM, Ralph Lange wrote:

...
Pavel,

I don't know what kind of build system you are using, but setting INSTALL_LOCATION inside a make based build of a standard EPICS application does exactly what you describe. It builds locally and installs into the selected location (instead of TOP).

The EPICS makefiles don't allow the full generality of autoconf/automake, but they come close.

The rough equivalent of

$ ./configure --prefix=/usr/local/epics
$ make install DESTDIR=/tmp/builddir

Would be

$ make FINAL_LOCATION=/usr/local/epics INSTALL_LOCATION=/tmp/builddir LINKER_USE_RPATH=NO

The LINKER_USE_RPATH=NO is necessary as rpath is always set using INSTALL_LOCATION.  So unlike auto* it will be necessary for users to set LD_LIBRARY_PATH.  Alternately you can adjust the runtime linker config[3], or use an ELF file editor[1] to set rpath yourself.

I use this recipe (almost) when building debian linux packages[2].  I don't bother with INSTALL_LOCATION since I already have to pick which files to include in the installable package.  It can be helpful if you're looking to quickly tar the result.

[1] http://nixos.org/patchelf.html

[2] https://github.com/epicsdeb/epics-base/blob/master/debian/rules

[3] cf. /etc/ld.so.conf