Makefiles now honor symvers file locations if they are already specified in the environment.
This could cause problems if variables are unkowingly left defined.
A better option would be to override the variables on the command line
Variable names are changed to make it easier to derive them from module names.

Setting epics/util/Makefile.in to custom output dir and regenerating configure script for it, don't copy files that can cause race condition

 * work towards #335
 * modify find_module_symvers to user argparser and have a quiet option to make missing symvers files empty strings
 * update the src/epics/util/Makefile.in to pass the location of the rts cpu isolator symver file to feCodeGen.pl
 * update createKernelMakefile.pm to add the rts cpu isolator symvers file to the KBUILD_EXTRA_SYMBOLS for the module

Jameson Rollins authored 5 years ago and Rolf Bork committed 5 years ago

This makes discovery of the Module.symvers happen at model build time,
instead of at build tree creation/configuration.

A find_module_symvers script is included to find the Module.symvers
file, and it's used in the RCG Makefile to find module symvers files
at build time.

This reverts the top-level configure script changes from
8c01de98, restoring the configure
script and dropping the autoconf-generated configure step from the
build setup.

Closes #14 - Restore support for kernel module versioning
patches/kernel-4.19-cs/config-4.19.67-cs - change to MODVERSIONS=y
patches/kernel-4.19-cs/README - Update note on config file
-- changes for mbuf, gpstime symbol versions --
Update RCG autotools - remove configure, move configure.in to configure.ac
bootstrap - add to generate configure from configure.ac
configure.ac - rename from configure.in, add tests to find path to mbuf, gpstime
Module.symvers files - either /var/lib/dkms/$MODNAME/$MODVERS/$KVERS/$ARCH/
for DKMS package or /var/cache/$MODNAME from local build
src/drv/ExtraSymbols.symvers - Remove mbuf, gpstime symbols
src/drv/gpstime/Makefile - Add caching of Module.symvers in /var/cache/gpstime on install
src/drv/mbuf/Makefile - Add caching of Module.symvers in /var/cache/mbuf on install
src/epics/util/Makefile.in  - Add mbuf,gpstime Module.symvers paths
src/epics/util/feCodeGen.pl - Add KBUILD_EXTRA_SYMBOLS statements to front-end make file
-- changes to front-end kernel module symbol versions --
src/drv/ExtraSymbols.symvers - Remove need_to_load_IOP_first
src/epics/util/Makefile.in - Add caching of need_to_load_IOP_first symbol version, copy of cache for builds
src/epics/util/feCodeGen.pl - Add KBUILD_EXTRA_SYMBOLS for this

git-svn-id: https://redoubt.ligo-wa.caltech.edu/svn/advLigoRTS/trunk@2879 6dcd42c9-f523-4c6d-aada-af552506706e

git-svn-id: https://redoubt.ligo-wa.caltech.edu/svn/advLigoRTS/trunk@2600 6dcd42c9-f523-4c6d-aada-af552506706e

directory, like ../trunk and not /opt/rcg, for instance.


git-svn-id: https://redoubt.ligo-wa.caltech.edu/svn/advLigoRTS/trunk@2548 6dcd42c9-f523-4c6d-aada-af552506706e