[Xen-devel] Usage of DEBUG_DIR breaks OVMF build

[Olaf Hering <olaf@xxxxxxxxx>]

The default DEBUG_DIR=/usr/lib/debug can not be used for rpm builds
because that directory is "owned" by rpm-packaging itself to store the
autogenerated ${pkg}-debuginfo.rpm data. Thats why I set it to /boot.
This worked fine until recently, only /boot/xen-syms was affected by
that change, and in fact only the "xen" build needed DEBUG_DIR as make
cmdline option.

Now tools/firmware/Makefile also uses DEBUG_DIR. To set DEBUG_DIR the
tools build must be done like "make DEBUG_DIR=/my/dir". But this breaks
build with --enable-ovmf because ovmf.git makes use of the very same
variable. For some reason it can not deal with a custom value, some
autogenerated file will not be found:

[  126s] make[8]: *** No rule to make target '/boot/AutoGen.h', needed by 
'/home/abuild/rpmbuild/BUILD/xen-4.11.20180228T150620.cb671efbf1/non-dbg/tools/firmware/ovmf-dir-remote/Build/OvmfX64/DEBUG_GCC5/X64/OvmfPkg/ResetVector/ResetVector/OUTPUT/ResetVector.bin'.

I think the only option to support rpm packaging is to rename DEBUG_DIR to
XEN_DEBUG_DIR. Any objections to that?

Olaf

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