It seems that added support of linux/alpha to
hw/xfree86/os-support/linux/Makefile.am has some errors.

The following:
if LINUX_ALPHA
PLATFORM_PCI_SUPPORT = lnx_ev56.c
       $(srcdir)/lnx_axp.c
       $(srcdir)/../shared/xf86Axp.c
endif

should be added as:
if LINUX_ALPHA
PLATFORM_PCI_SUPPORT = lnx_ev56.c \
       $(srcdir)/lnx_axp.c \
       $(srcdir)/../shared/xf86Axp.c
endif

Another thing: the lnx_axp.c tries to include xf86Axp.h which located in
"../shared" directory, but I don't see that path added as include directory for
a compiler.

Thank you,