The XML representation of the illumos system calls is generated in ../build.sh

diff -wpruN '--exclude=*.orig' a~/gdb/data-directory/Makefile.in a/gdb/data-directory/Makefile.in
--- a~/gdb/data-directory/Makefile.in	1970-01-01 00:00:00
+++ a/gdb/data-directory/Makefile.in	1970-01-01 00:00:00
@@ -51,8 +51,10 @@ SYSCALLS_INSTALL_DIR = $(DESTDIR)$(GDB_D
 GEN_SYSCALLS_FILES = \
 	aarch64-linux.xml \
 	amd64-linux.xml \
+	amd64-illumos.xml \
 	arm-linux.xml \
 	i386-linux.xml \
+	i386-illumos.xml \
 	mips-n32-linux.xml \
 	mips-n64-linux.xml \
 	mips-o32-linux.xml \