[PATCH v1] build: isolate core libvirt libs deps from xen runtime

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From: Wim ten Have <wim.ten.have@xxxxxxxxxx>

Generating libvirt packages per make rpm, "with-libxl=1" and "with-xen=1",
adds strict runtime dependencies per libxenlight for xen-libs package from
core libvirt-libs package.  This is not necessary and unfortunate since
those dependencies set demand to "xen-libs" package even when there's no
need for libvirt xen or libxl driver components.

This patch is to have two separate xenconfig lib tool libraries: one for
core libvirt (without XL), and a another that contains xl for libxl driver
(libvirt_driver_libxl_impl.la) which when loading the driver, loads the
remaining symbols (xen{Format,Parse}XL. For the user/sysadmin, this means
the xen dependencies are moved into libxl driver, instead of core libvirt.

Signed-off-by: Joao Martins <joao.m.martins@xxxxxxxxxx>
Signed-off-by: Wim ten Have <wim.ten.have@xxxxxxxxxx>
---
 src/Makefile.am              | 23 +++++++++++++----------
 src/libvirt_xenxlconfig.syms | 12 ------------
 2 files changed, 13 insertions(+), 22 deletions(-)
 delete mode 100644 src/libvirt_xenxlconfig.syms

diff --git a/src/Makefile.am b/src/Makefile.am
index 173fba1e6..b74856ba7 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -1197,7 +1197,8 @@ XENCONFIG_SOURCES =						\
 		xenconfig/xen_sxpr.c xenconfig/xen_sxpr.h	\
 		xenconfig/xen_xm.c xenconfig/xen_xm.h
 if WITH_LIBXL
-XENCONFIG_SOURCES +=						\
+XENCONFIG_LIBXL_SOURCES =					\
+		$(XENCONFIG_SOURCES)				\
 		xenconfig/xen_xl.c xenconfig/xen_xl.h
 endif WITH_LIBXL
 
@@ -1258,10 +1259,17 @@ endif WITH_VMX
 if WITH_XENCONFIG
 noinst_LTLIBRARIES += libvirt_xenconfig.la
 libvirt_la_BUILT_LIBADD += libvirt_xenconfig.la
-libvirt_xenconfig_la_LIBADD = $(LIBXL_LIBS)
 libvirt_xenconfig_la_CFLAGS = \
-		-I$(srcdir)/conf -I$(srcdir)/libxl $(AM_CFLAGS)
+		-I$(srcdir)/conf $(AM_CFLAGS)
 libvirt_xenconfig_la_SOURCES = $(XENCONFIG_SOURCES)
+
+if WITH_LIBXL
+noinst_LTLIBRARIES += libvirt_xenconfig_libxl.la
+libvirt_xenconfig_libxl_la_LIBADD = $(LIBXL_LIBS)
+libvirt_xenconfig_libxl_la_CFLAGS = \
+		-I$(srcdir)/conf -I$(srcdir)/libxl $(AM_CFLAGS)
+libvirt_xenconfig_libxl_la_SOURCES = $(XENCONFIG_LIBXL_SOURCES)
+endif WITH_LIBXL
 endif WITH_XENCONFIG
 
 
@@ -1417,7 +1425,7 @@ libvirt_driver_libxl_impl_la_CFLAGS = 		\
 		$(AM_CFLAGS)
 libvirt_driver_libxl_impl_la_LDFLAGS = $(AM_LDFLAGS)
 libvirt_driver_libxl_impl_la_LIBADD = $(LIBXL_LIBS) \
-				      libvirt_xenconfig.la \
+				      libvirt_xenconfig_libxl.la \
 				      libvirt_secret.la
 libvirt_driver_libxl_impl_la_SOURCES = $(LIBXL_DRIVER_SOURCES)
 
@@ -2045,6 +2053,7 @@ EXTRA_DIST +=							\
 		$(VBOX_DRIVER_EXTRA_DIST)			\
 		$(VMWARE_DRIVER_SOURCES)			\
 		$(XENCONFIG_SOURCES)				\
+		$(XENCONFIG_LIBXL_SOURCES)			\
 		$(ACCESS_DRIVER_POLKIT_POLICY)
 
 check-local: check-augeas
@@ -2228,12 +2237,6 @@ else ! WITH_XENCONFIG
 SYM_FILES += $(srcdir)/libvirt_xenconfig.syms
 endif ! WITH_XENCONFIG
 
-if WITH_LIBXL
-USED_SYM_FILES += $(srcdir)/libvirt_xenxlconfig.syms
-else ! WITH_LIBXL
-SYM_FILES += $(srcdir)/libvirt_xenxlconfig.syms
-endif ! WITH_LIBXL
-
 if WITH_SASL
 USED_SYM_FILES += $(srcdir)/libvirt_sasl.syms
 else ! WITH_SASL
diff --git a/src/libvirt_xenxlconfig.syms b/src/libvirt_xenxlconfig.syms
deleted file mode 100644
index dbe43aac7..000000000
--- a/src/libvirt_xenxlconfig.syms
+++ /dev/null
@@ -1,12 +0,0 @@
-#
-# These symbols are dependent upon --with-libxl via WITH_LIBXL.
-#
-
-#xenconfig/xen_xl.h
-xenFormatXL;
-xenParseXL;
-
-# Let emacs know we want case-insensitive sorting
-# Local Variables:
-# sort-fold-case: t
-# End:
-- 
2.13.6

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