X-Git-Url: http://git.annexia.org/?p=libguestfs.git;a=blobdiff_plain;f=src%2FMakefile.am;h=1c0fa0ac5dc22c8a52d207768619f927e6a707b5;hp=c310c9c4e8873762c86538a69b7bd34c8fc08e2d;hb=11d8dd84d475c89c7fff702e7f7ac5bf57971ac4;hpb=c41fe04a652437c920acb0e820762c53bf44a139

diff --git a/src/Makefile.am b/src/Makefile.am
index c310c9c..1c0fa0a 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -15,17 +15,82 @@
 # along with this program; if not, write to the Free Software
 # Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 
-EXTRA_DIST = guestfs_protocol.x \
+EXTRA_DIST = \
+	guestfs_protocol.x \
 	guestfs_protocol.c \
-	guestfs_protocol.h
+	guestfs_protocol.h \
+	MAX_PROC_NR \
+	stamp-generator \
+	generator.ml
+
+# Rerun the generator if it has changed.
+# Git removes empty directories, so in cases where the
+# generator is creating the sole file in a directory, we
+# have to create the directory first.
+noinst_DATA = stamp-generator
 
-EXTRA_DIST += generator.ml
+stamp-generator: generator.ml
+	mkdir -p $(top_srcdir)/perl/lib/Sys
+	cd .. && ocaml -warn-error A $(srcdir)/src/$<
+
+guestfs_protocol.x: stamp-generator
 
 include_HEADERS = guestfs.h guestfs-actions.h guestfs-structs.h
 
 lib_LTLIBRARIES = libguestfs.la
 
-libguestfs_la_LDFLAGS = -version-info 0:0:0
+# From the libtool info file, with comments:
+#
+# |  1. Start with version information of `0:0:0' for each libtool library.
+# |
+# |  2. Update the version information only immediately before a public
+# |     release of your software.  More frequent updates are unnecessary,
+# |     and only guarantee that the current interface number gets larger
+# |     faster.
+# |
+# |  3. If the library source code has changed at all since the last
+# |     update, then increment REVISION (`C:R:A' becomes `C:r+1:A').
+#
+# [So it seems like we should always update the middle 'R' field
+# for any release.]
+#
+# |  4. If any interfaces have been added, removed, or changed since the
+# |     last update, increment CURRENT, and set REVISION to 0.
+# |
+# |  5. If any interfaces have been added since the last public release,
+# |     then increment AGE.
+#
+# [These two rules seem to mean that if any change is made to the
+# generator, we should increment C and A, and set R to 0, so:
+# C+1:0:A+1.]
+#
+# |  6. If any interfaces have been removed since the last public release,
+# |     then set AGE to 0.
+#
+# [Our ABI guarantee means we won't remove interfaces except in
+# very exceptional circumstances.]
+#
+# The maximum proc number (see guestfs_protocol.x:guestfs_procedure) is
+# a mostly accurate stand-in for C & A in rules 5 & 6, so we use that.  It
+# is always incremented when we add a new appliance interface, and easy to
+# calculate.
+#
+# The middle number is hard to increment-and-reset as described in rules
+# 4 & 5, so for the moment it is always set to 0.
+#
+# Note that this scheme means the real library version will always be
+# 'libguestfs.so.0.$(MAX_PROC_NR).0'.
+
+BUILT_SOURCES = \
+  guestfs_protocol.x \
+  guestfs-structs.h \
+  guestfs-actions.h \
+  guestfs-actions.c \
+  guestfs-bindtests.c
+
+$(BUILT_SOURCES): stamp-generator
+
+libguestfs_la_LDFLAGS = -version-info $(MAX_PROC_NR):0:$(MAX_PROC_NR)
 libguestfs_la_SOURCES = \
 	guestfs.c \
 	guestfs.h \