[PATCH 2/3] doc: fix out-of-tree build

[David Bremner]

The subtle part is adding .rst and .py files to vpath so they can be
used as dependencies without prefixing with $(srcdir)

We also change the interface to mkbuildeps.py: rather than getting the
containing directory from the conf file path, we go the other way.
---
 configure          |  3 ++-
 doc/Makefile.local | 12 ++++++------
 doc/mkdocdeps.py   |  7 ++++---
 3 files changed, 12 insertions(+), 10 deletions(-)

diff --git a/configure b/configure
index b3b1b44..bc61ad1 100755
--- a/configure
+++ b/configure
@@ -713,8 +713,9 @@ configure_options = $@
 # files, (which is quite ugly).
 vpath %.c \$(srcdir)
 vpath %.cc \$(srcdir)
-vpath %.1 \$(srcdir)
 vpath Makefile.% \$(srcdir)
+vpath %.py \$(srcdir)
+vpath %.rst \$(srcdir)
 
 # The C compiler to use
 CC = ${CC}
diff --git a/doc/Makefile.local b/doc/Makefile.local
index 9c31c24..0980c71 100644
--- a/doc/Makefile.local
+++ b/doc/Makefile.local
@@ -3,15 +3,15 @@
 dir := doc
 
 # You can set these variables from the command line.
-SPHINXOPTS    := -q -c $(dir)
+SPHINXOPTS    := -q
 SPHINXBUILD   = sphinx-build
 DOCBUILDDIR      := $(dir)/_build
 
-prerst2man := python $(dir)/prerst2man.py
-mkdocdeps := python $(dir)/mkdocdeps.py
+prerst2man := python $(srcdir)/$(dir)/prerst2man.py
+mkdocdeps := python $(srcdir)/$(dir)/mkdocdeps.py
 
 # Internal variables.
-ALLSPHINXOPTS   := -d $(DOCBUILDDIR)/doctrees $(SPHINXOPTS) $(dir)
+ALLSPHINXOPTS   := -d $(DOCBUILDDIR)/doctrees $(SPHINXOPTS) $(srcdir)/$(dir)
 
 .PHONY: sphinx-html sphinx-texinfo sphinx-info
 
@@ -43,7 +43,7 @@ ifeq ($(HAVE_SPHINX),1)
 	    mv $(DOCBUILDDIR)/man/*.$${section} $(DOCBUILDDIR)/man/man$${section}; \
 	done
 else ifeq ($(HAVE_RST2MAN),1)
-	$(prerst2man) $(DOCBUILDDIR)/.. $(DOCBUILDDIR)/man
+	$(prerst2man) $(srcdir)/doc $(DOCBUILDDIR)/man
 else
 	@echo "Fatal: build dependency fail."
 	@false
@@ -68,7 +68,7 @@ install-man: ${MAN_GZIP_FILES}
 endif
 
 $(dir)/docdeps.mk: $(dir)/conf.py $(dir)/mkdocdeps.py
-	$(mkdocdeps) $< $(DOCBUILDDIR) $@
+	$(mkdocdeps) $(srcdir)/doc $(DOCBUILDDIR) $@
 
 CLEAN := $(CLEAN) $(DOCBUILDDIR) $(dir)/docdeps.mk $(dir)/man.stamp
 CLEAN := $(CLEAN) $(MAN_GZIP_FILES) $(MAN_ROFF_FILES)
diff --git a/doc/mkdocdeps.py b/doc/mkdocdeps.py
index 3effdd8..71bd135 100644
--- a/doc/mkdocdeps.py
+++ b/doc/mkdocdeps.py
@@ -1,15 +1,16 @@
 from sys import argv
-conffile = argv[1]
+srcdir = argv[1]
 builddir = argv[2]
 outfile = argv[3]
 
-execfile(conffile)
+execfile(srcdir + '/conf.py')
+
 
 roff_files = []
 rst_files = []
 out=open(outfile,'w')
 for page in man_pages:
-    rst_files = rst_files + ["doc/{0:s}.rst".format(page[0])]
+    rst_files = rst_files + ["{0:s}/{1:s}.rst".format(srcdir,page[0])]
     roff_files = roff_files + ["{0:s}/man/{1:s}.{2:d}".format(builddir,page[0],page[4])]
 
 out.write ('MAN_ROFF_FILES := ' + ' \\\n\t'.join(roff_files)+'\n')
-- 
1.9.0