autoconf deprecated INCLUDE around version 2.69. No other automake file
in the project uses INCLUDE (instead they use AM_CPPFLAGS) and this
warning prevents the bootstrap-configure-make process from working on
OSX for me. Updating the variable name in the include/Makefile.am fixes
this and allows me to move along with development on OSX.
-INCLUDES = yaml.h
+AM_CPPFLAGS = yaml.h
DOXYGEN_CFG = $(top_srcdir)/doc/doxygen.cfg
-nobase_include_HEADERS = $(INCLUDES)
+nobase_include_HEADERS = $(AM_CPPFLAGS)
if DOXYGEN
-html: $(INCLUDES) $(DOXYGEN_CFG)
+html: $(AM_CPPFLAGS) $(DOXYGEN_CFG)
PACKAGE=$(PACKAGE) VERSION=$(VERSION) top_srcdir=$(top_srcdir) top_builddir=$(top_builddir) doxygen $(DOXYGEN_CFG)
endif