Workaround to support more make programs

Avoid the use of "-include". Since "include" is interpreted by Automake, we have to use a special macro instead.

plugins-root/Makefile.am

@@ -4,7 +4,10 @@ NP-VERSION-FILE: .FORCE-NP-VERSION-FILE
 	@$(SHELL_PATH) $(top_srcdir)/NP-VERSION-GEN
 .FORCE-NP-VERSION-FILE:
 
--include NP-VERSION-FILE
+## This is undocumented and could possibly break in future versions of
+## automake. See:
+## http://article.gmane.org/gmane.comp.sysutils.automake.general/10036
+@am__include@ @am__quote@NP-VERSION-FILE@am__quote@
 
 AM_CFLAGS = -DNP_VERSION='"$(NP_VERSION)"'
 

plugins-scripts/Makefile.am

@@ -4,7 +4,10 @@ NP-VERSION-FILE: .FORCE-NP-VERSION-FILE
 	@$(SHELL_PATH) $(top_srcdir)/NP-VERSION-GEN
 .FORCE-NP-VERSION-FILE:
 
--include NP-VERSION-FILE
+## This is undocumented and could possibly break in future versions of
+## automake. See:
+## http://article.gmane.org/gmane.comp.sysutils.automake.general/10036
+@am__include@ @am__quote@NP-VERSION-FILE@am__quote@
 
 SUFFIXES = .pl .sh
 

plugins/Makefile.am

@@ -4,7 +4,10 @@ NP-VERSION-FILE: .FORCE-NP-VERSION-FILE
 	@$(SHELL_PATH) $(top_srcdir)/NP-VERSION-GEN
 .FORCE-NP-VERSION-FILE:
 
--include NP-VERSION-FILE
+## This is undocumented and could possibly break in future versions of
+## automake. See:
+## http://article.gmane.org/gmane.comp.sysutils.automake.general/10036
+@am__include@ @am__quote@NP-VERSION-FILE@am__quote@
 
 AM_CFLAGS = -DNP_VERSION='"$(NP_VERSION)"'