[master] 9b7aa04 Also run generate.py if vmod_abi.h or vcs_version.h are missing

[Nils Goroll]

commit 9b7aa043bca96b30be2ba053e99d7c234ace5916
Author: Nils Goroll <nils.goroll at uplex.de>
Date:   Tue Mar 6 13:12:23 2018 +0100

    Also run generate.py if vmod_abi.h or vcs_version.h are missing
    
    Fixes #2597
    
    Merges #2600 slightly modified

diff --git a/include/Makefile.am b/include/Makefile.am
index 80f6569..0831e2e 100644
--- a/include/Makefile.am
+++ b/include/Makefile.am
@@ -124,7 +124,9 @@ GENERATED_H = vcl.h $(GEN_H)
 ## except when building from a distribution
 
 vcs_version.h:
-	$(AM_V_GEN) if test -d $(top_srcdir)/.git ; then \
+	@if test -e $(top_srcdir)/.git || \
+	  ! test -f vmod_abi.h || \
+	  ! test -f vcs_version.h ; then \
 	    @PYTHON@ $(srcdir)/generate.py \
 		$(top_srcdir) $(top_builddir) ; \
 	fi