[master] b365be2d2 try to avoid a make race

[Nils Goroll]

commit b365be2d281944d5c79be92ff73b3dc02c5db6be
Author: Nils Goroll <nils.goroll at uplex.de>
Date:   Tue Mar 10 14:02:44 2020 +0100

    try to avoid a make race
    
    vcc_compile.h is generated and included by other compilation units, so
    we need to make sure that this happens in sequence.
    
    Seen on vtest:
    
    make[5]: Entering directory
    '/tmp/vtest.32_sun12.4/varnish-cache/lib/libvcc'
      CC       libvcc_a-vcc_acl.o
      CC       libvcc_a-vcc_action.o
      CC       libvcc_a-vcc_backend.o
      CC       libvcc_a-vcc_backend_util.o
      CC       libvcc_a-vcc_compile.o
      CC       libvcc_a-vcc_expr.o
    mkdir -p ../../include/tbl
    /opt/local/bin/python3.4 ../../lib/libvcc/generate.py \
        ../.. ../..
      CC       libvcc_a-vcc_parse.o
      CC       libvcc_a-vcc_storage.o
      CC       libvcc_a-vcc_symb.o
    "vcc_compile.h", line 194: undefined symbol: VCL_RET_MAX
    "vcc_compile.h", line 194: can not declare variably modified type at file scope
    cc: acomp failed for vcc_parse.c
    Makefile:668: recipe for target 'libvcc_a-vcc_parse.o' failed

diff --git a/lib/libvcc/Makefile.am b/lib/libvcc/Makefile.am
index be4d4c66d..09ed89b36 100644
--- a/lib/libvcc/Makefile.am
+++ b/lib/libvcc/Makefile.am
@@ -54,7 +54,7 @@ GEN_H = \
 	vcc_fixed_token.c \
 	vcc_token_defs.h
 
-$(GEN_H): vcc_obj.c
+$(GEN_H): vcc_obj.c vcc_compile.h
 
 GENERATED_H = vcc_obj.c $(GEN_H)