Support Coq 8.11.0 (#212)

Update configure.
Ignore and clean up .vok and .vos files, which Coq 8.11.0 generates.

Author: xavierleroy

.gitignore

@@ -1,5 +1,7 @@
 # Object files, in general
 *.vo
+*.vok
+*.vos
 *.glob
 *.o
 *.a

Changelog

@@ -1,3 +1,7 @@
+Coq development:
+- Compatibility with Coq version 8.11.0 (#316)
+
+	
 Release 3.6, 2019-09-17
 =======================
 

Makefile

@@ -258,7 +258,7 @@ endif
 
 
 clean:
-	rm -f $(patsubst %, %/*.vo, $(DIRS))
+	rm -f $(patsubst %, %/*.vo*, $(DIRS))
 	rm -f $(patsubst %, %/.*.aux, $(DIRS))
 	rm -rf doc/html doc/*.glob
 	rm -f driver/Version.ml

configure

@@ -530,7 +530,7 @@ missingtools=false
 echo "Testing Coq... " | tr -d '\n'
 coq_ver=$(${COQBIN}coqc -v 2>/dev/null | sed -n -e 's/The Coq Proof Assistant, version \([^ ]*\).*$/\1/p')
 case "$coq_ver" in
-  8.8.0|8.8.1|8.8.2|8.9.0|8.9.1|8.10.0|8.10.1|8.10.2)
+  8.8.0|8.8.1|8.8.2|8.9.0|8.9.1|8.10.0|8.10.1|8.10.2|8.11.0)
         echo "version $coq_ver -- good!";;
   ?*)
         echo "version $coq_ver -- UNSUPPORTED"