Merge pull request #537 from proux01/fix-makefile

Refix Makefile

Author: proux01

Makefile

@@ -100,8 +100,8 @@ distclean: sub-distclean this-distclean
 .PHONY: this-config this-build this-only this-test-suite this-test-suite-stdlib this-distclean this-clean
 
 this-config:: __always__
-	@command -v coqc >/dev/null || exit 0  # Maybe on Rocq (without coq shim), nothing to do anyway
-	@if [ -e config.stamp -a "`coqc --print-version`" = "`cat config.stamp 2>/dev/null`" ] ; then \
+	@if $$(command -v coqc >/dev/null) ; then \
+	if [ -e config.stamp -a "`coqc --print-version`" = "`cat config.stamp 2>/dev/null`" ] ; then \
 		echo 'already configured';\
 	else\
 		coqc --print-version > config.stamp;\
@@ -113,7 +113,7 @@ this-config:: __always__
 			sed -i.bak -e 's/From Corelib/From Coq/' `find . -name \*.v` ; \
 			sed -i.bak -e 's/IntDef/ZArith/' `find . -name \*.v` ; \
 		fi;\
-	fi
+	fi ; fi
 	# Remove all of the above when requiring Rocq >= 9.0
 
 this-build:: this-config Makefile.coq