Move the install-compiler-sources target from Makefile to Makefile.sh…

…ared

This target has been introduced by GPR ocaml#827 but added only to the
Unix build system. This commit makes it available to the Windows build
system, too.

Makefile

@@ -287,12 +287,6 @@ installoptopt:
 	cd $(INSTALL_COMPLIBDIR) && $(RANLIB) ocamlcommon.a ocamlbytecomp.a \
 	   ocamloptcomp.a
 
-# Installation of the *.ml sources of compiler-libs
-install-compiler-sources:
-	cp utils/*.ml parsing/*.ml typing/*.ml bytecomp/*.ml driver/*.ml \
-	   toplevel/*.ml middle_end/*.ml middle_end/base_types/*.ml \
-	   asmcomp/*.ml $(INSTALL_COMPLIBDIR)
-
 # Build the manual latex files from the etex source files
 # (see manual/README.md)
 manual-pregen: opt.opt

Makefile.shared

@@ -355,6 +355,13 @@ flexlink.opt:
 	mv flexlink.exe flexlink.opt && \
 	mv flexlink flexlink.exe
 
+# Installation of the *.ml sources of compiler-libs
+.PHONY: install-compiler-sources
+install-compiler-sources:
+	cp utils/*.ml parsing/*.ml typing/*.ml bytecomp/*.ml driver/*.ml \
+	   toplevel/*.ml middle_end/*.ml middle_end/base_types/*.ml \
+	   asmcomp/*.ml $(INSTALL_COMPLIBDIR)
+
 # Run all tests
 
 .PHONY: tests