Install mimalloc headers

Author: oraluben

Makefile.pre.in

@@ -2581,6 +2581,11 @@ inclinstall:
 		$(INSTALL) -d -m $(DIRMODE) $(DESTDIR)$(INCLUDEPY)/internal; \
 	else	true; \
 	fi
+	@if test ! -d $(DESTDIR)$(INCLUDEPY)/internal/mimalloc/mimalloc; then \
+		echo "Creating directory $(DESTDIR)$(INCLUDEPY)/internal/mimalloc/mimalloc"; \
+		$(INSTALL) -d -m $(DIRMODE) $(DESTDIR)$(INCLUDEPY)/internal/mimalloc/mimalloc; \
+	else	true; \
+	fi
 	@for i in $(srcdir)/Include/*.h; \
 	do \
 		echo $(INSTALL_DATA) $$i $(INCLUDEPY); \
@@ -2596,6 +2601,12 @@ inclinstall:
 		echo $(INSTALL_DATA) $$i $(INCLUDEPY)/internal; \
 		$(INSTALL_DATA) $$i $(DESTDIR)$(INCLUDEPY)/internal; \
 	done
+	$(INSTALL_DATA) $(srcdir)/Include/internal/mimalloc/mimalloc.h $(DESTDIR)$(INCLUDEPY)/internal/mimalloc
+	@for i in $(srcdir)/Include/internal/mimalloc/mimalloc/*.h; \
+	do \
+		echo $(INSTALL_DATA) $$i $(INCLUDEPY)/internal/mimalloc/mimalloc; \
+		$(INSTALL_DATA) $$i $(DESTDIR)$(INCLUDEPY)/internal/mimalloc/mimalloc; \
+	done
 	$(INSTALL_DATA) pyconfig.h $(DESTDIR)$(CONFINCLUDEPY)/pyconfig.h
 
 # Install the library and miscellaneous stuff needed for extending/embedding