@@ -21,10 +21,11 @@
 TCL_PACKAGE_PATH = @TCL_PACKAGE_PATH@
 tcllibdir = $(shell if echo "$(libdir)" | grep '^UNSPECIFIED' >/dev/null; then echo $(TCL_PACKAGE_PATH); else echo "$(libdir)"; fi)
 PACKAGE_INSTALL_DIR = $(tcllibdir)/$(PACKAGE_NAME)-$(PACKAGE_VERSION)
 TCC_CONFIGURE_OPTS = --extra-cflags='$(CPPFLAGS) $(CFLAGS)' --with-tcl=$(TCLCONFIGPATH) --sysincludepaths='{B}/include' --libpaths='{B}/lib' @TCC_CONFIGURE_OPTS@
 srcdir = @srcdir@
+host_os = @host_os@
 @SET_MAKE@
 
 all: $(TARGET)
 
 tcc/config.h:
@@ -63,11 +64,11 @@
 	$(INSTALL) -m 0644 pkgIndex.tcl "$(DESTDIR)$(PACKAGE_INSTALL_DIR)"
 	$(INSTALL) -m 0644 $(srcdir)/tcc.tcl "$(DESTDIR)$(PACKAGE_INSTALL_DIR)"
 	$(INSTALL) -m 0644 tcc/libtcc1.a "$(DESTDIR)$(PACKAGE_INSTALL_DIR)/lib"
 	$(INSTALL) -m 0644 $(shell echo $(srcdir)/tcc/include/*) "$(DESTDIR)$(PACKAGE_INSTALL_DIR)/include"
 	( for file in tcl.h limits.h unistd.h; do echo "#include <$${file}>"; done ) | \
-		$(CC) $(CPPFLAGS) $(CFLAGS) -I$(srcdir)/tcc/include -I$(srcdir)/tcc/include -E - | awk -f $(srcdir)/headers.awk | while read src dst; do \
+		$(CC) $(CPPFLAGS) $(CFLAGS) -I$(srcdir)/target-headers/$(host_os)/include -I$(srcdir)/target-headers/$(host_os)/include -I$(srcdir)/tcc/include -I$(srcdir)/tcc/include -E - | awk -f $(srcdir)/headers.awk | while read src dst; do \
 			dst="$(DESTDIR)$(PACKAGE_INSTALL_DIR)/include/$$dst"; \
 			if [ -e "$${dst}" ]; then continue; fi; \
 			dstdir="$$(dirname "$$dst")"; \
 			echo mkdir -p "$$dstdir"; \
 			mkdir -p "$$dstdir"; \