Index: Makefile.in
==================================================================
--- Makefile.in
+++ Makefile.in
@@ -111,13 +111,13 @@
 
 distclean: clean
 	rm -rf autom4te.cache
 	rm -f config.log config.status
 	rm -f pkgIndex.tcl tcc4tcl.syms
-	rm -f Makefile
+	rm -f Makefile tcc/Makefile
 
 mrproper: distclean
 	rm -rf tcc
 	rm -f configure aclocal.m4
 	rm -f config.guess config.sub install-sh
 
 .PHONY: all install test clean distclean mrproper

Index: build/pre.sh
==================================================================
--- build/pre.sh
+++ build/pre.sh
@@ -42,10 +42,13 @@
 	## Apply patches
 	for patchfile in ../build/tcc-patches/${tcc_version}/*.diff; do
 		( cd * && patch --no-backup-if-mismatch -p1 ) < "${patchfile}"
 	done
 
+	## Rename "Makefile" to "Makefile.in" so configure processes it
+	( cd * && mv Makefile Makefile.in ) || exit 1
+
 	rm -rf ../tcc
 	mkdir ../tcc || exit 1
 	mv */* ../tcc/
-)
+) || exit 1
 rm -rf __TMP__

ADDED   build/tcc-patches/0.9.26/tcc-0.9.26-fixmakefile.diff
Index: build/tcc-patches/0.9.26/tcc-0.9.26-fixmakefile.diff
==================================================================
--- build/tcc-patches/0.9.26/tcc-0.9.26-fixmakefile.diff
+++ build/tcc-patches/0.9.26/tcc-0.9.26-fixmakefile.diff
@@ -0,0 +1,12 @@
+diff -uNr tcc-0.9.26.orig/Makefile tcc-0.9.26-fixmakefile/Makefile
+--- tcc-0.9.26.orig/Makefile	2013-02-15 08:24:00.000000000 -0600
++++ tcc-0.9.26-fixmakefile/Makefile	2016-12-08 23:20:32.856086001 -0600
+@@ -16,7 +16,7 @@
+ ifeq (-$(GCC_MAJOR)-$(findstring $(GCC_MINOR),56789)-,-4--)
+ CFLAGS+=-D_FORTIFY_SOURCE=0
+ else
+-CFLAGS+=-Wno-unused-result
++CFLAGS+=@TCC_WNO_UNUSED_RESULT@
+ endif
+ endif
+ endif

Index: configure.ac
==================================================================
--- configure.ac
+++ configure.ac
@@ -66,10 +66,29 @@
 ])
 
 if test "$no_dlopen" = '1'; then
 	CPPFLAGS="${CPPFLAGS} -DCONFIG_TCC_STATIC_NODLOPEN=1"
 fi
+
+dnl Determine if the compiler supports -Wno-unused-result
+AC_CACHE_CHECK([if compiler supports -Wno-unused-result], [tcc4tcl_cv_compiler_wno_unused_result], [
+	SAVE_CFLAGS="${CFLAGS}"
+	CFLAGS="${SAVE_CFLAGS} -Wno-unused-result"
+	AC_COMPILE_IFELSE([AC_LANG_SOURCE()], [
+		tcc4tcl_cv_compiler_wno_unused_result='yes'
+	], [
+		tcc4tcl_cv_compiler_wno_unused_result='no'
+	])
+	CFLAGS="${SAVE_CFLAGS}"
+])
+
+if test "$tcc4tcl_cv_compiler_wno_unused_result" = 'yes'; then
+	TCC_WNO_UNUSED_RESULT='-Wno-unused-result'
+else
+	TCC_WNO_UNUSED_RESULT='-Wno-unused-result'
+fi
+AC_SUBST(TCC_WNO_UNUSED_RESULT)
 
 dnl Determine HOST_PATH_SEPERATOR
 case $host_os in
 	*mingw*)
 		HOST_PATH_SEPARATOR=';'
@@ -87,6 +106,6 @@
 if test "${TCC4TCL_TARGET}" = "shared"; then
 	DC_SETUP_STABLE_API([${srcdir}/tcc4tcl.vers], [tcc4tcl.syms])
 fi
 
 dnl Produce output
-AC_OUTPUT(Makefile pkgIndex.tcl tcc4tcl.syms)
+AC_OUTPUT(Makefile pkgIndex.tcl tcc4tcl.syms tcc/Makefile)