https://github.com/termux/termux-packages/issues/15852

--- a/configure
+++ b/configure
@@ -369,7 +369,7 @@
 }
 CAN_DO()
 {
-	echo "main() { $1; }" > _conf.c
+	echo "int main() { $1; }" > _conf.c
 	$MT_TESTCOMP _conf.c -o _conf.tmp > /dev/null 2>&1
 }
 HAVE_FUNC()
@@ -413,7 +413,7 @@
 	DEFS="$DEFS -DHAVE__SFA"
 fi
 
-if HAVE_FUNC "mkdtemp"
+if true
 then
 	DEFS="$DEFS -DHAVE_MKDTEMP"
 fi