Hi, this is the 4th version of the patch.

mainly address Martin’s comments on some spelling issues.

I have tested the patch on both x86 and aarch64, no issue.

Okay for commit?

thanks.

Qing.

gcc/ChangeLog

+2018-09-20  Qing Zhao  <qing.zhao@oracle.com>
+
+	* cif-code.def (FUNCTION_EXTERN): New CIFCODE.
+	* common.opt (-finline-only-static): New option.
+	* doc/invoke.texi: Document -finline-only-static.
+	* ipa-inline.c (can_inline_edge_p): Control inlining based on
+	function's linkage. 

gcc/testsuite/ChangeLog

+2018-09-20  Qing Zhao  <qing.zhao@oracle.com>
+
+	* gcc.dg/inline_only_static.c: New test.
+