This attached patch is intended to clarify the '-x' option using '-x
f77' as an example. I was not sure who should review.
Tested by inspecting the generated info file from make info.
OK for trunk and backport to 14?
Regards,
Jerry
Author: Jerry DeLisle <jvdeli...@gcc.gnu.org>
Date: Wed Feb 26 17:26:26 2025 -0800
GCC: Documentation of -x option
This change updates information about the -x option to clarify
that it does not ensure standards compliance. Sparked by
discussions in the following PR.
PR fortran/108369
gcc/ChangeLog:
* doc/invoke.texi: Add a note to clarify. Adjust some wording.
commit a933852fa177abd79f6a3de3a01fafa07ed6ddc6
Author: Jerry DeLisle <jvdeli...@gcc.gnu.org>
Date: Wed Feb 26 17:26:26 2025 -0800
GCC: Documentation of -x option
This change updates information about the -x option to clarify
that it does not ensure standards compliance. Sparked by
discussions in the following PR.
PR fortran/108369
gcc/ChangeLog:
* doc/invoke.texi: Add a note to clarify. Adjust some wording.
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi
index bad49a017cc..6f8bf392386 100644
--- a/gcc/doc/invoke.texi
+++ b/gcc/doc/invoke.texi
@@ -1700,9 +1700,13 @@ f77 f77-cpp-input f95 f95-cpp-input
go
@end smallexample
+Note that @option{-x} does not imply a particular language standard.
+For example @option{-x f77} may also require @option{-std=legacy} for some older
+source codes.
+
@item -x none
Turn off any specification of a language, so that subsequent files are
-handled according to their file name suffixes (as they are if @option{-x}
+handled according to their file name suffixes (as if @option{-x}
has not been used at all).
@end table
