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cppinit.c (cpp_handle_option): Suppress warnings with an implicit "-w" for "-M" and "-MM".

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* cppinit.c (cpp_handle_option):  Suppress warnings with an
	implicit "-w" for "-M" and "-MM".
doc:
	* cppopts.texi: Update.
testsuite:
	* gcc.dg/cpp/cmdlne-M.c: New test.

From-SVN: r55185
This commit is contained in:
Neil Booth 2002-07-02 17:06:03 +00:00 • committed by Neil Booth
parent 06728f70cf
commit 49e7b251ee
3 changed files with 16 additions and 1 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2002-07-02 Neil Booth <neil@daikokuya.co.uk>
* cppinit.c (cpp_handle_option): Suppress warnings with an
implicit "-w" for "-M" and "-MM".
* doc/cppopts.texi: Update.
2002-07-01 Roger Sayle <roger@eyesopen.com>
* config/sh/sh.c (sh_media_init_builtins): Change use of poisoned

3
gcc/doc/cppopts.texi
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@ -178,7 +178,8 @@ rules you should explicitly specify the dependency output file with
@env{DEPENDENCIES_OUTPUT} (@pxref{Environment Variables}). Debug output
will still be sent to the regular output stream as normal.
Passing @option{-M} to the driver implies @option{-E}.
Passing @option{-M} to the driver implies @option{-E}, and suppresses
warnings with an implicit @option{-w}.
@item -MM
@opindex MM

8
gcc/testsuite/gcc.dg/cpp/cmdlne-M.c Normal file
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@ -0,0 +1,8 @@
/* Copyright (C) 2002 Free Software Foundation, Inc. */
/* { dg-do preprocess } */
/* { dg-options "-M" } */
/* Test that dependency output suppresses warnings by implying -w. */
#warning bogus /* { dg-bogus "warning" "warning not suppressed" } */