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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".

From-SVN: r55195
This commit is contained in:
Neil Booth 2002-07-02 22:28:18 +00:00 committed by Neil Booth
parent b6fb43ab3e
commit ba57a9c052
2 changed files with 15 additions and 14 deletions
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1
gcc/ChangeLog
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@ -29,6 +29,7 @@ Tue Jul 2 18:45:45 2002 J"orn Rennecke <joern.rennecke@superh.com>
2002-07-02 Neil Booth <neil@daikokuya.co.uk>
PR preprocessor/7029
* cppinit.c (cpp_handle_option): Suppress warnings with an
implicit "-w" for "-M" and "-MM".
* doc/cppopts.texi: Update.

28
gcc/cppinit.c
View File

@ -1532,10 +1532,12 @@ cpp_handle_option (pfile, argc, argv)
or environment var dependency generation is used. */
CPP_OPTION (pfile, print_deps) = 2;
CPP_OPTION (pfile, no_output) = 1;
CPP_OPTION (pfile, inhibit_warnings) = 1;
break;
case OPT_MM:
CPP_OPTION (pfile, print_deps) = 1;
CPP_OPTION (pfile, no_output) = 1;
CPP_OPTION (pfile, inhibit_warnings) = 1;
break;
case OPT_MF:
CPP_OPTION (pfile, deps_file) = arg;
@ -1794,14 +1796,13 @@ cpp_post_options (pfile)
if (CPP_OPTION (pfile, traditional))
CPP_OPTION (pfile, show_column) = 0;
/* -dM makes no normal output. This is set here so that -dM -dD
works as expected. */
/* -dM and dependencies suppress normal output; do it here so that
the last -d[MDN] switch overrides earlier ones. */
if (CPP_OPTION (pfile, dump_macros) == dump_only)
CPP_OPTION (pfile, no_output) = 1;
/* Disable -dD, -dN and -dI if we should make no normal output
(such as with -M). Allow -M -dM since some software relies on
this. */
/* Disable -dD, -dN and -dI if normal output is suppressed. Allow
-dM since at least glibc relies on -M -dM to work. */
if (CPP_OPTION (pfile, no_output))
{
if (CPP_OPTION (pfile, dump_macros) != dump_only)
@ -1809,17 +1810,16 @@ cpp_post_options (pfile)
CPP_OPTION (pfile, dump_includes) = 0;
}
/* We need to do this after option processing and before
cpp_start_read, as cppmain.c relies on the options->no_output to
set its callbacks correctly before calling cpp_start_read. */
/* Intialize, and check environment variables for, dependency
output. */
init_dependency_output (pfile);
/* After checking the environment variables, check if -M or -MM has
not been specified, but other -M options have. */
if (CPP_OPTION (pfile, print_deps) == 0 &&
(CPP_OPTION (pfile, print_deps_missing_files)
|| CPP_OPTION (pfile, deps_file)
|| CPP_OPTION (pfile, deps_phony_targets)))
/* If we're not outputting dependencies, complain if other -M
options have been given. */
if (!CPP_OPTION (pfile, print_deps)
&& (CPP_OPTION (pfile, print_deps_missing_files)
|| CPP_OPTION (pfile, deps_file)
|| CPP_OPTION (pfile, deps_phony_targets)))
cpp_error (pfile, DL_ERROR,
"you must additionally specify either -M or -MM");
}