PR driver/80545 - option -Wstringop-overflow not recognized by Fortran

gcc/cp/ChangeLog:

	PR driver/80545
	* decl.c (finish_function): Use lang_mask.

gcc/testsuite/ChangeLog:

	PR driver/80545
	* gcc.misc-tests/help.exp: Add tests.
	* lib/options.exp: Handle C++.

gcc/ChangeLog:

	PR driver/80545
	* diagnostic.c (diagnostic_classify_diagnostic): Use lang_mask.
	(diagnostic_report_diagnostic): Same.
	* diagnostic.h (diagnostic_context::option_enabled): Add an argument.
	(diagnostic_context::lang_mask): New data member.
	* ipa-pure-const.c (suggest_attribute): Use
	lang_hooks.option_lang_mask ().
	* opts-common.c (option_enabled): Handle new argument.
	(get_option_state): Pass an additional argument.
	* opts.c (print_filtered_help): Print supported languages for
	unsupported options.  Adjust printing of current state.
	* opts.h (option_enabled): Add argument.
	* toplev.c (print_switch_values): Use lang_mask.
	(general_init): Set global_dc->lang_mask.

From-SVN: r273771

3 files changed, 52 insertions, 9 deletions

diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 621eda9..4749b0c 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,9 @@
+2019-07-24  Martin Sebor  <msebor@redhat.com>
+
+	PR driver/80545
+	* gcc.misc-tests/help.exp: Add tests.
+	* lib/options.exp: Handle C++.
+
 2019-07-24  Claudiu Zissulescu  <claziss@synopsys.com>
 
 	* gcc.target/arc/arc.exp (check_effective_target_accregs): New
diff --git a/gcc/testsuite/gcc.misc-tests/help.exp b/gcc/testsuite/gcc.misc-tests/help.exp
index 307f1e9..b8a09fc 100644
--- a/gcc/testsuite/gcc.misc-tests/help.exp
+++ b/gcc/testsuite/gcc.misc-tests/help.exp
@@ -91,6 +91,34 @@ maximum number of
 -O
 } "" ""
 
+# Verify that a C++/Objective C++ only option is indicated as such
+# by the C compiler.
+check_for_options c "-Q --help=warnings" {
+-Wclass-memaccess[ \t]+\[available in C\+\+, ObjC\+\+\]
+} "" ""
+
+# Do the same for a C/Objective C only option and the C++ compiler.
+check_for_options c++ "-Q --help=warnings" {
+-Wabsolute-value[ \t]+\[available in C, ObjC\]
+} "" ""
+
+# Verify that an option that's an alias for another option is shown
+# with the other option as the value.
+check_for_options c "-Q --help=warnings" {
+--all-warnings[ \t]+\-Wall
+-W[ \t]+-Wextra
+-Wmissing-format-attribute[ \t]+-Wsuggest-attribute=format
+-Wno-alloc-size-larger-than[ \t]+-Walloc-size-larger-than=[1-9][0-9]+
+-Wno-vla-larger-than[ \t]+-Wvla-larger-than=[1-9][0-9]+
+} "" ""
+
+# Verify that an option that expects a byte-size argument is shown with
+# a meaningful byte-size argument as the value.
+check_for_options c "-Q --help=warnings" {
+-Walloc-size-larger-than=[ \t]+[1-9][0-9]+ bytes
+-Wlarger-than=[^\n\r]+[1-9][0-9]+ bytes
+} "" ""
+
 # Ensure PR 37805 is fixed.
 # Specify patterns (arguments 3 and later) that match option names
 # at the beginning of the line and not when they are referenced by
diff --git a/gcc/testsuite/lib/options.exp b/gcc/testsuite/lib/options.exp
index b850307..c8f0c70 100644
--- a/gcc/testsuite/lib/options.exp
+++ b/gcc/testsuite/lib/options.exp
@@ -34,21 +34,30 @@ proc check_for_options_with_filter { language gcc_options exclude \
 					 compiler_patterns \
 					 compiler_non_patterns \
 					 expected_failure } {
-    set filename test-[pid]
-    set fd [open $filename.c w]
-    puts $fd "int main (void) { return 0; }"
-    close $fd
-    remote_download host $filename.c
-
     set test "compiler driver $gcc_options option(s):"
     set gcc_options "\{additional_flags=$gcc_options\}"
 
     switch "$language" {
-	"c" { set compiler cc1 }
+	"c" {
+	    set compiler cc1
+	    set suffix c
+	}
+	"c++" {
+	    set compiler cc1plus
+	    set suffix cc
+	}
 	default { error "unknown language" }
     }
-    set gcc_output [gcc_target_compile $filename.c $filename.x executable $gcc_options]
-    remote_file build delete $filename.c $filename.x $filename.gcno
+
+    set filebase test-[pid]
+    set srcfname $filebase.$suffix
+    set fd [open $srcfname w]
+    puts $fd "int main (void) { return 0; }"
+    close $fd
+    remote_download host $srcfname
+
+    set gcc_output [gcc_target_compile $srcfname $filebase.x executable $gcc_options]
+    remote_file build delete $srcfname $filebase.x $filebase.gcno
 
     if { $exclude != "" } {
 	set lines [split $gcc_output "\n"]