Re: tests for --help

[Ralf Wildenhues <Ralf dot Wildenhues at gmx dot de>]

Ping <http://gcc.gnu.org/ml/gcc-patches/2009-03/msg00319.html>
including the fix from
<http://gcc.gnu.org/ml/gcc-patches/2009-03/msg00402.html>
resulting in the patch below, plus the outstanding question quoted.

* Ralf Wildenhues wrote on Fri, Mar 06, 2009 at 08:00:20PM CET:
> Well, it doesn't matter much here to test only the C locale.
> 
> The thing I don't understand though is: the only locale settings
> I find in the current testsuite are in
>   g++.exp gcc-dg.exp gfortran.exp objc.exp
> 
> and I cannot see how they can possibly affect the locale on a remote
> target; dejagnu itself doesn't seem to have such settings in its .exp
> file either.


gcc/testsuite/ChangeLog:
2009-03-02  Ralf Wildenhues  <Ralf.Wildenhues@gmx.de>

	* gcc.misc-tests/help.exp: New file.

diff --git a/gcc/testsuite/gcc.misc-tests/help.exp b/gcc/testsuite/gcc.misc-tests/help.exp
new file mode 100644
index 0000000..2b9da94
--- /dev/null
+++ b/gcc/testsuite/gcc.misc-tests/help.exp
@@ -0,0 +1,127 @@
+# Copyright (C) 2005, 2007, 2009 Free Software Foundation, Inc.
+
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with GCC; see the file COPYING3.  If not see
+# <http://www.gnu.org/licenses/>.
+
+# We set LC_ALL and LANG to C so that we get the same error messages as expected.
+setenv LC_ALL C
+setenv LANG C
+
+# Run the LANGUAGE compiler with GCC_OPTIONS and inspect the compiler
+# output to make sure that they match the newline-separated patterns
+# in COMPILER_PATTERNS but not the patterns in COMPILER_NON_PATTERNS.
+# In case of failure, xfail if XFAIL is nonempty.
+
+proc check_for_help_options {language gcc_options compiler_patterns compiler_non_patterns xfail} {
+    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 }
+	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
+
+    foreach pattern [split $compiler_patterns "\n"] {
+	if {$pattern ne ""} {
+	    if {[regexp -- "$pattern" $gcc_output]} {
+		pass "$test $pattern"
+	    } else {
+		if {$xfail ne ""} {
+		    xfail "$test $pattern"
+		} else {
+		    fail "$test $pattern"
+		}
+	    }
+	}
+    }
+    foreach pattern [split $compiler_non_patterns "\n"] {
+	if {$pattern ne ""} {
+	    if {![regexp -- "$pattern" $gcc_output]} {
+		pass "$test $pattern"
+	    } else {
+		if {$xfail ne ""} {
+		    xfail "$test $pattern"
+		} else {
+		    fail "$test $pattern"
+		}
+	    }
+	}
+    }
+    pass $test
+}
+
+# Document --version.  No undocumented switches in --help.
+check_for_help_options c {--help} {--version} {This switch lacks documentation} {}
+
+# No intermingled output; pick up help strings from duplicate option flags
+check_for_help_options c {-v --help} {} {
+[^\n]The following options
+-Wconversion[^\n]*lacks documentation
+"  -g  "
+} {}
+
+# There are still undocumented switches in -v --help.
+check_for_help_options c {-v --help} {} {This switch lacks documentation} {xfail}
+
+# Multiline conversion in optc-gen.
+check_for_help_options c {-v --help} {} {are likely to\n  -std} {}
+
+# --help= classes and qualifiers.
+check_for_help_options c {--help=optimizers} {-O} {  -g  } {}
+check_for_help_options c {--help=params} {maximum number of} {-Wunsafe-loop-optimizations} {}
+check_for_help_options c {--help=C} {-ansi} {-gnatO} {}
+check_for_help_options c {--help=C++} {-std=c\+\+} {-gnatO} {}
+check_for_help_options c {--help=common} {-dumpbase} {-gnatO} {}
+check_for_help_options c {--help=undocumented} {This switch lacks documentation} {} {}
+
+# undocumented flags are not yet consistently marked as such.
+check_for_help_options c {--help=^undocumented} {-Wall} {This switch lacks documentation} {xfail}
+
+# Examples from the manual.
+check_for_help_options c {--help=target,undocumented} {} {} {}
+check_for_help_options c {--help=target,optimizers} {} {} {}
+check_for_help_options c {--help=warnings,^joined,^undocumented} {} {} {}
+check_for_help_options c {-Q -O2 --help=optimizers} {
+-O
+-ftree-vectorize[^\n]*disabled
+} {  -g  } {}
+check_for_help_options c {-Q -O3 --help=optimizers} {
+-O
+-ftree-vectorize[^\n]*enabled
+} {  -g  } {}
+# Repeated --help=
+check_for_help_options c {--help=params --help=optimizers} {
+maximum number of
+-O
+} {} {}
+
+# PR 37805
+check_for_help_options c {--help=joined} {Wformat=} {-fstrict-prototype} {}
+check_for_help_options c {--help=separate} {-MF} {-fstrict-prototype} {}
+check_for_help_options c {--help=warnings,joined} {Wformat=} {Wtrigraphs} {}
+check_for_help_options c {--help=warnings,^joined} {Wtrigraphs} {Wformat=} {}
+check_for_help_options c {--help=joined,separate} {-I} {} {}
+check_for_help_options c {--help=^joined,separate} {--param } {} {}
+check_for_help_options c {--help=joined,^separate} {--help=} {} {}
+check_for_help_options c {--help=joined,undocumented} {} {} {}
+# Listing only excludes gives empty results.
+check_for_help_options c {--help=^joined,^separate} {} {} {}