# Copyright (C) 2009-2021 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

# Many hosts now default to a non-ASCII C locale, however, so
# they can set a charset encoding here if they need.
if { [ishost "*-*-cygwin*"] } {
  setenv LC_ALL C.ASCII
  setenv LANG C.ASCII
}

# Run the LANGUAGE compiler with GCC_OPTIONS and inspect the compiler
# output excluding EXCLUDE lines 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_options_with_filter { language gcc_options exclude \
					 compiler_patterns \
					 compiler_non_patterns \
					 expected_failure } {
    set test "compiler driver $gcc_options option(s):"
    set gcc_options "\{additional_flags=$gcc_options\}"

    switch "$language" {
	"c" {
	    set compiler cc1
	    set suffix c
	}
	"c++" {
	    set compiler cc1plus
	    set suffix cc
	}
	default { error "unknown language" }
    }

    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 {[regexp -- "compiler not installed on this system" $gcc_output]} {
	unsupported "$test: $language compiler not available"
	return
    }

    if { $exclude != "" } {
	set lines [split $gcc_output "\n"]
	set gcc_output ""
	foreach line $lines {
	    if {[regexp -line -- "$exclude" $line]} {
		continue
	    }
	    if { $gcc_output == "" } {
		set gcc_output "$line"
	    } else {
		set gcc_output "$gcc_output\n$line"
	    }
	}	
   }
    
    # Verify that COMPILER_PATTERNS appear in gcc output.
    foreach pattern [split $compiler_patterns "\n"] {
	if {$pattern != ""} {
	    if {[regexp -line -- "$pattern" $gcc_output]} {
		pass "$test $pattern"
	    } else {
		if {$expected_failure != ""} {
		    xfail "$test \"$pattern\" present in output"
		} else {
		    fail "$test \"$pattern\" present in output"
		}
	    }
	}
    }

    # Verify that COMPILER_NON_PATTERNS do not appear in gcc output.
    foreach pattern [split $compiler_non_patterns "\n"] {
	if {$pattern != ""} {
	    if {![regexp -line -- "$pattern" $gcc_output result]} {
		pass "$test $pattern"
	    } else {
		if {$expected_failure != ""} {
		    xfail "$test \"$pattern\" absent from output"
		} else {
		    # Print the unexpected line that caused the failure
		    # to make it easier to find in the multiline output.
		    fail "$test \"$pattern\" absent from output: \"$result\""
		}
	    }
	}
    }
}

# As check_for_options_with_filter, but without the EXCLUDE parameter.

proc check_for_options { language gcc_options compiler_patterns \
			     compiler_non_patterns expected_failure } {
    check_for_options_with_filter $language $gcc_options "" $compiler_patterns \
	$compiler_non_patterns $expected_failure
}