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#   Copyright (C) 2009, 2010 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/>.
#

# This file contains the support procedures for testing the plugin mechanism.

load_lib dg.exp
load_lib gcc.exp

#
# plugin-get-options -- process test directives
#
# SRC is the full pathname of the plugin source file.
#
proc plugin-get-options { src } {
    # dg-options sets a variable called dg-extra-tool-flags.
    set dg-extra-tool-flags ""

    # dg-require-* sets dg-do-what.
    upvar dg-do-what dg-do-what 

    set tmp [dg-get-options $src]
    foreach op $tmp {
        set cmd [lindex $op 0]
        if { ![string compare "dg-options" $cmd] } {
            set status [catch "$op" errmsg]
            if { $status != 0 } {
                perror "src: $errmsg for \"$op\"\n"
                unresolved "$src: $errmsg for \"$op\""
                return
            }
        } else {
            # Ignore unrecognized dg- commands, but warn about them.
            warning "plugin.exp does not support $cmd"
        }
   }

    # Return flags to use for compiling the plugin source file
    return ${dg-extra-tool-flags}
}

#
# plugin-test-execute -- build the plugin first and then compile the
# test files with the plugin.
#
# PLUGIN_SRC is the full pathname of the plugin source file.
# PLUGIN_TESTS is a list of input test source files.
#
proc plugin-test-execute { plugin_src plugin_tests } {
    global srcdir objdir
    global verbose
    global GMPINC
    global PLUGINCC
    global PLUGINCFLAGS

    set basename [file tail $plugin_src]
    set base [file rootname $basename]
    set plugin_lib $base.so

    verbose "Test the plugin $basename" 1

    # Build the plugin itself
    set extra_flags [plugin-get-options $plugin_src]

    # Note that the plugin test support currently only works when the GCC
    # build tree is available. (We make sure that is the case in plugin.exp.)
    # Once we have figured out how/where to package/install GCC header files
    # for general plugin support, we should modify the following include paths
    # accordingly.
    set gcc_srcdir "$srcdir/../.."
    set gcc_objdir "$objdir/../../.."
    set includes "-I. -I${srcdir} -I${gcc_srcdir}/gcc -I${gcc_objdir}/gcc \
                  -I${gcc_srcdir}/include -I${gcc_srcdir}/libcpp/include \
                  $GMPINC -I${gcc_objdir}/intl"

    if { [ ishost *-*-darwin* ] } {
        # -mdynamic-no-pic is incompatible with -fPIC.
        set plug_cflags "" 
        foreach op $PLUGINCFLAGS {
            if { [string compare "-mdynamic-no-pic" $op] } {
                set plug_cflags [concat $plug_cflags " $op"]
            }
        }
        set optstr "$includes"
        foreach op $extra_flags {
            if { [string compare "-mdynamic-no-pic" $op] } {
                set optstr [concat $optstr " $op"]
            }
        }
        set optstr [concat $optstr "-DIN_GCC -fPIC -shared -undefined dynamic_lookup"]
    } else {
        set plug_cflags $PLUGINCFLAGS 
        set optstr "$includes $extra_flags -DIN_GCC -fPIC -shared"
    }

    # Temporarily switch to the environment for the plugin compiler.
    restore_ld_library_path_env_vars
    set status [remote_exec build "$PLUGINCC $plug_cflags $plugin_src $optstr -o $plugin_lib"]
    set status [lindex $status 0]
    set_ld_library_path_env_vars

    if { $status != 0 } then {
        unresolved "$basename compilation, $optstr"
        return
    }

    # Compile the input source files with the plugin
    global default_flags
    set plugin_enabling_flags "-fplugin=./$plugin_lib"
    dg-runtest $plugin_tests $plugin_enabling_flags $default_flags

    # Clean up
    remote_file build delete $plugin_lib
}