# libstdc++ "tool init file" for DejaGNU

# Copyright (C) 2001, 2002, 2003, 2004 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 2 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 this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  


# Define callbacks and load other libraries.  This file is loaded relatively
# early, and before any other file we write ourselves.  "load_lib" will
# find anything in the DejaGNU installation tree, or in our lib directory.
# "load_gcc_lib" will search the core compiler's .exp collection instead.
#
# The naming rule is that dg.exp looks for "tool-" and runtest.exp looks
# for "tool_" when finding callbacks.  Utility routines we define for
# our callbacks begin with "v3-".
#
# libstdc++_* callbacks we don't define, but could:
# ..._option_help           prints additional --help output
# ..._option_proc (--foo)   process our own options
# ..._init (normal.exp)     called once per test file
# ..._finish                bracketing function for libstdc++_init
# ...-dg-prune              removing output text, see top of system dg.exp
#
# Useful hook:  if ${hostname}_init exists, it will be called, almost
# the last thing before testing begins.  This can be defined in, e.g.,
# ~/.dejagnurc or $DEJAGNU.

proc load_gcc_lib { filename } {
    global srcdir
    load_file $srcdir/../../gcc/testsuite/lib/$filename
}

# system routines
load_lib dg.exp
load_lib libgloss.exp
# compiler routines, then ours
load_gcc_lib target-supports.exp
load_gcc_lib target-supports-dg.exp
load_lib prune.exp
load_lib dg-options.exp
load_gcc_lib target-libpath.exp
load_gcc_lib wrapper.exp

# Useful for debugging.  Pass the name of a variable and the verbosity
# threshold (number of -v's on the command line).
proc v3track { var n } {
    upvar $var val
    verbose "++ $var is $val" $n
}

# Called by v3-init below.  "Static" to this file.
proc v3-copy-files {srcfiles} {
    foreach f $srcfiles {
        if { [catch { set symlink [file readlink $f] } x] } then {
	    remote_download target $f
        } else {
            if { [regexp "^/" "$symlink"] } then {
		remote_download target $symlink
            } else {
                set dirname [file dirname $f]
		remote_download target $dirname/$symlink
            }
        }
    }
}

# Called once, during runtest.exp setup.
proc libstdc++_init { testfile } {
    global env
    global srcdir blddir objdir tool_root_dir
    global cxx cxxflags
    global includes
    global gluefile wrap_flags
    global ld_library_path
    global target_triplet

    # 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

    set blddir [lookfor_file [get_multilibs] libstdc++-v3]
    set flags_file "${blddir}/scripts/testsuite_flags"
    v3track flags_file 2

    # If a test doesn't have special options, use DEFAULT_CXXFLAGS.
    # Use this variable if the behavior
    #   1) only applies to libstdc++ testing
    #   2) might need to be negated 
    # In particular, some tests have to be run without precompiled
    # headers, or without assertions.
    global DEFAULT_CXXFLAGS
    if ![info exists DEFAULT_CXXFLAGS] then {
	set DEFAULT_CXXFLAGS ""
	# Host specific goo here.
	if { [string match "powerpc-*-darwin*" $target_triplet] } {
	    append DEFAULT_CXXFLAGS " -multiply_defined suppress"
	} 
    }
    v3track DEFAULT_CXXFLAGS 2

    # By default, we assume we want to run program images.
    global dg-do-what-default
    set dg-do-what-default run

    # Copy any required data files.
    v3-copy-files [glob -nocomplain "$srcdir/data/*.tst"]
    v3-copy-files [glob -nocomplain "$srcdir/data/*.txt"]

    # Locate libgcc.a so we don't need to account for different values of
    # SHLIB_EXT on different platforms
    set gccdir [lookfor_file $tool_root_dir gcc/libgcc.a]
    if {$gccdir != ""} {
        set gccdir [file dirname $gccdir]
    }
    v3track gccdir 3

    # Compute what needs to be added to the existing LD_LIBRARY_PATH.
    if {$gccdir != ""} {
	set ld_library_path ""
	append ld_library_path ":${gccdir}"
	set compiler ${gccdir}/g++
	append ld_library_path ":${blddir}/src/.libs"

	if { [is_remote host] == 0 && [which $compiler] != 0 } {
	  foreach i "[exec $compiler --print-multi-lib]" {
	    set mldir ""
	    regexp -- "\[a-z0-9=/\.-\]*;" $i mldir
	    set mldir [string trimright $mldir "\;@"]
	    if { "$mldir" == "." } {
	      continue
	    }
	    if { [llength [glob -nocomplain ${gccdir}/${mldir}/libgcc_s*.so.*]] >= 1 } {
	      append ld_library_path ":${gccdir}/${mldir}"
	    }
	  }
	}

	set_ld_library_path_env_vars
	if [info exists env(LD_LIBRARY_PATH)] {
	  verbose -log "LD_LIBRARY_PATH = $env(LD_LIBRARY_PATH)"
	}
    } else {
	set compiler [transform "g++"]
    }

    # Do a bunch of handstands and backflips for cross compiling and
    # finding simulators...
    if [is_remote host] {
        set header [remote_download host ${blddir}/testsuite/testsuite_hooks.h]
        if { $header == "" } {
            verbose -log "Unable to download ${blddir}/testsuite/testsuite_hooks.h to host."
            return "untested"
        }
      set cxx [transform "g++"]
      set cxxflags "-ggdb3"
      set includes "-I./"
    } else {
        # If we find a testsuite_flags file, we're testing in the build dir.
        if { [file exists $flags_file] } {
            set cxx [exec sh $flags_file --build-cxx]
            set cxxflags [exec sh $flags_file --cxxflags]
            set includes [exec sh $flags_file --build-includes]
        } else {
            set cxx [transform "g++"]
            set cxxflags "-g -O2 -D_GLIBCXX_ASSERT -fmessage-length=0" 
            set includes "-I${srcdir}"
	    # Guess at the location of the installed locale files.
	    # (It would be nice if "gcc --print-file-name" could find
	    # message files, but it cannot.)
	    set absolute_cxx [which $cxx]
	    if { $absolute_cxx != "" } {
		set localedir "[file dirname $absolute_cxx]/../share/locale"
	    }
	    set cxxflags "$cxxflags -DLOCALEDIR=\"$localedir\""
        }
    }

    # If a PCH file is available, use it.  We must delay performing
    # this check until $cxx and such have been initialized because we
    # perform a test compilation.  (Ideally, gcc --print-file-name would
    # list PCH files, but it does not.)
    global PCH_CXXFLAGS
    if ![info exists PCH_CXXFLAGS] then {
	set src "config[pid].cc"
	set f [open $src "w"]
	puts $f "int main () {}"
	close $f

	set lines [v3_target_compile $src "config[pid].o" object \
		   "additional_flags=-include additional_flags=bits/stdc++.h"]
	if {$lines == "" } {
	    set PCH_CXXFLAGS "-include bits/stdc++.h"
	} else {
	    set PCH_CXXFLAGS ""
	}
	file delete $src
	v3track PCH_CXXFLAGS 2
    }

    libstdc++_maybe_build_wrapper "${objdir}/testglue.o"
}

# Callback for cleanup routines.
proc libstdc++_exit { } {
    global gluefile;

    if [info exists gluefile] {
	file_on_build delete $gluefile;
	unset gluefile;
    }
}

# Callback from system dg-test.
proc libstdc++-dg-test { prog do_what extra_tool_flags } {
    # Set up the compiler flags, based on what we're going to do.
    switch $do_what {
        "preprocess" {
            set compile_type "preprocess"
            set output_file "[file rootname [file tail $prog]].i"
        }
        "compile" {
            set compile_type "assembly"
            set output_file "[file rootname [file tail $prog]].s"
        }
        "assemble" {
            set compile_type "object"
            set output_file "[file rootname [file tail $prog]].o"
        }
        "link" {
            set compile_type "executable"
            set output_file "./[file rootname [file tail $prog]].exe"
        }
        "run" {
            set compile_type "executable"
            # FIXME: "./" is to cope with "." not being in $PATH.
            # Should this be handled elsewhere?
            # YES.
            set output_file "./[file rootname [file tail $prog]].exe"
            # This is the only place where we care if an executable was
            # created or not.  If it was, dg.exp will try to run it.
            remote_file build delete $output_file;
        }
        default {
            perror "$do_what: not a valid dg-do keyword"
            return ""
        }
    }
    set options ""
    if { $extra_tool_flags != "" } {
        lappend options "additional_flags=$extra_tool_flags"
    }

    # There is a libstdc++_compile made for us by default (via the tool-
    # and-target file), but the defaults are lacking in goodness.
    set comp_output [v3_target_compile "$prog" "$output_file" "$compile_type" $options];
    set comp_output [ prune_g++_output $comp_output ];

    return [list $comp_output $output_file]
}

# True if the library supports wchar_t.
set v3-wchar_t 0

# True if the library supports threads.
set v3-threads 0

# True if the library supports symbol versioning.
set v3-symver 0

# A string naming object files to be linked into all tests.
set v3-test_objs ""

# Called from libstdc++-dg-test above.  Calls back into system's
# target_compile to actually do the work.
proc v3_target_compile { source dest type options } {
    global gluefile 
    global wrap_flags
    global cxx
    global cxxflags
    global includes
    global blddir
    global v3-test_objs

    if { [target_info needs_status_wrapper] != "" && [info exists gluefile] } {
        lappend options "libs=${gluefile}"
        lappend options "ldflags=${wrap_flags}"
    }

    set cxx_final $cxx
    set cxxlibglossflags  [libgloss_link_flags]
    set cxx_final [concat $cxx_final $cxxlibglossflags]
    set cxx_final [concat $cxx_final $cxxflags]
    set cxx_final [concat $cxx_final $includes]
    # Link the support objects into executables.
    if { $type == "executable" } {
	set cxx_final [concat $cxx_final ${v3-test_objs}]
    }

    lappend options "compiler=$cxx_final"

    return [target_compile $source $dest $type $options]
}


# XXX Fix me.
# This is a complete hack: why do we build libv3test.a and then not use it?
# This duplicates all the make logic. Boo: pick one way to do it, not two.
# Build the support objects linked in with the libstdc++ tests.  In
# addition, set v3-wchar_t, v3-threads, v3-test_objs, and v3-symver
# appropriately.
proc v3-build_support {} {
    global srcdir
    global v3-wchar_t
    global v3-threads
    global v3-test_objs
    global v3-symver

    # Figure out whether or not the library supports certain features.
    set v3-wchar_t 0
    set v3-threads 0
    set v3-symver 0
    set v3-test_objs ""

    set config_src "config.cc"
    set f [open $config_src "w"]
    puts $f "#include <bits/c++config.h>"
    puts $f "#include <bits/gthr.h>"
    close $f
    set preprocessed [v3_target_compile $config_src "" \
	    	       preprocess "additional_flags=-dN"]
    if { [string first "_GLIBCXX_USE_WCHAR_T" $preprocessed] != -1 } {
	verbose -log "wchar_t support detected"
	set v3-wchar_t 1
    }
    if { [string first "_GLIBCXX_SYMVER" $preprocessed] != -1 } {
	verbose -log "symbol versioning support detected"
	set v3-symver 1
    }
    if { [string first "__GTHREADS" $preprocessed] != -1 } {
	verbose -log "thread support detected"
	set v3-threads 1
    }

    # Build the support objects.
    set source_files \
	[list testsuite_abi.cc testsuite_allocator.cc testsuite_character.cc testsuite_hooks.cc]
    foreach f $source_files {
	set object_file [file rootname $f].o
	# Compile with "-w" so that warnings issued by the compiler
	# do not prevent compilation.
	if { [v3_target_compile $srcdir/$f $object_file "object" \
		  [list "incdir=$srcdir" "additional_flags=-w"]]
	     != "" } {
	    error "could not compile $f"
	}
	append v3-test_objs "$object_file "
    }
}