# Copyright (C) 2017-2020 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/>.

#
# DejaGnu does not have proper library search paths for load_lib.
# We have to explicitly load everything that gdc.exp wants to load.
#

proc load_gcc_lib { filename } {
    global srcdir loaded_libs

    load_file $srcdir/../../gcc/testsuite/lib/$filename
    set loaded_libs($filename) ""
}

load_lib dg.exp
load_lib libgloss.exp

load_gcc_lib target-supports.exp
load_gcc_lib target-supports-dg.exp
load_gcc_lib dg-options.exp
load_gcc_lib target-libpath.exp
load_gcc_lib timeout.exp
load_gcc_lib wrapper.exp
load_gcc_lib target-utils.exp
load_gcc_lib gcc-defs.exp

set TESTING_IN_BUILD_TREE 1

# Define libphobos callbacks for dg.exp.

proc libphobos-dg-test { prog do_what extra_tool_flags } {
    set compile_type ""
    set output_file ""

    global libphobos_test_name
    upvar name name
    if { $libphobos_test_name != "" } {
	set name $libphobos_test_name
    }

    # Set up the compiler flags, based on what we're going to do.
    switch $do_what {
	"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.
	    catch { remote_file build delete $output_file }
	}
	"link" {
	    set compile_type "executable"
	    set output_file "./[file rootname [file tail $prog]].exe"
	}
	default {
	    perror "$do_what: not a valid dg-do keyword"
	    return ""
	}
    }

    set select_compile "libphobos_target_compile"
    set options ""
    if { $extra_tool_flags != "" } {
	lappend options "additional_flags=$extra_tool_flags"
    }

    set unsupported_message [libphobos_skipped_test_p $name]
    if { $unsupported_message != "" } {
	return [list "::unsupported::$unsupported_message" $output_file]
    }

    set comp_output [$select_compile "$prog" "$output_file" "$compile_type" $options]
    return [list $comp_output $output_file]
}

proc libphobos-dg-prune { system text } {
    return $text
}

#
# libphobos_init
#

proc libphobos_init { args } {
    global env
    global srcdir blddir objdir tool_root_dir
    global exeext
    global gdc gdcflags
    global gdcpaths gdcldflags
    global gluefile wrap_flags
    global ld_library_path
    global DEFAULT_DFLAGS

    # If a testcase doesn't have special options, use these.
    if ![info exists DEFAULT_DFLAGS] then {
	set DEFAULT_DFLAGS ""
    }

    # By default, we assume we want to run program images.
    global dg-do-what-default
    if [isnative] {
	set dg-do-what-default "run"
    } else {
	set dg-do-what-default "link"
    }

    # What arguments to pass to run program images.
    global libphobos_run_args
    set libphobos_run_args ""

    # If the name of the test should be something else.
    global libphobos_test_name
    set libphobos_test_name ""

    global libphobos_skip_tests
    set libphobos_skip_tests { }

    # Default settings.
    set blddir [lookfor_file [get_multilibs] libphobos]
    set flags_file "${blddir}/testsuite/testsuite_flags"
    set shlib_ext [get_shlib_extension]

    set gdc [transform "gdc"]
    set gdcflags "-fmessage-length=0"
    set gdcpaths "-I${srcdir}"
    set gdcldflags ""

    if { [file exists $flags_file] } {
	set gdc [exec sh $flags_file --gdc]
	set gdcflags [exec sh $flags_file --gdcflags]
	set gdcpaths [exec sh $flags_file --gdcpaths]
	set gdcldflags [exec sh $flags_file --gdcldflags]
    }

    set exeext ""
    if [info exists env(EXEEXT)] {
	set exeext $env(EXEEXT)
    }

    # Compute what needs to be added to the existing LD_LIBRARY_PATH.
    set ld_library_path "."

    set gccdir [lookfor_file $tool_root_dir gcc/libgcc.a]
    if {$gccdir != ""} {
	set gccdir [file dirname $gccdir]
	append ld_library_path ":${gccdir}"
    }

    if { [file exists "${blddir}/src/.libs/libgphobos.${shlib_ext}"] } {
	append ld_library_path ":${blddir}/src/.libs"
    }

    # Compute what needs to be added to the existing LD_LIBRARY_PATH.
    if {$gccdir != ""} {
	set compiler ${gccdir}/gdc

	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

    libphobos_maybe_build_wrapper "${objdir}/testglue.o"
}

#
# libphobos_target_compile -- compile a source file.
#

proc libphobos_target_compile { source dest type options } {
    global gdc gdcflags
    global gdcpaths gdcldflags
    global gluefile wrap_flags

    lappend options "additional_flags=-fno-diagnostics-show-caret -fdiagnostics-color=never"

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

    # Flag setting based on type argument.
    if { $type == "executable" } {
	# Link the support objects into executables.
	lappend options "additional_flags=$gdcldflags"
    }

    # Set the compiler, only add D flags and paths if building D sources.
    set gdc_final $gdc
    if [regexp ".*\.d\$" $source] {
	set gdc_final [concat $gdc_final $gdcflags]
	set gdc_final [concat $gdc_final $gdcpaths]
    }

    lappend options "compiler=$gdc_final"
    lappend options "timeout=[timeout_value]"

    set options [dg-additional-files-options $options $source]
    set comp_output [target_compile $source $dest $type $options]

    return $comp_output
}

#
# Helper used by libphobos and libdruntime unittest runner, filters out
# D sources that may contain a unittest function.
#

proc filter_libphobos_unittests { list } {
    set res {}
    foreach filename $list {
	set fid [open $filename r]
	if [regexp -- {unittest} [read $fid [file size $filename]]] {
	    lappend res $filename
	}
	close $fid
    }
    return $res
}

# Skip the unittest (report it as UNSUPPORTED) if the module exists in
# libphobos_skip_tests and its target list is matched by dg-process-target.
#
# The expected format of the libphobos_skip_tests file is:
# { test { targets } }
proc libphobos_skipped_test_p { test } {
    global libphobos_skip_tests

    set row [lsearch -inline -index 0 $libphobos_skip_tests $test]
    if { $row eq "" } {
	return ""
    }

    if { [llength $row] != 2 } {
	error "syntax error in libphobos_skip_tests: $row"
    }

    set selector [list target [lindex $row 1]]
    if { [dg-process-target-1 $selector] != "S" } {
	return ""
    }

    return "skipped test"
}

# Return true if the curl library is supported on the target.
proc check_effective_target_libcurl_available { } {
    return [check_no_compiler_messages libcurl_available executable {
	int main (void) { return 0; }
    } "-lcurl"]
}

# Return true if the target is linux version < 2.6.39
proc check_effective_target_linux_pre_2639 { } {
    if { ![istarget *-*-linux*] } {
	return 0
    }

    if { [check_no_compiler_messages linux_pre_2639 assembly {
	#include <linux/version.h>
	#if !defined LINUX_VERSION_CODE || LINUX_VERSION_CODE < KERNEL_VERSION(2,6,39)
	#error Yes, it is.
	#endif
    }] } {
	return 0
    }
    return 1
}