# - Try to find GDB
#
# Once done, this will define:
#  GDB_FOUND - system has GDB
#  GDB_COMMAND - the command to run
#  GDB_VERSION - version
#  GDB_HAS_RETURN_CHILD_RESULT - if the --return-child-result flag is supported
#
# Useful configuration variables you might want to add to your cache:
#  GDB_ROOT_DIR - A directory prefix to search
#
# Original Author:
# 2009-2010 Ryan Pavlik <rpavlik@iastate.edu> <abiryan@ryand.net>
# http://academic.cleardefinition.com
# Iowa State University HCI Graduate Program/VRAC
#
# Copyright Iowa State University 2009-2010.
# Distributed under the Boost Software License, Version 1.0.
# (See accompanying file LICENSE_1_0.txt or copy at
# http://www.boost.org/LICENSE_1_0.txt)


set(GDB_ROOT_DIR
    "${GDB_ROOT_DIR}"
    CACHE
    PATH
    "Directory to start our search in")

find_program(GDB_COMMAND
    NAMES
    gdb
    HINTS
    "${GDB_ROOT_DIR}"
    PATH_SUFFIXES
    bin
    libexec)

if(GDB_COMMAND)
    execute_process(COMMAND gdb --version
        COMMAND head -n 1
        OUTPUT_VARIABLE GDB_VERSION
        OUTPUT_STRIP_TRAILING_WHITESPACE)
    string(REGEX REPLACE "[^0-9]*([0-9]+[0-9.]*).*" "\\1" GDB_VERSION "${GDB_VERSION}")
endif()

# handle the QUIETLY and REQUIRED arguments and set xxx_FOUND to TRUE if
# all listed variables are TRUE
include(FindPackageHandleStandardArgs)
find_package_handle_standard_args(GDB DEFAULT_MSG GDB_COMMAND GDB_VERSION)

if(GDB_FOUND)
    mark_as_advanced(GDB_ROOT_DIR)
    if(GDB_VERSION VERSION_LESS 6.4)
        set(GDB_HAS_RETURN_CHILD_RESULT FALSE)
    else()
        set(GDB_HAS_RETURN_CHILD_RESULT TRUE)
    endif()
endif()

mark_as_advanced(GDB_COMMAND)
