1 files changed, 613 insertions, 0 deletions
diff --git a/3rdParty/SCons/scons-3.0.1/engine/SCons/Tool/intelc.py b/3rdParty/SCons/scons-3.0.1/engine/SCons/Tool/intelc.py
new file mode 100644
index 0000000..02da912
--- /dev/null
+++ b/3rdParty/SCons/scons-3.0.1/engine/SCons/Tool/intelc.py
@@ -0,0 +1,613 @@
+"""SCons.Tool.icl
+
+Tool-specific initialization for the Intel C/C++ compiler.
+Supports Linux and Windows compilers, v7 and up.
+
+There normally shouldn't be any need to import this module directly.
+It will usually be imported through the generic SCons.Tool.Tool()
+selection method.
+
+"""
+
+#
+# __COPYRIGHT__
+#
+# Permission is hereby granted, free of charge, to any person obtaining
+# a copy of this software and associated documentation files (the
+# "Software"), to deal in the Software without restriction, including
+# without limitation the rights to use, copy, modify, merge, publish,
+# distribute, sublicense, and/or sell copies of the Software, and to
+# permit persons to whom the Software is furnished to do so, subject to
+# the following conditions:
+#
+# The above copyright notice and this permission notice shall be included
+# in all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY
+# KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
+# WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+from __future__ import division, print_function
+
+__revision__ = "__FILE__ __REVISION__ __DATE__ __DEVELOPER__"
+
+import math, sys, os.path, glob, string, re
+
+is_windows = sys.platform == 'win32'
+is_win64 = is_windows and (os.environ['PROCESSOR_ARCHITECTURE'] == 'AMD64' or 
+                           ('PROCESSOR_ARCHITEW6432' in os.environ and
+                            os.environ['PROCESSOR_ARCHITEW6432'] == 'AMD64'))
+is_linux = sys.platform.startswith('linux')
+is_mac     = sys.platform == 'darwin'
+
+if is_windows:
+    import SCons.Tool.msvc
+elif is_linux:
+    import SCons.Tool.gcc
+elif is_mac:
+    import SCons.Tool.gcc
+import SCons.Util
+import SCons.Warnings
+
+# Exceptions for this tool
+class IntelCError(SCons.Errors.InternalError):
+    pass
+class MissingRegistryError(IntelCError): # missing registry entry
+    pass
+class MissingDirError(IntelCError):     # dir not found
+    pass
+class NoRegistryModuleError(IntelCError): # can't read registry at all
+    pass
+
+def linux_ver_normalize(vstr):
+    """Normalize a Linux compiler version number.
+    Intel changed from "80" to "9.0" in 2005, so we assume if the number
+    is greater than 60 it's an old-style number and otherwise new-style.
+    Always returns an old-style float like 80 or 90 for compatibility with Windows.
+    Shades of Y2K!"""
+    # Check for version number like 9.1.026: return 91.026
+    # XXX needs to be updated for 2011+ versions (like 2011.11.344 which is compiler v12.1.5)
+    m = re.match(r'([0-9]+)\.([0-9]+)\.([0-9]+)', vstr)
+    if m:
+        vmaj,vmin,build = m.groups()
+        return float(vmaj) * 10. + float(vmin) + float(build) / 1000.;
+    else:
+        f = float(vstr)
+        if is_windows:
+            return f
+        else:
+            if f < 60: return f * 10.0
+            else: return f
+
+def check_abi(abi):
+    """Check for valid ABI (application binary interface) name,
+    and map into canonical one"""
+    if not abi:
+        return None
+    abi = abi.lower()
+    # valid_abis maps input name to canonical name
+    if is_windows:
+        valid_abis = {'ia32'  : 'ia32',
+                      'x86'   : 'ia32',
+                      'ia64'  : 'ia64',
+                      'em64t' : 'em64t',
+                      'amd64' : 'em64t'}
+    if is_linux:
+        valid_abis = {'ia32'   : 'ia32',
+                      'x86'    : 'ia32',
+                      'x86_64' : 'x86_64',
+                      'em64t'  : 'x86_64',
+                      'amd64'  : 'x86_64'}
+    if is_mac:
+        valid_abis = {'ia32'   : 'ia32',
+                      'x86'    : 'ia32',
+                      'x86_64' : 'x86_64',
+                      'em64t'  : 'x86_64'}
+    try:
+        abi = valid_abis[abi]
+    except KeyError:
+        raise SCons.Errors.UserError("Intel compiler: Invalid ABI %s, valid values are %s"% \
+              (abi, list(valid_abis.keys())))
+    return abi
+
+def vercmp(a, b):
+    """Compare strings as floats,
+    but Intel changed Linux naming convention at 9.0"""
+    return cmp(linux_ver_normalize(b), linux_ver_normalize(a))
+
+def get_version_from_list(v, vlist):
+    """See if we can match v (string) in vlist (list of strings)
+    Linux has to match in a fuzzy way."""
+    if is_windows:
+        # Simple case, just find it in the list
+        if v in vlist: return v
+        else: return None
+    else:
+        # Fuzzy match: normalize version number first, but still return
+        # original non-normalized form.
+        fuzz = 0.001
+        for vi in vlist:
+            if math.fabs(linux_ver_normalize(vi) - linux_ver_normalize(v)) < fuzz:
+                return vi
+        # Not found
+        return None
+
+def get_intel_registry_value(valuename, version=None, abi=None):
+    """
+    Return a value from the Intel compiler registry tree. (Windows only)
+    """
+    # Open the key:
+    if is_win64:
+        K = 'Software\\Wow6432Node\\Intel\\Compilers\\C++\\' + version + '\\'+abi.upper()
+    else:
+        K = 'Software\\Intel\\Compilers\\C++\\' + version + '\\'+abi.upper()
+    try:
+        k = SCons.Util.RegOpenKeyEx(SCons.Util.HKEY_LOCAL_MACHINE, K)
+    except SCons.Util.RegError:
+        # For version 13 and later, check UUID subkeys for valuename
+        if is_win64:
+            K = 'Software\\Wow6432Node\\Intel\\Suites\\' + version + "\\Defaults\\C++\\" + abi.upper()
+        else:
+            K = 'Software\\Intel\\Suites\\' + version + "\\Defaults\\C++\\" + abi.upper()
+        try:
+            k = SCons.Util.RegOpenKeyEx(SCons.Util.HKEY_LOCAL_MACHINE, K)
+            uuid = SCons.Util.RegQueryValueEx(k, 'SubKey')[0]
+
+            if is_win64:
+                K = 'Software\\Wow6432Node\\Intel\\Suites\\' + version + "\\" + uuid + "\\C++"
+            else:
+                K = 'Software\\Intel\\Suites\\' + version + "\\" + uuid + "\\C++"
+            k = SCons.Util.RegOpenKeyEx(SCons.Util.HKEY_LOCAL_MACHINE, K)
+
+            try:
+                v = SCons.Util.RegQueryValueEx(k, valuename)[0]
+                return v  # or v.encode('iso-8859-1', 'replace') to remove unicode?
+            except SCons.Util.RegError:
+                if abi.upper() == 'EM64T':
+                    abi = 'em64t_native'
+                if is_win64:
+                    K = 'Software\\Wow6432Node\\Intel\\Suites\\' + version + "\\" + uuid + "\\C++\\" + abi.upper()
+                else:
+                    K = 'Software\\Intel\\Suites\\' + version + "\\" + uuid + "\\C++\\" + abi.upper()
+                k = SCons.Util.RegOpenKeyEx(SCons.Util.HKEY_LOCAL_MACHINE, K)
+
+            try:
+                v = SCons.Util.RegQueryValueEx(k, valuename)[0]
+                return v  # or v.encode('iso-8859-1', 'replace') to remove unicode?
+            except SCons.Util.RegError:
+                raise MissingRegistryError("%s was not found in the registry, for Intel compiler version %s, abi='%s'"%(K, version,abi))
+
+        except SCons.Util.RegError:
+            raise MissingRegistryError("%s was not found in the registry, for Intel compiler version %s, abi='%s'"%(K, version,abi))
+        except SCons.Util.WinError:
+            raise MissingRegistryError("%s was not found in the registry, for Intel compiler version %s, abi='%s'"%(K, version,abi))
+
+    # Get the value:
+    try:
+        v = SCons.Util.RegQueryValueEx(k, valuename)[0]
+        return v  # or v.encode('iso-8859-1', 'replace') to remove unicode?
+    except SCons.Util.RegError:
+        raise MissingRegistryError("%s\\%s was not found in the registry."%(K, valuename))
+
+
+def get_all_compiler_versions():
+    """Returns a sorted list of strings, like "70" or "80" or "9.0"
+    with most recent compiler version first.
+    """
+    versions=[]
+    if is_windows:
+        if is_win64:
+            keyname = 'Software\\WoW6432Node\\Intel\\Compilers\\C++'
+        else:
+            keyname = 'Software\\Intel\\Compilers\\C++'
+        try:
+            k = SCons.Util.RegOpenKeyEx(SCons.Util.HKEY_LOCAL_MACHINE,
+                                        keyname)
+        except SCons.Util.WinError:
+            # For version 13 or later, check for default instance UUID
+            if is_win64:
+                keyname = 'Software\\WoW6432Node\\Intel\\Suites'
+            else:
+                keyname = 'Software\\Intel\\Suites'
+            try:
+                k = SCons.Util.RegOpenKeyEx(SCons.Util.HKEY_LOCAL_MACHINE,
+                                            keyname)
+            except SCons.Util.WinError:
+                return []
+        i = 0
+        versions = []
+        try:
+            while i < 100:
+                subkey = SCons.Util.RegEnumKey(k, i) # raises EnvironmentError
+                # Check that this refers to an existing dir.
+                # This is not 100% perfect but should catch common
+                # installation issues like when the compiler was installed
+                # and then the install directory deleted or moved (rather
+                # than uninstalling properly), so the registry values
+                # are still there.
+                if subkey == 'Defaults': # Ignore default instances
+                    i = i + 1
+                    continue
+                ok = False
+                for try_abi in ('IA32', 'IA32e',  'IA64', 'EM64T'):
+                    try:
+                        d = get_intel_registry_value('ProductDir', subkey, try_abi)
+                    except MissingRegistryError:
+                        continue  # not found in reg, keep going
+                    if os.path.exists(d): ok = True
+                if ok:
+                    versions.append(subkey)
+                else:
+                    try:
+                        # Registry points to nonexistent dir.  Ignore this
+                        # version.
+                        value = get_intel_registry_value('ProductDir', subkey, 'IA32')
+                    except MissingRegistryError as e:
+
+                        # Registry key is left dangling (potentially
+                        # after uninstalling).
+
+                        print("scons: *** Ignoring the registry key for the Intel compiler version %s.\n" \
+                            "scons: *** It seems that the compiler was uninstalled and that the registry\n" \
+                            "scons: *** was not cleaned up properly.\n" % subkey)
+                    else:
+                        print("scons: *** Ignoring "+str(value))
+
+                i = i + 1
+        except EnvironmentError:
+            # no more subkeys
+            pass
+    elif is_linux or is_mac:
+        for d in glob.glob('/opt/intel_cc_*'):
+            # Typical dir here is /opt/intel_cc_80.
+            m = re.search(r'cc_(.*)$', d)
+            if m:
+                versions.append(m.group(1))
+        for d in glob.glob('/opt/intel/cc*/*'):
+            # Typical dir here is /opt/intel/cc/9.0 for IA32,
+            # /opt/intel/cce/9.0 for EMT64 (AMD64)
+            m = re.search(r'([0-9][0-9.]*)$', d)
+            if m:
+                versions.append(m.group(1))
+        for d in glob.glob('/opt/intel/Compiler/*'):
+            # Typical dir here is /opt/intel/Compiler/11.1
+            m = re.search(r'([0-9][0-9.]*)$', d)
+            if m:
+                versions.append(m.group(1))
+        for d in glob.glob('/opt/intel/composerxe-*'):
+            # Typical dir here is /opt/intel/composerxe-2011.4.184
+            m = re.search(r'([0-9][0-9.]*)$', d)
+            if m:
+                versions.append(m.group(1))
+        for d in glob.glob('/opt/intel/composer_xe_*'):
+            # Typical dir here is /opt/intel/composer_xe_2011_sp1.11.344
+            # The _sp1 is useless, the installers are named 2011.9.x, 2011.10.x, 2011.11.x
+            m = re.search(r'([0-9]{0,4})(?:_sp\d*)?\.([0-9][0-9.]*)$', d)
+            if m:
+                versions.append("%s.%s"%(m.group(1), m.group(2)))
+        for d in glob.glob('/opt/intel/compilers_and_libraries_*'):
+            # JPA: For the new version of Intel compiler 2016.1.
+            m = re.search(r'([0-9]{0,4})(?:_sp\d*)?\.([0-9][0-9.]*)$', d)
+            if m:
+                versions.append("%s.%s"%(m.group(1), m.group(2)))
+            
+    def keyfunc(str):
+        """Given a dot-separated version string, return a tuple of ints representing it."""
+        return [int(x) for x in str.split('.')]
+    # split into ints, sort, then remove dups
+    return sorted(SCons.Util.unique(versions), key=keyfunc, reverse=True)
+
+def get_intel_compiler_top(version, abi):
+    """
+    Return the main path to the top-level dir of the Intel compiler,
+    using the given version.
+    The compiler will be in <top>/bin/icl.exe (icc on linux),
+    the include dir is <top>/include, etc.
+    """
+
+    if is_windows:
+        if not SCons.Util.can_read_reg:
+            raise NoRegistryModuleError("No Windows registry module was found")
+        top = get_intel_registry_value('ProductDir', version, abi)
+        archdir={'x86_64': 'intel64',
+                 'amd64' : 'intel64',
+                 'em64t' : 'intel64',
+                 'x86'   : 'ia32',
+                 'i386'  : 'ia32',
+                 'ia32'  : 'ia32'
+        }[abi] # for v11 and greater
+        # pre-11, icl was in Bin.  11 and later, it's in Bin/<abi> apparently.
+        if not os.path.exists(os.path.join(top, "Bin", "icl.exe")) \
+              and not os.path.exists(os.path.join(top, "Bin", abi, "icl.exe")) \
+              and not os.path.exists(os.path.join(top, "Bin", archdir, "icl.exe")):
+            raise MissingDirError("Can't find Intel compiler in %s"%(top))
+    elif is_mac or is_linux:
+        def find_in_2008style_dir(version):
+            # first dir is new (>=9.0) style, second is old (8.0) style.
+            dirs=('/opt/intel/cc/%s', '/opt/intel_cc_%s')
+            if abi == 'x86_64':
+                dirs=('/opt/intel/cce/%s',)  # 'e' stands for 'em64t', aka x86_64 aka amd64
+            top=None
+            for d in dirs:
+                if os.path.exists(os.path.join(d%version, "bin", "icc")):
+                    top = d%version
+                    break
+            return top
+        def find_in_2010style_dir(version):
+            dirs=('/opt/intel/Compiler/%s/*'%version)
+            # typically /opt/intel/Compiler/11.1/064 (then bin/intel64/icc)
+            dirs=glob.glob(dirs)
+            # find highest sub-version number by reverse sorting and picking first existing one.
+            dirs.sort()
+            dirs.reverse()
+            top=None
+            for d in dirs:
+                if (os.path.exists(os.path.join(d, "bin", "ia32", "icc")) or
+                    os.path.exists(os.path.join(d, "bin", "intel64", "icc"))):
+                    top = d
+                    break
+            return top
+        def find_in_2011style_dir(version):
+            # The 2011 (compiler v12) dirs are inconsistent, so just redo the search from
+            # get_all_compiler_versions and look for a match (search the newest form first)
+            top=None
+            for d in glob.glob('/opt/intel/composer_xe_*'):
+                # Typical dir here is /opt/intel/composer_xe_2011_sp1.11.344
+                # The _sp1 is useless, the installers are named 2011.9.x, 2011.10.x, 2011.11.x
+                m = re.search(r'([0-9]{0,4})(?:_sp\d*)?\.([0-9][0-9.]*)$', d)
+                if m:
+                    cur_ver = "%s.%s"%(m.group(1), m.group(2))
+                    if cur_ver == version and \
+                        (os.path.exists(os.path.join(d, "bin", "ia32", "icc")) or
+                        os.path.exists(os.path.join(d, "bin", "intel64", "icc"))):
+                        top = d
+                        break
+            if not top:
+                for d in glob.glob('/opt/intel/composerxe-*'):
+                    # Typical dir here is /opt/intel/composerxe-2011.4.184
+                    m = re.search(r'([0-9][0-9.]*)$', d)
+                    if m and m.group(1) == version and \
+                        (os.path.exists(os.path.join(d, "bin", "ia32", "icc")) or
+                        os.path.exists(os.path.join(d, "bin", "intel64", "icc"))):
+                            top = d
+                            break
+            return top
+        def find_in_2016style_dir(version):
+            # The 2016 (compiler v16) dirs are inconsistent from previous.
+            top = None
+            for d in glob.glob('/opt/intel/compilers_and_libraries_%s/linux'%version):
+                if os.path.exists(os.path.join(d, "bin", "ia32", "icc")) or os.path.exists(os.path.join(d, "bin", "intel64", "icc")):
+                    top = d
+                    break
+            return top
+                    
+        top = find_in_2016style_dir(version) or find_in_2011style_dir(version) or find_in_2010style_dir(version) or find_in_2008style_dir(version)
+        # print "INTELC: top=",top
+        if not top:
+            raise MissingDirError("Can't find version %s Intel compiler in %s (abi='%s')"%(version,top, abi))
+    return top
+
+
+def generate(env, version=None, abi=None, topdir=None, verbose=0):
+    """Add Builders and construction variables for Intel C/C++ compiler
+    to an Environment.
+    args:
+      version: (string) compiler version to use, like "80"
+      abi:     (string) 'win32' or whatever Itanium version wants
+      topdir:  (string) compiler top dir, like
+                         "c:\Program Files\Intel\Compiler70"
+                        If topdir is used, version and abi are ignored.
+      verbose: (int)    if >0, prints compiler version used.
+    """
+    if not (is_mac or is_linux or is_windows):
+        # can't handle this platform
+        return
+
+    if is_windows:
+        SCons.Tool.msvc.generate(env)
+    elif is_linux:
+        SCons.Tool.gcc.generate(env)
+    elif is_mac:
+        SCons.Tool.gcc.generate(env)
+
+    # if version is unspecified, use latest
+    vlist = get_all_compiler_versions()
+    if not version:
+        if vlist:
+            version = vlist[0]
+    else:
+        # User may have specified '90' but we need to get actual dirname '9.0'.
+        # get_version_from_list does that mapping.
+        v = get_version_from_list(version, vlist)
+        if not v:
+            raise SCons.Errors.UserError("Invalid Intel compiler version %s: "%version + \
+                  "installed versions are %s"%(', '.join(vlist)))
+        version = v
+
+    # if abi is unspecified, use ia32
+    # alternatives are ia64 for Itanium, or amd64 or em64t or x86_64 (all synonyms here)
+    abi = check_abi(abi)
+    if abi is None:
+        if is_mac or is_linux:
+            # Check if we are on 64-bit linux, default to 64 then.
+            uname_m = os.uname()[4]
+            if uname_m == 'x86_64':
+                abi = 'x86_64'
+            else:
+                abi = 'ia32'
+        else:
+            if is_win64:
+                abi = 'em64t'
+            else:
+                abi = 'ia32'
+
+    if version and not topdir:
+        try:
+            topdir = get_intel_compiler_top(version, abi)
+        except (SCons.Util.RegError, IntelCError):
+            topdir = None
+
+    if not topdir:
+        # Normally this is an error, but it might not be if the compiler is
+        # on $PATH and the user is importing their env.
+        class ICLTopDirWarning(SCons.Warnings.Warning):
+            pass
+        if (is_mac or is_linux) and not env.Detect('icc') or \
+           is_windows and not env.Detect('icl'):
+
+            SCons.Warnings.enableWarningClass(ICLTopDirWarning)
+            SCons.Warnings.warn(ICLTopDirWarning,
+                                "Failed to find Intel compiler for version='%s', abi='%s'"%
+                                (str(version), str(abi)))
+        else:
+            # should be cleaned up to say what this other version is
+            # since in this case we have some other Intel compiler installed
+            SCons.Warnings.enableWarningClass(ICLTopDirWarning)
+            SCons.Warnings.warn(ICLTopDirWarning,
+                                "Can't find Intel compiler top dir for version='%s', abi='%s'"%
+                                    (str(version), str(abi)))
+
+    if topdir:
+        archdir={'x86_64': 'intel64',
+                 'amd64' : 'intel64',
+                 'em64t' : 'intel64',
+                 'x86'   : 'ia32',
+                 'i386'  : 'ia32',
+                 'ia32'  : 'ia32'
+        }[abi] # for v11 and greater
+        if os.path.exists(os.path.join(topdir, 'bin', archdir)):
+            bindir="bin/%s"%archdir
+            libdir="lib/%s"%archdir
+        else:
+            bindir="bin"
+            libdir="lib"
+        if verbose:
+            print("Intel C compiler: using version %s (%g), abi %s, in '%s/%s'"%\
+                  (repr(version), linux_ver_normalize(version),abi,topdir,bindir))
+            if is_linux:
+                # Show the actual compiler version by running the compiler.
+                os.system('%s/%s/icc --version'%(topdir,bindir))
+            if is_mac:
+                # Show the actual compiler version by running the compiler.
+                os.system('%s/%s/icc --version'%(topdir,bindir))
+
+        env['INTEL_C_COMPILER_TOP'] = topdir
+        if is_linux:
+            paths={'INCLUDE'         : 'include',
+                   'LIB'             : libdir,
+                   'PATH'            : bindir,
+                   'LD_LIBRARY_PATH' : libdir}
+            for p in list(paths.keys()):
+                env.PrependENVPath(p, os.path.join(topdir, paths[p]))
+        if is_mac:
+            paths={'INCLUDE'         : 'include',
+                   'LIB'             : libdir,
+                   'PATH'            : bindir,
+                   'LD_LIBRARY_PATH' : libdir}
+            for p in list(paths.keys()):
+                env.PrependENVPath(p, os.path.join(topdir, paths[p]))
+        if is_windows:
+            #       env key    reg valname   default subdir of top
+            paths=(('INCLUDE', 'IncludeDir', 'Include'),
+                   ('LIB'    , 'LibDir',     'Lib'),
+                   ('PATH'   , 'BinDir',     'Bin'))
+            # We are supposed to ignore version if topdir is set, so set
+            # it to the emptry string if it's not already set.
+            if version is None:
+                version = ''
+            # Each path has a registry entry, use that or default to subdir
+            for p in paths:
+                try:
+                    path=get_intel_registry_value(p[1], version, abi)
+                    # These paths may have $(ICInstallDir)
+                    # which needs to be substituted with the topdir.
+                    path=path.replace('$(ICInstallDir)', topdir + os.sep)
+                except IntelCError:
+                    # Couldn't get it from registry: use default subdir of topdir
+                    env.PrependENVPath(p[0], os.path.join(topdir, p[2]))
+                else:
+                    env.PrependENVPath(p[0], path.split(os.pathsep))
+                    # print "ICL %s: %s, final=%s"%(p[0], path, str(env['ENV'][p[0]]))
+
+    if is_windows:
+        env['CC']        = 'icl'
+        env['CXX']       = 'icl'
+        env['LINK']      = 'xilink'
+    else:
+        env['CC']        = 'icc'
+        env['CXX']       = 'icpc'
+        # Don't reset LINK here;
+        # use smart_link which should already be here from link.py.
+        #env['LINK']      = '$CC'
+        env['AR']        = 'xiar'
+        env['LD']        = 'xild' # not used by default
+
+    # This is not the exact (detailed) compiler version,
+    # just the major version as determined above or specified
+    # by the user.  It is a float like 80 or 90, in normalized form for Linux
+    # (i.e. even for Linux 9.0 compiler, still returns 90 rather than 9.0)
+    if version:
+        env['INTEL_C_COMPILER_VERSION']=linux_ver_normalize(version)
+
+    if is_windows:
+        # Look for license file dir
+        # in system environment, registry, and default location.
+        envlicdir = os.environ.get("INTEL_LICENSE_FILE", '')
+        K = ('SOFTWARE\Intel\Licenses')
+        try:
+            k = SCons.Util.RegOpenKeyEx(SCons.Util.HKEY_LOCAL_MACHINE, K)
+            reglicdir = SCons.Util.RegQueryValueEx(k, "w_cpp")[0]
+        except (AttributeError, SCons.Util.RegError):
+            reglicdir = ""
+        defaultlicdir = r'C:\Program Files\Common Files\Intel\Licenses'
+
+        licdir = None
+        for ld in [envlicdir, reglicdir]:
+            # If the string contains an '@', then assume it's a network
+            # license (port@system) and good by definition.
+            if ld and (ld.find('@') != -1 or os.path.exists(ld)):
+                licdir = ld
+                break
+        if not licdir:
+            licdir = defaultlicdir
+            if not os.path.exists(licdir):
+                class ICLLicenseDirWarning(SCons.Warnings.Warning):
+                    pass
+                SCons.Warnings.enableWarningClass(ICLLicenseDirWarning)
+                SCons.Warnings.warn(ICLLicenseDirWarning,
+                                    "Intel license dir was not found."
+                                    "  Tried using the INTEL_LICENSE_FILE environment variable (%s), the registry (%s) and the default path (%s)."
+                                    "  Using the default path as a last resort."
+                                        % (envlicdir, reglicdir, defaultlicdir))
+        env['ENV']['INTEL_LICENSE_FILE'] = licdir
+
+def exists(env):
+    if not (is_mac or is_linux or is_windows):
+        # can't handle this platform
+        return 0
+
+    try:
+        versions = get_all_compiler_versions()
+    except (SCons.Util.RegError, IntelCError):
+        versions = None
+    detected = versions is not None and len(versions) > 0
+    if not detected:
+        # try env.Detect, maybe that will work
+        if is_windows:
+            return env.Detect('icl')
+        elif is_linux:
+            return env.Detect('icc')
+        elif is_mac:
+            return env.Detect('icc')
+    return detected
+
+# end of file
+
+# Local Variables:
+# tab-width:4
+# indent-tabs-mode:nil
+# End:
+# vim: set expandtab tabstop=4 shiftwidth=4: