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# MIT License
#
# Copyright The SCons Foundation
#
# 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.
"""
Common link/shared library logic
"""
import SCons.Util
import SCons.Warnings
from SCons.Tool.DCommon import isD
from SCons.Util import is_List
issued_mixed_link_warning = False
def StringizeLibSymlinks(symlinks):
"""Converts list with pairs of nodes to list with pairs of node paths
(strings). Used mainly for debugging."""
if is_List(symlinks):
try:
return [(k.get_path(), v.get_path()) for k, v in symlinks]
except (TypeError, ValueError):
return symlinks
else:
return symlinks
def EmitLibSymlinks(env, symlinks, libnode, **kw):
"""Used by emitters to handle (shared/versioned) library symlinks"""
Verbose = False
# nodes involved in process... all symlinks + library
nodes = list(set([x for x, y in symlinks] + [libnode]))
clean_targets = kw.get('clean_targets', [])
if not is_List(clean_targets):
clean_targets = [clean_targets]
for link, linktgt in symlinks:
env.SideEffect(link, linktgt)
if Verbose:
print("EmitLibSymlinks: SideEffect(%r,%r)" % (link.get_path(), linktgt.get_path()))
clean_list = [x for x in nodes if x != linktgt]
env.Clean(list(set([linktgt] + clean_targets)), clean_list)
if Verbose:
print("EmitLibSymlinks: Clean(%r,%r)" % (linktgt.get_path(), [x.get_path() for x in clean_list]))
def CreateLibSymlinks(env, symlinks):
"""Physically creates symlinks. The symlinks argument must be a list in
form [ (link, linktarget), ... ], where link and linktarget are SCons
nodes.
"""
Verbose = False
for link, linktgt in symlinks:
linktgt = link.get_dir().rel_path(linktgt)
link = link.get_path()
if Verbose:
print("CreateLibSymlinks: preparing to add symlink %r -> %r" % (link, linktgt))
# Delete the (previously created) symlink if exists. Let only symlinks
# to be deleted to prevent accidental deletion of source files...
if env.fs.islink(link):
env.fs.unlink(link)
if Verbose:
print("CreateLibSymlinks: removed old symlink %r" % link)
# If a file or directory exists with the same name as link, an OSError
# will be thrown, which should be enough, I think.
env.fs.symlink(linktgt, link)
if Verbose:
print("CreateLibSymlinks: add symlink %r -> %r" % (link, linktgt))
return 0
def LibSymlinksActionFunction(target, source, env):
for tgt in target:
symlinks = getattr(getattr(tgt, 'attributes', None), 'shliblinks', None)
if symlinks:
CreateLibSymlinks(env, symlinks)
return 0
def LibSymlinksStrFun(target, source, env, *args):
cmd = None
for tgt in target:
symlinks = getattr(getattr(tgt, 'attributes', None), 'shliblinks', None)
if symlinks:
if cmd is None: cmd = ""
if cmd: cmd += "\n"
cmd += "Create symlinks for: %r\n " % tgt.get_path()
try:
linkstr = '\n '.join(["%r->%r" % (k, v) for k, v in StringizeLibSymlinks(symlinks)])
except (KeyError, ValueError):
pass
else:
cmd += "%s" % linkstr
return cmd
def _call_env_subst(env, string, *args, **kw):
kw2 = {}
for k in ('raw', 'target', 'source', 'conv', 'executor'):
try:
kw2[k] = kw[k]
except KeyError:
pass
return env.subst(string, *args, **kw2)
def smart_link(source, target, env, for_signature):
import SCons.Tool.cxx
import SCons.Tool.FortranCommon
has_cplusplus = SCons.Tool.cxx.iscplusplus(source)
has_fortran = SCons.Tool.FortranCommon.isfortran(env, source)
has_d = isD(env, source)
if has_cplusplus and has_fortran and not has_d:
global issued_mixed_link_warning
if not issued_mixed_link_warning:
msg = (
"Using $CXX to link Fortran and C++ code together.\n"
" This may generate a buggy executable if the '%s'\n"
" compiler does not know how to deal with Fortran runtimes."
)
SCons.Warnings.warn(
SCons.Warnings.FortranCxxMixWarning, msg % env.subst('$CXX')
)
issued_mixed_link_warning = True
return '$CXX'
elif has_d:
env['LINKCOM'] = env['DLINKCOM']
env['SHLINKCOM'] = env['SHDLINKCOM']
return '$DC'
elif has_fortran:
return '$FORTRAN'
elif has_cplusplus:
return '$CXX'
return '$CC'
def lib_emitter(target, source, env, **kw):
verbose = False
if verbose:
print("_lib_emitter: target[0]={!r}".format(target[0].get_path()))
for tgt in target:
if SCons.Util.is_String(tgt):
tgt = env.File(tgt)
tgt.attributes.shared = 1
return target, source
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