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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.
from SCons.Errors import UserError
from SCons.Tool import createSharedLibBuilder
from SCons.Util import CLVar
from . import lib_emitter, EmitLibSymlinks, StringizeLibSymlinks
def shlib_symlink_emitter(target, source, env, **kw):
verbose = False
if "variable_prefix" in kw:
var_prefix = kw["variable_prefix"]
else:
var_prefix = "SHLIB"
do_symlinks = env.subst("$%sNOVERSIONSYMLINKS" % var_prefix)
if do_symlinks in ["1", "True", "true", True]:
return target, source
shlibversion = env.subst("$%sVERSION" % var_prefix)
if shlibversion:
if verbose:
print("shlib_symlink_emitter: %sVERSION=%s" % (var_prefix, shlibversion))
libnode = target[0]
shlib_soname_symlink = env.subst(
"$%s_SONAME_SYMLINK" % var_prefix, target=target, source=source
)
shlib_noversion_symlink = env.subst(
"$%s_NOVERSION_SYMLINK" % var_prefix, target=target, source=source
)
if verbose:
print("shlib_soname_symlink :%s" % shlib_soname_symlink)
print("shlib_noversion_symlink :%s" % shlib_noversion_symlink)
print("libnode :%s" % libnode)
shlib_soname_symlink = env.File(shlib_soname_symlink)
shlib_noversion_symlink = env.File(shlib_noversion_symlink)
symlinks = []
if shlib_soname_symlink != libnode:
# If soname and library name machine, don't symlink them together
symlinks.append((env.File(shlib_soname_symlink), libnode))
symlinks.append((env.File(shlib_noversion_symlink), libnode))
if verbose:
print(
"_lib_emitter: symlinks={!r}".format(
", ".join(
["%r->%r" % (k, v) for k, v in StringizeLibSymlinks(symlinks)]
)
)
)
if symlinks:
# This does the actual symlinking
EmitLibSymlinks(env, symlinks, target[0])
# This saves the information so if the versioned shared library is installed
# it can faithfully reproduce the correct symlinks
target[0].attributes.shliblinks = symlinks
return target, source
def _soversion(target, source, env, for_signature):
"""Function to determine what to use for SOVERSION"""
if "SOVERSION" in env:
return ".$SOVERSION"
elif "SHLIBVERSION" in env:
shlibversion = env.subst("$SHLIBVERSION")
# We use only the most significant digit of SHLIBVERSION
return "." + shlibversion.split(".")[0]
else:
return ""
def _soname(target, source, env, for_signature):
if "SONAME" in env:
# Now verify that SOVERSION is not also set as that is not allowed
if "SOVERSION" in env:
raise UserError(
"Ambiguous library .so naming, both SONAME: %s and SOVERSION: %s are defined. "
"Only one can be defined for a target library."
% (env["SONAME"], env["SOVERSION"])
)
return "$SONAME"
else:
return "$SHLIBPREFIX$_get_shlib_stem${SHLIBSUFFIX}$_SHLIBSOVERSION"
def _get_shlib_stem(target, source, env, for_signature: bool) -> str:
"""Get the base name of a shared library.
Args:
target: target node containing the lib name
source: source node, not used
env: environment context for running subst
for_signature: whether this is being done for signature generation
Returns:
the library name without prefix/suffix
"""
verbose = False
target_name = str(target.name)
shlibprefix = env.subst("$SHLIBPREFIX")
shlibsuffix = env.subst("$_SHLIBSUFFIX")
if verbose and not for_signature:
print(
"_get_shlib_stem: target_name:%s shlibprefix:%s shlibsuffix:%s"
% (target_name, shlibprefix, shlibsuffix)
)
if shlibsuffix and target_name.endswith(shlibsuffix):
target_name = target_name[: -len(shlibsuffix)]
if shlibprefix and target_name.startswith(shlibprefix):
# skip pathological case were target _is_ the prefix
if target_name != shlibprefix:
target_name = target_name[len(shlibprefix) :]
if verbose and not for_signature:
print("_get_shlib_stem: target_name:%s AFTER" % (target_name,))
return target_name
def _get_shlib_dir(target, source, env, for_signature: bool) -> str:
"""Get the directory the shared library is in.
Args:
target: target node
source: source node, not used
env: environment context, not used
for_signature: whether this is being done for signature generation
Returns:
the directory the library will be in (empty string if '.')
"""
verbose = False
if target.dir and str(target.dir) != ".":
if verbose:
print("_get_shlib_dir: target.dir:%s" % target.dir)
return "%s/" % str(target.dir)
else:
return ""
def setup_shared_lib_logic(env):
"""Initialize an environment for shared library building.
Args:
env: environment to set up
"""
createSharedLibBuilder(env)
env["_get_shlib_stem"] = _get_shlib_stem
env["_get_shlib_dir"] = _get_shlib_dir
env["_SHLIBSOVERSION"] = _soversion
env["_SHLIBSONAME"] = _soname
env["SHLIBNAME"] = "${_get_shlib_dir}${SHLIBPREFIX}$_get_shlib_stem${_SHLIBSUFFIX}"
# This is the non versioned shlib filename
# If SHLIBVERSION is defined then this will symlink to $SHLIBNAME
env["SHLIB_NOVERSION_SYMLINK"] = "${_get_shlib_dir}${SHLIBPREFIX}$_get_shlib_stem${SHLIBSUFFIX}"
# This is the sonamed file name
# If SHLIBVERSION is defined then this will symlink to $SHLIBNAME
env["SHLIB_SONAME_SYMLINK"] = "${_get_shlib_dir}$_SHLIBSONAME"
# Note this is gnu style
env["SHLIBSONAMEFLAGS"] = "-Wl,-soname=$_SHLIBSONAME"
env["_SHLIBVERSION"] = "${SHLIBVERSION and '.'+SHLIBVERSION or ''}"
env["_SHLIBVERSIONFLAGS"] = "$SHLIBVERSIONFLAGS -Wl,-soname=$_SHLIBSONAME"
env["SHLIBEMITTER"] = [lib_emitter, shlib_symlink_emitter]
# If it's already set, then don't overwrite.
env["SHLIBPREFIX"] = env.get('SHLIBPREFIX', "lib")
env["_SHLIBSUFFIX"] = "${SHLIBSUFFIX}${_SHLIBVERSION}"
env["SHLINKFLAGS"] = CLVar("$LINKFLAGS -shared")
env["SHLINKCOM"] = "$SHLINK -o $TARGET $SHLINKFLAGS $__SHLIBVERSIONFLAGS $__RPATH $SOURCES $_LIBDIRFLAGS $_LIBFLAGS"
env["SHLINK"] = "$LINK"
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