summaryrefslogtreecommitdiff
path: root/src/engine/SCons/Tool/link.py
blob: 2347c947e126924009d7f29516a1703f09a5f52f (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
"""SCons.Tool.link

Tool-specific initialization for the generic Posix linker.

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 (c) 2001 - 2019 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 __future__ import print_function

__revision__ = "src/engine/SCons/Tool/link.py 72ae09dc35ac2626f8ff711d8c4b30b6138e08e3 2019-08-08 14:50:06 bdeegan"

import sys
import re
import os

import SCons.Tool
import SCons.Util
import SCons.Warnings

from SCons.Tool.FortranCommon import isfortran

from SCons.Tool.DCommon import isD

from SCons.Tool.cxx import iscplusplus

issued_mixed_link_warning = False


def smart_link(source, target, env, for_signature):
    has_cplusplus = iscplusplus(source)
    has_fortran = 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 $CXX to link Fortran and C++ code together.\n\t" + \
                  "This may generate a buggy executable if the '%s'\n\t" + \
                  "compiler does not know how to deal with Fortran runtimes."
            SCons.Warnings.warn(SCons.Warnings.FortranCxxMixWarning,
                                msg % env.subst('$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

    try:
        symlink_generator = kw['symlink_generator']
    except KeyError:
        pass
    else:
        if Verbose:
            print("_lib_emitter: symlink_generator={!r}".format(symlink_generator))
        symlinks = symlink_generator(env, target[0])
        if Verbose:
            print("_lib_emitter: symlinks={!r}".format(symlinks))

        if symlinks:
            SCons.Tool.EmitLibSymlinks(env, symlinks, target[0])
            target[0].attributes.shliblinks = symlinks
    return (target, source)


def shlib_emitter(target, source, env):
    return _lib_emitter(target, source, env, symlink_generator=SCons.Tool.ShLibSymlinkGenerator)


def ldmod_emitter(target, source, env):
    return _lib_emitter(target, source, env, symlink_generator=SCons.Tool.LdModSymlinkGenerator)


# This is generic enough to be included here...
def _versioned_lib_name(env, libnode, version, prefix, suffix, prefix_generator, suffix_generator, **kw):
    """For libnode='/optional/dir/libfoo.so.X.Y.Z' it returns 'libfoo.so'"""
    Verbose = False

    if Verbose:
        print("_versioned_lib_name: libnode={!r}".format(libnode.get_path()))
        print("_versioned_lib_name: version={!r}".format(version))
        print("_versioned_lib_name: prefix={!r}".format(prefix))
        print("_versioned_lib_name: suffix={!r}".format(suffix))
        print("_versioned_lib_name: suffix_generator={!r}".format(suffix_generator))

    versioned_name = os.path.basename(libnode.get_path())
    if Verbose:
        print("_versioned_lib_name: versioned_name={!r}".format(versioned_name))

    versioned_prefix = prefix_generator(env, **kw)
    versioned_suffix = suffix_generator(env, **kw)
    if Verbose:
        print("_versioned_lib_name: versioned_prefix={!r}".format(versioned_prefix))
        print("_versioned_lib_name: versioned_suffix={!r}".format(versioned_suffix))

    versioned_prefix_re = '^' + re.escape(versioned_prefix)
    versioned_suffix_re = re.escape(versioned_suffix) + '$'
    name = re.sub(versioned_prefix_re, prefix, versioned_name)
    name = re.sub(versioned_suffix_re, suffix, name)
    if Verbose:
        print("_versioned_lib_name: name={!r}".format(name))
    return name


def _versioned_shlib_name(env, libnode, version, prefix, suffix, **kw):
    prefix_generator = SCons.Tool.ShLibPrefixGenerator
    suffix_generator = SCons.Tool.ShLibSuffixGenerator
    return _versioned_lib_name(env, libnode, version, prefix, suffix, prefix_generator, suffix_generator, **kw)


def _versioned_ldmod_name(env, libnode, version, prefix, suffix, **kw):
    prefix_generator = SCons.Tool.LdModPrefixGenerator
    suffix_generator = SCons.Tool.LdModSuffixGenerator
    return _versioned_lib_name(env, libnode, version, prefix, suffix, prefix_generator, suffix_generator, **kw)


def _versioned_lib_suffix(env, suffix, version):
    """For suffix='.so' and version='0.1.2' it returns '.so.0.1.2'"""
    Verbose = False
    if Verbose:
        print("_versioned_lib_suffix: suffix={!r}".format(suffix))
        print("_versioned_lib_suffix: version={!r}".format(version))
    if not suffix.endswith(version):
        suffix = suffix + '.' + version
    if Verbose:
        print("_versioned_lib_suffix: return suffix={!r}".format(suffix))
    return suffix


def _versioned_lib_soname(env, libnode, version, prefix, suffix, name_func):
    """For libnode='/optional/dir/libfoo.so.X.Y.Z' it returns 'libfoo.so.X'"""
    Verbose = False
    if Verbose:
        print("_versioned_lib_soname: version={!r}".format(version))
    name = name_func(env, libnode, version, prefix, suffix)
    if Verbose:
        print("_versioned_lib_soname: name={!r}".format(name))
    major = version.split('.')[0]
    soname = name + '.' + major
    if Verbose:
        print("_versioned_lib_soname: soname={!r}".format(soname))
    return soname


def _versioned_shlib_soname(env, libnode, version, prefix, suffix):
    return _versioned_lib_soname(env, libnode, version, prefix, suffix, _versioned_shlib_name)


def _versioned_ldmod_soname(env, libnode, version, prefix, suffix):
    return _versioned_lib_soname(env, libnode, version, prefix, suffix, _versioned_ldmod_name)


def _versioned_lib_symlinks(env, libnode, version, prefix, suffix, name_func, soname_func):
    """Generate link names that should be created for a versioned shared library.
       Returns a dictionary in the form { linkname : linktarget }
    """
    Verbose = False

    if Verbose:
        print("_versioned_lib_symlinks: libnode={!r}".format(libnode.get_path()))
        print("_versioned_lib_symlinks: version={!r}".format(version))

    if sys.platform.startswith('openbsd'):
        # OpenBSD uses x.y shared library versioning numbering convention
        # and doesn't use symlinks to backwards-compatible libraries
        if Verbose:
            print("_versioned_lib_symlinks: return symlinks={!r}".format(None))
        return None

    linkdir = libnode.get_dir()
    if Verbose:
        print("_versioned_lib_symlinks: linkdir={!r}".format(linkdir.get_path()))

    name = name_func(env, libnode, version, prefix, suffix)
    if Verbose:
        print("_versioned_lib_symlinks: name={!r}".format(name))

    soname = soname_func(env, libnode, version, prefix, suffix)
    if Verbose:
        print("_versioned_lib_symlinks: soname={!r}".format(soname))

    link0 = env.fs.File(soname, linkdir)
    link1 = env.fs.File(name, linkdir)

    # We create direct symlinks, not daisy-chained.
    if link0 == libnode:
        # This enables SHLIBVERSION without periods (e.g. SHLIBVERSION=1)
        symlinks = [(link1, libnode)]
    else:
        # This handles usual SHLIBVERSION, i.e. '1.2', '1.2.3', etc.
        symlinks = [(link0, libnode), (link1, libnode)]

    if Verbose:
        print("_versioned_lib_symlinks: return symlinks={!r}".format(SCons.Tool.StringizeLibSymlinks(symlinks)))

    return symlinks


def _versioned_shlib_symlinks(env, libnode, version, prefix, suffix):
    name_func = env['LINKCALLBACKS']['VersionedShLibName']
    soname_func = env['LINKCALLBACKS']['VersionedShLibSoname']

    return _versioned_lib_symlinks(env, libnode, version, prefix, suffix, name_func, soname_func)


def _versioned_ldmod_symlinks(env, libnode, version, prefix, suffix):
    name_func = _versioned_ldmod_name
    soname_func = _versioned_ldmod_soname

    name_func = env['LINKCALLBACKS']['VersionedLdModName']
    soname_func = env['LINKCALLBACKS']['VersionedLdModSoname']

    return _versioned_lib_symlinks(env, libnode, version, prefix, suffix, name_func, soname_func)


def _versioned_lib_callbacks():
    return {
        'VersionedShLibSuffix': _versioned_lib_suffix,
        'VersionedLdModSuffix': _versioned_lib_suffix,
        'VersionedShLibSymlinks': _versioned_shlib_symlinks,
        'VersionedLdModSymlinks': _versioned_ldmod_symlinks,
        'VersionedShLibName': _versioned_shlib_name,
        'VersionedLdModName': _versioned_ldmod_name,
        'VersionedShLibSoname': _versioned_shlib_soname,
        'VersionedLdModSoname': _versioned_ldmod_soname,
    }.copy()


def _setup_versioned_lib_variables(env, **kw):
    """
    Setup all variables required by the versioning machinery
    """

    tool = None
    try:
        tool = kw['tool']
    except KeyError:
        pass

    use_soname = False
    try:
        use_soname = kw['use_soname']
    except KeyError:
        pass

    # The $_SHLIBVERSIONFLAGS define extra commandline flags used when
    # building VERSIONED shared libraries. It's always set, but used only
    # when VERSIONED library is built (see __SHLIBVERSIONFLAGS in SCons/Defaults.py).
    if use_soname:
        # If the linker uses SONAME, then we need this little automata
        if tool == 'sunlink':
            env['_SHLIBVERSIONFLAGS'] = '$SHLIBVERSIONFLAGS -h $_SHLIBSONAME'
            env['_LDMODULEVERSIONFLAGS'] = '$LDMODULEVERSIONFLAGS -h $_LDMODULESONAME'
        else:
            env['_SHLIBVERSIONFLAGS'] = '$SHLIBVERSIONFLAGS -Wl,-soname=$_SHLIBSONAME'
            env['_LDMODULEVERSIONFLAGS'] = '$LDMODULEVERSIONFLAGS -Wl,-soname=$_LDMODULESONAME'
        env['_SHLIBSONAME'] = '${ShLibSonameGenerator(__env__,TARGET)}'
        env['_LDMODULESONAME'] = '${LdModSonameGenerator(__env__,TARGET)}'
        env['ShLibSonameGenerator'] = SCons.Tool.ShLibSonameGenerator
        env['LdModSonameGenerator'] = SCons.Tool.LdModSonameGenerator
    else:
        env['_SHLIBVERSIONFLAGS'] = '$SHLIBVERSIONFLAGS'
        env['_LDMODULEVERSIONFLAGS'] = '$LDMODULEVERSIONFLAGS'

    # LDOMDULVERSIONFLAGS should always default to $SHLIBVERSIONFLAGS
    env['LDMODULEVERSIONFLAGS'] = '$SHLIBVERSIONFLAGS'


def generate(env):
    """Add Builders and construction variables for gnulink to an Environment."""
    SCons.Tool.createSharedLibBuilder(env)
    SCons.Tool.createProgBuilder(env)

    env['SHLINK'] = '$LINK'
    env['SHLINKFLAGS'] = SCons.Util.CLVar('$LINKFLAGS -shared')
    env['SHLINKCOM'] = '$SHLINK -o $TARGET $SHLINKFLAGS $__SHLIBVERSIONFLAGS $__RPATH $SOURCES $_LIBDIRFLAGS $_LIBFLAGS'

    # don't set up the emitter, because AppendUnique will generate a list
    # starting with None :-(
    env.Append(SHLIBEMITTER=[shlib_emitter])

    env['SMARTLINK'] = smart_link
    env['LINK'] = "$SMARTLINK"
    env['LINKFLAGS'] = SCons.Util.CLVar('')

    # __RPATH is only set to something ($_RPATH typically) on platforms that support it.
    env['LINKCOM'] = '$LINK -o $TARGET $LINKFLAGS $__RPATH $SOURCES $_LIBDIRFLAGS $_LIBFLAGS'
    env['LIBDIRPREFIX'] = '-L'
    env['LIBDIRSUFFIX'] = ''
    env['_LIBFLAGS'] = '${_stripixes(LIBLINKPREFIX, LIBS, LIBLINKSUFFIX, LIBPREFIXES, LIBSUFFIXES, __env__)}'
    env['LIBLINKPREFIX'] = '-l'
    env['LIBLINKSUFFIX'] = ''

    if env['PLATFORM'] == 'hpux':
        env['SHLIBSUFFIX'] = '.sl'
    elif env['PLATFORM'] == 'aix':
        env['SHLIBSUFFIX'] = '.a'

    # For most platforms, a loadable module is the same as a shared
    # library.  Platforms which are different can override these, but
    # setting them the same means that LoadableModule works everywhere.
    SCons.Tool.createLoadableModuleBuilder(env)
    env['LDMODULE'] = '$SHLINK'
    env.Append(LDMODULEEMITTER=[ldmod_emitter])
    env['LDMODULEPREFIX'] = '$SHLIBPREFIX'
    env['LDMODULESUFFIX'] = '$SHLIBSUFFIX'
    env['LDMODULEFLAGS'] = '$SHLINKFLAGS'
    env[
        'LDMODULECOM'] = '$LDMODULE -o $TARGET $LDMODULEFLAGS $__LDMODULEVERSIONFLAGS $__RPATH $SOURCES $_LIBDIRFLAGS $_LIBFLAGS'
    env['LDMODULEVERSION'] = '$SHLIBVERSION'
    env['LDMODULENOVERSIONSYMLINKS'] = '$SHLIBNOVERSIONSYMLINKS'


def exists(env):
    # This module isn't really a Tool on its own, it's common logic for
    # other linkers.
    return None

# Local Variables:
# tab-width:4
# indent-tabs-mode:nil
# End:
# vim: set expandtab tabstop=4 shiftwidth=4: