def main(argv):
env.update(EXTRA_ENV)
ParseArgs(argv, PATTERNS)
inputs = env.get('INPUTS')
if len(inputs) == 0:
Log.Fatal("No input files given")
for infile in inputs:
env.push()
env.set('input', infile)
if filetype.IsLLVMBitcode(infile):
# Hack to support newlib build.
# Newlib determines whether the toolchain supports .init_array, etc., by
# compiling a small test and looking for a specific section tidbit using
# "readelf -S". Since pnacl compiles to bitcode, readelf isn't available.
# (there is a line: "if ${READELF} -S conftest | grep -e INIT_ARRAY"
# in newlib's configure file).
# TODO(sehr): we may want to implement a whole readelf on bitcode.
flags = env.get('FLAGS')
if len(flags) == 1 and flags[0] == '-S':
print 'INIT_ARRAY'
return 0
Log.Fatal('Cannot handle pnacl-readelf %s' % str(argv))
return 1
Run('"${READELF}" ${FLAGS} ${input}')
env.pop()
# only reached in case of no errors
return 0
def main(argv):
env.update(EXTRA_ENV)
ParseArgs(argv, LDPatterns)
GetArch(required=True)
inputs = env.get('INPUTS')
output = env.getone('OUTPUT')
if output == '':
output = pathtools.normalize('a.out')
# Expand all parameters
# This resolves -lfoo into actual filenames,
# and expands linker scripts into command-line arguments.
inputs = ldtools.ExpandInputs(inputs, env.get('SEARCH_DIRS'),
env.getbool('STATIC'),
ldtools.LibraryTypes.NATIVE)
env.push()
env.set('inputs', *inputs)
env.set('output', output)
if env.getbool('SANDBOXED'):
RunLDSandboxed()
else:
Run('${RUN_LD}')
env.pop()
# only reached in case of no errors
return 0
def main(argv):
if len(argv) == 0:
print get_help(argv)
return 1
env.update(EXTRA_ENV)
ParseArgs(argv, PATTERNS)
Run('"${RANLIB}" --plugin=${GOLD_PLUGIN_SO} ${ARGS}')
# only reached in case of no errors
return 0
def main(argv):
env.update(EXTRA_ENV)
ParseArgs(argv, LDPatterns)
GetArch(required=True)
inputs = env.get('INPUTS')
output = env.getone('OUTPUT')
if output == '':
output = pathtools.normalize('a.out')
# As we will modify the output file in-place for non-SFI, we output
# the file to a temporary file first and then rename it. Otherwise,
# build systems such as make assume the output file is ready even
# if the last build failed during the in-place update.
tmp_output = output + '.tmp'
# Expand all parameters
# This resolves -lfoo into actual filenames,
# and expands linker scripts into command-line arguments.
inputs = ldtools.ExpandInputs(inputs, env.get('SEARCH_DIRS'), True,
ldtools.LibraryTypes.NATIVE)
env.push()
env.set('inputs', *inputs)
env.set('output', tmp_output)
if env.getbool('SANDBOXED'):
RunLDSandboxed()
else:
Run('${RUN_LD}')
if env.getbool('NONSFI_NACL'):
# Remove PT_INTERP in non-SFI binaries as we never use host's
# dynamic linker/loader.
#
# This is necessary otherwise we get a statically linked
# executable that is not directly runnable by Linux, because Linux
# tries to load the non-existent file that PT_INTERP points to.
#
# This is fairly hacky. It would be better if the linker provided
# an option for omitting PT_INTERP (e.g. "--dynamic-linker ''").
RemoveInterpProgramHeader(tmp_output)
if driver_tools.IsWindowsPython() and os.path.exists(output):
# On Windows (but not on Unix), the os.rename() call would fail if the
# output file already exists.
os.remove(output)
os.rename(tmp_output, output)
env.pop()
# only reached in case of no errors
return 0
def main(argv):
env.update(EXTRA_ENV)
ParseArgs(argv, LDPatterns)
# If the user passed -arch, then they want native output.
arch_flag_given = GetArch() is not None
# Both LD_FLAGS_NATIVE and TRANSLATE_FLAGS_USER affect
# the translation process. If they are non-empty,
# then --pnacl-allow-native must be given.
allow_native = env.getbool('ALLOW_NATIVE')
native_flags = env.get('LD_FLAGS_NATIVE') + env.get('TRANSLATE_FLAGS_USER')
if len(native_flags) > 0:
if not allow_native:
flagstr = ' '.join(native_flags)
Log.Fatal('"%s" affects translation. '
'To allow, specify --pnacl-allow-native' % flagstr)
if allow_native:
if not arch_flag_given:
Log.Fatal("--pnacl-allow-native given, but translation "
"is not happening (missing -arch?)")
if env.getbool('SHARED'):
Log.Fatal('Native shared libraries are not supported with pnacl-ld.')
if env.getbool('SHARED'):
if env.getbool('RELOCATABLE'):
Log.Fatal('-r/-relocatable and -shared may not be passed together.')
env.set('RELOCATABLE', '1')
# Overriding the lib target uses native-flavored bitcode libs rather than the
# portable bitcode libs. It is currently only tested/supported for
# building the IRT.
if not IsPortable():
env.set('BASE_USR', "${BASE_USR_ARCH}")
env.set('BASE_LIB', "${BASE_LIB_ARCH}")
if env.getbool('RELOCATABLE'):
env.set('STATIC', '0')
inputs = env.get('INPUTS')
output = env.getone('OUTPUT')
if output == '':
output = pathtools.normalize('a.out')
if not arch_flag_given:
# If -arch is not given, assume X86-32.
# This is because gold requires an arch (even for bitcode linking).
SetArch('X8632')
assert(GetArch() is not None)
inputs = FixPrivateLibs(inputs)
# Expand all parameters
# This resolves -lfoo into actual filenames,
# and expands linker scripts into command-line arguments.
inputs = ldtools.ExpandInputs(inputs,
env.get('SEARCH_DIRS'),
env.getbool('STATIC'),
# Once all glibc bitcode link is purely
# bitcode (e.g., even libc_nonshared.a)
# we may be able to restrict this more.
# This is also currently used by
# pnacl_generate_pexe=0 with glibc,
# for user libraries.
ldtools.LibraryTypes.ANY)
plls, inputs = FilterPlls(inputs)
plls = [os.path.basename(pll) for pll in plls]
if not env.getbool('SHARED') and plls != []:
Log.Fatal('Passing a PLL to the linker requires the "-shared" option.')
# Make sure the inputs have matching arch.
CheckInputsArch(inputs)
regular_inputs, native_objects = SplitLinkLine(inputs)
if env.getbool('RELOCATABLE'):
bitcode_type = 'po'
native_type = 'o'
else:
bitcode_type = 'pexe'
native_type = 'nexe'
if native_objects and not allow_native:
argstr = ' '.join(native_objects)
Log.Fatal("Native objects '%s' detected in the link. "
"To allow, specify --pnacl-allow-native" % argstr)
tng = TempNameGen([], output)
# Do the bitcode link.
if HasBitcodeInputs(inputs):
chain = DriverChain(inputs, output, tng)
chain.add(LinkBC, 'pre_opt.' + bitcode_type)
# Some ABI simplification passes assume the whole program is
# available (e.g. -expand-varargs, -nacl-expand-ctors and
# -nacl-expand-tls). While we could try running a subset of
# simplification passes when linking native objects, we don't
# do this because it complicates testing. For example,
# it requires '-expand-constant-expr' to be able to handle
# 'landingpad' instructions.
# However, if we aren't using biased bitcode, then at least -expand-byval
# must be run to work with the PPAPI shim calling convention, and
# -expand-varargs is needed because after LLVM 3.5 the x86-32 backend does
# not expand the llvm.va_arg intrinsic correctly.
# (see https://code.google.com/p/nativeclient/issues/detail?id=3913#c24)
abi_simplify = (env.getbool('STATIC') and
len(native_objects) == 0 and
not env.getbool('ALLOW_NEXE_BUILD_ID') and
IsPortable())
still_need_expand_byval = IsPortable() and env.getbool('STATIC')
still_need_expand_varargs = (still_need_expand_byval and
len(native_objects) == 0)
# A list of groups of args. Each group should contain a pass to run
# along with relevant flags that go with that pass.
opt_args = []
if env.getbool('SHARED'):
pre_simplify_shared = [
# The following is a subset of "-pnacl-abi-simplify-preopt". We don't
# want to run the full "-pnacl-abi-simplify-preopt" because it
# internalizes symbols that we want to export via "-convert-to-pso".
'-nacl-global-cleanup',
'-expand-varargs',
'-rewrite-pnacl-library-calls',
'-rewrite-llvm-intrinsic-calls',
'-convert-to-pso',
]
# ConvertToPso takes a list of comma-separated PLL dependencies as an
# argument.
if plls != []:
pre_simplify_shared += ['-convert-to-pso-deps=' + ','.join(plls)]
opt_args.append(pre_simplify_shared)
# Post-opt is required, since '-convert-to-pso' adds metadata which must
# be simplified before finalization. Additionally, all functions must be
# simplified in the post-opt passes.
abi_simplify = True
elif abi_simplify:
pre_simplify = ['-pnacl-abi-simplify-preopt']
if env.getone('CXX_EH_MODE') == 'sjlj':
pre_simplify += ['-enable-pnacl-sjlj-eh']
else:
assert env.getone('CXX_EH_MODE') == 'none'
opt_args.append(pre_simplify)
else:
# '-lowerinvoke' prevents use of C++ exception handling, which
# is not yet supported in the PNaCl ABI. '-simplifycfg' removes
# landingpad blocks made unreachable by '-lowerinvoke'.
#
# We run this in order to remove 'resume' instructions,
# otherwise these are translated to calls to _Unwind_Resume(),
# which will not be available at native link time.
opt_args.append(['-lowerinvoke', '-simplifycfg'])
if still_need_expand_varargs:
opt_args.append(['-expand-varargs'])
if env.getone('OPT_LEVEL') != '' and env.getone('OPT_LEVEL') != '0':
opt_args.append(env.get('OPT_FLAGS'))
if env.getone('STRIP_MODE') != 'none':
opt_args.append(env.get('STRIP_FLAGS'))
if abi_simplify:
post_simplify = ['-pnacl-abi-simplify-postopt']
if not env.getbool('DISABLE_ABI_CHECK'):
post_simplify += [
'-verify-pnaclabi-module',
'-verify-pnaclabi-functions',
# A flag for the above -verify-pnaclabi-* passes.
'-pnaclabi-allow-debug-metadata']
opt_args.append(post_simplify)
elif still_need_expand_byval:
# We may still need -expand-byval to match the PPAPI shim
# calling convention.
opt_args.append(['-expand-byval'])
if len(opt_args) != 0:
if env.getbool('RUN_PASSES_SEPARATELY'):
for i, group in enumerate(opt_args):
chain.add(DoLLVMPasses(group),
'simplify_%d.%s' % (i, bitcode_type))
else:
flattened_opt_args = [flag for group in opt_args for flag in group]
chain.add(DoLLVMPasses(flattened_opt_args),
'simplify_and_opt.' + bitcode_type)
else:
chain = DriverChain('', output, tng)
if env.getbool('FINALIZE'):
chain.add(DoFinalize, 'finalize.' + bitcode_type)
# If -arch is also specified, invoke pnacl-translate afterwards.
if arch_flag_given:
env.set('NATIVE_OBJECTS', *native_objects)
chain.add(DoTranslate, native_type)
chain.run()
if bitcode_type == 'pexe' and not arch_flag_given:
# Mark .pexe files as executable.
# Some versions of 'configure' expect this.
SetExecutableMode(output)
return 0
def main(argv):
env.update(EXTRA_ENV)
CheckSetup()
ParseArgs(argv, CustomPatterns + GCCPatterns)
# "configure", especially when run as part of a toolchain bootstrap
# process, will invoke gcc with various diagnostic options and
# parse the output. In these cases we do not alter the incoming
# commandline. It is also important to not emit spurious messages.
if env.getbool('DIAGNOSTIC'):
if env.getbool('SHOW_VERSION'):
code, stdout, stderr = Run(env.get('CC') + env.get('CC_FLAGS'),
redirect_stdout=subprocess.PIPE)
out = stdout.split('\n')
nacl_version = ReadDriverRevision()
out[0] += ' nacl-version=%s' % nacl_version
stdout = '\n'.join(out)
print stdout,
else:
Run(env.get('CC') + env.get('CC_FLAGS'))
return 0
unmatched = env.get('UNMATCHED')
if len(unmatched) > 0:
UnrecognizedOption(*unmatched)
# If -arch was given, we are compiling directly to native code
compiling_to_native = GetArch() is not None
if env.getbool('ALLOW_NATIVE') and not compiling_to_native:
Log.Fatal("--pnacl-allow-native without -arch is not meaningful.")
if not env.get('STDLIB'):
# Default C++ Standard Library.
SetStdLib('libc++')
inputs = env.get('INPUTS')
output = env.getone('OUTPUT')
if len(inputs) == 0:
if env.getbool('VERBOSE'):
# -v can be invoked without any inputs. Runs the original
# command without modifying the commandline for this case.
Run(env.get('CC') + env.get('CC_FLAGS'))
return 0
else:
Log.Fatal('No input files')
gcc_mode = env.getone('GCC_MODE')
output_type = DriverOutputTypes(gcc_mode, compiling_to_native)
needs_linking = (gcc_mode == '')
if env.getbool('NEED_DASH_E') and gcc_mode != '-E':
Log.Fatal("-E or -x required when input is from stdin")
# There are multiple input files and no linking is being done.
# There will be multiple outputs. Handle this case separately.
if not needs_linking:
# Filter out flags
inputs = [f for f in inputs if not IsFlag(f)]
if output != '' and len(inputs) > 1:
Log.Fatal('Cannot have -o with -c, -S, or -E and multiple inputs: %s',
repr(inputs))
for f in inputs:
if IsFlag(f):
continue
intype = filetype.FileType(f)
if not filetype.IsSourceType(intype):
if ((output_type == 'pp' and intype != 'S') or
(output_type == 'll') or
(output_type == 'po' and intype != 'll') or
(output_type == 's' and intype not in ('ll','po','S')) or
(output_type == 'o' and intype not in ('ll','po','S','s'))):
Log.Fatal("%s: Unexpected type of file for '%s'",
pathtools.touser(f), gcc_mode)
if output == '':
f_output = DefaultOutputName(f, output_type)
else:
f_output = output
namegen = TempNameGen([f], f_output)
CompileOne(f, output_type, namegen, f_output)
return 0
# Linking case
assert(needs_linking)
assert(output_type in ('pso','so','pexe','nexe'))
if output == '':
output = pathtools.normalize('a.out')
namegen = TempNameGen(inputs, output)
# Compile all source files (c/c++/ll) to .po
for i in xrange(0, len(inputs)):
if IsFlag(inputs[i]):
continue
intype = filetype.FileType(inputs[i])
if filetype.IsSourceType(intype) or intype == 'll':
inputs[i] = CompileOne(inputs[i], 'po', namegen)
# Compile all .s/.S to .o
if env.getbool('ALLOW_NATIVE'):
for i in xrange(0, len(inputs)):
if IsFlag(inputs[i]):
continue
intype = filetype.FileType(inputs[i])
if intype in ('s','S'):
inputs[i] = CompileOne(inputs[i], 'o', namegen)
# We should only be left with .po and .o and libraries
for f in inputs:
if IsFlag(f):
continue
intype = filetype.FileType(f)
if intype in ('o','s','S') or filetype.IsNativeArchive(f):
if not env.getbool('ALLOW_NATIVE'):
Log.Fatal('%s: Native object files not allowed in link. '
'Use --pnacl-allow-native to override.', pathtools.touser(f))
assert(intype in ('po','o','so','ldscript') or filetype.IsArchive(f))
# Fix the user-specified linker arguments
ld_inputs = []
for f in inputs:
if f.startswith('-Xlinker='):
ld_inputs.append(f[len('-Xlinker='):])
elif f.startswith('-Wl,'):
ld_inputs += f[len('-Wl,'):].split(',')
else:
ld_inputs.append(f)
if env.getbool('ALLOW_NATIVE'):
ld_inputs.append('--pnacl-allow-native')
# Invoke the linker
env.set('ld_inputs', *ld_inputs)
ld_args = env.get('LD_ARGS')
ld_flags = env.get('LD_FLAGS')
RunDriver('ld', ld_flags + ld_args + ['-o', output])
return 0
def main(argv):
env.update(EXTRA_ENV)
CheckSetup()
ParseArgs(argv, CustomPatterns + GCCPatterns)
# "configure", especially when run as part of a toolchain bootstrap
# process, will invoke gcc with various diagnostic options and
# parse the output. In these cases we do not alter the incoming
# commandline. It is also important to not emit spurious messages.
if env.getbool('DIAGNOSTIC'):
if env.getbool('SHOW_VERSION'):
code, stdout, stderr = Run(env.get('CC') + env.get('CC_FLAGS'),
redirect_stdout=subprocess.PIPE)
out = stdout.split('\n')
nacl_version = ReadDriverRevision()
out[0] += ' nacl-version=%s' % nacl_version
stdout = '\n'.join(out)
print stdout,
else:
Run(env.get('CC') + env.get('CC_FLAGS'))
return 0
unmatched = env.get('UNMATCHED')
if len(unmatched) > 0:
UnrecognizedOption(*unmatched)
# If -arch was given, we are compiling directly to native code
compiling_to_native = GetArch() is not None
if env.getbool('ALLOW_NATIVE'):
if not compiling_to_native:
Log.Fatal("--pnacl-allow-native without -arch is not meaningful.")
# For native/mixed links, also bring in the native libgcc and
# libcrt_platform to avoid link failure if pre-translated native
# code needs functions from it.
env.append('LD_FLAGS', env.eval('-L${LIBS_NATIVE_ARCH}'))
env.append('STDLIBS', '-lgcc')
env.append('STDLIBS', '-lcrt_platform')
flags_and_inputs = env.get('INPUTS')
output = env.getone('OUTPUT')
if len(flags_and_inputs) == 0:
if env.getbool('VERBOSE'):
# -v can be invoked without any inputs. Runs the original
# command without modifying the commandline for this case.
Run(env.get('CC') + env.get('CC_FLAGS'))
return 0
else:
Log.Fatal('No input files')
gcc_mode = env.getone('GCC_MODE')
output_type = DriverOutputTypes(gcc_mode, compiling_to_native)
# '-shared' modifies the output from the linker and should be considered when
# determining the final output type.
if env.getbool('SHARED'):
if compiling_to_native:
Log.Fatal('Building native shared libraries not supported')
if gcc_mode != '':
Log.Fatal('-c, -S, and -E are disallowed with -shared')
output_type = 'pll'
# INPUTS consists of actual input files and a subset of flags like -Wl,<foo>.
# Create a version with just the files.
inputs = [f for f in flags_and_inputs if not IsFlag(f)]
header_inputs = [
f for f in inputs if filetype.IsHeaderType(filetype.FileType(f))
]
# Handle PCH case specially (but only for a limited sense...)
if header_inputs and gcc_mode != '-E':
# We only handle doing pre-compiled headers for all inputs or not at
# all at the moment. This is because DriverOutputTypes only assumes
# one type of output, depending on the "gcc_mode" flag. When mixing
# header inputs w/ non-header inputs, some of the outputs will be
# pch while others will be output_type. We would also need to modify
# the input->output chaining for the needs_linking case.
if len(header_inputs) != len(inputs):
Log.Fatal('mixed compiling of headers and source not supported')
CompileHeaders(header_inputs, output)
return 0
needs_linking = (gcc_mode == '')
if env.getbool('NEED_DASH_E') and gcc_mode != '-E':
Log.Fatal("-E or -x required when input is from stdin")
# There are multiple input files and no linking is being done.
# There will be multiple outputs. Handle this case separately.
if not needs_linking:
if output != '' and len(inputs) > 1:
Log.Fatal(
'Cannot have -o with -c, -S, or -E and multiple inputs: %s',
repr(inputs))
for f in inputs:
intype = filetype.FileType(f)
if not (filetype.IsSourceType(intype)
or filetype.IsHeaderType(intype)):
if ((output_type == 'pp' and intype != 'S')
or (output_type == 'll')
or (output_type == 'po' and intype != 'll') or
(output_type == 's' and intype not in ('ll', 'po', 'S'))
or (output_type == 'o'
and intype not in ('ll', 'po', 'S', 's'))):
Log.Fatal("%s: Unexpected type of file for '%s'",
pathtools.touser(f), gcc_mode)
if output == '':
f_output = DefaultOutputName(f, output_type)
else:
f_output = output
namegen = TempNameGen([f], f_output)
CompileOne(f, output_type, namegen, f_output)
return 0
# Linking case
assert (needs_linking)
assert (output_type in ('pll', 'pexe', 'nexe'))
if output == '':
output = pathtools.normalize('a.out')
namegen = TempNameGen(flags_and_inputs, output)
# Compile all source files (c/c++/ll) to .po
for i in xrange(0, len(flags_and_inputs)):
if IsFlag(flags_and_inputs[i]):
continue
intype = filetype.FileType(flags_and_inputs[i])
if filetype.IsSourceType(intype) or intype == 'll':
flags_and_inputs[i] = CompileOne(flags_and_inputs[i], 'po',
namegen)
# Compile all .s/.S to .o
if env.getbool('ALLOW_NATIVE'):
for i in xrange(0, len(flags_and_inputs)):
if IsFlag(flags_and_inputs[i]):
continue
intype = filetype.FileType(flags_and_inputs[i])
if intype in ('s', 'S'):
flags_and_inputs[i] = CompileOne(flags_and_inputs[i], 'o',
namegen)
# We should only be left with .po and .o and libraries
for f in flags_and_inputs:
if IsFlag(f):
continue
intype = filetype.FileType(f)
if intype in ('o', 's', 'S') or filetype.IsNativeArchive(f):
if not env.getbool('ALLOW_NATIVE'):
Log.Fatal(
'%s: Native object files not allowed in link. '
'Use --pnacl-allow-native to override.',
pathtools.touser(f))
assert (intype in ('po', 'o', 'so', 'ldscript')
or filetype.IsArchive(f))
# Fix the user-specified linker arguments
ld_inputs = []
for f in flags_and_inputs:
if f.startswith('-Xlinker='):
ld_inputs.append(f[len('-Xlinker='):])
elif f.startswith('-Wl,'):
ld_inputs += f[len('-Wl,'):].split(',')
else:
ld_inputs.append(f)
if env.getbool('ALLOW_NATIVE'):
ld_inputs.append('--pnacl-allow-native')
# Invoke the linker
env.set('ld_inputs', *ld_inputs)
ld_args = env.get('LD_ARGS')
ld_flags = env.get('LD_FLAGS')
RunDriver('pnacl-ld', ld_flags + ld_args + ['-o', output])
return 0
def main(argv):
env.update(EXTRA_ENV)
ParseArgs(argv, PATTERNS)
Run('"${NM}" --plugin=${GOLD_PLUGIN_SO} ${ARGS}')
# only reached in case of no errors
return 0
def main(argv):
env.update(EXTRA_ENV)
ParseArgs(argv, LDPatterns)
# If the user passed -arch, then they want native output.
arch_flag_given = GetArch() is not None
# Both LD_FLAGS_NATIVE and TRANSLATE_FLAGS_USER affect
# the translation process. If they are non-empty,
# then --pnacl-allow-native must be given.
allow_native = env.getbool('ALLOW_NATIVE')
native_flags = env.get('LD_FLAGS_NATIVE') + env.get('TRANSLATE_FLAGS_USER')
if len(native_flags) > 0:
if not allow_native:
flagstr = ' '.join(native_flags)
Log.Fatal('"%s" affects translation. '
'To allow, specify --pnacl-allow-native' % flagstr)
if env.getbool('ALLOW_NATIVE') and not arch_flag_given:
Log.Fatal("--pnacl-allow-native given, but translation "
"is not happening (missing -arch?)")
# Overriding the lib target uses native-flavored bitcode libs rather than the
# portable bitcode libs. It is currently only tested/supported for
# building the IRT.
if not IsPortable():
env.set('BASE_USR', "${BASE_USR_ARCH}")
env.set('BASE_LIB', "${BASE_LIB_ARCH}")
if env.getbool('RELOCATABLE'):
env.set('STATIC', '0')
inputs = env.get('INPUTS')
output = env.getone('OUTPUT')
if output == '':
output = pathtools.normalize('a.out')
if not arch_flag_given:
# If -arch is not given, assume X86-32.
# This is because gold requires an arch (even for bitcode linking).
SetArch('X8632')
assert(GetArch() is not None)
inputs = FixPrivateLibs(inputs)
# Expand all parameters
# This resolves -lfoo into actual filenames,
# and expands linker scripts into command-line arguments.
inputs = ldtools.ExpandInputs(inputs,
env.get('SEARCH_DIRS'),
env.getbool('STATIC'),
# Once all glibc bitcode link is purely
# bitcode (e.g., even libc_nonshared.a)
# we may be able to restrict this more.
# This is also currently used by
# pnacl_generate_pexe=0 with glibc,
# for user libraries.
ldtools.LibraryTypes.ANY)
# Make sure the inputs have matching arch.
CheckInputsArch(inputs)
regular_inputs, native_objects = SplitLinkLine(inputs)
if env.getbool('RELOCATABLE'):
bitcode_type = 'po'
native_type = 'o'
else:
bitcode_type = 'pexe'
native_type = 'nexe'
if native_objects and not allow_native:
argstr = ' '.join(native_objects)
Log.Fatal("Native objects '%s' detected in the link. "
"To allow, specify --pnacl-allow-native" % argstr)
tng = TempNameGen([], output)
# Do the bitcode link.
if HasBitcodeInputs(inputs):
chain = DriverChain(inputs, output, tng)
chain.add(LinkBC, 'pre_opt.' + bitcode_type)
# Some ABI simplification passes assume the whole program is
# available (e.g. -expand-varargs, -nacl-expand-ctors and
# -nacl-expand-tls). While we could try running a subset of
# simplification passes when linking native objects, we don't
# do this because it complicates testing. For example,
# it requires '-expand-constant-expr' to be able to handle
# 'landingpad' instructions.
# However, if we aren't using biased bitcode, then at least -expand-byval
# must be run to work with the PPAPI shim calling convention.
# This assumes that PPAPI does not use var-args, so passes like
# -expand-varargs and other calling-convention-changing passes are
# not needed.
abi_simplify = (env.getbool('STATIC') and
len(native_objects) == 0 and
env.getone('CXX_EH_MODE') != 'zerocost' and
not env.getbool('ALLOW_NEXE_BUILD_ID') and
IsPortable())
still_need_expand_byval = IsPortable()
abi_simplify_opts = []
if env.getone('CXX_EH_MODE') == 'sjlj':
abi_simplify_opts += ['-enable-pnacl-sjlj-eh']
preopt_passes = []
if abi_simplify:
preopt_passes += ['-pnacl-abi-simplify-preopt'] + abi_simplify_opts
elif env.getone('CXX_EH_MODE') != 'zerocost':
# '-lowerinvoke' prevents use of C++ exception handling, which
# is not yet supported in the PNaCl ABI. '-simplifycfg' removes
# landingpad blocks made unreachable by '-lowerinvoke'.
#
# We run this in order to remove 'resume' instructions,
# otherwise these are translated to calls to _Unwind_Resume(),
# which will not be available at native link time.
preopt_passes += ['-lowerinvoke', '-simplifycfg']
if len(preopt_passes) != 0:
chain.add(DoLLVMPasses(preopt_passes), 'simplify_preopt.' + bitcode_type)
if env.getone('OPT_LEVEL') != '' and env.getone('OPT_LEVEL') != '0':
chain.add(DoLTO, 'opt.' + bitcode_type)
elif env.getone('STRIP_MODE') != 'none':
chain.add(DoStrip, 'stripped.' + bitcode_type)
postopt_passes = []
if abi_simplify:
postopt_passes = ['-pnacl-abi-simplify-postopt'] + abi_simplify_opts
if not env.getbool('DISABLE_ABI_CHECK'):
postopt_passes += [
'-verify-pnaclabi-module',
'-verify-pnaclabi-functions',
# A flag for the above -verify-pnaclabi-* passes.
'-pnaclabi-allow-debug-metadata']
if env.getbool('ALLOW_DEV_INTRINSICS'):
# A flag for the above -verify-pnaclabi-* passes.
postopt_passes += ['-pnaclabi-allow-dev-intrinsics']
elif still_need_expand_byval:
# We may still need -expand-byval to match the PPAPI shim
# calling convention.
postopt_passes = ['-expand-byval']
if len(postopt_passes) != 0:
chain.add(DoLLVMPasses(postopt_passes),
'simplify_postopt.' + bitcode_type)
else:
chain = DriverChain('', output, tng)
# If -arch is also specified, invoke pnacl-translate afterwards.
if arch_flag_given:
env.set('NATIVE_OBJECTS', *native_objects)
chain.add(DoTranslate, native_type)
chain.run()
if bitcode_type == 'pexe' and not arch_flag_given:
# Mark .pexe files as executable.
# Some versions of 'configure' expect this.
SetExecutableMode(output)
return 0