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)
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, 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 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)
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