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Add markup for libc++ dylib availability

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Libc++ is used as a system library on macOS and iOS (amongst others). In order
for users to be able to compile a binary that is intended to be deployed to an
older version of the platform, clang provides the
availability attribute <https://clang.llvm.org/docs/AttributeReference.html#availability>_
that can be placed on declarations to describe the lifecycle of a symbol in the
library.

See docs/DesignDocs/AvailabilityMarkup.rst for more information.

Differential Revision: https://reviews.llvm.org/D31739

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@302172 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Mehdi Amini
2017-05-04 17:08:54 +00:00
parent 3320e88ab4
commit 907c1196a7
174 changed files with 1060 additions and 126 deletions
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50
utils/libcxx/test/config.py
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@@ -123,6 +123,7 @@ class Configuration(object):
self.configure_cxx()
self.configure_triple()
self.configure_deployment()
self.configure_availability()
self.configure_src_root()
self.configure_obj_root()
self.configure_cxx_stdlib_under_test()
@@ -285,6 +286,12 @@ class Configuration(object):
self.lit_config.note(
"inferred use_system_cxx_lib as: %r" % self.use_system_cxx_lib)
def configure_availability(self):
# See http://llvm.org/docs/AvailabilityMarkup.html
self.with_availability = self.get_lit_bool('with_availability', False)
self.lit_config.note(
"inferred with_availability as: %r" % self.with_availability)
def configure_cxx_stdlib_under_test(self):
self.cxx_stdlib_under_test = self.get_lit_conf(
'cxx_stdlib_under_test', 'libc++')
@@ -306,6 +313,9 @@ class Configuration(object):
def configure_use_clang_verify(self):
'''If set, run clang with -verify on failing tests.'''
if self.with_availability:
self.use_clang_verify = False
return
self.use_clang_verify = self.get_lit_bool('use_clang_verify')
if self.use_clang_verify is None:
# NOTE: We do not test for the -verify flag directly because
@@ -346,6 +356,12 @@ class Configuration(object):
self.cxx.use_ccache = True
self.lit_config.note('enabling ccache')
def add_deployment_feature(self, feature):
(arch, name, version) = self.config.deployment
self.config.available_features.add('%s=%s-%s' % (feature, arch, name))
self.config.available_features.add('%s=%s' % (feature, name))
self.config.available_features.add('%s=%s%s' % (feature, name, version))
def configure_features(self):
additional_features = self.get_lit_conf('additional_features')
if additional_features:
@@ -364,16 +380,32 @@ class Configuration(object):
self.config.available_features.add(
'with_system_cxx_lib=%s' % self.config.target_triple)
# Add subcomponents individually.
target_components = self.config.target_triple.split('-')
for component in target_components:
self.config.available_features.add(
'with_system_cxx_lib=%s' % component)
# Add available features for more generic versions of the target
# triple attached to with_system_cxx_lib.
if self.use_deployment:
self.add_deployment_feature('with_system_cxx_lib')
# Configure the availability markup checks features.
if self.with_availability:
self.config.available_features.add('availability_markup')
self.add_deployment_feature('availability_markup')
if self.use_system_cxx_lib or self.with_availability:
self.config.available_features.add('availability')
self.add_deployment_feature('availability')
if platform.system() == 'Darwin':
self.config.available_features.add('apple-darwin')
# Insert the platform name into the available features as a lower case.
self.config.available_features.add(target_platform)
# If we're using deployment, add sub-components of the triple using
# "darwin" instead of the platform name.
if self.use_deployment:
arch, _, _ = self.config.deployment
self.config.available_features.add('apple-darwin')
self.config.available_features.add(arch + '-apple-darwin')
# Simulator testing can take a really long time for some of these tests
# so add a feature check so we can REQUIRES: long_tests in them
self.long_tests = self.get_lit_bool('long_tests')
@@ -508,6 +540,10 @@ class Configuration(object):
self.cxx.flags += ['-arch', arch]
self.cxx.flags += ['-m' + name + '-version-min=' + version]
# Disable availability unless explicitely requested
if not self.with_availability:
self.cxx.flags += ['-D_LIBCPP_DISABLE_AVAILABILITY']
def configure_compile_flags_header_includes(self):
support_path = os.path.join(self.libcxx_src_root, 'test', 'support')
if self.cxx_stdlib_under_test != 'libstdc++' and \