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scons: Bump the compiler version to gcc 4.6 and clang 3.0

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This patch bumps the supported version of gcc from 4.4 to 4.6, and
clang from 2.9 to 3.0. This enables, amongst other things, range-based
for loops, lambda expressions, etc. The STL implementation shipping
with 4.6 also has a full functional implementation of unique_ptr and
shared_ptr.
This commit is contained in:
Andreas Hansson 2014-06-10 17:44:39 -04:00
parent 4a98b0cd59
commit fdb965f5c1
2 changed files with 25 additions and 33 deletions
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52
SConstruct
View file

@ -568,52 +568,46 @@ else:
Exit(1)
if main['GCC']:
# Check for a supported version of gcc, >= 4.4 is needed for c++0x
# support. See http://gcc.gnu.org/projects/cxx0x.html for details
# Check for a supported version of gcc. >= 4.6 is chosen for its
# level of c++11 support. See
# http://gcc.gnu.org/projects/cxx0x.html for details. 4.6 is also
# the first version with proper LTO support.
gcc_version = readCommand([main['CXX'], '-dumpversion'], exception=False)
if compareVersions(gcc_version, "4.4") < 0:
print 'Error: gcc version 4.4 or newer required.'
if compareVersions(gcc_version, "4.6") < 0:
print 'Error: gcc version 4.6 or newer required.'
print ' Installed version:', gcc_version
Exit(1)
main['GCC_VERSION'] = gcc_version
# Check for versions with bugs
if not compareVersions(gcc_version, '4.4.1') or \
not compareVersions(gcc_version, '4.4.2'):
print 'Info: Tree vectorizer in GCC 4.4.1 & 4.4.2 is buggy, disabling.'
main.Append(CCFLAGS=['-fno-tree-vectorize'])
# Add the appropriate Link-Time Optimization (LTO) flags
# unless LTO is explicitly turned off. Note that these flags
# are only used by the fast target.
if not GetOption('no_lto'):
# Pass the LTO flag when compiling to produce GIMPLE
# output, we merely create the flags here and only append
# them later/
main['LTO_CCFLAGS'] = ['-flto=%d' % GetOption('num_jobs')]
# LTO support is only really working properly from 4.6 and beyond
if compareVersions(gcc_version, '4.6') >= 0:
# Add the appropriate Link-Time Optimization (LTO) flags
# unless LTO is explicitly turned off. Note that these flags
# are only used by the fast target.
if not GetOption('no_lto'):
# Pass the LTO flag when compiling to produce GIMPLE
# output, we merely create the flags here and only append
# them later/
main['LTO_CCFLAGS'] = ['-flto=%d' % GetOption('num_jobs')]
# Use the same amount of jobs for LTO as we are running
# scons with, we hardcode the use of the linker plugin
# which requires either gold or GNU ld >= 2.21
main['LTO_LDFLAGS'] = ['-flto=%d' % GetOption('num_jobs'),
'-fuse-linker-plugin']
# Use the same amount of jobs for LTO as we are running
# scons with, we hardcode the use of the linker plugin
# which requires either gold or GNU ld >= 2.21
main['LTO_LDFLAGS'] = ['-flto=%d' % GetOption('num_jobs'),
'-fuse-linker-plugin']
main.Append(TCMALLOC_CCFLAGS=['-fno-builtin-malloc', '-fno-builtin-calloc',
'-fno-builtin-realloc', '-fno-builtin-free'])
elif main['CLANG']:
# Check for a supported version of clang, >= 2.9 is needed to
# support similar features as gcc 4.4. See
# Check for a supported version of clang, >= 3.0 is needed to
# support similar features as gcc 4.6. See
# http://clang.llvm.org/cxx_status.html for details
clang_version_re = re.compile(".* version (\d+\.\d+)")
clang_version_match = clang_version_re.search(CXX_version)
if (clang_version_match):
clang_version = clang_version_match.groups()[0]
if compareVersions(clang_version, "2.9") < 0:
print 'Error: clang version 2.9 or newer required.'
if compareVersions(clang_version, "3.0") < 0:
print 'Error: clang version 3.0 or newer required.'
print ' Installed version:', clang_version
Exit(1)
else:

6
src/SConscript
View file

@ -925,10 +925,8 @@ def makeEnv(env, label, objsfx, strip = False, **kwargs):
# warnings about uninitialized variables and missing field
# initializers.
swig_env.Append(CCFLAGS=['-Wno-uninitialized',
'-Wno-missing-field-initializers'])
if compareVersions(env['GCC_VERSION'], '4.6') >= 0:
swig_env.Append(CCFLAGS='-Wno-unused-but-set-variable')
'-Wno-missing-field-initializers',
'-Wno-unused-but-set-variable'])
# If gcc supports it, also warn for deletion of derived
# classes with non-virtual desctructors. For gcc >= 4.7 we