diff options
Diffstat (limited to 'SConstruct')
| -rwxr-xr-x | SConstruct | 54 |
1 files changed, 24 insertions, 30 deletions
diff --git a/SConstruct b/SConstruct index f20492a0b..6a44f3a94 100755 --- a/SConstruct +++ b/SConstruct @@ -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']) - - # 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'] + # 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'] 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: |