1# -*- mode:python -*-
2
3# Copyright (c) 2013 ARM Limited
4# All rights reserved.
5#
6# The license below extends only to copyright in the software and shall
7# not be construed as granting a license to any other intellectual
8# property including but not limited to intellectual property relating

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563 print " environment."
564 print " "
565 print " If you are trying to use a compiler other than those listed"
566 print " above you will need to ease fix SConstruct and "
567 print " src/SConscript to support that compiler."
568 Exit(1)
569
570if main['GCC']:
571 # Check for a supported version of gcc. >= 4.6 is chosen for its
572 # level of c++11 support. See
573 # http://gcc.gnu.org/projects/cxx0x.html for details. 4.6 is also
574 # the first version with proper LTO support.
575 gcc_version = readCommand([main['CXX'], '-dumpversion'], exception=False)
576 if compareVersions(gcc_version, "4.6") < 0:
577 print 'Error: gcc version 4.6 or newer required.'
578 print ' Installed version:', gcc_version
579 Exit(1)
580
581 main['GCC_VERSION'] = gcc_version
582
583 # Add the appropriate Link-Time Optimization (LTO) flags
584 # unless LTO is explicitly turned off. Note that these flags
585 # are only used by the fast target.
586 if not GetOption('no_lto'):
587 # Pass the LTO flag when compiling to produce GIMPLE
588 # output, we merely create the flags here and only append
589 # them later/
590 main['LTO_CCFLAGS'] = ['-flto=%d' % GetOption('num_jobs')]
591
592 # Use the same amount of jobs for LTO as we are running
593 # scons with, we hardcode the use of the linker plugin
594 # which requires either gold or GNU ld >= 2.21
595 main['LTO_LDFLAGS'] = ['-flto=%d' % GetOption('num_jobs'),
596 '-fuse-linker-plugin']
597
598 main.Append(TCMALLOC_CCFLAGS=['-fno-builtin-malloc', '-fno-builtin-calloc',
599 '-fno-builtin-realloc', '-fno-builtin-free'])
600
601elif main['CLANG']:
602 # Check for a supported version of clang, >= 3.0 is needed to
603 # support similar features as gcc 4.6. See
604 # http://clang.llvm.org/cxx_status.html for details
605 clang_version_re = re.compile(".* version (\d+\.\d+)")
606 clang_version_match = clang_version_re.search(CXX_version)
607 if (clang_version_match):
608 clang_version = clang_version_match.groups()[0]
609 if compareVersions(clang_version, "3.0") < 0:
610 print 'Error: clang version 3.0 or newer required.'
611 print ' Installed version:', clang_version
612 Exit(1)
613 else:
614 print 'Error: Unable to determine clang version.'
615 Exit(1)
616
617 # clang has a few additional warnings that we disable,
618 # tautological comparisons are allowed due to unsigned integers

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