Dir('src/python').srcnode().abspath, # gem5 includes
Dir('ext/ply').srcnode().abspath, # ply is used by several files
]
-
+
sys.path[1:1] = extra_python_paths
from m5.util import compareVersions, readCommand
help='Override which build_opts file to use for defaults')
AddLocalOption('--ignore-style', dest='ignore_style', action='store_true',
help='Disable style checking hooks')
+AddLocalOption('--no-lto', dest='no_lto', action='store_true',
+ help='Disable Link-Time Optimization for fast')
AddLocalOption('--update-ref', dest='update_ref', action='store_true',
help='Update test reference outputs')
AddLocalOption('--verbose', dest='verbose', action='store_true',
# Set up the main build environment.
#
########################################################################
-use_vars = set([ 'AS', 'AR', 'CC', 'CXX', 'HOME', 'LD_LIBRARY_PATH', 'PATH',
- 'PYTHONPATH', 'RANLIB', 'SWIG' ])
+use_vars = set([ 'AS', 'AR', 'CC', 'CXX', 'HOME', 'LD_LIBRARY_PATH',
+ 'LIBRARY_PATH', 'PATH', 'PYTHONPATH', 'RANLIB', 'SWIG' ])
use_env = {}
for key,val in os.environ.iteritems():
main.root = Dir(".") # The current directory (where this file lives).
main.srcdir = Dir("src") # The source directory
+main_dict_keys = main.Dictionary().keys()
+
+# Check that we have a C/C++ compiler
+if not ('CC' in main_dict_keys and 'CXX' in main_dict_keys):
+ print "No C++ compiler installed (package g++ on Ubuntu and RedHat)"
+ Exit(1)
+
+# Check that swig is present
+if not 'SWIG' in main_dict_keys:
+ print "swig is not installed (package swig on Ubuntu and RedHat)"
+ Exit(1)
+
# add useful python code PYTHONPATH so it can be used by subprocesses
# as well
main.AppendENVPath('PYTHONPATH', extra_python_paths)
main['SHCXXCOMSTR'] = Transform("SHCXX")
Export('MakeAction')
+# Initialize the Link-Time Optimization (LTO) flags
+main['LTO_CCFLAGS'] = []
+main['LTO_LDFLAGS'] = []
+
CXX_version = readCommand([main['CXX'],'--version'], exception=False)
CXX_V = readCommand([main['CXX'],'-V'], exception=False)
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'])
- if compareVersions(gcc_version, '4.6') >= 0:
+ # c++0x support in gcc is useful already from 4.4, see
+ # http://gcc.gnu.org/projects/cxx0x.html for details
+ if compareVersions(gcc_version, '4.4') >= 0:
main.Append(CXXFLAGS=['-std=c++0x'])
+
+ # 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']
+
elif main['ICC']:
pass #Fix me... add warning flags once we clean up icc warnings
elif main['SUNCC']:
# of if-statements
main.Append(CCFLAGS=['-Wno-parentheses'])
+ # clang 2.9 does not play well with c++0x as it ships with C++
+ # headers that produce errors, this was fixed in 3.0
if compareVersions(clang_version, "3") >= 0:
main.Append(CXXFLAGS=['-std=c++0x'])
else:
- print 'Error: Don\'t know what compiler options to use for your compiler.'
- print ' Please fix SConstruct and src/SConscript and try again.'
+ print termcap.Yellow + termcap.Bold + 'Error' + termcap.Normal,
+ print "Don't know what compiler options to use for your compiler."
+ print termcap.Yellow + ' compiler:' + termcap.Normal, main['CXX']
+ print termcap.Yellow + ' version:' + termcap.Normal,
+ if not CXX_version:
+ print termcap.Yellow + termcap.Bold + "COMMAND NOT FOUND!" +\
+ termcap.Normal
+ else:
+ print CXX_version.replace('\n', '<nl>')
+ print " If you're trying to use a compiler other than GCC, ICC, SunCC,"
+ print " or clang, there appears to be something wrong with your"
+ print " environment."
+ print " "
+ print " If you are trying to use a compiler other than those listed"
+ print " above you will need to ease fix SConstruct and "
+ print " src/SConscript to support that compiler."
Exit(1)
# Set up common yacc/bison flags (needed for Ruby)
Exit(1)
# Check for appropriate SWIG version
-swig_version = readCommand(('swig', '-version'), exception='').split()
+swig_version = readCommand([main['SWIG'], '-version'], exception='').split()
# First 3 words should be "SWIG Version x.y.z"
if len(swig_version) < 3 or \
swig_version[0] != 'SWIG' or swig_version[1] != 'Version':
context.Result(ret)
return ret
+# Test for the presence of C++11 static asserts. If the compiler lacks
+# support for static asserts, base/compiler.hh enables a macro that
+# removes any static asserts in the code.
+def CheckStaticAssert(context):
+ context.Message("Checking for C++11 static_assert support...")
+ ret = context.TryCompile('''
+ static_assert(1, "This assert is always true");
+ ''', extension=".cc")
+ context.env.Append(HAVE_STATIC_ASSERT=ret)
+ context.Result(ret)
+ return ret
+
# Platform-specific configuration. Note again that we assume that all
# builds under a given build root run on the same host platform.
conf = Configure(main,
conf_dir = joinpath(build_root, '.scons_config'),
log_file = joinpath(build_root, 'scons_config.log'),
- custom_tests = { 'CheckLeading' : CheckLeading })
+ custom_tests = { 'CheckLeading' : CheckLeading,
+ 'CheckStaticAssert' : CheckStaticAssert,
+ })
# Check for leading underscores. Don't really need to worry either
# way so don't need to check the return code.
conf.CheckLeading()
+# Check for C++11 features we want to use if they exist
+conf.CheckStaticAssert()
+
# Check if we should compile a 64 bit binary on Mac OS X/Darwin
try:
import platform
# verify that this stuff works
if not conf.CheckHeader('Python.h', '<>'):
print "Error: can't find Python.h header in", py_includes
+ print "Install Python headers (package python-dev on Ubuntu and RedHat)"
Exit(1)
for lib in py_libs:
have_tcmalloc = False
print termcap.Yellow + termcap.Bold + \
"You can get a 12% performance improvement by installing tcmalloc "\
- "(google-perftools package on Ubuntu or RedHat)." + termcap.Normal
+ "(libgoogle-perftools-dev package on Ubuntu or RedHat)." + \
+ termcap.Normal
if not have_posix_clock:
print "Can't find library for POSIX clocks."
export_vars = []
Export('export_vars')
+# For Ruby
+all_protocols = []
+Export('all_protocols')
+protocol_dirs = []
+Export('protocol_dirs')
+slicc_includes = []
+Export('slicc_includes')
+
# Walk the tree and execute all SConsopts scripts that wil add to the
# above variables
if not GetOption('verbose'):
BoolVariable('USE_POSIX_CLOCK', 'Use POSIX Clocks', have_posix_clock),
BoolVariable('USE_FENV', 'Use <fenv.h> IEEE mode control', have_fenv),
BoolVariable('CP_ANNOTATE', 'Enable critical path annotation capability', False),
+ EnumVariable('PROTOCOL', 'Coherence protocol for Ruby', 'None',
+ all_protocols),
)
# These variables get exported to #defines in config/*.hh (see src/SConscript).
export_vars += ['USE_FENV', 'SS_COMPATIBLE_FP',
- 'TARGET_ISA', 'CP_ANNOTATE', 'USE_POSIX_CLOCK' ]
+ 'TARGET_ISA', 'CP_ANNOTATE', 'USE_POSIX_CLOCK', 'PROTOCOL',
+ 'HAVE_STATIC_ASSERT']
###################################################
#
projects / gem5.git / blobdiff