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Help("""
=============================================
liblitmus --- The LITMUS^RT Userspace Library
There are a number of user-configurable build
variables. These can either be set on the
command line (e.g., scons ARCH=x86) or read
from a local configuration file (.config).
Run 'scons --dump-config' to see the final
build configuration.
""")
import os
(ostype, _, _, _, arch) = os.uname()
# sanity check
if ostype != 'Linux':
print 'Error: Building liblitmus is only supported on Linux.'
Exit(1)
# #####################################################################
# Internal configuration.
DEBUG_FLAGS = '-Wall -g -Wdeclaration-after-statement'
API_FLAGS = '-D_XOPEN_SOURCE=600 -D_GNU_SOURCE'
X86_32_FLAGS = '-m32'
X86_64_FLAGS = '-m64'
V9_FLAGS = '-mcpu=v9 -m64'
SUPPORTED_ARCHS = {
'sparc64' : V9_FLAGS,
'x86' : X86_32_FLAGS,
'x86_64' : X86_64_FLAGS,
}
ARCH_ALIAS = {
'i686' : 'x86'
}
# name of the directory that has the arch headers in the Linux source
INCLUDE_ARCH = {
'sparc64' : 'sparc',
'x86' : 'x86',
'x86_64' : 'x86',
}
INCLUDE_DIRS = [
# library headers
'include/',
# Linux kernel headers
'${LITMUS_KERNEL}/include/',
# Linux architecture-specific kernel headers
'$LITMUS_KERNEL/arch/${INCLUDE_ARCH}/include'
]
# #####################################################################
# User configuration.
vars = Variables('.config', ARGUMENTS)
vars.AddVariables(
PathVariable('LITMUS_KERNEL',
'Where to find the LITMUS^RT kernel.',
'../litmus2010'),
EnumVariable('ARCH',
'Target architecture.',
arch,
SUPPORTED_ARCHS.keys() + ARCH_ALIAS.keys()),
)
AddOption('--dump-config',
dest='dump',
action='store_true',
default=False,
help="dump the build configuration and exit")
# #####################################################################
# Build configuration.
env = Environment(variables = vars)
# Check what we are building for.
arch = env['ARCH']
# replace if the arch has an alternative name
if arch in ARCH_ALIAS:
arch = ARCH_ALIAS[arch]
env['ARCH'] = arch
# Get include directory for arch.
env['INCLUDE_ARCH'] = INCLUDE_ARCH[arch]
arch_flags = Split(SUPPORTED_ARCHS[arch])
dbg_flags = Split(DEBUG_FLAGS)
api_flags = Split(API_FLAGS)
# Set up environment
env.Replace(
CC = 'gcc',
CPPPATH = INCLUDE_DIRS,
CCFLAGS = dbg_flags + api_flags + arch_flags,
LINKFLAGS = arch_flags,
)
def dump_config(env):
def dump(key):
print "%15s = %s" % (key, env.subst("${%s}" % key))
dump('ARCH')
dump('LITMUS_KERNEL')
dump('CPPPATH')
dump('CCFLAGS')
dump('LINKFLAGS')
if GetOption('dump'):
print "\n"
print "Build Configuration:"
dump_config(env)
print "\n"
Exit(0)
# #####################################################################
# Build checks.
def CheckSyscallNr(context):
context.Message('Checking for LITMUS^RT syscall numbers... ')
nrSrc = """
#include <linux/unistd.h>
int main(int argc, char **argv)
{
return __NR_set_rt_task_param;
}
"""
result = context.TryLink(nrSrc, '.c')
context.Result(result)
return result
def abort(msg, help=None):
print "Error: %s" % env.subst(msg)
print "-" * 80
print "This is the build configuration in use:"
dump_config(env)
if help:
print "-" * 80
print env.subst(help)
print "\n"
Exit(1)
# Check compile environment
if not (env.GetOption('clean') or env.GetOption('help')):
print env.subst('Building ${ARCH} binaries.')
# Check for kernel headers.
conf = Configure(env, custom_tests = {'CheckSyscallNr' : CheckSyscallNr})
conf.CheckCHeader('linux/unistd.h') or \
abort("Cannot find kernel headers in '$LITMUS_KERNEL'",
"Please ensure that LITMUS_KERNEL in .config is set to a valid path.")
conf.CheckCHeader('litmus/rt_param.h') or \
abort("Cannot find LITMUS^RT headers in '$LITMUS_KERNEL'",
"Please ensure sure that the kernel in '$LITMUS_KERNEL'"
" is a LITMUS^RT kernel.")
conf.CheckSyscallNr() or \
abort("The LITMUS^RT syscall numbers are not available.",
"Please ensure sure that the kernel in '$LITMUS_KERNEL'"
" is a LITMUS^RT kernel.")
env = conf.Finish()
# #####################################################################
# Derived environments
# link with liblitmus
rt = env.Clone(
LIBS = Split('litmus rt'),
LIBPATH = '.'
)
rt.Append(LINKFLAGS = '-static')
# link with math lib
rtm = rt.Clone()
rtm.Append(LIBS = ['m'])
# multithreaded real-time tasks
mtrt = rt.Clone()
mtrt.Append(LINKFLAGS = '-pthread')
# #####################################################################
# Targets: liblitmus
# All the files in src/ are part of the library.
env.Library('litmus',
['src/kernel_iface.c', 'src/litmus.c',
'src/syscalls.c', 'src/task.c'])
# #####################################################################
# Targets: simple tools that do not depend on liblitmus
env.Program('cycles', 'bin/cycles.c')
# #####################################################################
# Targets: tools that depend on liblitmus
rt.Program('base_task', 'bin/base_task.c')
mtrt.Program('base_mt_task', 'bin/base_mt_task.c')
rt.Program('rt_launch', ['bin/rt_launch.c', 'bin/common.c'])
rt.Program('rtspin', ['bin/rtspin.c', 'bin/common.c'])
rt.Program('release_ts', 'bin/release_ts.c')
rtm.Program('measure_syscall', 'bin/null_call.c')
# #####################################################################
# Test suite.
mkc = Builder(action = 'tests/make_catalog.py $SOURCES > $TARGET')
test = mtrt.Clone()
test.Append(BUILDERS = {'TestCatalog' : mkc})
test.Append(CPPPATH = ['tests/'])
catalog = test.TestCatalog('tests/__test_catalog.inc', Glob('tests/*.c'))
test.Program('runtests', Glob('tests/*.c'))
# #####################################################################
# Additional Help
Help("Build Variables\n")
Help("---------------\n")
Help(vars.GenerateHelpText(env))
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