def load_compiler(conf, compiler, arch):
# Note clang goes first otherwise 'g++' will be in 'clang++'
# ¯¯¯ ¯¯¯
if 'clang' in compiler:
conf.mkspec_clang_configure(3, 6, minimum=True)
elif 'g++' in compiler:
conf.mkspec_gxx_configure(4, 9, minimum=True)
elif 'msvc' in compiler or 'CL.exe' in compiler or 'cl.exe' in compiler:
if arch == 'x86':
conf.env.MSVC_TARGETS = ['x86']
elif arch == 'x64':
conf.env.MSVC_TARGETS = ['x86_amd64']
conf.load('msvc')
# Note: the waf msvc tool also loads msvc as a C compiler
conf.mkspec_check_minimum_msvc_version(14.0)
conf.mkspec_set_msvc_flags()
else:
raise Errors.WafError('Unknown compiler: %s' % compiler)
if ('clang' in compiler or 'g++' in compiler) and arch:
if arch == 'x86':
conf.mkspec_add_common_flag('-m32')
elif arch == 'x64':
conf.mkspec_add_common_flag('-m64')
def load_compiler(conf, compiler, arch):
# Note clang goes first otherwise 'g++' will be in 'clang++'
# ¯¯¯ ¯¯¯
if 'clang' in compiler:
conf.mkspec_clang_configure(3, 6, minimum=True)
elif 'g++' in compiler:
conf.mkspec_gxx_configure(4, 9, minimum=True)
elif 'msvc' in compiler or 'CL.exe' in compiler or 'cl.exe' in compiler:
if arch == 'x86':
conf.env.MSVC_TARGETS = ['x86']
elif arch == 'x64':
conf.env.MSVC_TARGETS = ['x64', 'x86_amd64']
conf.load('msvc')
# Note: the waf msvc tool also loads msvc as a C compiler
conf.mkspec_check_minimum_msvc_version(14.0)
conf.mkspec_set_msvc_flags()
else:
raise Errors.WafError('Unknown compiler: %s' % compiler)
if ('clang' in compiler or 'g++' in compiler) and arch:
if arch == 'x86':
conf.mkspec_add_common_flag('-m32')
elif arch == 'x64':
conf.mkspec_add_common_flag('-m64')
def load_compiler(conf, compiler, arch):
# Note clang goes first otherwise 'g++' will be in 'clang++'
# ¯¯¯ ¯¯¯
if "clang" in compiler:
conf.mkspec_clang_configure(3, 6, minimum=True)
elif "g++" in compiler:
conf.mkspec_gxx_configure(4, 9, minimum=True)
elif "msvc" in compiler or "CL.exe" in compiler or "cl.exe" in compiler:
if arch == "x86":
conf.env.MSVC_TARGETS = ["x86"]
elif arch == "x64":
conf.env.MSVC_TARGETS = ["x64", "x86_amd64"]
conf.load("msvc")
# Note: the waf msvc tool also loads msvc as a C compiler
conf.mkspec_check_minimum_msvc_version(14.0)
conf.mkspec_set_msvc_flags()
else:
raise Errors.WafError("Unknown compiler: %s" % compiler)
if ("clang" in compiler or "g++" in compiler) and arch:
if arch == "x86":
conf.mkspec_add_common_flag("-m32")
elif arch == "x64":
conf.mkspec_add_common_flag("-m64")
def mkspec_setup_clang_thread_sanitizer(conf, major, minor, arch):
"""
http://clang.llvm.org/docs/ThreadSanitizer.html
"""
conf.mkspec_clang_configure(major, minor, force_debug=True)
conf.mkspec_add_common_flag(arch)
conf.mkspec_add_common_flag('-fsanitize=thread')
def cxx_crosslinux_gxx46_x86(conf):
"""
Detect and setup the g++ 4.6 cross-compiler for 32-bit Linux
"""
conf.mkspec_gxx_configure(4, 6, 'crosslinux-gxx46-x86')
conf.mkspec_add_common_flag('-m32')
# Note: libstdc++ might not be available on the target platform
# Statically link the GCC runtime and the C++ standard library
conf.env['LINKFLAGS'] += ['-static-libgcc', '-static-libstdc++']
def cxx_apple_llvm50_x86(conf):
"""
Detect and setup the 32-bit Apple llvm 5.0 compiler (clang 3.3)
"""
if conf.is_mkspec_platform('mac'):
conf.mkspec_clang_configure(5, 0)
conf.mkspec_add_common_flag('-m32')
else:
conf.fatal("This mkspec is not supported on {0}.".format(
conf.get_mkspec_platform()))
def cxx_apple_llvm130_x64(conf):
"""
Detect and setup the 64-bit Apple LLVM 13.0 compiler
"""
if conf.is_mkspec_platform("mac"):
conf.mkspec_clang_configure(13, 0)
conf.mkspec_add_common_flag("-m64")
else:
conf.fatal("This mkspec is not supported on {0}.".format(
conf.get_mkspec_platform()))
def cxx_apple_llvm42_x64(conf):
"""
Detect and setup the 64-bit Apple llvm 4.2 compiler (clang 3.2)
"""
if conf.is_mkspec_platform('mac'):
conf.mkspec_clang_configure(4, 2)
conf.mkspec_add_common_flag('-m64')
else:
conf.fatal("This mkspec is not supported on {0}.".format(
conf.get_mkspec_platform()))
def cxx_apple_llvm42_x64(conf):
"""
Detect and setup the 64-bit Apple llvm 4.2 compiler (clang 3.2)
"""
if conf.is_mkspec_platform('mac'):
conf.mkspec_clang_configure(4, 2)
conf.mkspec_add_common_flag('-m64')
else:
conf.fatal("This mkspec is not supported on {0}.".format(
conf.get_mkspec_platform()))
def cxx_apple_llvm50_x86(conf):
"""
Detect and setup the 32-bit Apple llvm 5.0 compiler (clang 3.3)
"""
if conf.is_mkspec_platform('mac'):
conf.mkspec_clang_configure(5, 0)
conf.mkspec_add_common_flag('-m32')
else:
conf.fatal("This mkspec is not supported on {0}.".format(
conf.get_mkspec_platform()))
def cxx_apple_llvm100_x64(conf):
"""
Detect and setup the 64-bit Apple LLVM 10.0 compiler
"""
if conf.is_mkspec_platform('mac'):
conf.mkspec_clang_configure(10, 0)
conf.mkspec_add_common_flag('-m64')
else:
conf.fatal("This mkspec is not supported on {0}.".format(
conf.get_mkspec_platform()))
def cxx_android5_gxx49_x86(conf):
"""
Detect and setup the Android 5.0+ g++ 4.9 compiler for x86
"""
conf.cxx_android_gxx49_x86()
# Only position independent executables (PIE) are supported on Android 5
# and above. The oldest version that can run a PIE binary is Android 4.1,
# so the binary will segfault on all older platforms.
conf.mkspec_add_common_flag('-fPIE')
conf.env['LINKFLAGS'] += ['-pie']
def cxx_android5_gxx49_x86(conf):
"""
Detect and setup the Android 5.0+ g++ 4.9 compiler for x86
"""
conf.cxx_android_gxx49_x86()
# Only position independent executables (PIE) are supported on Android 5
# and above. The oldest version that can run a PIE binary is Android 4.1,
# so the binary will segfault on all older platforms.
conf.mkspec_add_common_flag('-fPIE')
conf.env['LINKFLAGS'] += ['-pie']
def cxx_clang34_thread_sanitizer_x64(conf):
"""
Detect and setup the clang 3.4 compiler for 64 bit and use thread sanitizer
"""
"""
http://clang.llvm.org/docs/ThreadSanitizer.html
"""
conf.mkspec_clang_configure(3, 4, force_debug=True)
conf.mkspec_add_common_flag('-m64')
conf.mkspec_add_common_flag('-fsanitize=thread')
def cxx_android5_gxx49_x64(conf):
"""
Detect and setup the Android 5.0+ g++ 4.9 compiler for x86_64
"""
# Note: The x86_64 platform was introduced in Android 5 (API Level 21).
# Therefore the standalone toolchain must be created with the
# --api=21 option (or above).
conf.mkspec_gxx_android_configure(4, 9, 'x86_64-linux-android')
# The PIE binary must be the default in this case
conf.mkspec_add_common_flag('-fPIE')
conf.env['LINKFLAGS'] += ['-pie']
def cxx_android5_gxx49_x64(conf):
"""
Detect and setup the Android 5.0+ g++ 4.9 compiler for x86_64
"""
# Note: The x86_64 platform was introduced in Android 5 (API Level 21).
# Therefore the standalone toolchain must be created with the
# --api=21 option (or above).
conf.mkspec_gxx_android_configure(4, 9, 'x86_64-linux-android')
# The PIE binary must be the default in this case
conf.mkspec_add_common_flag('-fPIE')
conf.env['LINKFLAGS'] += ['-pie']
def cxx_clang34_thread_sanitizer_x64(conf):
"""
Detect and setup the clang 3.4 compiler for 64 bit and use thread sanitizer
"""
"""
http://clang.llvm.org/docs/ThreadSanitizer.html
"""
conf.mkspec_clang_configure(3, 4, force_debug=True)
conf.mkspec_add_common_flag('-m64')
conf.mkspec_add_common_flag('-fsanitize=thread')
def cxx_android5_clang38_armv7(conf):
"""
Detects and setup the Android 5.0+ clang 3.8 compiler for ARMv7
"""
conf.cxx_android_clang38_armv7()
# Only position independent executables (PIE) are supported on Android 5
# and above. The oldest version that can run a PIE binary is Android 4.1,
# so the binary will segfault on all older platforms.
conf.mkspec_add_common_flag('-fPIE')
# Only add the -pie flag when building programs (otherwise we get
# a warning when building libraries)
conf.env['LINKFLAGS_cprogram'] = ['-pie']
conf.env['LINKFLAGS_cxxprogram'] = ['-pie']
def mkspec_setup_clang_thread_sanitizer(conf,
major,
minor,
arch,
minimum=False):
"""
http://clang.llvm.org/docs/ThreadSanitizer.html
"""
conf.mkspec_clang_configure(major,
minor,
minimum=minimum,
force_debug=True)
conf.mkspec_add_common_flag(arch)
conf.mkspec_add_common_flag("-fsanitize=thread")
def cxx_android5_gxx49_arm64(conf):
"""
Detects and setup the Android 5.0+ g++ 4.9 compiler for ARM64
"""
# Note: The arm64 platform was introduced in Android 5 (API Level 21).
# Therefore the standalone toolchain must be created with the
# --api=21 option (or above).
# Only position independent executables (PIE) are supported on Android 5.
conf.mkspec_gxx_android_configure(4, 9, 'aarch64-linux-android')
conf.mkspec_add_common_flag('-fPIE')
conf.env['LINKFLAGS'] += ['-pie']
# Default "bfd" linker for the arm64 toolchain has an issue with linking
# shared libraries: https://github.com/android-ndk/ndk/issues/148
# Force the use of the "gold" linker until it becomes the default
conf.env['LINKFLAGS'] += ['-fuse-ld=gold']
conf.env['DEST_CPU'] = 'arm64'
def cxx_android5_gxx49_arm64(conf):
"""
Detects and setup the Android 5.0+ g++ 4.9 compiler for ARM64
"""
# Note: The arm64 platform was introduced in Android 5 (API Level 21).
# Therefore the standalone toolchain must be created with the
# --api=21 option (or above).
# Only position independent executables (PIE) are supported on Android 5.
conf.mkspec_gxx_android_configure(4, 9, 'aarch64-linux-android')
conf.mkspec_add_common_flag('-fPIE')
conf.env['LINKFLAGS'] += ['-pie']
# Default "bfd" linker for the arm64 toolchain has an issue with linking
# shared libraries: https://github.com/android-ndk/ndk/issues/148
# Force the use of the "gold" linker until it becomes the default
conf.env['LINKFLAGS'] += ['-fuse-ld=gold']
conf.env['DEST_CPU'] = 'arm64'
def mkspec_setup_clang_memory_sanitizer(conf, major, minor, arch):
"""
To get a reasonable performance add -O1 or higher. To get
meaningful stack traces in error messages add
-fno-omit-frame-pointer. To get perfect stack traces you may need
to disable inlining (just use -O1) and tail call elimination
(-fno-optimize-sibling-calls).
http://clang.llvm.org/docs/MemorySanitizer.html
"""
conf.mkspec_clang_configure(major, minor, force_debug=True)
conf.mkspec_add_common_flag(arch)
conf.mkspec_add_common_flag('-fsanitize=memory')
conf.mkspec_add_common_flag('-fsanitize-memory-track-origins')
conf.mkspec_add_common_flag('-fno-omit-frame-pointer')
conf.mkspec_add_common_flag('-fno-optimize-sibling-calls')
def mkspec_setup_gcov(conf, major, minor, minimum=False):
"""
Setup g++ for coverage analysis with gcov
"""
# Don't add any optimization flags (these might lead to incorrect results)
conf.env['MKSPEC_DISABLE_OPTIMIZATION'] = True
conf.mkspec_gxx_configure(major, minor, minimum=minimum)
# Set flag to compile and link code instrumented for coverage analysis
conf.mkspec_add_common_flag('--coverage')
# Add flags to disable optimization and all function inlining
flags = ['-O0', '-fPIC', '-fno-inline', '-fno-inline-small-functions',
'-fno-default-inline']
conf.env['CFLAGS'] += flags
conf.env['CXXFLAGS'] += flags
def mkspec_setup_gcov(conf, major, minor, minimum=False):
"""
Setup g++ for coverage analysis with gcov
"""
# Don't add any optimization flags (these might lead to incorrect results)
conf.env['MKSPEC_DISABLE_OPTIMIZATION'] = True
conf.mkspec_gxx_configure(major, minor, minimum=minimum)
# Set flag to compile and link code instrumented for coverage analysis
conf.mkspec_add_common_flag('--coverage')
# Add flags to disable optimization and all function inlining
flags = [
'-O0', '-fPIC', '-fno-inline', '-fno-inline-small-functions',
'-fno-default-inline'
]
conf.env['CFLAGS'] += flags
conf.env['CXXFLAGS'] += flags
def cxx_clang34_memory_sanitizer_x64(conf):
"""
Detect and setup the clang 3.4 compiler for 64 bit and use memory sanitizer
"""
"""
To get a reasonable performance add -O1 or higher. To get
meaningful stack traces in error messages add
-fno-omit-frame-pointer. To get perfect stack traces you may need
to disable inlining (just use -O1) and tail call elimination
(-fno-optimize-sibling-calls).
http://clang.llvm.org/docs/MemorySanitizer.html
"""
conf.mkspec_clang_configure(3, 4, force_debug=True)
conf.mkspec_add_common_flag('-m64')
conf.mkspec_add_common_flag('-fsanitize=memory')
conf.mkspec_add_common_flag('-fsanitize-memory-track-origins')
conf.mkspec_add_common_flag('-fno-omit-frame-pointer')
conf.mkspec_add_common_flag('-fno-optimize-sibling-calls')
def cxx_clang34_memory_sanitizer_x64(conf):
"""
Detect and setup the clang 3.4 compiler for 64 bit and use memory sanitizer
"""
"""
To get a reasonable performance add -O1 or higher. To get
meaningful stack traces in error messages add
-fno-omit-frame-pointer. To get perfect stack traces you may need
to disable inlining (just use -O1) and tail call elimination
(-fno-optimize-sibling-calls).
http://clang.llvm.org/docs/MemorySanitizer.html
"""
conf.mkspec_clang_configure(3, 4, force_debug=True)
conf.mkspec_add_common_flag('-m64')
conf.mkspec_add_common_flag('-fsanitize=memory')
conf.mkspec_add_common_flag('-fsanitize-memory-track-origins')
conf.mkspec_add_common_flag('-fno-omit-frame-pointer')
conf.mkspec_add_common_flag('-fno-optimize-sibling-calls')
def mkspec_setup_clang_memory_sanitizer(conf,
major,
minor,
arch,
minimum=False):
"""
To get a reasonable performance add -O1 or higher. To get
meaningful stack traces in error messages add
-fno-omit-frame-pointer. To get perfect stack traces you may need
to disable inlining (just use -O1) and tail call elimination
(-fno-optimize-sibling-calls).
http://clang.llvm.org/docs/MemorySanitizer.html
"""
conf.mkspec_clang_configure(major,
minor,
minimum=minimum,
force_debug=True)
conf.mkspec_add_common_flag(arch)
conf.mkspec_add_common_flag("-fsanitize=memory")
conf.mkspec_add_common_flag("-fsanitize-memory-track-origins")
conf.mkspec_add_common_flag("-fno-omit-frame-pointer")
conf.mkspec_add_common_flag("-fno-optimize-sibling-calls")
def mkspec_setup_clang_address_sanitizer(conf, major, minor, arch,
minimum=False):
"""
To get a reasonable performance add -O1 or higher. To get nicer
stack traces in error messages add -fno-omit-frame-pointer. To get
perfect stack traces you may need to disable inlining (just use
-O1) and tail call elimination (-fno-optimize-sibling-calls).
http://clang.llvm.org/docs/AddressSanitizer.html
"""
conf.mkspec_clang_configure(major, minor, minimum=minimum,
force_debug=True)
conf.mkspec_add_common_flag(arch)
conf.mkspec_add_common_flag('-fsanitize=address')
conf.mkspec_add_common_flag('-fno-omit-frame-pointer')
conf.mkspec_add_common_flag('-fno-optimize-sibling-calls')
def cxx_clang34_address_sanitizer_x86(conf):
"""
Detect and setup the clang 3.4 compiler for 32 bit and use address
sanitizer
"""
"""
To get a reasonable performance add -O1 or higher. To get nicer
stack traces in error messages add -fno-omit-frame-pointer. To get
perfect stack traces you may need to disable inlining (just use
-O1) and tail call elimination (-fno-optimize-sibling-calls).
http://clang.llvm.org/docs/AddressSanitizer.html
"""
conf.mkspec_clang_configure(3, 4, force_debug=True)
conf.mkspec_add_common_flag('-m32')
conf.mkspec_add_common_flag('-fsanitize=address')
conf.mkspec_add_common_flag('-fno-omit-frame-pointer')
conf.mkspec_add_common_flag('-fno-optimize-sibling-calls')
def cxx_clang34_address_sanitizer_x86(conf):
"""
Detect and setup the clang 3.4 compiler for 32 bit and use address
sanitizer
"""
"""
To get a reasonable performance add -O1 or higher. To get nicer
stack traces in error messages add -fno-omit-frame-pointer. To get
perfect stack traces you may need to disable inlining (just use
-O1) and tail call elimination (-fno-optimize-sibling-calls).
http://clang.llvm.org/docs/AddressSanitizer.html
"""
conf.mkspec_clang_configure(3, 4, force_debug=True)
conf.mkspec_add_common_flag('-m32')
conf.mkspec_add_common_flag('-fsanitize=address')
conf.mkspec_add_common_flag('-fno-omit-frame-pointer')
conf.mkspec_add_common_flag('-fno-optimize-sibling-calls')
def cxx_gxx73_x64(conf):
"""
Detect and setup the g++ 7.3 compiler for 64 bit
"""
conf.mkspec_gxx_configure(7, 3)
conf.mkspec_add_common_flag('-m64')
def cxx_gxx48_x64(conf):
"""
Detect and setup the g++ 4.8 compiler for 64 bit
"""
conf.mkspec_gxx_configure(4, 8)
conf.mkspec_add_common_flag('-m64')
def cxx_clang31_x86(conf):
"""
Detect and setup the clang 3.1 compiler for 32 bit
"""
conf.mkspec_clang_configure(3, 1)
conf.mkspec_add_common_flag('-m32')
def cxx_clang38_x64(conf):
"""
Detect and setup the clang 3.8 compiler for 64 bit
"""
conf.mkspec_clang_configure(3, 8)
conf.mkspec_add_common_flag("-m64")
def cxx_gxx49_x86(conf):
"""
Detect and setup the g++ 4.9 compiler for 32 bit
"""
conf.mkspec_gxx_configure(4, 9)
conf.mkspec_add_common_flag('-m32')
def cxx_gxx60_x64(conf):
"""
Detect and setup the g++ 6.0 compiler for 64 bit
"""
conf.mkspec_gxx_configure(6, 0)
conf.mkspec_add_common_flag('-m64')
def cxx_clang70_x86(conf):
"""
Detect and setup the clang 7.0 compiler for 32 bit
"""
conf.mkspec_clang_configure(7, 0)
conf.mkspec_add_common_flag('-m32')
def cxx_gxx61_x86(conf):
"""
Detect and setup the g++ 6.1 compiler for 32 bit
"""
conf.mkspec_gxx_configure(6, 1)
conf.mkspec_add_common_flag('-m32')
def cxx_clang30_x86(conf):
"""
Detect and setup the clang 3.0 compiler for 32 bit
"""
conf.mkspec_clang_configure(3, 0)
conf.mkspec_add_common_flag('-m32')
def cxx_gxx82_x64(conf):
"""
Detect and setup the g++ 8.2 compiler for 64 bit
"""
conf.mkspec_gxx_configure(8, 2)
conf.mkspec_add_common_flag('-m64')
def cxx_gxx92_x86(conf):
"""
Detect and setup the g++ 9.2 compiler for 32 bit
"""
conf.mkspec_gxx_configure(9, 2)
conf.mkspec_add_common_flag('-m32')
def cxx_gxx54_x86(conf):
"""
Detect and setup the g++ 5.4 compiler for 32 bit
"""
conf.mkspec_gxx_configure(5, 4)
conf.mkspec_add_common_flag('-m32')
def cxx_gxx54_x64(conf):
"""
Detect and setup the g++ 5.4 compiler for 64 bit
"""
conf.mkspec_gxx_configure(5, 4)
conf.mkspec_add_common_flag('-m64')
def cxx_clang140_x64(conf):
"""
Detect and setup the clang 14.0 compiler for 64 bit
"""
conf.mkspec_clang_configure(14, 0)
conf.mkspec_add_common_flag("-m64")
def cxx_gxx60_x64(conf):
"""
Detect and setup the g++ 6.0 compiler for 64 bit
"""
conf.mkspec_gxx_configure(6, 0)
conf.mkspec_add_common_flag('-m64')
def cxx_clang70_x86(conf):
"""
Detect and setup the clang 7.0 compiler for 32 bit
"""
conf.mkspec_clang_configure(7, 0)
conf.mkspec_add_common_flag("-m32")
def cxx_gxx61_x86(conf):
"""
Detect and setup the g++ 6.1 compiler for 32 bit
"""
conf.mkspec_gxx_configure(6, 1)
conf.mkspec_add_common_flag('-m32')
def cxx_clang39_x86(conf):
"""
Detect and setup the clang 3.9 compiler for 32 bit
"""
conf.mkspec_clang_configure(3, 9)
conf.mkspec_add_common_flag("-m32")
def cxx_gcov_gxx49_x64(conf):
"""
Configure g++ 4.9 (64 bit) for coverage analysis with gcov
"""
conf.mkspec_setup_gcov(4, 9)
conf.mkspec_add_common_flag('-m64')
def cxx_clang30_x64(conf):
"""
Detect and setup the clang 3.0 compiler for 64 bit
"""
conf.mkspec_clang_configure(3, 0)
conf.mkspec_add_common_flag('-m64')
def cxx_gxx49_x86(conf):
"""
Detect and setup the g++ 4.9 compiler for 32 bit
"""
conf.mkspec_gxx_configure(4, 9)
conf.mkspec_add_common_flag('-m32')
def cxx_gxx82_x64(conf):
"""
Detect and setup the g++ 8.2 compiler for 64 bit
"""
conf.mkspec_gxx_configure(8, 2)
conf.mkspec_add_common_flag('-m64')
def cxx_gxx83_x86(conf):
"""
Detect and setup the g++ 8.3 compiler for 32 bit
"""
conf.mkspec_gxx_configure(8, 3)
conf.mkspec_add_common_flag('-m32')
def cxx_gxx73_x64(conf):
"""
Detect and setup the g++ 7.3 compiler for 64 bit
"""
conf.mkspec_gxx_configure(7, 3)
conf.mkspec_add_common_flag('-m64')
def cxx_gxx72_x86(conf):
"""
Detect and setup the g++ 7.2 compiler for 32 bit
"""
conf.mkspec_gxx_configure(7, 2)
conf.mkspec_add_common_flag('-m32')
def cxx_gxx83_x86(conf):
"""
Detect and setup the g++ 8.3 compiler for 32 bit
"""
conf.mkspec_gxx_configure(8, 3)
conf.mkspec_add_common_flag('-m32')
def cxx_gxx74_x86(conf):
"""
Detect and setup the g++ 7.4 compiler for 32 bit
"""
conf.mkspec_gxx_configure(7, 4)
conf.mkspec_add_common_flag('-m32')
def cxx_clang31_x64(conf):
"""
Detect and setup the clang 3.1 compiler for 64 bit
"""
conf.mkspec_clang_configure(3, 1)
conf.mkspec_add_common_flag('-m64')
def cxx_gxx46_x86(conf):
"""
Detect and setup the g++ 4.6 compiler for 32 bit linux
"""
conf.mkspec_gxx_configure(4, 6)
conf.mkspec_add_common_flag('-m32')