diff options
Diffstat (limited to 'scons')
| -rwxr-xr-x | scons/gallium.py | 38 |
1 files changed, 35 insertions, 3 deletions
diff --git a/scons/gallium.py b/scons/gallium.py index bd71e51df71..d13d0e67b83 100755 --- a/scons/gallium.py +++ b/scons/gallium.py @@ -36,6 +36,8 @@ import os.path import re import subprocess import platform as _platform +import sys +import tempfile import SCons.Action import SCons.Builder @@ -104,6 +106,28 @@ def num_jobs(): return 1 +def check_cc(env, cc, expr, cpp_opt = '-E'): + # Invoke C-preprocessor to determine whether the specified expression is + # true or not. + + sys.stdout.write('Checking for %s ... ' % cc) + + source = tempfile.NamedTemporaryFile(suffix='.c', delete=False) + source.write('#if !(%s)\n#error\n#endif\n' % expr) + source.close() + + pipe = SCons.Action._subproc(env, [env['CC'], cpp_opt, source.name], + stdin = 'devnull', + stderr = 'devnull', + stdout = 'devnull') + result = pipe.wait() == 0 + + os.unlink(source.name) + + sys.stdout.write(' %s\n' % ['no', 'yes'][int(bool(result))]) + return result + + def generate(env): """Common environment generation code""" @@ -137,10 +161,18 @@ def generate(env): if os.environ.has_key('LDFLAGS'): env['LINKFLAGS'] += SCons.Util.CLVar(os.environ['LDFLAGS']) - env['gcc'] = 'gcc' in os.path.basename(env['CC']).split('-') - env['msvc'] = env['CC'] == 'cl' + # Detect gcc/clang not by executable name, but through pre-defined macros + # as autoconf does, to avoid drawing wrong conclusions when using tools + # that overrice CC/CXX like scan-build. + env['gcc'] = 0 + env['clang'] = 0 + env['msvc'] = 0 + if _platform.system() == 'Windows': + env['msvc'] = check_cc(env, 'MSVC', 'defined(_MSC_VER)', '/E') + if not env['msvc']: + env['gcc'] = check_cc(env, 'GCC', 'defined(__GNUC__) && !defined(__clang__)') + env['clang'] = check_cc(env, 'Clang', '__clang__') env['suncc'] = env['platform'] == 'sunos' and os.path.basename(env['CC']) == 'cc' - env['clang'] = env['CC'] == 'clang' env['icc'] = 'icc' == os.path.basename(env['CC']) if env['msvc'] and env['toolchain'] == 'default' and env['machine'] == 'x86_64': |