def _get_default_compiler(output):
"""
find the default compiler on the build machine
search order and priority:
1. CC and CXX environment variables are always top priority
2. Visual Studio detection (Windows only) via vswhere or registry or environment variables
3. Apple Clang (Mac only)
4. cc executable
5. gcc executable
6. clang executable
"""
v2_mode = get_env(CONAN_V2_MODE_ENVVAR, False)
cc = os.environ.get("CC", "")
cxx = os.environ.get("CXX", "")
if cc or cxx: # Env defined, use them
output.info("CC and CXX: %s, %s " % (cc or "None", cxx or "None"))
command = cc or cxx
if v2_mode:
compiler = _get_compiler_and_version(output, command)
if compiler:
return compiler
else:
if "gcc" in command:
gcc = _gcc_compiler(output, command)
if platform.system() == "Darwin" and gcc is None:
output.error(
"%s detected as a frontend using apple-clang. "
"Compiler not supported" % command)
return gcc
if "clang" in command.lower():
return _clang_compiler(output, command)
if platform.system() == "SunOS" and command.lower() == "cc":
return _sun_cc_compiler(output, command)
# I am not able to find its version
output.error("Not able to automatically detect '%s' version" % command)
return None
vs = cc = sun_cc = None
if detected_os() == "Windows":
version = latest_visual_studio_version_installed(output)
vs = ('Visual Studio', version) if version else None
if v2_mode:
cc = _get_compiler_and_version(output, "cc")
gcc = _get_compiler_and_version(output, "gcc")
clang = _get_compiler_and_version(output, "clang")
else:
gcc = _gcc_compiler(output)
clang = _clang_compiler(output)
if platform.system() == "SunOS":
sun_cc = _sun_cc_compiler(output)
if detected_os() == "Windows":
return vs or cc or gcc or clang
elif platform.system() == "Darwin":
return clang or cc or gcc
elif platform.system() == "SunOS":
return sun_cc or cc or gcc or clang
else:
return cc or gcc or clang
def _get_default_compiler(output):
cc = os.environ.get("CC", "")
cxx = os.environ.get("CXX", "")
if cc or cxx: # Env defined, use them
output.info("CC and CXX: %s, %s " % (cc or "None", cxx or "None"))
command = cc or cxx
if "gcc" in command:
gcc = _gcc_compiler(output, command)
if platform.system() == "Darwin" and gcc is None:
output.error(
"%s detected as a frontend using apple-clang. Compiler not supported"
% command)
return gcc
if "clang" in command.lower():
return _clang_compiler(output, command)
if platform.system() == "SunOS" and command.lower() == "cc":
return _sun_cc_compiler(output, command)
# I am not able to find its version
output.error("Not able to automatically detect '%s' version" % command)
return None
if detected_os() == "Windows":
version = latest_visual_studio_version_installed(output)
vs = ('Visual Studio', version) if version else None
gcc = _gcc_compiler(output)
clang = _clang_compiler(output)
if platform.system() == "SunOS":
sun_cc = _sun_cc_compiler(output)
if detected_os() == "Windows":
return vs or gcc or clang
elif platform.system() == "Darwin":
return clang or gcc
elif platform.system() == "SunOS":
return sun_cc or gcc or clang
else:
return gcc or clang