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mirror of https://github.com/MarlinFirmware/Marlin.git synced 2024-12-11 13:04:35 +00:00
MarlinFirmware/buildroot/share/PlatformIO/scripts/preprocessor.py
2022-09-05 13:19:19 -05:00

95 lines
2.7 KiB
Python

#
# preprocessor.py
#
import subprocess
nocache = 1
verbose = 0
def blab(str):
if verbose:
print(str)
################################################################################
#
# Invoke GCC to run the preprocessor and extract enabled features
#
preprocessor_cache = {}
def run_preprocessor(env, fn=None):
filename = fn or 'buildroot/share/PlatformIO/scripts/common-dependencies.h'
if filename in preprocessor_cache:
return preprocessor_cache[filename]
# Process defines
build_flags = env.get('BUILD_FLAGS')
build_flags = env.ParseFlagsExtended(build_flags)
cxx = search_compiler(env)
cmd = ['"' + cxx + '"']
# Build flags from board.json
#if 'BOARD' in env:
# cmd += [env.BoardConfig().get("build.extra_flags")]
for s in build_flags['CPPDEFINES']:
if isinstance(s, tuple):
cmd += ['-D' + s[0] + '=' + str(s[1])]
else:
cmd += ['-D' + s]
cmd += ['-D__MARLIN_DEPS__ -w -dM -E -x c++']
depcmd = cmd + [ filename ]
cmd = ' '.join(depcmd)
blab(cmd)
try:
define_list = subprocess.check_output(cmd, shell=True).splitlines()
except:
define_list = {}
preprocessor_cache[filename] = define_list
return define_list
################################################################################
#
# Find a compiler, considering the OS
#
def search_compiler(env):
from pathlib import Path, PurePath
ENV_BUILD_PATH = Path(env['PROJECT_BUILD_DIR'], env['PIOENV'])
GCC_PATH_CACHE = ENV_BUILD_PATH / ".gcc_path"
try:
gccpath = env.GetProjectOption('custom_gcc')
blab("Getting compiler from env")
return gccpath
except:
pass
# Warning: The cached .gcc_path will obscure a newly-installed toolkit
if not nocache and GCC_PATH_CACHE.exists():
blab("Getting g++ path from cache")
return GCC_PATH_CACHE.read_text()
# Use any item in $PATH corresponding to a platformio toolchain bin folder
path_separator = ':'
gcc_exe = '*g++'
if env['PLATFORM'] == 'win32':
path_separator = ';'
gcc_exe += ".exe"
# Search for the compiler in PATH
for ppath in map(Path, env['ENV']['PATH'].split(path_separator)):
if ppath.match(env['PROJECT_PACKAGES_DIR'] + "/**/bin"):
for gpath in ppath.glob(gcc_exe):
gccpath = str(gpath.resolve())
# Cache the g++ path to no search always
if not nocache and ENV_BUILD_PATH.exists():
blab("Caching g++ for current env")
GCC_PATH_CACHE.write_text(gccpath)
return gccpath
gccpath = env.get('CXX')
blab("Couldn't find a compiler! Fallback to %s" % gccpath)
return gccpath