# Copyright 2012-2016 The Meson development team # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # You may obtain a copy of the License at # http://www.apache.org/licenses/LICENSE-2.0 # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. import os, pickle, re from .. import build from .. import dependencies from .. import mesonlib from .. import mlog from .. import compilers import json import subprocess from ..mesonlib import MesonException, get_compiler_for_source, classify_unity_sources class CleanTrees: ''' Directories outputted by custom targets that have to be manually cleaned because on Linux `ninja clean` only deletes empty directories. ''' def __init__(self, build_dir, trees): self.build_dir = build_dir self.trees = trees class InstallData: def __init__(self, source_dir, build_dir, prefix): self.source_dir = source_dir self.build_dir = build_dir self.prefix = prefix self.targets = [] self.headers = [] self.man = [] self.data = [] self.po_package_name = '' self.po = [] self.install_scripts = [] self.install_subdirs = [] class ExecutableSerialisation: def __init__(self, name, fname, cmd_args, env, is_cross, exe_wrapper, workdir, extra_paths, capture): self.name = name self.fname = fname self.cmd_args = cmd_args self.env = env self.is_cross = is_cross self.exe_runner = exe_wrapper self.workdir = workdir self.extra_paths = extra_paths self.capture = capture class TestSerialisation: def __init__(self, name, suite, fname, is_cross, exe_wrapper, is_parallel, cmd_args, env, should_fail, timeout, workdir, extra_paths): self.name = name self.suite = suite self.fname = fname self.is_cross = is_cross self.exe_runner = exe_wrapper self.is_parallel = is_parallel self.cmd_args = cmd_args self.env = env self.should_fail = should_fail self.timeout = timeout self.workdir = workdir self.extra_paths = extra_paths # This class contains the basic functionality that is needed by all backends. # Feel free to move stuff in and out of it as you see fit. class Backend: def __init__(self, build): self.build = build self.environment = build.environment self.processed_targets = {} self.build_to_src = os.path.relpath(self.environment.get_source_dir(), self.environment.get_build_dir()) for t in self.build.targets: priv_dirname = self.get_target_private_dir_abs(t) os.makedirs(priv_dirname, exist_ok=True) def get_target_filename(self, t): if isinstance(t, build.CustomTarget): if len(t.get_outputs()) != 1: mlog.warning('custom_target {!r} has more than one output! ' 'Using the first one.'.format(t.name)) filename = t.get_outputs()[0] else: assert(isinstance(t, build.BuildTarget)) filename = t.get_filename() return os.path.join(self.get_target_dir(t), filename) def get_target_filename_abs(self, target): return os.path.join(self.environment.get_build_dir(), self.get_target_filename(target)) def get_target_filename_for_linking(self, target): # On some platforms (msvc for instance), the file that is used for # dynamic linking is not the same as the dynamic library itself. This # file is called an import library, and we want to link against that. # On all other platforms, we link to the library directly. if isinstance(target, build.SharedLibrary): link_lib = target.get_import_filename() or target.get_filename() return os.path.join(self.get_target_dir(target), link_lib) elif isinstance(target, build.StaticLibrary): return os.path.join(self.get_target_dir(target), target.get_filename()) raise AssertionError('BUG: Tried to link to something that\'s not a library') def get_target_debug_filename(self, target): fname = target.get_debug_filename() if not fname: raise AssertionError("BUG: Tried to generate debug filename when it doesn't exist") return os.path.join(self.get_target_dir(target), fname) def get_target_dir(self, target): if self.environment.coredata.get_builtin_option('layout') == 'mirror': dirname = target.get_subdir() else: dirname = 'meson-out' return dirname def get_target_private_dir(self, target): dirname = os.path.join(self.get_target_dir(target), target.get_basename() + target.type_suffix()) return dirname def get_target_private_dir_abs(self, target): dirname = os.path.join(self.environment.get_build_dir(), self.get_target_private_dir(target)) return dirname def get_target_generated_dir(self, target, gensrc, src): """ Takes a BuildTarget, a generator source (CustomTarget or GeneratedList), and a generated source filename. Returns the full path of the generated source relative to the build root """ # CustomTarget generators output to the build dir of the CustomTarget if isinstance(gensrc, build.CustomTarget): return os.path.join(self.get_target_dir(gensrc), src) # GeneratedList generators output to the private build directory of the # target that the GeneratedList is used in return os.path.join(self.get_target_private_dir(target), src) def get_unity_source_filename(self, target, suffix): return target.name + '-unity.' + suffix def generate_unity_files(self, target, unity_src): abs_files = [] result = [] compsrcs = classify_unity_sources(target.compilers.values(), unity_src) def init_language_file(suffix): outfilename = os.path.join(self.get_target_private_dir_abs(target), self.get_unity_source_filename(target, suffix)) outfileabs = os.path.join(self.environment.get_build_dir(), outfilename) outfileabs_tmp = outfileabs + '.tmp' abs_files.append(outfileabs) outfileabs_tmp_dir = os.path.dirname(outfileabs_tmp) if not os.path.exists(outfileabs_tmp_dir): os.makedirs(outfileabs_tmp_dir) result.append(outfilename) return open(outfileabs_tmp, 'w') # For each language, generate a unity source file and return the list for comp, srcs in compsrcs.items(): with init_language_file(comp.get_default_suffix()) as ofile: for src in srcs: ofile.write('#include<%s>\n' % src) [mesonlib.replace_if_different(x, x + '.tmp') for x in abs_files] return result def relpath(self, todir, fromdir): return os.path.relpath(os.path.join('dummyprefixdir', todir), os.path.join('dummyprefixdir', fromdir)) def flatten_object_list(self, target, proj_dir_to_build_root=''): obj_list = [] for obj in target.get_objects(): if isinstance(obj, str): o = os.path.join(proj_dir_to_build_root, self.build_to_src, target.get_subdir(), obj) obj_list.append(o) elif isinstance(obj, mesonlib.File): obj_list.append(obj.rel_to_builddir(self.build_to_src)) elif isinstance(obj, build.ExtractedObjects): obj_list += self.determine_ext_objs(obj, proj_dir_to_build_root) else: raise MesonException('Unknown data type in object list.') return obj_list def serialise_executable(self, exe, cmd_args, workdir, env={}, capture=None): import hashlib # Can't just use exe.name here; it will likely be run more than once if isinstance(exe, (dependencies.ExternalProgram, build.BuildTarget, build.CustomTarget)): basename = exe.name else: basename = os.path.basename(exe) # Take a digest of the cmd args, env, workdir, and capture. This avoids # collisions and also makes the name deterministic over regenerations # which avoids a rebuild by Ninja because the cmdline stays the same. data = bytes(str(sorted(env.items())) + str(cmd_args) + str(workdir) + str(capture), encoding='utf-8') digest = hashlib.sha1(data).hexdigest() scratch_file = 'meson_exe_{0}_{1}.dat'.format(basename, digest) exe_data = os.path.join(self.environment.get_scratch_dir(), scratch_file) with open(exe_data, 'wb') as f: if isinstance(exe, dependencies.ExternalProgram): exe_fullpath = exe.fullpath exe_needs_wrapper = False elif isinstance(exe, (build.BuildTarget, build.CustomTarget)): exe_fullpath = [self.get_target_filename_abs(exe)] exe_needs_wrapper = exe.is_cross else: exe_fullpath = [exe] exe_needs_wrapper = False is_cross = exe_needs_wrapper and \ self.environment.is_cross_build() and \ self.environment.cross_info.need_cross_compiler() and \ self.environment.cross_info.need_exe_wrapper() if is_cross: exe_wrapper = self.environment.cross_info.config['binaries'].get('exe_wrapper', None) else: exe_wrapper = None if mesonlib.is_windows(): extra_paths = self.determine_windows_extra_paths(exe) else: extra_paths = [] es = ExecutableSerialisation(basename, exe_fullpath, cmd_args, env, is_cross, exe_wrapper, workdir, extra_paths, capture) pickle.dump(es, f) return exe_data def serialise_tests(self): test_data = os.path.join(self.environment.get_scratch_dir(), 'meson_test_setup.dat') with open(test_data, 'wb') as datafile: self.write_test_file(datafile) benchmark_data = os.path.join(self.environment.get_scratch_dir(), 'meson_benchmark_setup.dat') with open(benchmark_data, 'wb') as datafile: self.write_benchmark_file(datafile) return test_data, benchmark_data def determine_linker(self, target): ''' If we're building a static library, there is only one static linker. Otherwise, we query the target for the dynamic linker. ''' if isinstance(target, build.StaticLibrary): if target.is_cross: return self.build.static_cross_linker else: return self.build.static_linker l = target.get_clike_dynamic_linker() if not l: m = "Couldn't determine linker for target {!r}" raise MesonException(m.format(target.name)) return l def object_filename_from_source(self, target, source): if isinstance(source, mesonlib.File): source = source.fname # foo.vala files compile down to foo.c and then foo.c.o, not foo.vala.o if source.endswith('.vala'): source = os.path.join(self.get_target_private_dir(target), source[:-5] + '.c') return source.replace('/', '_').replace('\\', '_') + '.' + self.environment.get_object_suffix() def determine_ext_objs(self, extobj, proj_dir_to_build_root): result = [] targetdir = self.get_target_private_dir(extobj.target) # With unity builds, there's just one object that contains all the # sources, and we only support extracting all the objects in this mode, # so just return that. if self.environment.coredata.get_builtin_option('unity'): comp = get_compiler_for_source(extobj.target.compilers.values(), extobj.srclist[0]) # The unity object name uses the full absolute path of the source file osrc = os.path.join(self.get_target_private_dir_abs(extobj.target), self.get_unity_source_filename(extobj.target, comp.get_default_suffix())) objname = self.object_filename_from_source(extobj.target, osrc) objpath = os.path.join(proj_dir_to_build_root, targetdir, objname) return [objpath] for osrc in extobj.srclist: objname = self.object_filename_from_source(extobj.target, osrc) objpath = os.path.join(proj_dir_to_build_root, targetdir, objname) result.append(objpath) return result def get_pch_include_args(self, compiler, target): args = [] pchpath = self.get_target_private_dir(target) includeargs = compiler.get_include_args(pchpath, False) for lang in ['c', 'cpp']: p = target.get_pch(lang) if len(p) == 0: continue if compiler.can_compile(p[-1]): header = p[0] args += compiler.get_pch_use_args(pchpath, header) if len(args) > 0: args = includeargs + args return args @staticmethod def escape_extra_args(compiler, args): # No extra escaping/quoting needed when not running on Windows if not mesonlib.is_windows(): return args extra_args = [] # Compiler-specific escaping is needed for -D args but not for any others if compiler.get_id() == 'msvc': # MSVC needs escaping when a -D argument ends in \ or \" for arg in args: if arg.startswith('-D') or arg.startswith('/D'): # Without extra escaping for these two, the next character # gets eaten if arg.endswith('\\'): arg += '\\' elif arg.endswith('\\"'): arg = arg[:-2] + '\\\\"' extra_args.append(arg) else: # MinGW GCC needs all backslashes in defines to be doubly-escaped # FIXME: Not sure about Cygwin or Clang for arg in args: if arg.startswith('-D') or arg.startswith('/D'): arg = arg.replace('\\', '\\\\') extra_args.append(arg) return extra_args def generate_basic_compiler_args(self, target, compiler, no_warn_args=False): commands = [] commands += self.get_cross_stdlib_args(target, compiler) commands += compiler.get_always_args() if no_warn_args: commands += compiler.get_no_warn_args() elif self.environment.coredata.get_builtin_option('buildtype') != 'plain': commands += compiler.get_warn_args(self.environment.coredata.get_builtin_option('warning_level')) commands += compiler.get_option_compile_args(self.environment.coredata.compiler_options) commands += self.build.get_global_args(compiler) commands += self.build.get_project_args(compiler, target.subproject) commands += self.environment.coredata.external_args[compiler.get_language()] commands += self.escape_extra_args(compiler, target.get_extra_args(compiler.get_language())) commands += compiler.get_buildtype_args(self.environment.coredata.get_builtin_option('buildtype')) if self.environment.coredata.get_builtin_option('werror'): commands += compiler.get_werror_args() if isinstance(target, build.SharedLibrary): commands += compiler.get_pic_args() if isinstance(target, build.StaticLibrary) and target.pic: commands += compiler.get_pic_args() for dep in target.get_external_deps(): # Cflags required by external deps might have UNIX-specific flags, # so filter them out if needed commands += compiler.unix_args_to_native(dep.get_compile_args()) if isinstance(target, build.Executable): commands += dep.get_exe_args() # Fortran requires extra include directives. if compiler.language == 'fortran': for lt in target.link_targets: priv_dir = os.path.join(self.get_target_dir(lt), lt.get_basename() + lt.type_suffix()) incflag = compiler.get_include_args(priv_dir, False) commands += incflag return commands def build_target_link_arguments(self, compiler, deps): args = [] for d in deps: if not isinstance(d, (build.StaticLibrary, build.SharedLibrary)): raise RuntimeError('Tried to link with a non-library target "%s".' % d.get_basename()) if isinstance(compiler, compilers.LLVMDCompiler): args += ['-L' + self.get_target_filename_for_linking(d)] else: args.append(self.get_target_filename_for_linking(d)) # If you have executable e that links to shared lib s1 that links to shared library s2 # you have to specify s2 as well as s1 when linking e even if e does not directly use # s2. Gcc handles this case fine but Clang does not for some reason. Thus we need to # explictly specify all libraries every time. args += self.build_target_link_arguments(compiler, d.get_dependencies()) return args def determine_windows_extra_paths(self, target): '''On Windows there is no such thing as an rpath. We must determine all locations of DLLs that this exe links to and return them so they can be used in unit tests.''' if not isinstance(target, build.Executable): return [] prospectives = target.get_transitive_link_deps() result = [] for ld in prospectives: if ld == '' or ld == '.': continue dirseg = os.path.join(self.environment.get_build_dir(), self.get_target_dir(ld)) if dirseg not in result: result.append(dirseg) return result def write_benchmark_file(self, datafile): self.write_test_serialisation(self.build.get_benchmarks(), datafile) def write_test_file(self, datafile): self.write_test_serialisation(self.build.get_tests(), datafile) def write_test_serialisation(self, tests, datafile): arr = [] for t in tests: exe = t.get_exe() if isinstance(exe, dependencies.ExternalProgram): fname = exe.fullpath else: fname = [os.path.join(self.environment.get_build_dir(), self.get_target_filename(t.get_exe()))] is_cross = self.environment.is_cross_build() and \ self.environment.cross_info.need_cross_compiler() and \ self.environment.cross_info.need_exe_wrapper() if is_cross: exe_wrapper = self.environment.cross_info.config['binaries'].get('exe_wrapper', None) else: exe_wrapper = None if mesonlib.is_windows(): extra_paths = self.determine_windows_extra_paths(exe) else: extra_paths = [] cmd_args = [] for a in t.cmd_args: if hasattr(a, 'held_object'): a = a.held_object if isinstance(a, mesonlib.File): a = os.path.join(self.environment.get_build_dir(), a.rel_to_builddir(self.build_to_src)) cmd_args.append(a) elif isinstance(a, str): cmd_args.append(a) elif isinstance(a, build.Target): cmd_args.append(self.get_target_filename(a)) else: raise MesonException('Bad object in test command.') ts = TestSerialisation(t.get_name(), t.suite, fname, is_cross, exe_wrapper, t.is_parallel, cmd_args, t.env, t.should_fail, t.timeout, t.workdir, extra_paths) arr.append(ts) pickle.dump(arr, datafile) def generate_depmf_install(self, d): if self.build.dep_manifest_name is None: return ifilename = os.path.join(self.environment.get_build_dir(), 'depmf.json') ofilename = os.path.join(self.environment.get_prefix(), self.build.dep_manifest_name) mfobj = {'type': 'dependency manifest', 'version': '1.0'} mfobj['projects'] = self.build.dep_manifest with open(ifilename, 'w') as f: f.write(json.dumps(mfobj)) # Copy file from, to, and with mode unchanged d.data.append([ifilename, ofilename, None]) def get_regen_filelist(self): '''List of all files whose alteration means that the build definition needs to be regenerated.''' deps = [os.path.join(self.build_to_src, df) for df in self.interpreter.get_build_def_files()] if self.environment.is_cross_build(): deps.append(os.path.join(self.build_to_src, self.environment.coredata.cross_file)) deps.append('meson-private/coredata.dat') if os.path.exists(os.path.join(self.environment.get_source_dir(), 'meson_options.txt')): deps.append(os.path.join(self.build_to_src, 'meson_options.txt')) for sp in self.build.subprojects.keys(): fname = os.path.join(self.environment.get_source_dir(), sp, 'meson_options.txt') if os.path.isfile(fname): deps.append(os.path.join(self.build_to_src, sp, 'meson_options.txt')) return deps def exe_object_to_cmd_array(self, exe): if self.environment.is_cross_build() and \ self.environment.cross_info.need_exe_wrapper() and \ isinstance(exe, build.BuildTarget) and exe.is_cross: if 'exe_wrapper' not in self.environment.cross_info.config['binaries']: s = 'Can not use target %s as a generator because it is cross-built\n' s += 'and no exe wrapper is defined. You might want to set it to native instead.' s = s % exe.name raise MesonException(s) if isinstance(exe, build.BuildTarget): exe_arr = [os.path.join(self.environment.get_build_dir(), self.get_target_filename(exe))] else: exe_arr = exe.get_command() return exe_arr def replace_extra_args(self, args, genlist): final_args = [] for a in args: if a == '@EXTRA_ARGS@': final_args += genlist.get_extra_args() else: final_args.append(a) return final_args def replace_outputs(self, args, private_dir, output_list): newargs = [] regex = re.compile('@OUTPUT(\d+)@') for arg in args: m = regex.search(arg) while m is not None: index = int(m.group(1)) src = '@OUTPUT%d@' % index arg = arg.replace(src, os.path.join(private_dir, output_list[index])) m = regex.search(arg) newargs.append(arg) return newargs def get_custom_target_provided_libraries(self, target): libs = [] for t in target.get_generated_sources(): if not isinstance(t, build.CustomTarget): continue for f in t.output: if self.environment.is_library(f): libs.append(os.path.join(self.get_target_dir(t), f)) return libs def get_custom_target_sources(self, target): ''' Custom target sources can be of various object types; strings, File, BuildTarget, even other CustomTargets. Returns the path to them relative to the build root directory. ''' srcs = [] for i in target.get_sources(): if hasattr(i, 'held_object'): i = i.held_object if isinstance(i, str): fname = [os.path.join(self.build_to_src, target.subdir, i)] elif isinstance(i, build.BuildTarget): fname = [self.get_target_filename(i)] elif isinstance(i, build.CustomTarget): fname = [os.path.join(self.get_target_dir(i), p) for p in i.get_outputs()] elif isinstance(i, build.GeneratedList): fname = [os.path.join(self.get_target_private_dir(target), p) for p in i.get_outputs()] else: fname = [i.rel_to_builddir(self.build_to_src)] if target.absolute_paths: fname = [os.path.join(self.environment.get_build_dir(), f) for f in fname] srcs += fname return srcs def eval_custom_target_command(self, target, absolute_outputs=False): # We only want the outputs to be absolute when using the VS backend if not absolute_outputs: ofilenames = [os.path.join(self.get_target_dir(target), i) for i in target.output] else: ofilenames = [os.path.join(self.environment.get_build_dir(), self.get_target_dir(target), i) for i in target.output] srcs = self.get_custom_target_sources(target) outdir = self.get_target_dir(target) # Many external programs fail on empty arguments. if outdir == '': outdir = '.' if target.absolute_paths: outdir = os.path.join(self.environment.get_build_dir(), outdir) cmd = [] for i in target.command: if isinstance(i, build.Executable): cmd += self.exe_object_to_cmd_array(i) continue elif isinstance(i, build.CustomTarget): # GIR scanner will attempt to execute this binary but # it assumes that it is in path, so always give it a full path. tmp = i.get_outputs()[0] i = os.path.join(self.get_target_dir(i), tmp) elif isinstance(i, mesonlib.File): i = i.rel_to_builddir(self.build_to_src) if target.absolute_paths: i = os.path.join(self.environment.get_build_dir(), i) # FIXME: str types are blindly added ignoring 'target.absolute_paths' elif not isinstance(i, str): err_msg = 'Argument {0} is of unknown type {1}' raise RuntimeError(err_msg.format(str(i), str(type(i)))) for (j, src) in enumerate(srcs): i = i.replace('@INPUT%d@' % j, src) for (j, res) in enumerate(ofilenames): i = i.replace('@OUTPUT%d@' % j, res) if '@INPUT@' in i: msg = 'Custom target {} has @INPUT@ in the command, but'.format(target.name) if len(srcs) == 0: raise MesonException(msg + ' no input files') if i == '@INPUT@': cmd += srcs continue else: if len(srcs) > 1: raise MesonException(msg + ' more than one input file') i = i.replace('@INPUT@', srcs[0]) elif '@OUTPUT@' in i: msg = 'Custom target {} has @OUTPUT@ in the command, but'.format(target.name) if len(ofilenames) == 0: raise MesonException(msg + ' no output files') if i == '@OUTPUT@': cmd += ofilenames continue else: if len(ofilenames) > 1: raise MesonException(msg + ' more than one output file') i = i.replace('@OUTPUT@', ofilenames[0]) elif '@OUTDIR@' in i: i = i.replace('@OUTDIR@', outdir) elif '@DEPFILE@' in i: if target.depfile is None: msg = 'Custom target {!r} has @DEPFILE@ but no depfile ' \ 'keyword argument.'.format(target.name) raise MesonException(msg) dfilename = os.path.join(outdir, target.depfile) i = i.replace('@DEPFILE@', dfilename) elif '@PRIVATE_OUTDIR_' in i: match = re.search('@PRIVATE_OUTDIR_(ABS_)?([^/\s*]*)@', i) if not match: msg = 'Custom target {!r} has an invalid argument {!r}' \ ''.format(target.name, i) raise MesonException(msg) source = match.group(0) if match.group(1) is None and not target.absolute_paths: lead_dir = '' else: lead_dir = self.environment.get_build_dir() i = i.replace(source, os.path.join(lead_dir, outdir)) cmd.append(i) # This should not be necessary but removing it breaks # building GStreamer on Windows. The underlying issue # is problems with quoting backslashes on Windows # which is the seventh circle of hell. The downside is # that this breaks custom targets whose command lines # have backslashes. If you try to fix this be sure to # check that it does not break GST. # # The bug causes file paths such as c:\foo to get escaped # into c:\\foo. # # Unfortunately we have not been able to come up with an # isolated test case for this so unless you manage to come up # with one, the only way is to test the building with Gst's # setup. Note this in your MR or ping us and we will get it # fixed. # # https://github.com/mesonbuild/meson/pull/737 cmd = [i.replace('\\', '/') for i in cmd] return srcs, ofilenames, cmd def run_postconf_scripts(self): env = {'MESON_SOURCE_ROOT': self.environment.get_source_dir(), 'MESON_BUILD_ROOT': self.environment.get_build_dir(), } child_env = os.environ.copy() child_env.update(env) for s in self.build.postconf_scripts: cmd = s['exe'] + s['args'] subprocess.check_call(cmd, env=child_env) # Subprojects of subprojects may cause the same dep args to be used # multiple times. Remove duplicates here. Note that we can't dedup # libraries based on name alone, because "-lfoo -lbar -lfoo" is # a completely valid (though pathological) sequence and removing the # latter may fail. Usually only applies to static libs, though. def dedup_arguments(self, commands): includes = {} final_commands = [] previous = '-fsuch_arguments=woof' for c in commands: if c.startswith(('-I', '-L', '/LIBPATH')): if c in includes: continue includes[c] = True if previous == c: continue previous = c final_commands.append(c) return final_commands