1 # -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
2 # vim: set filetype=python:
3 # This Source Code Form is subject to the terms of the Mozilla Public
4 # License, v. 2.0. If a copy of the MPL was not distributed with this
5 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
8 option(env="CBINDGEN", nargs=1, help="Path to cbindgen")
11 @imports(_from="textwrap", _import="dedent")
12 def check_cbindgen_version(cbindgen, fatal=False):
13 log.debug("trying cbindgen: %s" % cbindgen)
15 cbindgen_min_version = Version("0.26.0")
18 version = Version(check_cmd_output(cbindgen, "--version").strip().split(" ")[1])
19 log.debug("%s has version %s" % (cbindgen, version))
20 if version >= cbindgen_min_version:
28 cbindgen version {} is too old. At least version {} is required.
30 Please update using 'cargo install cbindgen --force' or running
31 './mach bootstrap', after removing the existing executable located at
34 version, cbindgen_min_version, cbindgen
40 # Similar behavior to what check_prog does.
41 has_cbindgen_input = depends("CBINDGEN")(lambda x: x)
42 bootstrap_cbindgen = depends(has_cbindgen_input)(lambda i: not i)
47 bootstrap_search_path("cbindgen", when=bootstrap_cbindgen),
50 @checking("for cbindgen")
51 @imports(_from="textwrap", _import="dedent")
52 def cbindgen(cbindgen_override, bootstrap_search_path, rust_search_path):
54 check_cbindgen_version(cbindgen_override[0], fatal=True)
55 return cbindgen_override[0]
58 for path in bootstrap_search_path + rust_search_path:
59 candidate = find_program("cbindgen", [path])
62 if check_cbindgen_version(candidate):
64 candidates.append(candidate)
67 raise FatalCheckError(
70 Cannot find cbindgen. Please run `mach bootstrap`,
71 `cargo install cbindgen`, ensure that `cbindgen` is on your PATH,
72 or point at an executable with `CBINDGEN`.
76 check_cbindgen_version(candidates[0], fatal=True)
79 set_config("CBINDGEN", cbindgen)
81 # Bindgen can use rustfmt to format Rust file, but it's not required.
82 option(env="RUSTFMT", nargs=1, help="Path to the rustfmt program")
87 paths=rust_search_path,
94 "--with-libclang-path",
96 help="Absolute path to a directory containing Clang/LLVM libraries for bindgen (version 3.9.x or above)",
101 help="Absolute path to a Clang binary for bindgen (version 3.9.x or above)",
115 @checking("for clang for bindgen", lambda x: x.path if x else "not found")
116 def bindgen_clang_compiler(
126 # When the target compiler is clang, use that, including flags.
127 if cxx_compiler.type == "clang":
128 if clang_path and clang_path[0] not in (
130 cxx_compiler.compiler,
133 "--with-clang-path is not valid when the target compiler is %s",
137 path=cxx_compiler.compiler,
138 flags=cxx_compiler.flags,
140 # When the target compiler is clang-cl, use clang in the same directory,
141 # and figure the right flags to use.
142 if cxx_compiler.type == "clang-cl":
143 if clang_path and os.path.dirname(clang_path[0]) != os.path.dirname(
144 cxx_compiler.compiler
147 "--with-clang-path must point to clang in the same directory "
148 "as the target compiler"
151 clang_path = [os.path.join(os.path.dirname(cxx_compiler.compiler), "clang")]
153 clang_path = find_program(
154 clang_path[0] if clang_path else "clang++", clang_search_path
158 # Hack before bug 1617793: if the compiler is clang-cl, hack the target
159 if cxx_compiler.type == "clang-cl":
160 target = split_triplet("%s-pc-windows-msvc" % target.raw_cpu)
163 flags.extend(("--sysroot", sysroot_path))
164 info = check_compiler(
165 configure_cache, [clang_path] + flags, "C++", target, android_version
167 # Usually, one check_compiler pass would be enough, but when cross-compiling
168 # and the host and target don't use the same default C++ standard, we don't
169 # get the --std flag, so try again. This is the same thing as valid_compiler()
170 # does in toolchain.configure.
173 info = check_compiler(
174 configure_cache, [clang_path] + flags, "C++", target, android_version
178 flags=flags + info.flags,
182 @depends("--with-libclang-path", bindgen_clang_compiler, host_library_name_info, host)
183 @checking("for libclang for bindgen", lambda x: x if x else "not found")
185 @imports(_from="os", _import="pathsep")
186 @imports(_from="os.path", _import="split", _as="pathsplit")
188 def bindgen_libclang_path(libclang_path, clang, library_name_info, host):
192 "--with-libclang-path is not valid without a clang compiler "
197 # Try to ensure that the clang shared library that bindgen is going
198 # to look for is actually present. The files that we search for
199 # mirror the logic in clang-sys/build.rs.
200 libclang_choices = []
201 if host.os == "WINNT":
202 libclang_choices.append("libclang.dll")
203 libclang_choices.append(
204 "%sclang%s" % (library_name_info.dll.prefix, library_name_info.dll.suffix)
206 if host.kernel == "Linux":
207 libclang_choices.append("libclang.so.*")
209 if host.os == "OpenBSD":
210 libclang_choices.append("libclang.so.*.*")
213 if not libclang_path:
214 # Try to find libclang_path based on clang search dirs.
215 clang_search_dirs = check_cmd_output(clang.path, "-print-search-dirs")
216 for line in clang_search_dirs.splitlines():
217 name, _, value = line.partition(": =")
218 if host.os == "WINNT" and name == "programs":
219 # On Windows, libclang.dll is in bin/ rather than lib/,
220 # so scan the programs search dirs.
221 # To make matters complicated, clang before version 9 uses `:`
222 # separate between paths (and `;` in newer versions)
224 candidates.extend(value.split(pathsep))
226 for part in value.split(":"):
227 # Assume that if previous "candidate" was of length 1,
228 # it's a drive letter and the current part is the rest of
229 # the corresponding full path.
230 if candidates and len(candidates[-1]) == 1:
231 candidates[-1] += ":" + part
233 candidates.append(part)
234 elif host.os != "WINNT" and name == "libraries":
235 # On other platforms, use the directories from the libraries
236 # search dirs that looks like $something/clang/$version.
237 for dir in value.split(pathsep):
238 dir, version = pathsplit(dir)
239 if re.match(r"[0-9.]+", version):
240 dir, name = pathsplit(dir)
242 candidates.append(dir)
244 candidates.append(libclang_path[0])
246 for dir in candidates:
247 for pattern in libclang_choices:
248 log.debug('Trying "%s" in "%s"', pattern, dir)
249 libs = glob.glob(os.path.join(dir, pattern))
254 @depends(bindgen_clang_compiler, bindgen_libclang_path, build_project)
255 def bindgen_config_paths(clang, libclang, build_project):
256 # XXX: we want this code to be run for both Gecko and JS, but we don't
257 # necessarily want to force a bindgen/Rust dependency on JS just yet.
258 # Actually, we don't want to force an error if we're not building the
259 # browser generally. We therefore whitelist the projects that require
260 # bindgen facilities at this point and leave it at that.
261 if build_project in ("browser", "mobile/android"):
264 "Could not find clang to generate run bindings for C/C++. "
265 "Please install the necessary packages, run `mach bootstrap`, "
266 "or use --with-clang-path to give the location of clang."
271 "Could not find libclang to generate rust bindings for C/C++. "
272 "Please install the necessary packages, run `mach bootstrap`, "
273 "or use --with-libclang-path to give the path containing it."
276 if clang and libclang:
279 libclang_path=os.path.dirname(libclang),
280 clang_path=clang.path,
281 clang_flags=clang.flags,
285 @depends(bindgen_config_paths.libclang, when=bindgen_config_paths)
286 @checking("that libclang is new enough", lambda s: "yes" if s else "no")
287 @imports(_from="ctypes", _import="CDLL")
288 @imports(_from="textwrap", _import="dedent")
289 def min_libclang_version(libclang):
292 # We want at least 5.0. The API we test below is enough for that.
293 # Just accessing it should throw if not found.
294 fun = lib.clang_getAddressSpace
300 The libclang located at {} is too old (need at least 5.0).
302 Please make sure to update it or point to a newer libclang using
303 --with-libclang-path.
312 set_config("MOZ_LIBCLANG_PATH", bindgen_config_paths.libclang_path)
313 set_config("MOZ_CLANG_PATH", bindgen_config_paths.clang_path)
319 bindgen_cflags_android,
320 bindgen_config_paths.clang_flags,
323 def basic_bindgen_cflags(
324 target, compiler_info, android_cflags, clang_flags, all_arm_flags
329 "-fno-sized-deallocation",
333 "-DMOZILLA_INTERNAL_API",
337 if target.os == "Android":
338 args += android_cflags
346 if compiler_info.type == "clang-cl":
348 # To enable the builtin __builtin_offsetof so that CRT wouldn't
349 # use reinterpret_cast in offsetof() which is not allowed inside
351 "-D_CRT_USE_BUILTIN_OFFSETOF",
352 # Enable hidden attribute (which is not supported by MSVC and
353 # thus not enabled by default with a MSVC-compatibile build)
354 # to exclude hidden symbols from the generated file.
355 "-DHAVE_VISIBILITY_HIDDEN_ATTRIBUTE=1",
358 return args + (clang_flags or []) + (all_arm_flags or [])
362 env="BINDGEN_CFLAGS",
364 help="Options bindgen should pass to the C/C++ parser",
368 @depends(basic_bindgen_cflags, "BINDGEN_CFLAGS")
369 @checking("bindgen cflags", lambda s: s if s else "no")
370 def bindgen_cflags(base_flags, extra_flags):
372 if extra_flags and len(extra_flags):
373 flags += extra_flags[0].split()
374 return " ".join(flags)
377 set_config("BINDGEN_SYSTEM_FLAGS", bindgen_cflags)