-# Permission is hereby granted, free of charge, to any person obtaining a copy
-# of this software and associated documentation files (the "Software"), to deal
-# in the Software without restriction, including without limitation the rights
-# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-# copies of the Software, and to permit persons to whom the Software is
-# furnished to do so, subject to the following conditions:
+# GN host architecture helpers.
#
-# The above copyright notice and this permission notice shall be included in
-# all copies or substantial portions of the Software.
+# Copied from https://github.com/OSSystems/meta-browser
#
-# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-# THE SOFTWARE.
-
-def gn_arch_name(yocto_arch):
- """Translates between Yocto's architecture values and the corresponding
- ones used by GN."""
- translation_table = {
- 'aarch64': 'arm64',
- 'arm': 'arm',
- 'i586': 'x86',
- 'i686': 'x86',
- 'x86_64': 'x64',
+# BUILD_ARCH's value corresponds to what uname returns as the machine name.
+# The mapping in gn_host_arch_name() tries to match several possible values
+# returned by the Linux kernel in uname(2) into the corresponding values GN
+# understands.
+
+def gn_host_arch_name(d):
+ """Returns a GN architecture name corresponding to the build host's machine
+ architecture."""
+ import re
+ arch_translations = {
+ r'aarch64.*': 'arm64',
+ r'arm.*': 'arm',
+ r'i[3456]86$': 'x86',
+ r'x86_64$': 'x64',
}
- try:
- return translation_table[yocto_arch]
- except KeyError:
- bb.fatal('"%s" is not a supported architecture.' % yocto_arch)
+ build_arch = d.getVar("BUILD_ARCH")
+ for arch_regexp, gn_arch_name in arch_translations.items():
+ if re.match(arch_regexp, build_arch):
+ return gn_arch_name
+ bb.fatal('Unsuported BUILD_ARCH value: "%s"' % build_arch)
+
+# GN target architecture helpers.
+#
+# Determining the target architecture is more difficult, as there are many
+# different values we can use on the Yocto side (e.g. TUNE_ARCH, TARGET_ARCH,
+# MACHINEOVERRIDES etc). What we do is define the mapping with regular,
+# non-Python variables with overrides that are generic enough (i.e. "x86"
+# instead of "i586") and then use gn_target_arch_name() to return the right
+# value with some validation.
+GN_TARGET_ARCH_NAME:aarch64 = "arm64"
+GN_TARGET_ARCH_NAME:arm = "arm"
+GN_TARGET_ARCH_NAME:x86 = "x86"
+GN_TARGET_ARCH_NAME:x86-64 = "x64"
+
+def clang_install_path(d):
+ """Return clang compiler install path."""
+ return d.getVar("STAGING_BINDIR_NATIVE")
+
+def gn_target_arch_name(d):
+ """Returns a GN architecture name corresponding to the target machine's
+ architecture."""
+ name = d.getVar("GN_TARGET_ARCH_NAME")
+ if name is None:
+ bb.fatal('Unsupported target architecture. A valid override for the '
+ 'GN_TARGET_ARCH_NAME variable could not be found.')
+ return name
+
+def write_toolchain_file(d, file_path):
+ """Creates a complete GN toolchain file in |file_path|."""
+ import string
+ # Even though we always use clang, the "clang_toolchain" GN template is too
+ # restrictive in the way it sets variables such as |cxx|. Since it is just
+ # a wrapper on top of the "gcc_toolchain" template, we keep using the
+ # latter directly to accommodate our cross-compilation needs.
+ toolchain_tmpl = string.Template(
+ 'gcc_toolchain("${toolchain_name}") {\n'
+ ' cc = "${cc}"\n'
+ ' cxx = "${cxx}"\n'
+ ' ar = "${ar}"\n'
+ ' ld = cxx # GN expects a compiler, not a linker.\n'
+ ' nm = "${nm}"\n'
+ ' readelf = "${readelf}"\n'
+ ' extra_cflags = "${extra_cflags}"\n'
+ ' extra_cppflags = "${extra_cppflags}"\n'
+ ' extra_cxxflags = "${extra_cxxflags}"\n'
+ ' extra_ldflags = "${extra_ldflags}"\n'
+ ' toolchain_args = {\n'
+ ' current_cpu = "${current_cpu}"\n'
+ ' current_os = "linux"\n'
+ ' is_clang = true\n'
+ ' }\n'
+ '}\n'
+ )
+
+ native_toolchain = {
+ 'toolchain_name': 'yocto_native',
+ 'current_cpu': gn_host_arch_name(d),
+ 'cc': d.expand('${BUILD_CC}'),
+ 'cxx': d.expand('${BUILD_CXX}'),
+ 'ar': d.expand('${BUILD_AR}'),
+ 'nm': d.expand('${BUILD_NM}'),
+ 'readelf': d.expand('${BUILD_PREFIX}readelf'),
+ 'extra_cflags': d.expand('${BUILD_CFLAGS}'),
+ 'extra_cppflags': d.expand('${BUILD_CPPFLAGS}'),
+ 'extra_cxxflags': d.expand('${BUILD_CXXFLAGS}'),
+ 'extra_ldflags': d.expand('${BUILD_LDFLAGS}'),
+ }
+ target_toolchain = {
+ 'toolchain_name': 'yocto_target',
+ 'current_cpu': gn_target_arch_name(d),
+ 'cc': d.expand('${CC}'),
+ 'cxx': d.expand('${CXX}'),
+ 'ar': d.expand('${AR}'),
+ 'nm': d.expand('${NM}'),
+ 'readelf': d.expand('${READELF}'),
+ 'extra_cflags': d.expand('${CFLAGS}'),
+ 'extra_cppflags': d.expand('${CPPFLAGS}'),
+ 'extra_cxxflags': d.expand('${CXXFLAGS}'),
+ 'extra_ldflags': d.expand('${LDFLAGS}'),
+ }
+
+ with open(file_path, 'w') as toolchain_file:
+ toolchain_file.write(
+ '# This file has been generated automatically.\n'
+ '\n'
+ 'import("//build/toolchain/gcc_toolchain.gni")\n'
+ '\n'
+ )
+ toolchain_file.write(toolchain_tmpl.substitute(native_toolchain))
+ toolchain_file.write(toolchain_tmpl.substitute(target_toolchain))
+
Code Review / AGL / meta-agl-demo.git / blobdiff