# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
-# GN host architecture helpers.
-#
-# 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',
- }
- 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"
-
-BUILD_CC_toolchain-clang = "clang"
-BUILD_CXX_toolchain-clang = "clang++"
-BUILD_LD_toolchain-clang = "clang"
-
-# knob for clang, when using meta-clang to provide clang and case where
-# clang happens to be default compiler for OE we should let it use clang
-def is_default_cc_clang(d):
- """Return true if clang is default cross compiler."""
- toolchain = d.getVar("TOOLCHAIN")
- overrides = d.getVar("OVERRIDES")
- if toolchain == "clang" and "toolchain-clang" in overrides.split(":"):
- return "true"
- return "false"
-
-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
- gcc_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 = "${current_cpu}"\n'
- ' current_os = "linux"\n'
- ' is_clang = false\n'
- ' }\n'
- '}\n'
- )
- clang_toolchain_tmpl = string.Template(
- 'clang_toolchain("clang_${toolchain_name}") {\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 = "${current_cpu}"\n'
- ' current_os = "linux"\n'
- ' is_clang = true\n'
- ' use_gold = true\n'
- ' }\n'
- '}\n'
- )
-
- native_toolchain = {
- 'toolchain_name': 'yocto_native',
- 'current_cpu': gn_host_arch_name(d),
- 'cc': d.expand('${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('${TARGET_PREFIX}readelf'),
- 'extra_cflags': d.expand('${TARGET_CFLAGS}'),
- 'extra_cppflags': d.expand('${TARGET_CPPFLAGS}'),
- 'extra_cxxflags': d.expand('${TARGET_CXXFLAGS}'),
- 'extra_ldflags': d.expand('${TARGET_LDFLAGS}'),
- 'strip': '',
+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',
}
-
- with open(file_path, 'w') as toolchain_file:
- toolchain_file.write(
- '# This file has been generated automatically.\n'
- '\n'
- 'import("//build/config/sysroot.gni")\n'
- 'import("//build/toolchain/gcc_toolchain.gni")\n'
- '\n'
- )
- toolchain_file.write(gcc_toolchain_tmpl.substitute(native_toolchain))
- toolchain_file.write(gcc_toolchain_tmpl.substitute(target_toolchain))
- toolchain_file.write(clang_toolchain_tmpl.substitute(native_toolchain))
- toolchain_file.write(clang_toolchain_tmpl.substitute(target_toolchain))
+ try:
+ return translation_table[yocto_arch]
+ except KeyError:
+ bb.fatal('"%s" is not a supported architecture.' % yocto_arch)
Code Review / AGL / meta-agl-demo.git / blobdiff