Add os/target configurable selects for label list attributes.
This CL is pretty large, so I recommend starting with reading the newly
added tests for the expected behavior.
This change works in conjunction with the linked CLs in the Gerrit topic.
Those CLs add support for new platform() definitions for OS targets
specified in Soong's arch.go, which are configurable through
Android.bp's `target {}` property. It works similary to previous CLs
adding support for the `arch {}` property.
These configurable props are keyed by the OS: android, linux_bionic,
windows, and so on. They map to `select` statements in label list
attributes, which this CL enables for cc_library_headers' header_libs
and export_header_lib_headers props.
This enables //bionic/libc:libc_headers to be generated correctly, from:
cc_library_headers {
name: "libc_headers",
target: {
android: {
header_libs: ["libc_headers_arch"],
export_header_lib_headers: ["libc_headers_arch"],
},
linux_bionic: {
header_libs: ["libc_headers_arch"],
export_header_lib_headers: ["libc_headers_arch"],
},
},
// omitted props
}
to:
cc_library_headers(
name = "libc_headers",
deps = [] + select({
"//build/bazel/platforms/os:android": [
":libc_headers_arch",
],
"//build/bazel/platforms/os:linux_bionic": [
":libc_headers_arch",
],
"//conditions:default": [],
}),
)
Test: TH
Test: Verify generated //bionic/libc:libc_headers
Fixes: 183597786
Change-Id: I01016cc2cc9a71449f02300d747f01decebf3f6e
diff --git a/android/bazel_handler.go b/android/bazel_handler.go
index abc793f..65115d1 100644
--- a/android/bazel_handler.go
+++ b/android/bazel_handler.go
@@ -270,13 +270,23 @@
cmdFlags = append(cmdFlags, labels...)
cmdFlags = append(cmdFlags, "--package_path=%workspace%/"+context.intermediatesDir())
cmdFlags = append(cmdFlags, "--profile="+shared.BazelMetricsFilename(context, runName))
- // Set default platforms to canonicalized values for mixed builds requests. If these are set
- // in the bazelrc, they will have values that are non-canonicalized, and thus be invalid.
- // The actual platform values here may be overridden by configuration transitions from the buildroot.
+
+ // Set default platforms to canonicalized values for mixed builds requests.
+ // If these are set in the bazelrc, they will have values that are
+ // non-canonicalized to @sourceroot labels, and thus be invalid when
+ // referenced from the buildroot.
+ //
+ // The actual platform values here may be overridden by configuration
+ // transitions from the buildroot.
cmdFlags = append(cmdFlags,
- fmt.Sprintf("--platforms=%s", canonicalizeLabel("//build/bazel/platforms:generic_x86_64")))
+ fmt.Sprintf("--platforms=%s", canonicalizeLabel("//build/bazel/platforms:android_x86_64")))
cmdFlags = append(cmdFlags,
fmt.Sprintf("--extra_toolchains=%s", canonicalizeLabel("//prebuilts/clang/host/linux-x86:all")))
+ // This should be parameterized on the host OS, but let's restrict to linux
+ // to keep things simple for now.
+ cmdFlags = append(cmdFlags,
+ fmt.Sprintf("--host_platform=%s", canonicalizeLabel("//build/bazel/platforms:linux_x86_64")))
+
// Explicitly disable downloading rules (such as canonical C++ and Java rules) from the network.
cmdFlags = append(cmdFlags, "--experimental_repository_disable_download")
cmdFlags = append(cmdFlags, extraFlags...)
@@ -328,7 +338,7 @@
def _config_node_transition_impl(settings, attr):
return {
- "//command_line_option:platforms": "@sourceroot//build/bazel/platforms:generic_%s" % attr.arch,
+ "//command_line_option:platforms": "@sourceroot//build/bazel/platforms:android_%s" % attr.arch,
}
_config_node_transition = transition(
@@ -504,10 +514,10 @@
platform_name = build_options(target)["//command_line_option:platforms"][0].name
if platform_name == "host":
return "HOST"
- elif not platform_name.startswith("generic_"):
- fail("expected platform name of the form 'generic_<arch>', but was " + str(platforms))
+ elif not platform_name.startswith("android_"):
+ fail("expected platform name of the form 'android_<arch>', but was " + str(platforms))
return "UNKNOWN"
- return platform_name[len("generic_"):]
+ return platform_name[len("android_"):]
def format(target):
id_string = str(target.label) + "|" + get_arch(target)