Add a new toolchain type for c++. In order to do this, PlatformConfiguration is made a legal configuration fragment for every rule class.

Add a default "dummy" c++ toolchain to prevent resolution errors when legacy toolchain selection logic is used.  Add toolchain mocks to java and shell tests.

PiperOrigin-RevId: 166854893

1 files changed, 92 insertions, 0 deletions

diff --git a/tools/platforms/BUILD b/tools/platforms/BUILD
index 4e788aea2c..1b74f106eb 100644
--- a/tools/platforms/BUILD
+++ b/tools/platforms/BUILD
@@ -13,3 +13,95 @@ filegroup(
     name = "srcs",
     srcs = glob(["**"]),
 )
+
+# These match values in //src/main/java/com/google/build/lib/util:CPU.java
+constraint_setting(name = "cpu")
+
+constraint_value(
+    name = "x86_32",
+    constraint_setting = ":cpu",
+)
+
+constraint_value(
+    name = "x86_64",
+    constraint_setting = ":cpu",
+)
+
+constraint_value(
+    name = "ppc",
+    constraint_setting = ":cpu",
+)
+
+constraint_value(
+    name = "arm",
+    constraint_setting = ":cpu",
+)
+
+constraint_value(
+    name = "s390x",
+    constraint_setting = ":cpu",
+)
+
+# These match values in //src/main/java/com/google/build/lib/util:OS.java
+constraint_setting(name = "os")
+
+constraint_value(
+    name = "osx",
+    constraint_setting = ":os",
+)
+
+constraint_value(
+    name = "freebsd",
+    constraint_setting = ":os",
+)
+
+constraint_value(
+    name = "linux",
+    constraint_setting = ":os",
+)
+
+constraint_value(
+    name = "windows",
+    constraint_setting = ":os",
+)
+
+# A default platform with nothing defined.
+platform(name = "default_platform")
+
+# A default platform referring to the host system. This only exists for
+# internal build configurations, and so shouldn't be accessed by other packages.
+platform(
+    name = "host_platform",
+    cpu_constraints = [
+        ":x86_32",
+        ":x86_64",
+        ":ppc",
+        ":arm",
+        ":s390x",
+    ],
+    host_platform = True,
+    os_constraints = [
+        ":osx",
+        ":freebsd",
+        ":linux",
+        ":windows",
+    ],
+)
+
+platform(
+    name = "target_platform",
+    cpu_constraints = [
+        ":x86_32",
+        ":x86_64",
+        ":ppc",
+        ":arm",
+        ":s390x",
+    ],
+    os_constraints = [
+        ":osx",
+        ":freebsd",
+        ":linux",
+        ":windows",
+    ],
+    target_platform = True,
+)