cc: add min_sdk_version prop

min_sdk_version is the minimum version of the sdk that the compiled
artifacts will run against.

For example, when a module is used by two APEXes and their
min_sdk_versions are set to 29 and 30, then the module should support
both versions even if it is compiled against 30. Therefore,
min_sdk_version of the module needs to be set 29 in that case. In
general, this is set as the minimum value of min_sdk_vesions of APEXes.

For now, there's no build-time checks about this prop even if the prop
is set.

Bug: 145796956
Bug: 152655956
Bug: 153333044
Test: m nothing
Change-Id: I072ad8c317d2615e8b08e4e7ea2db8e7955b4b12

cc/cc.go

@@ -213,6 +213,9 @@ type BaseProperties struct {
 	// two variants to be built, one for the platform and one for apps.
 	Sdk_version *string
 
+	// Minimum sdk version that the artifact should support when it runs as part of mainline modules(APEX).
+	Min_sdk_version *string
+
 	// If true, always create an sdk variant and don't create a platform variant.
 	Sdk_variant_only *bool
 

sysprop/sysprop_library.go

@@ -151,6 +151,12 @@ type syspropLibraryProperties struct {
 
 	// Whether public stub exists or not.
 	Public_stub *bool `blueprint:"mutated"`
+
+	Cpp struct {
+		// Minimum sdk version that the artifact should support when it runs as part of mainline modules(APEX).
+		// Forwarded to cc_library.min_sdk_version
+		Min_sdk_version *string
+	}
 }
 
 var (
@@ -344,6 +350,7 @@ type ccLibraryProperties struct {
 	Vendor_available   *bool
 	Host_supported     *bool
 	Apex_available     []string
+	Min_sdk_version    *string
 }
 
 type javaLibraryProperties struct {
@@ -433,6 +440,7 @@ func syspropLibraryHook(ctx android.LoadHookContext, m *syspropLibrary) {
 	ccProps.Vendor_available = m.properties.Vendor_available
 	ccProps.Host_supported = m.properties.Host_supported
 	ccProps.Apex_available = m.ApexProperties.Apex_available
+	ccProps.Min_sdk_version = m.properties.Cpp.Min_sdk_version
 	ctx.CreateModule(cc.LibraryFactory, &ccProps)
 
 	scope := "internal"