C++: Remove AbstractCcLinkParamsStore from providers.

3 providers had AbstractCcLinkParamsStore as a class field, now they wrap
CcLinkingInfo instead.

This is being rolled forward, first try caused a NullPointerException in
go_wrap_cc rules that had the attribute use_default_import set to False.
GoWrapCcConfiguredTargetTest now has a go_wrap_cc rule that has this attribute
set to false and fails with the previous version of this CL.

RELNOTES:none
PiperOrigin-RevId: 205959266

2 files changed, 22 insertions, 2 deletions

diff --git a/src/main/java/com/google/devtools/build/lib/rules/cpp/CcBinary.java b/src/main/java/com/google/devtools/build/lib/rules/cpp/CcBinary.java
index 36aca5f7df..871def83e3 100644
--- a/src/main/java/com/google/devtools/build/lib/rules/cpp/CcBinary.java
+++ b/src/main/java/com/google/devtools/build/lib/rules/cpp/CcBinary.java
@@ -886,6 +886,16 @@ public abstract class CcBinary implements RuleConfiguredTargetFactory {
     ccCompilationInfoBuilder.setCcCompilationContext(ccCompilationContext);
 
     CcLinkingInfo.Builder ccLinkingInfoBuilder = CcLinkingInfo.Builder.create();
+    // TODO(b/111289526): Remove CcLinkingInfo provider from cc_binary as soon as the flag
+    // --experimental_enable_cc_dynlibs_for_runtime is flipped. An empty CcLinkParamsStore is not
+    // needed, but here we set it to avoid a null pointer exception in places where we're expecting
+    // it. In the future CcLinkParamsStore will be obligatory.
+    ccLinkingInfoBuilder.setCcLinkParamsStore(
+        new CcLinkParamsStore(
+            /* staticModeParamsForDynamicLibrary= */ CcLinkParams.EMPTY,
+            /* staticModeParamsForExecutable= */ CcLinkParams.EMPTY,
+            /* dynamicModeParamsForDynamicLibrary= */ CcLinkParams.EMPTY,
+            /* dynamicModeParamsForExecutable= */ CcLinkParams.EMPTY));
     if (cppConfiguration.enableCcDynamicLibrariesForRuntime()) {
       ccLinkingInfoBuilder.setCcDynamicLibrariesForRuntime(
           new CcDynamicLibrariesForRuntime(
diff --git a/src/main/java/com/google/devtools/build/lib/rules/cpp/CcLinkingInfo.java b/src/main/java/com/google/devtools/build/lib/rules/cpp/CcLinkingInfo.java
index 21494f7765..a8a27515af 100644
--- a/src/main/java/com/google/devtools/build/lib/rules/cpp/CcLinkingInfo.java
+++ b/src/main/java/com/google/devtools/build/lib/rules/cpp/CcLinkingInfo.java
@@ -30,6 +30,7 @@ import com.google.devtools.build.lib.syntax.FunctionSignature;
 import com.google.devtools.build.lib.syntax.Runtime;
 import com.google.devtools.build.lib.syntax.SkylarkType;
 import java.util.Collection;
+import java.util.stream.Stream;
 import javax.annotation.Nullable;
 
 /** Wrapper for every C++ linking provider. */
@@ -110,6 +111,16 @@ public final class CcLinkingInfo extends NativeInfo implements CcLinkingInfoApi
         }
       };
 
+  public static final CcLinkingInfo EMPTY =
+      CcLinkingInfo.Builder.create()
+          .setCcLinkParamsStore(
+              new CcLinkParamsStore(
+                  /* staticModeParamsForDynamicLibrary= */ CcLinkParams.EMPTY,
+                  /* staticModeParamsForExecutable= */ CcLinkParams.EMPTY,
+                  /* dynamicModeParamsForDynamicLibrary= */ CcLinkParams.EMPTY,
+                  /* dynamicModeParamsForExecutable= */ CcLinkParams.EMPTY))
+          .build();
+
   private final CcLinkParamsStore ccLinkParamsStore;
   // TODO(b/111289526): These providers are not useful. All the information they provide can be
   // obtained from CcLinkParams. CcRunfiles is already dead code and can be removed.
@@ -158,8 +169,7 @@ public final class CcLinkingInfo extends NativeInfo implements CcLinkingInfoApi
     CcLinkingInfo.Builder builder = new CcLinkingInfo.Builder();
     builder.setCcLinkParamsStore(
         CcLinkParamsStore.merge(
-            ccLinkingInfos
-                .stream()
+            Stream.concat(Stream.of(CcLinkingInfo.EMPTY), ccLinkingInfos.stream())
                 .map(CcLinkingInfo::getCcLinkParamsStore)
                 .collect(ImmutableList.toImmutableList())));
     return builder.build();