Remove DynamicModeFlag and thus fix crash caused by passing --dynamic_mode=auto on the command line.

--
PiperOrigin-RevId: 147824992
MOS_MIGRATED_REVID=147824992

src/main/java/com/google/devtools/build/lib/rules/android/AndroidConfiguration.java

diff --git a/src/main/java/com/google/devtools/build/lib/rules/android/AndroidConfiguration.java b/src/main/java/com/google/devtools/build/lib/rules/android/AndroidConfiguration.java
index b57165e..b692357 100644
--- a/src/main/java/com/google/devtools/build/lib/rules/android/AndroidConfiguration.java
+++ b/src/main/java/com/google/devtools/build/lib/rules/android/AndroidConfiguration.java
@@ -30,8 +30,8 @@
 import com.google.devtools.build.lib.cmdline.Label;
 import com.google.devtools.build.lib.concurrent.ThreadSafety.Immutable;
 import com.google.devtools.build.lib.packages.Attribute.SplitTransition;
+import com.google.devtools.build.lib.rules.cpp.CppConfiguration.DynamicMode;
 import com.google.devtools.build.lib.rules.cpp.CppOptions.DynamicModeConverter;
-import com.google.devtools.build.lib.rules.cpp.CppOptions.DynamicModeFlag;
 import com.google.devtools.common.options.Converter;
 import com.google.devtools.common.options.Converters;
 import com.google.devtools.common.options.EnumConverter;
@@ -250,7 +250,7 @@
             + "whether to link dynamically.  'fully' means all libraries will be linked "
             + "dynamically. 'off' means that all libraries will be linked in mostly static mode."
     )
-    public DynamicModeFlag dynamicMode;
+    public DynamicMode dynamicMode;
 
     // Label of filegroup combining all Android tools used as implicit dependencies of
     // android_* rules

src/main/java/com/google/devtools/build/lib/rules/cpp/CppConfiguration.java

diff --git a/src/main/java/com/google/devtools/build/lib/rules/cpp/CppConfiguration.java b/src/main/java/com/google/devtools/build/lib/rules/cpp/CppConfiguration.java
index c0a7f69..9441fbe 100644
--- a/src/main/java/com/google/devtools/build/lib/rules/cpp/CppConfiguration.java
+++ b/src/main/java/com/google/devtools/build/lib/rules/cpp/CppConfiguration.java
@@ -384,13 +384,7 @@
       // TODO(bazel-team): implement dynamic linking with LIPO
       this.dynamicMode = DynamicMode.OFF;
     } else {
-      switch (cppOptions.dynamicMode) {
-        case DEFAULT:
-          this.dynamicMode = DynamicMode.DEFAULT; break;
-        case OFF: this.dynamicMode = DynamicMode.OFF; break;
-        case FULLY: this.dynamicMode = DynamicMode.FULLY; break;
-        default: throw new IllegalStateException("Invalid dynamicMode.");
-      }
+      this.dynamicMode = cppOptions.dynamicMode;
     }
 
     this.fdoZip = params.fdoZip;

src/main/java/com/google/devtools/build/lib/rules/cpp/CppOptions.java

diff --git a/src/main/java/com/google/devtools/build/lib/rules/cpp/CppOptions.java b/src/main/java/com/google/devtools/build/lib/rules/cpp/CppOptions.java
index 0db208b..fa8787a 100644
--- a/src/main/java/com/google/devtools/build/lib/rules/cpp/CppOptions.java
+++ b/src/main/java/com/google/devtools/build/lib/rules/cpp/CppOptions.java
@@ -25,6 +25,7 @@
 import com.google.devtools.build.lib.analysis.config.PerLabelOptions;
 import com.google.devtools.build.lib.cmdline.Label;
 import com.google.devtools.build.lib.cmdline.LabelSyntaxException;
+import com.google.devtools.build.lib.rules.cpp.CppConfiguration.DynamicMode;
 import com.google.devtools.build.lib.rules.cpp.CppConfiguration.LibcTop;
 import com.google.devtools.build.lib.rules.cpp.CppConfiguration.StripMode;
 import com.google.devtools.build.lib.util.OptionsUtils;
@@ -69,21 +70,11 @@
   }
 
   /**
-   * The same as DynamicMode, but on command-line we also allow AUTO.
+   * Converter for {@link DynamicMode}
    */
-  public enum DynamicModeFlag {
-    OFF,
-    DEFAULT,
-    FULLY,
-    AUTO
-  }
-
-  /**
-   * Converter for DynamicModeFlag
-   */
-  public static class DynamicModeConverter extends EnumConverter<DynamicModeFlag> {
+  public static class DynamicModeConverter extends EnumConverter<DynamicMode> {
     public DynamicModeConverter() {
-      super(DynamicModeFlag.class, "dynamic mode");
+      super(DynamicMode.class, "dynamic mode");
     }
   }
 
@@ -226,7 +217,7 @@
             + "will be linked dynamically. 'off' means that all libraries will be linked "
             + "in mostly static mode."
   )
-  public DynamicModeFlag dynamicMode;
+  public DynamicMode dynamicMode;
 
   @Option(
     name = "experimental_link_compile_output_separately",