Bug 296426 - nsIXULRuntime should provide build config info, r=darin a=asa

toolkit/xre/Makefile.in

@@ -180,7 +180,10 @@ endif
 
 DEFINES += -DOS_TARGET=\"$(OS_TARGET)\"
 ifdef TARGET_XPCOM_ABI
-DEFINES += -DTARGET_OS_ABI=\"$(OS_TARGET)_$(TARGET_XPCOM_ABI)\"
+DEFINES += \
+	-DTARGET_XPCOM_ABI=\"$(TARGET_XPCOM_ABI)\" \
+	-DTARGET_OS_ABI=\"$(OS_TARGET)_$(TARGET_XPCOM_ABI)\" \
+	$(NULL)
 endif
 
 export:: $(addprefix $(topsrcdir)/xpfe/bootstrap/, $(SHAREDCPPSRCS) $(SHAREDCMMSRCS)) $(STACKWALK_CPPSRCS)

toolkit/xre/nsAppRunner.cpp

@@ -461,6 +461,24 @@ nsXULAppInfo::GetInSafeMode(PRBool *aResult)
   return NS_OK;
 }
 
+NS_IMETHODIMP
+nsXULAppInfo::GetOS(nsACString& aResult)
+{
+  aResult.AssignLiteral(OS_TARGET);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsXULAppInfo::GetXPCOMABI(nsACString& aResult)
+{
+#ifdef TARGET_XPCOM_ABI
+  aResult.AssignLiteral(TARGET_XPCOM_ABI);
+  return NS_OK;
+#else
+  return NS_ERROR_NOT_AVAILABLE;
+#endif
+}
+
 NS_IMETHODIMP
 nsXULAppInfo::CreateInstance(nsISupports* aOuter,
                              REFNSIID aIID,

toolkit/xre/nsIXULRuntime.idl

@@ -44,7 +44,7 @@
  *                    stable/frozen, please contact Benjamin Smedberg.
  */
 
-[scriptable, uuid(B344A346-D2BF-11D9-A33B-001124787B2E)]
+[scriptable, uuid(2848AB92-D912-11D9-89F7-001124787B2E)]
 interface nsIXULRuntime : nsISupports
 {
   /**
@@ -58,4 +58,26 @@ interface nsIXULRuntime : nsISupports
    * proper UI, it should set this flag to "true".
    */
   attribute boolean logConsoleErrors;
+
+  /**
+   * A string tag identifying the current operating system. This is taken
+   * from the OS_TARGET configure variable. It will always be available.
+   */
+  readonly attribute AUTF8String OS;
+
+  /**
+   * A string tag identifying the binary ABI of the current processor and
+   * compiler vtable. This is taken from the TARGET_XPCOM_ABI configure
+   * variable. It may not be available on all platforms, especially
+   * unusual processor or compiler combinations.
+   *
+   * The result takes the form <processor>-<compilerABI>, for example:
+   *   x86-msvc
+   *   ppc-gcc3
+   *
+   * This value should almost always be used in combination with "OS".
+   *
+   * @throw NS_ERROR_NOT_AVAILABLE if not available.
+   */
+  readonly attribute AUTF8String XPCOMABI;
 };