autoconf: Stop lying to me.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@121222 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/autoconf/configure.ac b/autoconf/configure.ac
index d186b0ea662e2900e634648e2940d54762cc669a..dc0a5903017727dc22a45a0c1273775d73f23f48 100644 (file)
--- a/autoconf/configure.ac
+++ b/autoconf/configure.ac
@@ -1156,10 +1156,10 @@ then
   AC_MSG_ERROR([gcc|icc required but not found])
 fi
 
-dnl Ensure that compilation tools are GCC; we use GCC specific extensions
+dnl Ensure that compilation tools are compatible with GCC extensions
 if test "$GXX" != "yes" && test "$IXX" != "yes"
 then
-  AC_MSG_ERROR([g++|icc required but not found])
+  AC_MSG_ERROR([g++|clang++|icc required but not found])
 fi
 
 dnl Verify that GCC is version 3.0 or higher