Don't use bashism/kshism of test ==. From Kamil Rytarowski.
Differential Revision: http://reviews.llvm.org/D12642
llvm-svn: 247512
diff --git a/llvm/autoconf/configure.ac b/llvm/autoconf/configure.ac
index fb73e51..a3cb05c 100644
--- a/llvm/autoconf/configure.ac
+++ b/llvm/autoconf/configure.ac
@@ -74,7 +74,7 @@
fi
dnl Quit if it is an in-source build
-if test ${srcdir} == "." ; then
+if test ${srcdir} = "." ; then
AC_MSG_ERROR([In-source builds are not allowed. Please configure from a separate build directory!])
fi