Change the assertions defaults:
1. Assertions now default to on for all builds
2. If you want them disabled you must (a) --disable-assertions to configure
   or DISABLE_ASSERTIONS=1 to make.

llvm-svn: 27548
diff --git a/llvm/autoconf/configure.ac b/llvm/autoconf/configure.ac
index fee1c2c..9959c6e 100644
--- a/llvm/autoconf/configure.ac
+++ b/llvm/autoconf/configure.ac
@@ -193,12 +193,10 @@
 if test -d "CVS" -o -d "${srcdir}/CVS"; then
   cvsbuild="yes"
   optimize="no"
-  asserts="yes"
   AC_SUBST(CVSBUILD,[[CVSBUILD=1]])
 else
   cvsbuild="no"
   optimize="yes"
-  asserts="no"
 fi
 
 dnl===-----------------------------------------------------------------------===
@@ -218,11 +216,11 @@
 
 dnl --enable-assertions : check whether they want to turn on assertions or not:
 AC_ARG_ENABLE(assertions,AS_HELP_STRING(
-  [--enable-assertions,Compile with assertion checks enabled (default is NO)]),, enableval=$asserts)
-if test ${enableval} = "no" ; then
-  AC_SUBST(ENABLE_ASSERTIONS,[[]])
+  [--enable-assertions,Compile with assertion checks enabled (default is YES)]),, enableval="yes")
+if test ${enableval} = "yes" ; then
+  AC_SUBST(DISABLE_ASSERTIONS,[[]])
 else
-  AC_SUBST(ENABLE_ASSERTIONS,[[ENABLE_ASSERTIONS=1]])
+  AC_SUBST(DISABLE_ASSERTIONS,[[DISABLE_ASSERTIONS=1]])
 fi
 
 dnl --enable-debug-runtime : should runtime libraries have debug symbols?