From: Richard M. Stallman <rms@gnu.org>
Date: Tue, 10 May 1994 20:11:32 +0000 (+0000)
Subject: (using NON_GNU_CPP): Fix test for CPP already set.
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(using NON_GNU_CPP): Fix test for CPP already set.
---

diff --git a/configure1.in b/configure1.in
index 0e59358a6d5..90c21084b4f 100755
--- a/configure1.in
+++ b/configure1.in
@@ -1109,7 +1109,7 @@ esac
 #### Some systems specify a CPP to use unless we are using GCC.
 #### Now that we know whether we are using GCC, we can decide whether
 #### to use that one.
-if [ "x$NON_GNU_CPP" = x ] || [ x$GCC = x1 ] || [ "x$CPP" = x ]
+if [ "x$NON_GNU_CPP" = x ] || [ x$GCC = x1 ] || [ "x$CPP" != x ]
 then true
 else
   CPP="$NON_GNU_CPP"