3 files changed, 33 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/cpp/uchar-1.c b/gcc/testsuite/gcc.dg/cpp/uchar-1.c
new file mode 100644
index 00000000000..3483e328101
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/cpp/uchar-1.c
@@ -0,0 +1,8 @@
+/* Copyright (C) 2002 Free Software Foundation, Inc.  */
+
+/* { dg-do preprocess } */
+/* { dg-options "-funsigned-char -fsigned-char" } */
+
+#if defined (__CHAR_UNSIGNED__)
+# error __CHAR_UNSIGNED__ defined
+#endif
diff --git a/gcc/testsuite/gcc.dg/cpp/uchar-2.c b/gcc/testsuite/gcc.dg/cpp/uchar-2.c
new file mode 100644
index 00000000000..739573c1098
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/cpp/uchar-2.c
@@ -0,0 +1,8 @@
+/* Copyright (C) 2002 Free Software Foundation, Inc.  */
+
+/* { dg-do preprocess } */
+/* { dg-options "-funsigned-char -fsigned-char -traditional" } */
+
+#if defined (__CHAR_UNSIGNED__)
+# error __CHAR_UNSIGNED__ defined
+#endif
diff --git a/gcc/testsuite/gcc.dg/cpp/uchar-3.c b/gcc/testsuite/gcc.dg/cpp/uchar-3.c
new file mode 100644
index 00000000000..41b987f5cab
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/cpp/uchar-3.c
@@ -0,0 +1,17 @@
+/* Copyright (C) 2002 Free Software Foundation, Inc.  */
+
+/* { dg-do compile } */
+/* { dg-options "-funsigned-char -fpreprocessed" } */
+
+/* Source: Ziemowit Laski.  -fpreprocessed doesn't define macros, but
+   CPP would interpret charconsts based upon whether __CHAR_UNSIGNED__
+   was defined.  */
+
+int foo()
+{
+  char f = 0x83;
+  if (f == '\x83')		/* { dg-bogus "always false" } */
+    f = 0;
+
+  return 0;
+}