* cpperror.c (cpp_error): For traditional CPP, default to

	diagnostics on pfile->line.
	* cpplib.c (prepare_directive_trad): Set line number for
	diagnostics for #define too.
	* cpptrad.c (skip_whitespace): Skip comments properly.
	(_cpp_expansions_different_trad): Initialize quote2.
testsuite:
	* gcc.dg/cpp/trad: New directory with traditional tests copied
	from parent directory.
	* gcc.dg/cpp/assert_trad1.c, gcc.dg/cpp/assert_trad2.c,
	gcc.dg/cpp/assert_trad3.c, gcc.dg/cpp/defined_trad.c,
	gcc.dg/cpp/hash2.c, gcc.dg/cpp/tr-define.c, gcc.dg/cpp/tr-direct.c,
	gcc.dg/cpp/tr-sign.c, gcc.dg/cpp/tr-str.c, gcc.dg/cpp/uchar-2.c:
	Move to trad/ and rename.
	* gcc.dg/cpp/trad/__STDC__.c, gcc.dg/cpp/trad/comment.c,
	gcc.dg/cpp/trad/escaped-eof.c, gcc.dg/cpp/trad/redef1.c,
	gcc.dg/cpp/trad/redef2.c: New tests.
	* gcc.dg/cpp/trad/trad.exp: New driver.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@54870 138bc75d-0d04-0410-961f-82ee72b054a4

22 files changed, 407 insertions, 6 deletions

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index c037fcbcac8..670e0f8ad36 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,12 @@
+2002-06-21  Neil Booth  <neil@daikokuya.co.uk>
+
+	* cpperror.c (cpp_error): For traditional CPP, default to
+	diagnostics on pfile->line.
+	* cpplib.c (prepare_directive_trad): Set line number for
+	diagnostics for #define too.
+	* cpptrad.c (skip_whitespace): Skip comments properly.
+	(_cpp_expansions_different_trad): Initialize quote2.
+
 2002-06-21  Hans-Peter Nilsson  <hp@bitrange.com>
 
 	* config/mmix/mmix.md: Change GNU CC to GCC in file header comment.
diff --git a/gcc/cpperror.c b/gcc/cpperror.c
index 6603a20710c..0e3b0b631f0 100644
--- a/gcc/cpperror.c
+++ b/gcc/cpperror.c
@@ -137,8 +137,16 @@ cpp_error VPARAMS ((cpp_reader * pfile, int level, const char *msgid, ...))
 
   if (pfile->buffer)
     {
-      line = pfile->cur_token[-1].line;
-      column = pfile->cur_token[-1].col;
+      if (CPP_OPTION (pfile, traditional))
+	{
+	  line = pfile->line;
+	  column = 0;
+	}
+      else
+	{
+	  line = pfile->cur_token[-1].line;
+	  column = pfile->cur_token[-1].col;
+	}
     }
   else
     line = column = 0;
diff --git a/gcc/cpplib.c b/gcc/cpplib.c
index d3c95e75c86..59e2fe6709a 100644
--- a/gcc/cpplib.c
+++ b/gcc/cpplib.c
@@ -303,10 +303,11 @@ prepare_directive_trad (pfile)
       pfile->state.skipping = was_skipping;
       _cpp_overlay_buffer (pfile, pfile->out.base,
 			   pfile->out.cur - pfile->out.base);
-      /* Report diagnostics on the line of the directive.  */
-      pfile->line = pfile->directive_line;
     }
 
+  /* Report diagnostics on the line of the directive.  */
+  pfile->line = pfile->directive_line;
+
   /* Stop ISO C from expanding anything.  */
   pfile->state.prevent_expansion++;
 }
diff --git a/gcc/cpptrad.c b/gcc/cpptrad.c
index 74976dbe231..b3413d031f0 100644
--- a/gcc/cpptrad.c
+++ b/gcc/cpptrad.c
@@ -266,7 +266,7 @@ skip_whitespace (pfile, cur, skip_comments)
       if (!c && cur - 1 != RLIMIT (pfile->context))
 	continue;
 
-      if (*cur == '/' && skip_comments)
+      if (c == '/' && skip_comments)
 	{
 	  const uchar *tmp = skip_escaped_newlines (pfile, cur);
 	  if (*tmp == '*')
@@ -1118,7 +1118,7 @@ _cpp_expansions_different_trad (macro1, macro2)
 {
   uchar *p1 = xmalloc (macro1->count + macro2->count);
   uchar *p2 = p1 + macro1->count;
-  uchar quote1 = 0, quote2;
+  uchar quote1 = 0, quote2 = 0;
   bool mismatch;
   size_t len1, len2;
 
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 498e67171a5..75b2189769a 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,17 @@
+2002-06-21  Neil Booth  <neil@daikokuya.co.uk>
+
+	* gcc.dg/cpp/trad: New directory with traditional tests copied
+	from parent directory.
+	* gcc.dg/cpp/assert_trad1.c, gcc.dg/cpp/assert_trad2.c,
+	gcc.dg/cpp/assert_trad3.c, gcc.dg/cpp/defined_trad.c,
+	gcc.dg/cpp/hash2.c, gcc.dg/cpp/tr-define.c, gcc.dg/cpp/tr-direct.c,
+	gcc.dg/cpp/tr-sign.c, gcc.dg/cpp/tr-str.c, gcc.dg/cpp/uchar-2.c:
+	Move to trad/ and rename.
+	* gcc.dg/cpp/trad/__STDC__.c, gcc.dg/cpp/trad/comment.c,
+	gcc.dg/cpp/trad/escaped-eof.c, gcc.dg/cpp/trad/redef1.c,
+	gcc.dg/cpp/trad/redef2.c: New tests.
+	* gcc.dg/cpp/trad/trad.exp: New driver.
+
 2002-06-20  Neil Booth  <neil@daikokuya.co.uk>
 
 	* gcc.dg/cpp/assert_trad1.c, gcc.dg/cpp/assert_trad2.c,
diff --git a/gcc/testsuite/gcc.dg/cpp/trad/__STDC__.c b/gcc/testsuite/gcc.dg/cpp/trad/__STDC__.c
new file mode 100644
index 00000000000..b25bcb9aa76
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/cpp/trad/__STDC__.c
@@ -0,0 +1,7 @@
+/* Test that __STDC__ is not defined.  */
+
+/* { dg-do preprocess } */
+
+#if defined __STDC__
+# error __STDC__ defined /* { dg-bogus "__STDC__" "__STDC__ defined" } */
+#endif
diff --git a/gcc/testsuite/gcc.dg/cpp/trad/assert1.c b/gcc/testsuite/gcc.dg/cpp/trad/assert1.c
new file mode 100644
index 00000000000..ff7cc620bec
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/cpp/trad/assert1.c
@@ -0,0 +1,46 @@
+/* Basic tests of the #assert preprocessor extension. */
+/* { dg-do compile } */
+/* { dg-options "" } */
+
+#define def unused expansion
+#define fail  int fail
+
+#assert abc (def)
+#assert abc (ghi)
+#assert abc (jkl)
+#assert space ( s p a c e )
+
+/* Basic: */
+#if !#abc (def) || !#abc (ghi) || !#abc (jkl)
+fail
+#endif
+
+/* any answer for #abc */
+#if !#abc
+fail
+#endif
+
+/* internal whitespace is collapsed,
+   external whitespace is deleted  */
+#if !#space (s p  a  c e) || !#space (  s p a c e  ) || #space (space)
+fail
+#endif
+
+/* removing assertions */
+#unassert abc (jkl)
+#if !#abc || !#abc (def) || !#abc (ghi) || #abc (jkl)
+fail
+#endif
+
+#unassert abc
+#if #abc || #abc (def) || #abc (ghi) || #abc (jkl)
+fail
+#endif
+
+int gobble
+
+/* make sure it can succeed too.
+   also check space before open paren isn't significant */
+#if #space(s p a c e)
+;
+#endif
diff --git a/gcc/testsuite/gcc.dg/cpp/trad/assert2.c b/gcc/testsuite/gcc.dg/cpp/trad/assert2.c
new file mode 100644
index 00000000000..9838e149cbf
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/cpp/trad/assert2.c
@@ -0,0 +1,23 @@
+/* Malformed assertion tests.  */
+/* { dg-do preprocess } */
+
+#assert		/* { dg-error "without predicate" "assert w/o predicate" } */
+#assert %	/* { dg-error "an identifier" "assert punctuation" } */
+#assert 12	/* { dg-error "an identifier" "assert number" } */
+#assert abc	/* { dg-error "missing" "assert w/o answer" } */
+
+#if #		/* { dg-error "without predicate" "test w/o predicate" } */
+#endif
+
+#if #%		/* { dg-error "an identifier" "test punctuation" } */
+#endif
+
+#if #12		/* { dg-error "an identifier" "test number" } */
+#endif
+
+#if #abc
+#error		/* { dg-bogus "error" "test w/o answer" } */
+#endif
+
+#if #abc[def]	/* { dg-error "not valid in" "bad syntax" } */
+#endif
diff --git a/gcc/testsuite/gcc.dg/cpp/trad/assert3.c b/gcc/testsuite/gcc.dg/cpp/trad/assert3.c
new file mode 100644
index 00000000000..df9b19fdaf9
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/cpp/trad/assert3.c
@@ -0,0 +1,10 @@
+/* Copyright (C) 2000 Free Software Foundation, Inc.  */
+
+/* { dg-do preprocess } */
+/* { dg-options "-A abc=def -A abc\(ghi\) \"-Aabc = jkl\" -A abc=mno -A -abc=mno" } */
+
+/* Test -A command line syntax.  Source Neil Booth.  31 Oct 2000.  */
+
+#if !#abc (def) || !#abc (ghi) || !#abc (jkl) || #abc(mno)
+#error Command line -A assertions
+#endif
diff --git a/gcc/testsuite/gcc.dg/cpp/trad/comment.c b/gcc/testsuite/gcc.dg/cpp/trad/comment.c
new file mode 100644
index 00000000000..ce9d7f18e1c
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/cpp/trad/comment.c
@@ -0,0 +1,5 @@
+/* Test for warning of unterminated comment.  */
+
+/* { dg-do preprocess } */
+
+/* { dg-warning "unterminated comment" }
diff --git a/gcc/testsuite/gcc.dg/cpp/trad/define.c b/gcc/testsuite/gcc.dg/cpp/trad/define.c
new file mode 100644
index 00000000000..d83288df23e
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/cpp/trad/define.c
@@ -0,0 +1,2 @@
+/* { dg-do preprocess } */
+/* { dg-options "-traditional-cpp -DDEFINE1DEFINE -DDEFINE2DEFIN=" } */
diff --git a/gcc/testsuite/gcc.dg/cpp/trad/defined.c b/gcc/testsuite/gcc.dg/cpp/trad/defined.c
new file mode 100644
index 00000000000..a24ecd519ea
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/cpp/trad/defined.c
@@ -0,0 +1,78 @@
+/* Copyright (C) 2000 Free Software Foundation, Inc.  */
+
+/* { dg-do preprocess } */
+
+/* Tests tradcpp0 with defined.  The defined operator in traditional C
+   works just the same as the defined operator in Standard C.  */
+
+/* Source: Zack Weinberg, glibc, Neil Booth 11 Dec 2000.  */
+
+#if defined REGPARMS
+#error REGPARMS should not be defined
+#endif
+
+#define REGPARMS 1
+#if !defined REGPARMS
+#error REGPARMS should be defined
+#endif
+
+#define defined			/* { dg-error "defined" } */
+
+/* No diagnostics, though you could argue there should be.  */
+#if defined defined
+#error defined is defined!
+#endif
+
+#define is_Z_defined defined Z
+
+#if defined Z
+#error Z is not defined
+#endif
+
+/* The behaviour of "defined" when it comes from a macro expansion is
+   now documented.  */
+#if is_Z_defined
+#error Macro expanding into defined operator test 1
+#endif
+
+#define Z
+
+#if !defined Z
+#error Z is defined
+#endif
+
+#if !is_Z_defined
+#error Macro expanding into defined operator test 2
+#endif
+
+#undef is_Z_defined
+#undef Z
+
+/* Do all the tests over again with the () form of defined.  */
+
+/* No diagnostics, though you could argue there should be.  */
+#if defined(defined)
+#error defined is defined!
+#endif
+
+#define is_Z_defined defined ( Z )
+
+#if defined(Z)
+#error Z is not defined
+#endif
+
+/* The behaviour of "defined" when it comes from a macro expansion is
+   now documented.  */
+#if is_Z_defined
+#error Macro expanding into defined operator test 1
+#endif
+
+#define Z
+
+#if !defined(Z)
+#error Z is defined
+#endif
+
+#if !is_Z_defined
+#error Macro expanding into defined operator test 2
+#endif
diff --git a/gcc/testsuite/gcc.dg/cpp/trad/directive.c b/gcc/testsuite/gcc.dg/cpp/trad/directive.c
new file mode 100644
index 00000000000..186cb30bbed
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/cpp/trad/directive.c
@@ -0,0 +1,10 @@
+/* Test for some basic aspects of -traditional directive processing.  */
+
+/* { dg-do preprocess } */
+
+/* There is a #error directive.  */
+
+#error bad	/* { dg-error "bad" } */
+
+/* Directives with their #s indented are not recognized.  */
+ #if 0	/* { dg-bogus "unterminated" } */
diff --git a/gcc/testsuite/gcc.dg/cpp/trad/escaped-eof.c b/gcc/testsuite/gcc.dg/cpp/trad/escaped-eof.c
new file mode 100644
index 00000000000..37ca95c6918
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/cpp/trad/escaped-eof.c
@@ -0,0 +1,6 @@
+/* Test for warning of escaped EOF.  */
+
+/* { dg-do preprocess } */
+
+/* { dg-warning "backslash-new" "escaped EOF warning" { target *-*-* } 7 } */
+\
diff --git a/gcc/testsuite/gcc.dg/cpp/trad/hash.c b/gcc/testsuite/gcc.dg/cpp/trad/hash.c
new file mode 100644
index 00000000000..8108c89fbfc
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/cpp/trad/hash.c
@@ -0,0 +1,14 @@
+/* Test for erroneously thinking comments are token-pastes.
+   From XFree86 4.0.  */
+/* { dg-do preprocess } */
+
+#ifndef foo
+#define foo	/**/
+#endif
+
+#ifndef foo
+#define foo	/* as nothing */
+#endif
+
+/* { dg-bogus "(start|end) of macro" "paste at end" { target *-*-* } 7 } */
+/* { dg-bogus "(start|end) of macro" "comment at end" { target *-*-* } 11 } */
diff --git a/gcc/testsuite/gcc.dg/cpp/trad/num-sign.c b/gcc/testsuite/gcc.dg/cpp/trad/num-sign.c
new file mode 100644
index 00000000000..7522bbf41e2
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/cpp/trad/num-sign.c
@@ -0,0 +1,16 @@
+/* Copyright (C) 2001 Free Software Foundation, Inc.  */
+
+/* { dg-do preprocess { target i?86-*-* } } */
+
+/* Tests that traditional numbers are signed, unless otherwise
+   specified.  This test assumes a 32 bit target.
+
+   Neil Booth, 5 Aug 2001.  Inspired by PR 3824.  */
+
+#if 0xffffffffffffffff >= 0
+# error	0xffffffffffffffff /* { dg-bogus "0xffffffffffffffff" "0xffffffffffffffff positive" } */
+#endif
+
+#if 0xffffffffffffffffU <= 0
+# error	0xffffffffffffffffU	/* { dg-bogus "0xffffffffffffffffU" "0xffffffffffffffffU negative" } */
+#endif
diff --git a/gcc/testsuite/gcc.dg/cpp/trad/paste.c b/gcc/testsuite/gcc.dg/cpp/trad/paste.c
new file mode 100644
index 00000000000..9f1c0db3291
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/cpp/trad/paste.c
@@ -0,0 +1,16 @@
+/* Test for proper comment elimination semantics from cpplib's -traditional.
+   This should compile and link with compiled with `gcc -traditional-cpp'.
+   Test case by Jason R. Thorpe <thorpej@zembu.com>.  */
+
+/* { dg-do compile } */
+
+#define A(name) X/**/name
+
+#define B(name) \
+void A(Y/**/name)() { A(name)(); }
+
+void Xhello() { printf("hello world\n"); }
+
+B(hello)
+
+int main() { XYhello(); return (0); }
diff --git a/gcc/testsuite/gcc.dg/cpp/trad/redef1.c b/gcc/testsuite/gcc.dg/cpp/trad/redef1.c
new file mode 100644
index 00000000000..ce5dde0bb37
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/cpp/trad/redef1.c
@@ -0,0 +1,36 @@
+/* Test for redefining traditional macros with insignificant
+   (i.e. whitespace) differences.  */
+
+/* { dg-do preprocess } */
+
+
+#define foo bar
+#define /* x */ foo /* x */ bar /* x */
+
+#define quux(thud) a one and a thud and a two
+#define /**/ quux( thud ) /**/ a one and a /**/ thud /**/ and /**/ a two
+#define quux(thud) a one	and a thud and a 	two /* bah */
+
+#define f(x, y)x "x  y z"  y
+#define f(x, y) x  "x  y z" y
+
+#define baz() whiz bang
+#define baz() whiz  bang
+
+#define g foo
+#undef g
+#define g
+
+/* { dg-bogus "redefined" "foo redefined"	{ target *-*-* } 8 } */
+/* { dg-bogus "redefined" "quux redefined"	{ target *-*-* } 11 } */
+/* { dg-bogus "redefined" "quux redefined"	{ target *-*-* } 12 } */
+/* { dg-bogus "redefined" "f redefined"		{ target *-*-* } 15 } */
+/* { dg-bogus "redefined" "baz redefined"	{ target *-*-* } 18 } */
+/* { dg-bogus "redefined" "g redefined"		{ target *-*-* } 22 } */
+
+/* { dg-bogus "previous def" "foo prev def"	{ target *-*-* } 7 } */
+/* { dg-bogus "previous def" "quux prev def"	{ target *-*-* } 10 } */
+/* { dg-bogus "previous def" "quux prev def"	{ target *-*-* } 11 } */
+/* { dg-bogus "previous def" "f prev def"	{ target *-*-* } 14 } */
+/* { dg-bogus "previous def" "baz prev def"	{ target *-*-* } 17 } */
+/* { dg-bogus "previous def" "g prev def"	{ target *-*-* } 20 } */
diff --git a/gcc/testsuite/gcc.dg/cpp/trad/redef2.c b/gcc/testsuite/gcc.dg/cpp/trad/redef2.c
new file mode 100644
index 00000000000..269a846266f
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/cpp/trad/redef2.c
@@ -0,0 +1,32 @@
+/* Test for redefining traditional macros with significant differences.  */
+
+/* { dg-do preprocess } */
+
+#define foo bar    /* { dg-warning "previous def" "foo prev def" } */
+#define foo barr   /* { dg-warning "redefined" "foo redefined" } */
+
+#undef foo
+#define foo bar    /* { dg-warning "previous def" "foo prev def 2" } */
+#define foo() bar    /* { dg-warning "redefined" "foo redefined 2" } */
+
+#undef foo
+#define foo() bar    /* { dg-warning "previous def" "foo prev def" } */
+#define foo() barr   /* { dg-warning "redefined" "foo redefined" } */
+
+#define quux(thud) a thud b /* { dg-warning "previous def" "quux prev def" } */
+#define quux(thu) a thud b   /* { dg-warning "redefined" "quux redefined" } */
+
+#define bar(x, y) x+y /* { dg-warning "previous def" "bar prev def" } */
+#define bar(x, y) x+x   /* { dg-warning "redefined" "bar redefined" } */
+
+#define bat(x, y) x+y  /* { dg-warning "previous def" "bat prev def" } */
+#define bat(x, y) x+ y   /* { dg-warning "redefined" "bat redefined" } */
+
+#define baz(x, y) x+y  /* { dg-warning "previous def" "baz prev def" } */
+#define baz(x, y) x +y   /* { dg-warning "redefined" "baz redefined" } */
+
+#define f(x, y) "x y"  /* { dg-warning "previous def" "f prev def" } */
+#define f(x, y) "x  y"   /* { dg-warning "redefined" "f redefined" } */
+
+#define g(x, y) 'x'  /* { dg-warning "previous def" "g prev def" } */
+#define g(x, y) ' x'   /* { dg-warning "redefined" "g redefined" } */
diff --git a/gcc/testsuite/gcc.dg/cpp/trad/strify.c b/gcc/testsuite/gcc.dg/cpp/trad/strify.c
new file mode 100644
index 00000000000..500ef1ea32f
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/cpp/trad/strify.c
@@ -0,0 +1,17 @@
+/* Test whether traditional stringify works.  */
+/* { dg-do run } */
+
+#define foo(a, b) c="a"; d="b";
+
+extern void abort ();
+
+int main ()
+{
+  char *c, *d;
+
+  foo (p,q);
+  if (c[0] != 'p' || d[0] != 'q')
+    abort ();
+
+  exit (0);
+}
diff --git a/gcc/testsuite/gcc.dg/cpp/trad/trad.exp b/gcc/testsuite/gcc.dg/cpp/trad/trad.exp
new file mode 100644
index 00000000000..60d90023007
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/cpp/trad/trad.exp
@@ -0,0 +1,43 @@
+#   Copyright (C) 1997, 2000 Free Software Foundation, Inc.
+
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+# 
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+# 
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  
+
+# GCC testsuite that uses the `dg.exp' driver.
+
+# There's a bunch of headers we need.
+if [is_remote host] {
+    foreach header [glob -nocomplain $srcdir/$subdir/*.{h,def} ] {
+	remote_download host $header
+    }
+}
+
+# Load support procs.
+load_lib gcc-dg.exp
+
+# If a testcase doesn't have special options, use these.
+global DEFAULT_TRADCPPFLAGS
+if ![info exists DEFAULT_TRADCPPFLAGS] then {
+    set DEFAULT_TRADCPPFLAGS " -traditional-cpp"
+}
+
+# Initialize `dg'.
+dg-init
+
+# Main loop.
+dg-runtest [lsort [glob -nocomplain $srcdir/$subdir/*.\[cS\]]] \
+	"" $DEFAULT_TRADCPPFLAGS
+
+# All done.
+dg-finish
diff --git a/gcc/testsuite/gcc.dg/cpp/trad/uchar.c b/gcc/testsuite/gcc.dg/cpp/trad/uchar.c
new file mode 100644
index 00000000000..8ea54a1f43c
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/cpp/trad/uchar.c
@@ -0,0 +1,8 @@
+/* Copyright (C) 2002 Free Software Foundation, Inc.  */
+
+/* { dg-do preprocess } */
+/* { dg-options "-funsigned-char -fsigned-char -traditional-cpp" } */
+
+#if defined (__CHAR_UNSIGNED__)
+# error __CHAR_UNSIGNED__ defined
+#endif