AC_C_CHAR_UNSIGNED for aix

git-svn-id: svn://tug.org/texlive/trunk@23095 c570f23f-e606-0410-a88d-b1316a301751

4 files changed, 44 insertions, 0 deletions

diff --git a/Build/source/texk/web2c/ChangeLog b/Build/source/texk/web2c/ChangeLog
index 897d62f9762..80edd9a0498 100644
--- a/Build/source/texk/web2c/ChangeLog
+++ b/Build/source/texk/web2c/ChangeLog
@@ -1,3 +1,9 @@
+2011-06-23  Karl Berry  <karl@tug.org>
+
+	* configure.ac (AC_C_CHAR_UNSIGNED): needed for test
+	in web2c/w2c/config.h, else AIX ends up mis-tangling tex.web.
+	tlbuild mail from vvv, 21 Jun 2011 23:57:53.
+
 2011-06-06  Karl Berry  <karl@tug.org>
 
 	* doc/web2c.texi: update MetaPost description, .mem's are
diff --git a/Build/source/texk/web2c/c-auto.in b/Build/source/texk/web2c/c-auto.in
index bbe8b558f28..ab57e65e0b1 100644
--- a/Build/source/texk/web2c/c-auto.in
+++ b/Build/source/texk/web2c/c-auto.in
@@ -334,6 +334,11 @@
 /* Define for large files, on AIX-style hosts. */
 #undef _LARGE_FILES
 
+/* Define to 1 if type `char' is unsigned and you are not using gcc.  */
+#ifndef __CHAR_UNSIGNED__
+# undef __CHAR_UNSIGNED__
+#endif
+
 /* Define to empty if `const' does not conform to ANSI C. */
 #undef const
 
diff --git a/Build/source/texk/web2c/configure b/Build/source/texk/web2c/configure
index 39f01c3046b..a5cb65b4896 100755
--- a/Build/source/texk/web2c/configure
+++ b/Build/source/texk/web2c/configure
@@ -19574,6 +19574,38 @@ fi
 
 fi
 
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether char is unsigned" >&5
+$as_echo_n "checking whether char is unsigned... " >&6; }
+if ${ac_cv_c_char_unsigned+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+$ac_includes_default
+int
+main ()
+{
+static int test_array [1 - 2 * !(((char) -1) < 0)];
+test_array [0] = 0
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+  ac_cv_c_char_unsigned=no
+else
+  ac_cv_c_char_unsigned=yes
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_c_char_unsigned" >&5
+$as_echo "$ac_cv_c_char_unsigned" >&6; }
+if test $ac_cv_c_char_unsigned = yes && test "$GCC" != yes; then
+  $as_echo "#define __CHAR_UNSIGNED__ 1" >>confdefs.h
+
+fi
+
 # The cast to long int works around a bug in the HP C Compiler
 # version HP92453-01 B.11.11.23709.GP, which incorrectly rejects
 # declarations like `int a3[[(sizeof (unsigned char)) >= 0]];'.
diff --git a/Build/source/texk/web2c/configure.ac b/Build/source/texk/web2c/configure.ac
index 71d9d8647e6..aaf79e4b6e1 100644
--- a/Build/source/texk/web2c/configure.ac
+++ b/Build/source/texk/web2c/configure.ac
@@ -231,6 +231,7 @@ if test `(uname) 2>/dev/null` = aux; then
   AC_CHECK_LIB([posix], [sigemptyset])
 fi
 
+AC_C_CHAR_UNSIGNED
 AC_CHECK_SIZEOF([int])
 if test $ac_cv_sizeof_int -lt 4; then
   AC_MSG_ERROR([Sorry, need `int' with at least 4 bytes.])