With the stdint module, Sun C 5.8 issued warnings like this:
"./stdint.h", line 46: warning: #include of /usr/include/... may be non-portable
I installed the following to suppress these bogus warnings:
2006-07-04 Paul Eggert <[EMAIL PROTECTED]>
* absolute-header.m4 (gl_ABSOLUTE_HEADER): Prepend three slashes
to the absolute name, not just one, to bypass Sun C 5.8's
"warning: #include of /usr/include/... may be non-portable".
--- m4/absolute-header.m4 4 Jul 2006 06:37:10 -0000 1.1
+++ m4/absolute-header.m4 4 Jul 2006 07:37:12 -0000
@@ -1,4 +1,4 @@
-# absolute-header.m4 serial 3
+# absolute-header.m4 serial 4
dnl Copyright (C) 2006 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
@@ -13,6 +13,8 @@ dnl From Derek Price.
# ABSOLUTE_SYS_INTTYPES_H to the `<>' quoted absolute name of sys/inttypes.h
# in config.h
# (e.g. `#define ABSOLUTE_SYS_INTTYPES_H <///usr/include/sys/inttypes.h>').
+# The three "///" are to pacify Sun C 5.8, which otherwise would say
+# "warning: #include of /usr/include/... may be non-portable".
AC_DEFUN([gl_ABSOLUTE_HEADER],
[AC_LANG_PREPROC_REQUIRE()dnl
AC_FOREACH([gl_HEADER_NAME], [$1],
@@ -29,13 +31,13 @@ dnl eval is necessary to expand ac_cpp.
dnl Ultrix and Pyramid sh refuse to redirect output of eval, so use subshell.
AS_VAR_SET(gl_absolute_header,
[`(eval "$ac_cpp conftest.$ac_ext") 2>&AS_MESSAGE_LOG_FD |
-sed -n
'\#/]m4_quote(m4_defn([gl_HEADER_NAME]))[#{s#.*"\(.*/]m4_quote(m4_defn([gl_HEADER_NAME]))[\)".*#\1#;p;q;}'`])
+sed -n
'\#/]m4_quote(m4_defn([gl_HEADER_NAME]))[#{s#.*"\(.*/]m4_quote(m4_defn([gl_HEADER_NAME]))[\)".*#\1#;s#^/[^/]#//&#;p;q;}'`])
fi
AS_VAR_POPDEF([ac_header_exists])dnl
])dnl
AC_DEFINE_UNQUOTED(AS_TR_CPP([ABSOLUTE_]m4_quote(m4_defn([gl_HEADER_NAME]))),
[<AS_VAR_GET(gl_absolute_header)>],
- [Define this to the absolute name of
<]m4_quote(m4_defn([gl_HEADER_NAME]))[>.])
+ [Define this to an absolute name of
<]m4_quote(m4_defn([gl_HEADER_NAME]))[>.])
AS_VAR_POPDEF([gl_absolute_header])dnl
])dnl
])# gl_ABSOLUTE_HEADER
