iscc: use cloog_union_domain_from_isl_set
[barvinok.git] / m4 / absolute-header.m4
blob5b7a2fc35f08d6bddc2f58eb0a1f887c2f8364a7
1 # absolute-header.m4 serial 7
2 dnl Copyright (C) 2006, 2007 Free Software Foundation, Inc.
3 dnl This file is free software; the Free Software Foundation
4 dnl gives unlimited permission to copy and/or distribute it,
5 dnl with or without modifications, as long as this notice is preserved.
7 dnl From Derek Price.
9 # gl_ABSOLUTE_HEADER(HEADER1 HEADER2 ...)
10 # ---------------------------------------
11 # Find the absolute name of a header file, assuming the header exists.
12 # If the header were sys/inttypes.h, this macro would define
13 # ABSOLUTE_SYS_INTTYPES_H to the `""' quoted absolute name of sys/inttypes.h
14 # in config.h
15 # (e.g. `#define ABSOLUTE_SYS_INTTYPES_H "///usr/include/sys/inttypes.h"').
16 # The three "///" are to pacify Sun C 5.8, which otherwise would say
17 # "warning: #include of /usr/include/... may be non-portable".
18 # Use `""', not `<>', so that the /// cannot be confused with a C99 comment.
19 AC_DEFUN([gl_ABSOLUTE_HEADER],
20 [AC_LANG_PREPROC_REQUIRE()dnl
21 AC_FOREACH([gl_HEADER_NAME], [$1],
22   [AS_VAR_PUSHDEF([gl_absolute_header],
23                   [gl_cv_absolute_]m4_quote(m4_defn([gl_HEADER_NAME])))dnl
24   AC_CACHE_CHECK([absolute name of <]m4_quote(m4_defn([gl_HEADER_NAME]))[>],
25     m4_quote(m4_defn([gl_absolute_header])),
26     [AS_VAR_PUSHDEF([ac_header_exists],
27                     [ac_cv_header_]m4_quote(m4_defn([gl_HEADER_NAME])))dnl
28     AC_CHECK_HEADERS_ONCE(m4_quote(m4_defn([gl_HEADER_NAME])))dnl
29     if test AS_VAR_GET(ac_header_exists) = yes; then
30       AC_LANG_CONFTEST([AC_LANG_SOURCE([[#include <]]m4_dquote(m4_defn([gl_HEADER_NAME]))[[>]])])
31 dnl eval is necessary to expand ac_cpp.
32 dnl Ultrix and Pyramid sh refuse to redirect output of eval, so use subshell.
33       AS_VAR_SET(gl_absolute_header,
34 [`(eval "$ac_cpp conftest.$ac_ext") 2>&AS_MESSAGE_LOG_FD |
35 sed -n '\#/]m4_quote(m4_defn([gl_HEADER_NAME]))[#{
36         s#.*"\(.*/]m4_quote(m4_defn([gl_HEADER_NAME]))[\)".*#\1#
37         s#^/[^/]#//&#
38         p
39         q
40 }'`])
41     fi
42     AS_VAR_POPDEF([ac_header_exists])dnl
43     ])dnl
44   AC_DEFINE_UNQUOTED(AS_TR_CPP([ABSOLUTE_]m4_quote(m4_defn([gl_HEADER_NAME]))),
45                      ["AS_VAR_GET(gl_absolute_header)"],
46                      [Define this to an absolute name of <]m4_quote(m4_defn([gl_HEADER_NAME]))[>.])
47   AS_VAR_POPDEF([gl_absolute_header])dnl
48 ])dnl
49 ])# gl_ABSOLUTE_HEADER