+# full-header-path.m4 serial 1
+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,
+dnl with or without modifications, as long as this notice is preserved.
+
+dnl From Derek Price.
+
+# gl_FULL_HEADER_PATH(HEADER1 HEADER2 ...)
+# ----------------------------------------
+# Find the full path to a header file, when the #include_next directive
+# doesn't work and the header exists in the first place. If the header were
+# sys/inttypes.h (and it existed and #include_next didn't work), this macro
+# would define FULL_PATH_SYS_INTTYPES_H to the quoted full path to
+# sys/inttypes.h in config.h
+# (e.g. `#define FULL_PATH_SYS_INTTYPES_H "/usr/include/sys/inttypes.h"').
+AC_DEFUN([gl_FULL_HEADER_PATH],
+[AC_LANG_PREPROC_REQUIRE()dnl
+AC_REQUIRE([gl_INCLUDE_NEXT])dnl
+if test $gl_cv_have_include_next = no; then
+AC_FOREACH([gl_HEADER_NAME], [$1],
+ [AS_VAR_PUSHDEF([gl_full_header_path],
+ [gl_cv_full_path_]m4_quote(m4_defn([gl_HEADER_NAME])))dnl
+ AC_CACHE_CHECK([full path to <]m4_quote(m4_defn([gl_HEADER_NAME]))[>],
+ m4_quote(m4_defn([gl_full_header_path])),
+ [AS_VAR_PUSHDEF([ac_header_exists],
+ [ac_cv_header_]m4_quote(m4_defn([gl_HEADER_NAME])))dnl
+ AC_CHECK_HEADERS_ONCE(m4_quote(m4_defn([gl_HEADER_NAME])))dnl
+ if test AS_VAR_GET(ac_header_exists) = yes; then
+ AC_LANG_CONFTEST([AC_LANG_SOURCE([[#include <]]m4_dquote(m4_defn([gl_HEADER_NAME]))[[>]])])
+dnl eval is necessary to expand ac_cpp.
+dnl Ultrix and Pyramid sh refuse to redirect output of eval, so use subshell.
+ AS_VAR_SET(gl_full_header_path,
+[`(eval "$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;}'`])
+ fi
+ AS_VAR_POPDEF([ac_header_exists])dnl
+ ])dnl
+ AC_DEFINE_UNQUOTED([FULL_PATH_]m4_quote(translit(m4_defn([gl_HEADER_NAME]),
+ [-./abcdefghijklmnopqrstuvwxyz],
+ [___ABCDEFGHIJKLMNOPQRSTUVWXYZ])),
+ ["AS_VAR_GET(gl_full_header_path)"],
+ [Define this to the full path to <]m4_quote(m4_defn([gl_HEADER_NAME]))[>.])
+ AS_VAR_POPDEF([gl_full_header_path])dnl
+])dnl
+fi
+])# gl_FULL_HEADER_PATH