# full-header-path.m4 serial 2 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, assuming the header exists. # If the header were sys/inttypes.h, 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 '). AC_DEFUN([gl_FULL_HEADER_PATH], [AC_LANG_PREPROC_REQUIRE()dnl 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(AS_TR_CPP([FULL_PATH_]m4_quote(m4_defn([gl_HEADER_NAME]))), [], [Define this to the full path to <]m4_quote(m4_defn([gl_HEADER_NAME]))[>.]) AS_VAR_POPDEF([gl_full_header_path])dnl ])dnl ])# gl_FULL_HEADER_PATH