123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172 |
- dnl Copyright (C) 2003, 2007, 2009-2014 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.
- AC_DEFUN([gl_FUNC_READLINK],
- [
- AC_REQUIRE([gl_UNISTD_H_DEFAULTS])
- AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
- AC_CHECK_FUNCS_ONCE([readlink])
- if test $ac_cv_func_readlink = no; then
- HAVE_READLINK=0
- else
- AC_CACHE_CHECK([whether readlink signature is correct],
- [gl_cv_decl_readlink_works],
- [AC_COMPILE_IFELSE(
- [AC_LANG_PROGRAM(
- [[
-
- ssize_t readlink (const char *, char *, size_t);]])],
- [gl_cv_decl_readlink_works=yes], [gl_cv_decl_readlink_works=no])])
- dnl Solaris 9 ignores trailing slash.
- dnl FreeBSD 7.2 dereferences only one level of links with trailing slash.
- AC_CACHE_CHECK([whether readlink handles trailing slash correctly],
- [gl_cv_func_readlink_works],
- [
- ln -s conftest.no-such conftest.link
- ln -s conftest.link conftest.lnk2
- AC_RUN_IFELSE(
- [AC_LANG_PROGRAM(
- [[
- ]], [[char buf[20];
- return readlink ("conftest.lnk2/", buf, sizeof buf) != -1;]])],
- [gl_cv_func_readlink_works=yes], [gl_cv_func_readlink_works=no],
- [case "$host_os" in
-
- *-gnu*) gl_cv_func_readlink_works="guessing yes" ;;
-
- *) gl_cv_func_readlink_works="guessing no" ;;
- esac
- ])
- rm -f conftest.link conftest.lnk2])
- case "$gl_cv_func_readlink_works" in
- *yes)
- if test "$gl_cv_decl_readlink_works" != yes; then
- REPLACE_READLINK=1
- fi
- ;;
- *)
- AC_DEFINE([READLINK_TRAILING_SLASH_BUG], [1], [Define to 1 if readlink
- fails to recognize a trailing slash.])
- REPLACE_READLINK=1
- ;;
- esac
- fi
- ])
- AC_DEFUN([gl_FUNC_READLINK_SEPARATE],
- [
- AC_CHECK_FUNCS_ONCE([readlink])
- gl_PREREQ_READLINK
- ])
- AC_DEFUN([gl_PREREQ_READLINK],
- [
- :
- ])
|