- [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([#include <unistd.h>],
-[#if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__
-/* mingw mistakenly returns 0 when trying to seek on pipes. */
+ [if test $cross_compiling = no; then
+ AC_LINK_IFELSE([
+#include <sys/types.h> /* for off_t */
+#include <stdio.h> /* for SEEK_CUR */
+#include <unistd.h>
+int main ()
+{
+ /* Exit with success only if stdin is seekable. */
+ return lseek (0, (off_t)0, SEEK_CUR) < 0;
+}],
+ [if test -s conftest$ac_exeext \
+ && ./conftest$ac_exeext < conftest.$ac_ext \
+ && { echo hi | ./conftest$ac_exeext; test $? = 1; }; then
+ gl_cv_func_lseek_pipe=yes
+ else
+ gl_cv_func_lseek_pipe=no
+ fi],
+ [gl_cv_func_lseek_pipe=no])
+ else
+ AC_COMPILE_IFELSE([
+#if ((defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__) || defined __BEOS__
+/* mingw and BeOS mistakenly return 0 when trying to seek on pipes. */