- if test "$ftruncate_missing" = yes; then
- AC_CHECK_HEADERS(unistd.h)
- AC_MSG_CHECKING([fcntl emulation of ftruncate])
- AC_CACHE_VAL(fu_cv_sys_ftruncate_emulation,
- [AC_TRY_LINK([
-#include <sys/types.h>
-#include <fcntl.h>], [
-#if !defined(F_CHSIZE) && !defined(F_FREESP)
- chsize();
-#endif
- ],
- fu_cv_sys_ftruncate_emulation=yes,
- fu_cv_sys_ftruncate_emulation=no)])
- AC_MSG_RESULT($fu_cv_sys_ftruncate_emulation)
- if test $fu_cv_sys_ftruncate_emulation = yes; then
- LIBOBJS="$LIBOBJS ftruncate.$ac_objext"
- fi
+AC_DEFUN([gl_FUNC_FTRUNCATE],
+[
+ AC_REQUIRE([gl_UNISTD_H_DEFAULTS])
+ AC_CHECK_FUNCS_ONCE([ftruncate])
+ if test $ac_cv_func_ftruncate = no; then
+ HAVE_FTRUNCATE=0