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#serial 2
# See if we need to emulate a missing ftruncate function using fcntl.
AC_DEFUN(jm_FUNC_FTRUNCATE,
[
AC_CHECK_FUNCS(ftruncate, , [ftruncate_missing=yes])
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
AC_LIBOBJ(ftruncate)
fi
fi
])
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