dnl AC_CHECK_UCONTEXT: Check whether ucontext are working
dnl Most of the code is stolen from the GNU pth autoconf macros by
-dnl Ralf S. Engelschall. As
+dnl Ralf S. Engelschall.
dnl # ``"Reuse an expert's code" is the right
dnl # advice for most people. But it's a useless
dnl # advice for the experts writing the code
dnl ## #endif
dnl ##
-AC_DEFUN(AC_CHECK_STACKGROWTH,[dnl
+AC_DEFUN([AC_CHECK_STACKGROWTH],[dnl
AC_MSG_CHECKING(for direction of stack growth)
AC_CACHE_VAL(ac_cv_check_stackgrowth, [
cross_compiling=no
dnl ## AC_CHECK_MCSC(<success-action>, <failure-action>)
dnl ##
-AC_DEFUN(AC_CHECK_MCSC, [
+AC_DEFUN([AC_CHECK_MCSC], [
AC_MSG_CHECKING(for usable SVR4/SUSv2 makecontext(2)/swapcontext(2))
AC_CACHE_VAL(ac_cv_check_mcsc, [
AC_TRY_RUN([
dnl ## xxx.sp_size = <macro-size>(skaddr, sksize);
dnl ##
-AC_DEFUN(AC_CHECK_STACKSETUP,[dnl
+AC_DEFUN([AC_CHECK_STACKSETUP],[dnl
dnl # check for consistent usage
ifelse($1,[sigstack],,[
ifelse($1,[sigaltstack],,[