+ if test -n "$gl_cv_func_sigprocmask"; then
+ AC_DEFINE([HAVE_POSIX_SIGNALBLOCKING], 1,
+ [Define to 1 if you have the sigset_t type and the sigprocmask function.])
+ else
+ AC_LIBOBJ([sigprocmask])
+ gl_PREREQ_SIGPROCMASK
+ fi
+])
+
+# Prerequisites of lib/sigprocmask.h and lib/sigprocmask.c.
+AC_DEFUN([gl_PREREQ_SIGPROCMASK], [
+ AC_CHECK_TYPES([sigset_t],
+ [gl_cv_type_sigset_t=yes], [gl_cv_type_sigset_t=no],
+ [#include <signal.h>
+/* Mingw defines sigset_t not in <signal.h>, but in <sys/types.h>. */
+#include <sys/types.h>])
+ if test $gl_cv_type_sigset_t = yes; then
+ AC_DEFINE([HAVE_SIGSET_T], [1],
+ [Define to 1 if you lack the sigprocmask function but have the sigset_t type.])
+ fi
+ AC_CHECK_FUNCS_ONCE(raise)