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AC_DEFUN(GST_CHECK_MAKECONTEXT, [
AC_MSG_CHECKING([whether we have makecontext])
AC_TRY_RUN([
#include <ucontext.h>
#include <stdlib.h>
void test(void)
{
exit(0);
}
int main(int argc, char *argv[])
{
ucontext_t ucp;
int ret;
ret = getcontext(&ucp);
if(ret<0)exit(1);
ucp.uc_stack.ss_sp = malloc(65536);
ucp.uc_stack.ss_size = 65536;
makecontext(&ucp,test,0);
setcontext(&ucp);
exit(1);
}
], HAVE_MAKECONTEXT="yes", HAVE_MAKECONTEXT="no")
AC_MSG_RESULT($HAVE_MAKECONTEXT)
if test "$HAVE_MAKECONTEXT" == "yes"; then
AC_DEFINE_UNQUOTED(HAVE_MAKECONTEXT, $HAVE_MAKECONTEXT,
[defined if we have makecontext ()])
fi
])
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