check for makecontextRELEASE-0_5_0-PRIVATEDANCERBRANCH-RELEASE-0_5_0

Original commit message from CVS:
check for makecontext

1 files changed, 34 insertions, 0 deletions

diff --git a/m4/gst-makecontext.m4 b/m4/gst-makecontext.m4
new file mode 100644
index 0000000..467aa13
--- /dev/null
+++ b/m4/gst-makecontext.m4
@@ -0,0 +1,34 @@
+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
+])