1 files changed, 29 insertions, 0 deletions
diff --git a/m4/macros/expand_run_string.m4 b/m4/macros/expand_run_string.m4
new file mode 100644
index 000000000000..2cb964e11f91
--- /dev/null
+++ b/m4/macros/expand_run_string.m4
@@ -0,0 +1,29 @@
+dnl ######################################################################
+dnl Run a program and print its output as a string
+dnl Takes: (header, code-to-run, [action-if-found, [action-if-not-found]])
+AC_DEFUN([AMU_EXPAND_RUN_STRING],
+[
+value="notfound"
+AC_TRY_RUN(
+[
+$1
+main(argc)
+int argc;
+{
+$2
+exit(0);
+}],
+[
+value=`./conftest dummy 2>>config.log`
+test -z "$value" && value="notfound"
+], value="notfound", value="notfound")
+if test "$value" = notfound
+then
+  :
+  $4
+else
+  :
+  $3
+fi
+])
+dnl ======================================================================