configure: define AS_VAR_COPY

inouekazu · Jul 31, 2017 · 4b3c4c7 · 4b3c4c7
1 parent ef4c3a1
commit 4b3c4c7
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/m4/ax_compat.m4 b/m4/ax_compat.m4
@@ -0,0 +1,4 @@
+# For compatibility with autoconf < 2.63b
+m4_ifndef([AS_VAR_COPY],
+  [AC_DEFUN([AS_VAR_COPY],
+     [AS_LITERAL_IF([$1[]$2], [$1=$$2], [eval $1=\$$2])])])