Revert "Changed AC_LANG from PROGRAM to SOURCE to prevent double definition of main"

This reverts commit bb733f43.

Revert "Changed AC_LANG from PROGRAM to SOURCE to prevent double definition of main"
This reverts commit bb733f43.
2d14fafe · Orvid King · 0eb9fa39 · 2d14fafe
Commit 2d14fafe authored Mar 22, 2016 by Orvid King
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folly/configure.ac folly/configure.ac +1 -1

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--- a/folly/configure.ac
+++ b/folly/configure.ac
@@ -236,7 +236,7 @@ AC_CACHE_CHECK(
  [for c++11 atomic support without GNU Atomic library],
  [folly_cv_lib_libatomic],
  [AC_LINK_IFELSE(
-    [AC_LANG_SOURCE[
+    [AC_LANG_PROGRAM[
      #include <atomic>
      int main() {
        struct Test { int val; };