more cmake improvements; start removing the autotools stuff.

1 files changed, 9 insertions, 1 deletions

diff --git a/cmake/modules/CheckLongDouble.cmake b/cmake/modules/CheckLongDouble.cmake
index 8baa072a0..39263f4ab 100644
--- a/cmake/modules/CheckLongDouble.cmake
+++ b/cmake/modules/CheckLongDouble.cmake
@@ -4,9 +4,17 @@ MACRO (CHECK_LONG_DOUBLE _RESULT)
 
 SET(_CHECK_LONG_DOUBLE_SOURCE_CODE "
 
+#include <cmath>
+
 int main(int argc, char *argv[])
 {
-  long double ld = static_cast<long double>(0);
+  long double ld = static_cast<long double>(1);
+  sqrt(ld);
+  cos(ld);
+  sin(ld);
+  exp(ld);
+  log(ld);
+  fabs(ld);
   return 0;
 }