Convert 5 m4 checks to cmake modules

cmake/CheckComplexMath1.cmake

@@ -0,0 +1,23 @@
+INCLUDE(CheckCXXSourceCompiles)
+
+MACRO (CHECK_COMPLEX_MATH1 _RESULT)
+
+SET(_CHECK_COMPLEX_MATH1_SOURCE_CODE "
+
+#include<complex>
+
+using namespace std;
+
+int main(int argc, char *argv[])
+{
+  complex<double> x(1.0, 1.0), y(1.0, 1.0);
+  cos(x); cosh(x); exp(x); log(x); pow(x,1); pow(x,double(2.0));
+  pow(x, y); pow(double(2.0), x); sin(x); sinh(x); sqrt(x); tan(x); tanh(x);
+  return 0;
+}
+
+")
+
+CHECK_CXX_SOURCE_COMPILES("${_CHECK_COMPLEX_MATH1_SOURCE_CODE}" ${_RESULT})
+
+ENDMACRO (CHECK_COMPLEX_MATH1)