Karl Wette authored Feb 13, 2012 and Adam Mercer committed Feb 27, 2012

 * A ./configure macro checks that memory layout of C99/C++ complex types
   are identical to the old LAL complex structs. If true, each .c file can
   then chose which complex datatype to use - C99 or LAL - while being
   able to call code defined in another .c file which may have used a
   different complex datatype internally.
 * If LAL_USE_OLD_COMPLEX_STRUCTS macro is not defined (i.e. by default),
   use C99 complex datatypes. Define macros for constructing C99/C++
   complex numbers, and accessing/assigning real and imaginary parts.
   Macros use some GCC extensions where available.
Original: ba26dab7e236328ebe597d8be7320d21c5be67eb