Issue #1580: use short float repr where possible. - incorporate and adapt David Gay's dtoa and strtod into the Python core - on platforms where we can use Gay's code (almost all!), repr(float) is based on the shortest sequence of decimal digits that rounds correctly. - add sys.float_repr_style attribute to indicate whether we're using Gay's code or not - add autoconf magic to detect and enable SSE2 instructions on x86/gcc - slight change to repr and str: repr switches to exponential notation at 1e16 instead of 1e17, str switches at 1e11 instead of 1e12

/* Return the compiler identification, if possible. */

#include "Python.h"

#ifndef COMPILER

#ifdef __GNUC__
#define COMPILER "\n[GCC " __VERSION__ "]"
#endif

#endif /* !COMPILER */

#ifndef COMPILER

#ifdef __cplusplus
#define COMPILER "[C++]"
#else
#define COMPILER "[C]"
#endif

#endif /* !COMPILER */

const char *
Py_GetCompiler(void)
{
	return COMPILER;
}