Compiler INFO strings built at preprocessing time encode information
that must appear as a string literal in the resulting binary. We must
make sure the strings appear in the final binary no matter what compiler
and flags are used. The previous implementation worked in most places
but failed with the GNU linker's --gc-sections option which managed to
discard the string. Instead we make the program return value depend on
an element of the string indexed by a runtime program parameter, which
absolutely requires the string to be present.
ENH: change test for endianess from TRY_RUN() to TRY_COMPILE() by testing
the binary image of a 16bit integer array, tested on Linux x86, Intel Mac
and Sun (big endian)
Alex