C++程序  |  8行  |  303 B

/* Long story short: aclocal.m4 depends on autoconf 2.13
 * implementation details wrt "const"; newer versions
 * have different implementation details so for now we
 * put "const" here.  This may cause duplicate definitions
 * in config.h but that should be OK since they're the same.
 */
#undef const