xstrtoll: new module * modules/xstrtoll: New file. * MODULES.html.sh (Numeric conversion functions): Add xstrtoll. * lib/xstrtol.h [HAVE_LONG_LONG_INT]: Declare xstrtoll and xstrtoull. * lib/xstrtoll.c, lib/xstrtoull.c: New files. ./configure fails if you use this module and lack "long long". * modules/xstrtoll-tests: New module. * tests/test-xstrtoll.c, tests/test-xstrtoull.c: New files. * tests/test-xstrtoll.sh: Like test-xstrtol.c, but use the new init.sh-based test framework.

--- a/lib/xstrtol.h
+++ b/lib/xstrtol.h
@@ -46,6 +46,11 @@
 _DECLARE_XSTRTOL (xstrtoimax, intmax_t)
 _DECLARE_XSTRTOL (xstrtoumax, uintmax_t)
 
+#if HAVE_LONG_LONG_INT
+_DECLARE_XSTRTOL (xstrtoll, long long int)
+_DECLARE_XSTRTOL (xstrtoull, unsigned long long int)
+#endif
+
 #ifndef __attribute__
 # if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 8)
 #  define __attribute__(x)