@mnunberg I compile the code you put in github,and there are many errors.
Matters focus on below mainly:
typedef void (*OPTION_HANDLER)(char cmd, const void *arg, void *cookie);
static struct {
const char *name;
const char *description;
int argument;
char letter;
OPTION_HANDLER handler;
void *cookie;
} my_options[256] = {
['?'] = {
.name = "help",
.description = "\t-?\t\tPrint program usage information",
.argument = 0,
.letter = '?',
.handler = usage
},
['U'] = {
.name = "spec",
.description = "\t-U spec\t\tCouchbase cluster connection string",
.argument = 1,
.letter = 'U',
.handler = set_char_ptr,
.cookie = &connstr
},
['P'] = {
.name = "password",
.description = "\t-P password\tBucket password (if required)",
.argument = 1,
.letter = 'P',
.handler = set_char_ptr,
.cookie = &passwd,
},
['o'] = {
.name = "file",
.description = "\t-o filename\tSend the output to this file",
.argument = 1,
.letter = 'o',
.handler = set_char_ptr,
.cookie = &filename
},
['c'] = {
.name = "chunked",
.description = "\t-c\t\tUse chunked callback to stream the data",
.argument = 0,
.letter = 'c',
.handler = set_flag,
.cookie = &chunked
},
['d'] = {
.name = "data",
.description = "\t-d\t\tPOST data, e.g. {\"keys\": [\"key1\", \"key2\", ...]}",
.argument = 1,
.letter = 'd',
.handler = set_char_ptr,
.cookie = &post_data
},
['m'] = {
.name = "minify",
.description = "\t-m\t\tMinify JSON rather than beautify",
.argument = 0,
.letter = 'm',
.handler = set_flag,
.cookie = &minify
},
['f'] = {
.name = "force-utf8",
.description = "\t-f\t\tForce utf-8, i.e. allow invalid characters inside strings during parsing",
.argument = 0,
.letter = 'u',
.handler = set_flag,
.cookie = &force_utf8
},
};
Turn out that is my fault,I save it as .cpp 
I’m very sorry