Re: [PATCH 1/2] daemon: Fix '--version'.

[ludo@gnu.org (Ludovic Courtès)]

Alex Vong <alexvong1995@gmail.com> skribis:

> ludo@gnu.org (Ludovic Courtès) writes:

[...]

>> #include <argp.h>
>>
>> const char *argp_program_version = "foo";
>> const char *argp_program_bug_address = "foo@example.org";
>>
>> static const struct argp_option options[] =
>>   {
>>     { "system", 's', "SYSTEM", 0,
>>       "assume SYSTEM as the current system type" },
>>     { 0, 0, 0, 0, 0 }
>>   };
>>
>> static const struct argp argp =
>>   {
>>     options, NULL,
>>     NULL, "doc",
>>     NULL, NULL,
>>     NULL
>>   };
>>
>> int
>> main (int argc, char *argv[])
>> {
>>   argp_parse (&argp, argc, argv, 0, 0, 0);
>>   return 0;
>> }
>
> I think you have isolated the problem! This test case does not work for
> me.
>
>
> I get the following output after building with
> (g++ -O2 -flto version.cxx):

What if you compile with ‘gcc’ (and rename to foo.c) instead of ‘g++’?

It might be a symbol visibility problem, or name mangling issue.

Ludo’.