Message-ID: <afc182bb-fc58-4219-a023-9ab3f7eba7da@gmail.com>
Date: Fri, 6 Feb 2026 23:23:47 +0000
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User-Agent: Mozilla Thunderbird
Subject: Re: Linker not finding library
To: Stefano Cossu <stefano@cossu.cc>, ~alpine/users@lists.alpinelinux.org
References: <6ee42c20-2936-4655-ba61-608902f5e837@cossu.cc>
 <6e887475-e0b3-4caf-bd50-3460cdf4bc6e@gmail.com>
 <55ea288f-e220-48e6-9308-9d2d46a6a541@cossu.cc>
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From: Naomi Rennie-Waldock <naomi.renniewaldock@gmail.com>
In-Reply-To: <55ea288f-e220-48e6-9308-9d2d46a6a541@cossu.cc>
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On 06/02/2026 23:15, Stefano Cossu wrote:
> Thanks for the reference to lazy bindings, Naomi. Eventually I will 
> have to resolve it for Lua as well and I'll keep your reference handy, 
> but for now, I tried to compile and execute a program from scratch 
> that uses LMDB, another non-system lib that I need to link against:
>
> / # apk add musl-dev lmdb-dev gcc
> […]
> / # cat test.c
> #include <stdio.h>
> #include "lmdb.h"
>
> int main() {
>     printf("LMDB test: %s\n", mdb_strerror(MDB_SUCCESS));
>     return 0;
> }
>
> / # gcc -llmdb -L/usr/lib test.c -o test.o
> /usr/lib/gcc/x86_64-alpine-linux-musl/15.2.0/../../../../x86_64-alpine-linux-musl/bin/ld: 
> /tmp/ccgjDlGg.o: in function `main':
> test.c:(.text+0xa): undefined reference to `mdb_strerror'
> collect2: error: ld returned 1 exit status
>

Ahh, you've got your arguments are in the wrong order, the lib needs to 
listed be after the sources that depend on it. Example:

~ # gcc lmdb-test.c -llmdb -o lmdb-test && ./lmdb-test
LMDB test: Successful return: 0