Re: [PATCH 1/7] gnu: lua: Build with support for dynamic libraries.

[gno <gnopap@gmail.com>]

On 8/30/2016 8:37 AM, Leo Famulari wrote:

> On Tue, Aug 23, 2016 at 02:02:40AM +0200, gno wrote:
>> On Mon, 22 Aug 2016 21:39:12 +0200
>> Ricardo Wurmus <rekado@elephly.net> wrote:
>>> +       #:make-flags
>>> +       '("CFLAGS=-fPIC -DLUA_DL_DLOPEN -DLUA_USE_POSIX"
>>> +         "linux")
>> This doesn't work for me - lua-lgi still complains about lua not being
>> able to dynamically load. But this does work:
>>
>> (replace 'build
>>    (lambda _ (zero? (system* "make"
>>       "LDFLAGS=-ldl" "CFLAGS=-fPIC -DLUA_USE_DLOPEN" "linux"))))
>>
>> I tried adding LDFLAGS in #make-flags to no avail.
> Based on my reading of the Makefile (and the 'src/Makefile'), I think we
> should be using MYCFLAGS and MYLDFLAGS.
>
> CFLAGS and LDFLAGS include MYCFLAGS and MYLDFLAGS, respectively, but
> they also include some default flags and platform-dependent flags. By
> setting CFLAGS and LDFLAGS directly, we lose those default and
> platform-dependent values.
>
> By the way, '-ldl' does get passed to GCC in 'src/Makefile', but I don't
> think it gets passed to the linker, although my knowledge here is not
> strong.

Interesting. I didn't dig that deep either, I just noticed that without
-ldl lua-lgi wont load. I'll investigate a bit further when there is
time and also try to sanitize the flags. I suppose we can discard my
patch (add awesome 3.5).

(damn, i keep forgetting adding guix devel to CC)