Re: [Bug-apl] Cannot find libemacs on older mac

[Juergen Sauermann]

Hi,

from the GNU APL printout it looks like the file was found, but something is wrong with the file:

    file /Users/alexey/Applications/gnu-apl/lib/apl/libemacs.dylib ( flat namespace
 in /Users/alexey/Applications/gnu-apl/lib/apl/libemacs.dylib )

So GNU APL was able to open the file (using dlopen()) but then gets the "flat namespace" error at some point.

The second link below says:

amandogra commented on Oct 2, 2016

It got solved by OS upgrade.
For someone who comes to this...
I was on Mac OSX El Capitan, but I upgraded to macOS Sierra.
Then, I executed the following command

brew unlink libevent && brew link libevent

This fixed my issue.

The posting was related to a different library but the (rest of the) error message looks very similar (considering
that GNU APL cuts off the start the error message text until the last : in it). The full error message was most likely:

Expected in: flat namespace

Maybe "nm -D" on the dylib file reveals some more information.

Best Regards,
/// Jürgen

On 12/04/2017 04:06 AM, Elias Mårtenson wrote:

Perhaps adding the path to the dylib file in DYLIB_LIBRARY_PATH will help? Don't forget to exprt the variable before starting apl.

Regards,

Elias

On 4 December 2017 at 01:56, Juergen Sauermann <address@hidden> wrote:

Hi,

I haven't changed anything in that area. One poster in one of the links below mentioned that an OS-X upgrade
had fixed a similar problem that the poster had, so my impression is that this is a problem than cannot be fixed
inside GNU APL.

Best Regards,
/// Jürgen

On 12/03/2017 12:02 PM, Elias Mårtenson wrote:

10.6.8 is indeed very old. I thought my Macbook was old and it's running 10.10.

I have to admit that I haven't tried the Emacs mode on OSX in a while since I don't use Macs anymore. That said, last time I did try, it worked fine.

Jürgen, could there be an issue with the way the libraries are built? Did anything change in the last couple of years?

Regards,

Elias

On 3 December 2017 at 18:58, Juergen Sauermann <address@hidden> wrote:

Hi Alexey,

I am not really familiar with emacs or OS X, so Elias is probably better informed than me.

Unfotunately shared libraries are rather platform dependent and so are the error messages that
they produce. From the output below it seems that the file libemacs.dylib exists and was found,
but could not be opened with dlopen(). It might be that your platform needs additional linker flags
for dynamic libraries to work, but I have no idea which ones.

See also:

https://github.com/tmux/tmux/issues/547 or

https://developer.apple.com/library/content/documentation/Porting/Conceptual/PortingUnix/compiling/compiling.html

Best Regards,
/// Jürgen

On 11/30/2017 08:39 PM, Alexey Veretennikov wrote:

Hi,

I've built GNU APL with the following parameters on my old  (OSX 10.6.8) macbook:

./configure --prefix=/Users/alexey/Applications/gnu-apl
make install

So nothing special(I did a small change though since strndup is not yet supported on this OS). I'm using gcc 7.2.0.

However when I try to run apl from emacs, I get the following error:

Could not find shared library 'libemacs'
The following directories and file names were tried:
    file /Users/alexey/Applications/gnu-apl/lib/apl/libemacs.so (No such file or directory)
    file /Users/alexey/Applications/gnu-apl/lib/apl/libemacs.dylib ( flat namespace
 in /Users/alexey/Applications/gnu-apl/lib/apl/libemacs.dylib )
    file /Users/alexey/Applications/gnu-apl/lib/apl/libemacs (No such file or directory)
    directory /usr/lib/apl
    directory /usr/local/lib/apl
    file ./libemacs.so                       (No such file or directory)
    file ./libemacs.dylib                    (No such file or directory)
    file ./libemacs                          (No such file or directory)
    directory ./native
    directory ./emacs_mode

The file /Users/alexey/Applications/gnu-apl/lib/apl/libemacs.dylib exists.

Br,

/Alexey