GNU MP 6.1.2 error undefined symbol __gmpn_invert_limb in test t-constants

[Vincent Lefevre]

On 2017-08-28 23:33:03 +0200, Niels Möller wrote:
> Vincent Lefevre <vincent at vinc17.net> writes:
> > This only works if the user is root. If a non-root user wants to
> > install libraries in his home directory, the right solution is to
> > use LD_LIBRARY_PATH (since GCC doesn't use a run path by default).
> 
> You'd either use LD_LIBRARY_PATH, which is going to be a bit brittle
> when a build system or other script depends on using LD_LIBRARY_PATH for
> its own purposes,

They can preprend their own directories to $LD_LIBRARY_PATH.

> or compile the stuff needing the libraries with something like.
> 
>   LDFLAGS='-L $HOME/lib/ -Wl,-rpath,$HOME/lib'

which, in turn, may break things. For instance, MPFR uses LD_RUN_PATH
temporarily in its configure script. But if the user uses -rpath,
LD_RUN_PATH will be ignored. And I don't think we should re-implement
all the libtool machinery for the configure script to guess what
should work.

> Neither option is entirely painless, unfortunately.
> 
> In this particular case, it might work better if automake's test binary
> magic did use LD_LIBRARY_PATH and *pre*pended the .lib directory, but I
> guess it does things differently, either using -rpath or *a*ppending
> .lib. 

That's more a libtool thing than an automake one, AFAIK.

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Vincent Lefèvre <vincent at vinc17.net> - Web: <https://www.vinc17.net/>
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