Re: configure scripts and non-standard library paths

From: Dan Espen (daneNO_at_SPAM.mk.telcordia.com)
Date: 09/16/05 

Date: Fri, 16 Sep 2005 08:50:10 -0400

Lionel B <me@privacy.net> writes:

> Kilian A. Foth wrote:
>> Lionel B <me@privacy.net> wrote:
>>
>>>Greetings,
>>
>>> I have some non-standard lib/include paths on my system, which
>>> frequently causes problems when trying to compile tarballs;
>>> specifically, configure scripts often fail to find required
>>> libraries (as far as I can make out, this seems to be due to
>>> failure of the AC_CHECK_LIB and AC_CHECK_HEADER macros).
>>
>>> Not being an autoconf expert, can anyone suggest a "generic hack"
>>> (maybe a configure.in hack?) for telling a configure script to
>>> include additional directories in its library/include search paths,
>>> either for all libraries or just specific libraries?
>> Have you tried a global export CFLAGS="-I/my/strange/path/include
>> -L/my/strange/path/lib"
>> yet?
>
> Right, got it... I find I have to specify flags in the configure
> command line (for some reason just setting/exporting the env vars
> doesn't seem to work):
>
> ./configure ... LDFLAGS=-L/my/strange/path/lib
> CPPFLAGS=-I/my/strange/path/include
>
> gets me a clean configure/make/make install. Then I also have to add
> /my/strange/path/lib to LD_LIBRARY_PATH (else the binary fails to find
> the dynamic libs) and all is hunk-dory.

Using LD_LIBRARY_PATH is not recommended. (Do some Google searches.)
Try this instead:

LDFLAGS='-L/my/strange/path/lib -Wl,-rpath /my/strange/path/lib'

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