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Old 08-20-2012, 10:27 PM   #36
twobob
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okay so to this end let's use an app. fftw-wisdom is one I was wanting to play with : )

For obvious reasons.

so step 1) use readelf to find dependant stuffs.

(I've tidied the output up)
Code:
[root@kindle bin]# readelf -d fftw-wisdom
     22566:	calling init: /lib/libc.so.6
     22566:	calling init: /lib/libgcc_s.so.1
     22566:	calling init: /mnt/us/usr/lib/libz.so.1
     22566:	initialize program: readelf
     22566:	transferring control: readelf

Dynamic section at offset 0xa00c contains 27 entries:
  Tag        Type                         Name/Value
 0x00000001 (NEEDED)                     Shared library: [libfftw3.so.3]
 0x00000001 (NEEDED)                     Shared library: [libm.so.6]
 0x00000001 (NEEDED)                     Shared library: [libc.so.6]
 0x0000000f (RPATH)                      Library rpath: [/home/you/BLDS/buildroot/build/fftw-3.3/.libs]
     22566:	calling fini: readelf [0]
     22566:	calling fini: /mnt/us/usr/lib/libz.so.1 [0]
     22566:	calling fini: /lib/libgcc_s.so.1 [0]
     22566:	calling fini: /lib/libc.so.6 [0]
     22566:
That's with the LD_DEBUG mods giving us some input too.
Ugly RPATH there. : \



So anyways, I figure.

b) copy the stuff to a test folder and nerf my handsets env variables.

then c) launch it via a VERY simple one or two liner script. perhaps a generic one accepting the app as an argument, or if that is too much typing just one per app.

the requirement would be that the $PWD is the executing directory and perhaps this too could be coerced within the script. Certainly a [ -e] or something won't hurt.

okay well I'm hooking this up now.

libs in /libs folder
app in root.
script in root.

Code:
#!/bin/sh

######################################
#suck, squeeze, bang, blow?
######################################

#One way
#env LD_LIBRARY_PATH=$PWD:/usr/local/bin:/bin:/usr/bin:/usr/sbin:/sbin\
#./fftw-wisdom

#Another way
/lib/ld-linux.so.3 --library-path $PWD/lib:/usr/lib:/lib \
--inhibit-rpath libfftw3.so.3 ./fftw-wisdom
Cheers.

Last edited by twobob; 08-20-2012 at 11:00 PM. Reason: Ugly RPATH there. : \ added two ways
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