Re: Linking agains .so library on linux

[Andrew Johnson <anj@aps.anl.gov>]

Hi Tim,

Slides 16 and 17 of this talk might help:

http://www.aps.anl.gov/epics/docs/APS2015/27-EPICS-Programming.pdf

- Andrew


On 06/20/2016 01:07 PM, Madden, Timothy J. wrote:
> 
> 
> Thanks (again) Mark.
> 
> I got it to work as long as I copied the libs to my ADPCO/lib/linux_x86_64 dir.
> To point the linker to the right dir I am using:
> 
> PROD_LDFLAGS +=-Wl,-rpath,/local/pco/sisw/lib64
> 
> That path does show up in the final link command, but it cannot find the libs in that dir. How does one tell a directory with PROD_SYS_LIBS?
> 
> Make file is like this:
> 
> PROD_LDFLAGS +=-Wl,-rpath,/local/pco/sisw/lib64
> PROD_LIBS += pco 
> PROD_LIBS += cameralink caputRecorder
> PROD_SYS_LIBS += clsersis display fglib5  
> 
> 
> The command is like  below. The only snag at this point is that I don't know how to point the linker to the proper dir containing the PROD_SYS_LIBs.
> 
> Thanks again
> T
> 
> 
> /usr/bin/g++ -o pcoApp -Wl,-Bstatic -L/local/pco/EPICS/base-3.14.12.5/lib/linux-x86_64 -L/local/pco/EPICS/synApps_5_5/support/areaDetector/ADCameralink/lib/linux-x86_64 -L/local/pco/EPICS/synApps_5_5/support/areaDetector/ADCore/lib/linux-x86_64 -L/local/pco/EPICS/synApps_5_5/support/areaDetector/ADPCO/lib/linux-x86_64 -L/local/pco/EPICS/synApps_5_5/support/asyn4-26/lib/linux-x86_64 -L/local/pco/EPICS/synApps_5_5/support/autosave-4-7/lib/linux-x86_64 -L/local/pco/EPICS/synApps_5_5/support/busy-1-3/lib/linux-x86_64 -L/local/pco/EPICS/synApps_5_5/support/calc-2-8/lib/linux-x86_64 -L/local/pco/EPICS/synApps_5_5/support/caputRecorder-1-4-2/lib/linux-x86_64 -L/local/pco/EPICS/synApps_5_5/support/seq-2-2-3/lib/linux-x86_64 -L/local/pco/EPICS/synApps_5_5/support/sscan-2-6-6/lib/linux-x86_64 -L/local/pco/hdf/lib -L/local/pco/szip/lib -Wl,-rpath,/local/pco/EPICS/base-3.14.12.5/lib/linux-x86_64 -Wl,-rpath,/local/pco/EPICS/synApps_5_5/support/areaDetector/ADCameralink/lib/linux-x86_64 
 -!
>  Wl,-rpath,/local/pco/EPICS/synApps_5_5/support/areaDetector/ADCore/lib/linux-x86_64 -Wl,-rpath,/local/pco/EPICS/synApps_5_5/support/areaDetector/ADPCO/lib/linux-x86_64 -Wl,-rpath,/local/pco/EPICS/synApps_5_5/support/asyn4-26/lib/linux-x86_64 -Wl,-rpath,/local/pco/EPICS/synApps_5_5/support/autosave-4-7/lib/linux-x86_64 -Wl,-rpath,/local/pco/EPICS/synApps_5_5/support/busy-1-3/lib/linux-x86_64 -Wl,-rpath,/local/pco/EPICS/synApps_5_5/support/calc-2-8/lib/linux-x86_64 -Wl,-rpath,/local/pco/EPICS/synApps_5_5/support/caputRecorder-1-4-2/lib/linux-x86_64 -Wl,-rpath,/local/pco/EPICS/synApps_5_5/support/seq-2-2-3/lib/linux-x86_64 -Wl,-rpath,/local/pco/EPICS/synApps_5_5/support/sscan-2-6-6/lib/linux-x86_64 -Wl,-rpath,/local/pco/hdf/lib -Wl,-rpath,/local/pco/szip/lib        -m64        -Wl,-rpath,/local/pco/sisw/lib64        pcoApp_registerRecordDeviceDriver.o pcoAppMain.o   -lpco -lcameralink -lcaputRecorder -lNDPlugin -lADBase -lnetCDF -lNeXus -lcalc -lbusy -lsscan -lautosave -lasyn
  !
>  -lseq -lpv -lrecIoc -lsoftDevIoc -lmiscIoc -lrsrvIoc -ldbtools!
>  Ioc -lasIoc -ldbIoc -lregistryIoc -ldbStaticIoc -lca -lCom -lhdf5 -lsz -Wl,-Bdynamic -lclsersis -ldisplay -lfglib5 -ltiff -ljpeg -lxml2 -lz -lpthread   -lreadline -lm -lrt -ldl -lgcc
> 
> 
> _____________________________
> From: Mark Rivers [rivers@cars.uchicago.edu]
> Sent: Monday, June 20, 2016 12:18 PM
> To: Madden, Timothy J.
> Cc: tech-talk@aps.anl.gov
> Subject: Re: Linking agains .so library on linux
> 
> You need to reference your vendor .so file using PROD_SYS_LIBS not PROD_LIBS.
> 
> Mark
> 
> 
> Sent from my iPhone
> 
> On Jun 20, 2016, at 11:15 AM, Madden, Timothy J. <tmadden@aps.anl.gov<mailto:tmadden@aps.anl.gov>> wrote:
> 
> Dear EPICS:
> 
> 
> I want to link an IOC against an .so supplied by a vendor. The compile seems to only look for .a type libraries.
> Also I notice that on linking, -Bstatic is turned on. (I am using linux).
> I have epics base CONFIG_SITE file set to:
> SHARED_LIBRARIES=YES
> 
> #  Build client objects statically ?
> #        must be either YES or NO
> #
> STATIC_BUILD=NO
> 
> This seems like it should work.
> 
> How do I get rid of the -Bstatuc on my link, so it will look for .so files on link?
> 
> Here is the failing command:
> 
> /usr/bin/g++ -o pcoApp -Wl,-Bstatic -L/local/pco/EPICS/base-3.14.12.5/lib/linux-x86_64 -L/local/pco/EPICS/synApps_5_5/support/areaDetector/ADCameralink/lib/linux-x86_64 -L/local/pco/EPICS/synApps_5_5/support/areaDetector/ADCore/lib/linux-x86_64 -L/local/pco/EPICS/synApps_5_5/support/areaDetector/ADPCO/lib/linux-x86_64 -L/local/pco/EPICS/synApps_5_5/support/asyn4-26/lib/linux-x86_64 -L/local/pco/EPICS/synApps_5_5/support/autosave-4-7/lib/linux-x86_64 -L/local/pco/EPICS/synApps_5_5/support/busy-1-3/lib/linux-x86_64 -L/local/pco/EPICS/synApps_5_5/support/calc-2-8/lib/linux-x86_64 -L/local/pco/EPICS/synApps_5_5/support/caputRecorder-1-4-2/lib/linux-x86_64 -L/local/pco/EPICS/synApps_5_5/support/seq-2-2-3/lib/linux-x86_64 -L/local/pco/EPICS/synApps_5_5/support/sscan-2-6-6/lib/linux-x86_64 -L/local/pco/hdf/lib -L/local/pco/sisw/lib64 -L/local/pco/szip/lib -Wl,-rpath,/local/pco/EPICS/base-3.14.12.5/lib/linux-x86_64 -Wl,-rpath,/local/pco/EPICS/synApps_5_5/support/areaDetector/ADCame
 r!
>  alink/lib/linux-x86_64 -Wl,-rpath,/local/pco/EPICS/synApps_5_5/support/areaDetector/ADCore/lib/linux-x86_64 -Wl,-rpath,/local/pco/EPICS/synApps_5_5/support/areaDetector/ADPCO/lib/linux-x86_64 -Wl,-rpath,/local/pco/EPICS/synApps_5_5/support/asyn4-26/lib/linux-x86_64 -Wl,-rpath,/local/pco/EPICS/synApps_5_5/support/autosave-4-7/lib/linux-x86_64 -Wl,-rpath,/local/pco/EPICS/synApps_5_5/support/busy-1-3/lib/linux-x86_64 -Wl,-rpath,/local/pco/EPICS/synApps_5_5/support/calc-2-8/lib/linux-x86_64 -Wl,-rpath,/local/pco/EPICS/synApps_5_5/support/caputRecorder-1-4-2/lib/linux-x86_64 -Wl,-rpath,/local/pco/EPICS/synApps_5_5/support/seq-2-2-3/lib/linux-x86_64 -Wl,-rpath,/local/pco/EPICS/synApps_5_5/support/sscan-2-6-6/lib/linux-x86_64 -Wl,-rpath,/local/pco/hdf/lib -Wl,-rpath,/local/pco/sisw/lib64 -Wl,-rpath,/local/pco/szip/lib        -m64                pcoApp_registerRecordDeviceDriver.o pcoAppMain.o   -lpco -lcameralink -lcaputRecorder -lclsersis -lNDPlugin -lADBase -lnetCDF -lNeXus -lc
 a!
>  lc -lbusy -lsscan -lautosave -lasyn -lseq -lpv -lrecIoc -lsoft!
>  DevIoc -lmiscIoc -lrsrvIoc -ldbtoolsIoc -lasIoc -ldbIoc -lregistryIoc -ldbStaticIoc -lca -lCom -lhdf5 -lsz -Wl,-Bdynamic -ltiff -ljpeg -lxml2 -lz -lpthread   -lreadline -lm -lrt -ldl -lgcc
> /usr/bin/ld: cannot find -lclsersis
> collect2: ld returned 1 exit status
> 
> 
> 
> Tim Madden
> Argonne
> 

-- 
Arguing for surveillance because you have nothing to hide is no
different than making the claim, "I don't care about freedom of
speech because I have nothing to say." -- Edward Snowdon