Experimental Physics and
Industrial Control System

rivers via Core-talk <[email protected]> · Thu, 26 Sep 2019 16:23:23 -0000

> Mark, if you want to understand what flags were used to build a binary, then the output of 'readelf' is quite helpful.

Thanks.  Here is the readelf output
corvette:pointGreyIOC/bin/linux-x86_64>readelf -d pointGreyApp

Dynamic section at offset 0x12caa90 contains 34 entries:
  Tag        Type                         Name/Value
 0x0000000000000001 (NEEDED)             Shared library: [libflycapture.so.2]
 0x0000000000000001 (NEEDED)             Shared library: [libX11.so.6]
 0x0000000000000001 (NEEDED)             Shared library: [libXext.so.6]
 0x0000000000000001 (NEEDED)             Shared library: [libpthread.so.0]
 0x0000000000000001 (NEEDED)             Shared library: [libreadline.so.6]
 0x0000000000000001 (NEEDED)             Shared library: [librt.so.1]
 0x0000000000000001 (NEEDED)             Shared library: [libdl.so.2]
 0x0000000000000001 (NEEDED)             Shared library: [libstdc++.so.6]
 0x0000000000000001 (NEEDED)             Shared library: [libm.so.6]
 0x0000000000000001 (NEEDED)             Shared library: [libgcc_s.so.1]
 0x0000000000000001 (NEEDED)             Shared library: [libc.so.6]
 0x000000000000000c (INIT)               0x5cae30
 0x000000000000000d (FINI)               0x12b3b5c
 0x0000000000000019 (INIT_ARRAY)         0x1829d58
 0x000000000000001b (INIT_ARRAYSZ)       1240 (bytes)
 0x000000000000001a (FINI_ARRAY)         0x182a230
 0x000000000000001c (FINI_ARRAYSZ)       8 (bytes)
 0x000000006ffffef5 (GNU_HASH)           0x400298
 0x0000000000000005 (STRTAB)             0x4bac68
 0x0000000000000006 (SYMTAB)             0x42b748
 0x000000000000000a (STRSZ)              967743 (bytes)
 0x000000000000000b (SYMENT)             24 (bytes)
 0x0000000000000015 (DEBUG)              0x0
 0x0000000000000003 (PLTGOT)             0x18cb000
 0x0000000000000002 (PLTRELSZ)           14064 (bytes)
 0x0000000000000014 (PLTREL)             RELA
 0x0000000000000017 (JMPREL)             0x5c7740
 0x0000000000000007 (RELA)               0x5b3130
 0x0000000000000008 (RELASZ)             83472 (bytes)
 0x0000000000000009 (RELAENT)            24 (bytes)
 0x000000006ffffffe (VERNEED)            0x5b2fc0
 0x000000006fffffff (VERNEEDNUM)         7
 0x000000006ffffff0 (VERSYM)             0x5a70a8
 0x0000000000000000 (NULL)               0x0

Note that it does not contain a RUNPATH at all, which explains the problem.

This is happening even though I have applied Bruce's patch and my CONFIG.Common.linuxCommon contains this:
SHRLIBDIR_RPATH_LDFLAGS_YES = $(SHRLIB_DEPLIB_DIRS:%=-Wl,-rpath,%)
SHRLIBDIR_LDFLAGS += \
    $(SHRLIBDIR_RPATH_LDFLAGS_$(LINKER_USE_RPATH))

Let me explain what I am trying to do:
- Build a static executable
- Building with the vendor library which is only provided as a shared library.

My Makefile contains this:
# We use PROD_SYS_LIBS even though libflycapture.so is in the ADPointGrey tree
# because we are doing static build but the file is a .so file, not a .a file.
PROD_SYS_LIBS_Linux += flycapture

So I have to use PROD_SYS_LIBS_Linux, rather than PROD_LIBS, because PROD_LIBS only looks for a .a file if building statically.

I want RUNPATH to include the path to that vendor library that I installed in ADPointGrey.  

How do I do that?

-- 
https://code.launchpad.net/~bhill/epics-base/+git/epics-base/+merge/373243
Your team EPICS Core Developers is requested to review the proposed merge of ~bhill/epics-base:shared-rpath-independent-of-static-build into epics-base:7.0.

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System