Re: Asyn Module Cross-Compilation: Cannot find -ltirpc

["Johnson, Andrew N. via Tech-talk" <tech-talk at aps.anl.gov>]

Hi Jacob,

 

Whether you need to use tirpc for the cRIO build would depend on the libc (presumably glibc) that your linux-x86_64-cRIO target uses, not what OS the cross-compiler runs on. I don't know the answer to that, but given the error you are seeing have you tried setting TIRPC=NO in your CONFIG_SITE.Common.linux-x86_64.linux-x86_64-cRIO file? That tells the Asyn build that the RPC routines are found in the standard C libraries, not in an external rpc library.

 

If you have been told that you need to use tirpc for the target, it might be that you also need to install a -devel package. On my RHEL-8 system here the host's libtirpc.so.3.0.0 shared library is installed from the RPM libtirpc-1.1.4-8.el8.x86_64 but there is a soft-link used for library versioning and that Asyn actually links to which comes from the RPM libtirpc-devel-1.1.4-8.el8.x86_64 (and also provides the header files):

 

voltctl% ls -l /usr/lib64/libtirpc*

lrwxrwxrwx  1 root root     17 Aug  3  2022 /usr/lib64/libtirpc.so -> libtirpc.so.3.0.0*

lrwxrwxrwx. 1 root root     17 Aug  3  2022 /usr/lib64/libtirpc.so.3 -> libtirpc.so.3.0.0*

-rwxr-xr-x. 1 root root 217696 Aug  3  2022 /usr/lib64/libtirpc.so.3.0.0*

voltctl% rpm -qf /usr/lib64/libtirpc.so.3

libtirpc-1.1.4-8.el8.x86_64

voltctl% rpm -qf /usr/lib64/libtirpc.so.3.0.0        

libtirpc-1.1.4-8.el8.x86_64

voltctl% rpm -qf /usr/lib64/libtirpc.so

libtirpc-devel-1.1.4-8.el8.x86_64

 

 

HTH,

 

- Andrew

 

-- 

Complexity comes for free, Simplicity you have to work for.

 

 

On 7/15/24, 3:09 PM, "Tech-talk" <tech-talk-bounces at aps.anl.gov> wrote:

 

Hello EPICS community,

 

I am currently working on a project where I need to cross-compile my EPICS environment for my linux-x86_64-cRIO target. I was able to compile EPICS base with the target architecture included as a STATIC_BUILD. To do this I followed the steps show below:

1.      Downloaded and ran the National instruments GNU C & C++ Compile Tools x64 (Version: 2023 Q4)

2.      In my epics-base configure directory, I added the following files:

·         CONFIG_SITE.local

o    CROSS_COMILER_TARGET_ARCHS += linux-x86_64-cRIO

·         os/CONFIG_SITE.Common.linux-x86_64.linux-x86_64-cRIO

o    STATIC_BUILD=YES

o    SHARED_LIBRARIES=NO

·         os/CONFIG.Common.linux-x86_64-cRIO

3.      After these are included, I am able to run make under epics-base successfully.

 

However, I am encountering an issue during the compilation process of Asyn, specifically with the following error message:

 

“/ni/oecore-x86_64/sysroots/x86_64-nilrtsdk-linux/usr/libexec/x86_64-nilrt-linux/gcc/x86_64-nilrt-linux/11.3.0/ld: cannot find -ltirpc: No such file or directory

Collect2: error: ld returned 1 exit status”

 

The ‘ni/oecore-x86_64’ is the directory I have downloaded my GNU C & C++ Compiler Toolchain. Additionally, I have confirmed that libtirpc should also be included with the compile toolchain for my cRIO target, along with numerous other libraries.

 

I understand the ltripc is the library for the RPC (Remote Procedure Call) interface; I have set the TIRPC=YES flag in my ‘asyn/configure/CONFIG_SITE’ file since I am running RHEL 8.10.

 

Could anyone provide guidance or share their experiences with cross-compiling the Asyn module for a cRIO target using libtirpc.

 

Best,

Jacob R.