Experimental Physics and
Industrial Control System

Dennis Nicklaus <[email protected]> · Fri, 28 Jul 2006 13:53:43 -0500

I've tried to build a SNL/sequencer application under linux in both ways
suggested in the

directions in the Makefile, and I seem to be one bit of directions short
in either way.

If I build it as a component of my application, then how do I run it?
For this, I uncomment these lines in the Makefile

ESG_SRCS += sncExample.stt

ESG_LIBS += seq pv

(my application is ESG)

and get things to build, but then after I run st.cmd and am at the
"epics>" prompt of iocsh,

what command do I give to run the sequence?

None of seq, sncExample, seqShow,... work. They just give me a "Command
Not Found" message.
"nm" verifies that the sncExample symbol is there, along with some
related othes

0804c020 d seqChan

U seq_delay

U seq_delayInit

U seqRegisterSequencerCommands

U seqRegisterSequencerProgram

0804c0a0 d seqSS

0804c0c0 D sncExample

0804af54 T sncExampleRegistrar

0804a73c T _start

0804c060 d state_ss1

If I alter the Makefile and make it standalone, I get a complaint that
there is no "main()"

routine, as shown below. Where do I pick up a main() from?

$ make

make -C O.linux-x86 -f ../Makefile TOP=../../.. T_A=linux-x86 install

make[1]: Entering directory
`/mnt/disk1/p/epics/support/agilentsg/ESGApp/src/O.linux-x86'

/usr/bin/g++ -o sncExample -L/p/epics/support/seq/lib/linux-x86/
-L/p/epics/v3_14_8_f2/lib/linux-x86/
-Wl,-rpath,/mnt/disk1/p/epics/support/agilentsg/lib/linux-x86
-Wl,-rpath,/p/epics/support/seq/lib/linux-x86
-Wl,-rpath,/p/epics/support/asyn/4-6/lib/linux-x86
-Wl,-rpath,/p/epics/v3_14_8_f2/lib/linux-x86 sncExample.o
-lseq -lpv -lcas -lgdd -liocsh -lasHost -ldbStaticHost -lregistryIoc
-lca -lCom

/usr/lib/gcc-lib/i386-redhat-linux/3.2.3/../../../crt1.o(.text+0x18): In
function `_start':

: undefined reference to `main'

collect2: ld returned 1 exit status

make[1]: *** [sncExample] Error 1

Thanks,
Dennis

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System