My guess would be that the wrong mix of libraries have been linked.

AFAICT, Rfc.xs itself does not directly reference memsetU16, it uses memsetU instead, which presumably is mapped to memsetU16 (the UTF-16 variant — also see an old proposal) somewhere in one of the SAP libs when compiled with Unicode support. The correct library which provides the implementation of the symbol, however, doesn't seem to have been specified to the linker... (which - with memsetU16 being an indirect dependency - wouldn't necessarily produce an error at build-time, but only at run-time...)

I can't be more specific (as I don't have the SAP libs), but the following tools might help to narrow down on where the problem lies:  ldd (list shared lib dependencies), and nm or objdump (list symbols a lib provides/references).  For example, try

$ ldd ./blib/arch/auto/SAP/Rfc/Rfc.so
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to find out which (SAP-)libs the module's XS component has in fact been linked against (and what they map to at load time).  Then something like

$ objdump -tT /path/to/sap-libs/libsapu16.so | grep memsetU
$ objdump -ftT /path/to/sap-libs/* | grep 'file format\|memsetU'
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to hunt for which libs implement (type ".text") or reference (type "*UND*") the respective memsetU* function(s) ... — You get the idea.   (As I said, my guess would be that the lib which does provide memsetU16 will not show up in the ldd output.)

With that info you'll likely have a better chance of figuring out what went wrong with perl Makefile.PL, and how to fix it...  Good luck!

I've run into a similar problem now and here are the results from ldd and objdump as mentioned above:




$ ldd ~/SAP_RFC/INSTALL/lib/perl/5.10.1//auto/SAP/Rfc/Rfc.so
        linux-vdso.so.1 =>  (0x00007fff643df000)
        libm.so.6 => /lib/libm.so.6 (0x00007f0882898000)
        libdl.so.2 => /lib/libdl.so.2 (0x00007f0882694000)
        libpthread.so.0 => /lib/libpthread.so.0 (0x00007f0882477000)
        libc.so.6 => /lib/libc.so.6 (0x00007f0882115000)
        libstdc++.so.6 => /usr/lib/libstdc++.so.6 (0x00007f0881e01000)
        librfcum.so => ~/SAP_RFC/rfcsdk//lib/librfcum.so (0x00007f0881
+749000)
        /lib64/ld-linux-x86-64.so.2 (0x00007f0882d36000)
        libgcc_s.so.1 => /lib/libgcc_s.so.1 (0x00007f0881533000)
        librt.so.1 => /lib/librt.so.1 (0x00007f088132b000)
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$ objdump -tT ~/SAP_RFC/rfcsdk/lib/libsapu16.so | grep memsetU
0000000000008640 g     F .text  00000000000001c6              memsetU1
+6
00000000000089fc g     F .text  000000000000000a              memsetU
0000000000008640 g    DF .text  00000000000001c6  Base        memsetU1
+6
00000000000089fc g    DF .text  000000000000000a  Base        memsetU
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$ objdump -ftT ~/SAP_RFC/rfcsdk/lib/* | grep 'file format\|memsetU'
~/SAP_RFC/rfcsdk/lib/libicudata.so.34:     file format elf64-x86-64
~/SAP_RFC/rfcsdk/lib/libicui18n.so.34:     file format elf64-x86-64
~/SAP_RFC/rfcsdk/lib/libicuuc.so.34:     file format elf64-x86-64
objdump: rfcilib.o: not a dynamic object
rfcilib.o:     file format elf64-x86-64
0000000000000000         *UND*  0000000000000000 memsetU16
objdump: cpictlib.o: not a dynamic object
cpictlib.o:     file format elf64-x86-64
00000000000057d0 g     F .text.hot      00000000000001c6 memsetU16
000000000005445e g     F .text.unlikely 000000000000000a memsetU
objdump: rsec4lib.o: not a dynamic object
objdump: rsec4lib.o:     file format elf64-x86-64
rscpa0lib.o: not a dynamic object
rscpa0lib.o:     file format elf64-x86-64
0000000000000000         *UND*  0000000000000000 memsetU16
objdump: rscpuc2lib.o: not a dynamic object
rscpuc2lib.o:     file format elf64-x86-64
~/SAP_RFC/rfcsdk/lib/librfcum.so:     file format elf64-x86-64
00000000001fecf0 l     F .text  00000000000001e3              memsetU1
+6
00000000001ec78e l     F .text  000000000000000a              memsetU
~/SAP_RFC/rfcsdk/lib/libsapu16_mt.so:     file format elf64-x86-64
0000000000008ba0 g     F .text  00000000000001e3              memsetU1
+6
0000000000008d97 g     F .text  000000000000000a              memsetU
0000000000008ba0 g    DF .text  00000000000001e3  Base        memsetU1
+6
0000000000008d97 g    DF .text  000000000000000a  Base        memsetU
~/SAP_RFC/rfcsdk/lib/libsapu16.so:     file format elf64-x86-64
0000000000008640 g     F .text  00000000000001c6              memsetU1
+6
00000000000089fc g     F .text  000000000000000a              memsetU
0000000000008640 g    DF .text  00000000000001c6  Base        memsetU1
+6
00000000000089fc g    DF .text  000000000000000a  Base        memsetU
~/SAP_RFC/rfcsdk/lib/libsapucum.so:     file format elf64-x86-64
0000000000038d90 g     F .text  00000000000001e3              memsetU1
+6
000000000002ce6e g     F .text  000000000000000a              memsetU
0000000000038d90 g    DF .text  00000000000001e3  libsapucum.so memset
+U16
000000000002ce6e g    DF .text  000000000000000a  libsapucum.so memset
+U
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Thanks for the response... I thought of that before but, unfortunately, it didn't change anything.

hostblabla:# echo $LD_LIBRARY_PATH
/tmp/saprfctest/SAP-Rfc-1.55/blib/arch/auto/SAP/Rfc:/usr/sap/rfcsdk
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The make test throws the same error.

undefined symbol: memsetU16 at /usr/lib/perl/5.10/DynaLoader.pm line 1
+96
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This leads me to believe that something is maybe messed up with the Dynaloader module in my perl distribution. But I'm just guessing...

I know this is a long shot - it's a long time ago, but did you ever get it to work. I'm having the same problem today...