Trying to compile R Package RSAP - r

Question

I'm trying to compile the R Package RSAP using the command
R CMD INSTALL RSAP
The necessary SAP library SAP NW RFCSDK is located in C:\nwrfcsdk.
I'm building on Windows 10 64
R version 3.4 32 bit (I tired 64 as well)
R tools with mingw32
It does not compile but terminates with the following errors:
c:/Rtools/mingw_32/bin/gcc -shared -s -static-libgcc -o RSAP.dll tmp.def RSAP.o -L. -LC:/nwrfcsdk/lib -lsapnwrfc -llibsapucum -Ld:/Compiler/gcc-4.9.3/local330/lib/i386 -Ld:/Compiler/gcc-4.9.3/local330/lib -LC:/PROGRA~1/R/R-34~1.0/bin/i386 -lR
RSAP.o:RSAP.c:(.text+0x4b): undefined reference to `RfcPing#8'
RSAP.o:RSAP.c:(.text+0x23a): undefined reference to `RfcUTF8ToSAPUC#24'
RSAP.o:RSAP.c:(.text+0x2d5): undefined reference to `RfcUTF8ToSAPUC#24'
RSAP.o:RSAP.c:(.text+0x369): undefined reference to `RfcUTF8ToSAPUC#24'
RSAP.o:RSAP.c:(.text+0x3ef): undefined reference to `RfcSAPUCToUTF8#24'
RSAP.o:RSAP.c:(.text+0x4b8): undefined reference to `RfcSAPUCToUTF8#24'
RSAP.o:RSAP.c:(.text+0x645): undefined reference to `RfcUTF8ToSAPUC#24'
RSAP.o:RSAP.c:(.text+0x6e3): undefined reference to `RfcUTF8ToSAPUC#24'
RSAP.o:RSAP.c:(.text+0x719): undefined reference to `RfcOpenConnection#12'
RSAP.o:RSAP.c:(.text+0x923): undefined reference to `RfcCloseConnection#8'
...
and so on until it stops with
collect2.exe: error: ld returned 1 exit status
keine DLL erzeugt
ERROR: compilation failed for package 'RSAP'
* removing 'C:/Users/jmueller/R/win-library/3.4/RSAP'
* restoring previous 'C:/Users/jmueller/R/win-library/3.4/RSAP'
What am I doing wrong? Any help is highly appreciated!

Answer 1

This is what happens when you try to build RSAP in the 32-bit environment of R using the 64-bit version of the SAP NW RFC SDK. I had the same problem and after executing the following command in the 64-bit environment of RGui (with the 64-bit version of SAP NW RFC SDK located in C:\nwrfcsdk) the undefined references were gone.
Command:
install.packages('RSAP', repos=c('http://piersharding.com/R'), type="source", configure.args=c('--with-nwrfcsdk-include=C:/nwrfcsdk/include --with-nwrfcsdk-lib=C:/nwrfcsdk/lib'))
as described in:
https://github.com/piersharding/RSAP/blob/master/INSTALL