Hello -- I am unable to build R 2.9.2 on IBM PowerPC AIX5.3. I would appreciate any help in this matter. ===============details=============================Machine: IBM PowerPC_POWER5 / 4 proc, 1499 MHz 64-bit / AIX 5.3.0.0 Building R 2.9.2 using gcc/g++/gfortran 4.2.4 Config.site changes are: OBJECT_MODE=64 CONFIG_SHELL=/usr/bin/bash LIBICONV=/opt/freeware/lib AR="ar -X64" CC="gcc -maix64" F77="gfortran -maix64" LDFLAGS="-L/opt/freeware/lib64 -L/opt/freeware/64/lib -L/opt/freeware/lib -L/usr/local/lib" CXX="g++ -maix64" FC="gfortran -maix64" R_BROWSER=/opt/freeware/bin/firefox MAKE=/opt/freeware/bin/make Command for configure: ./configure --enable-R-shlib Looks like I have to set OBJECT_MODE explicitly on the command line. So, I enter: set OBJECT_MODE=64. It does not seem to help that I have it in config.site. make stops with the following error: gcc -maix64 -std=gnu99 -Wl,-brtl -Wl,-bexpall -Wl,-bpT:0x100000000 -Wl,-bpD:0x110000000 -lc -L/opt/freeware/lib64 -L/opt/freeware/64/lib -L/opt/freeware/lib -L/usr/local/lib -o R.bin Rmain.o -L../../lib -lR ld: 0711-224 WARNING: Duplicate symbol: .memcpy ...duplicate symbol warning for: memcpy,bcopy,memset,fres ld: 0711-317 ERROR: Undefined symbol: R_running_as_main_program collect2: ld returned 8 exit status make: The error code from the last command is 1.