DS-5: recipe for target 'HelloWorld' failed

Hi. I've installed the Community Edition of DS-5 v5.26.2 on a Windows 7 machine. My target is the latest Beaglebone Black Wireless. I've tried several Linaro toolchains. With each toolchain, my attempt to compile the initial Hello World program provided by DS-5 fails. For some of the toolchains, even the macro expression EXIT_SUCCESS is undefined (I substiute 0 for it); for others, it is defined. The failure is always the same. I've tried toolchain version 6.1.1 -- specifically 

gcc-linaro-6.2.1-2016.11-i686-mingw32_arm-linux-gnueabihf

-- as well as versions 4.9.4 and 6.2.1.

The results here are for version 4.9.4, but it's virtually the same result for all three.

The Problems window shows

Description Resource Path Location Type
make: *** [HW621] Error 1 HW621 C/C++ Problem
recipe for target 'HW621' failed makefile /HW621/Debug line 30 C/C++ Problem
syntax error HW621 line 1, external location: c:\local\linaro49\gcc-linaro-4.9-2016.02-i686-mingw32_arm-linux-gnueabihf\arm-linux-gnueabihf\bin\ld.exe:c:\local\linaro49\gcc-linaro-4.9-2016.02-i686-mingw32_arm-linux-gnueabihf\arm-linux-gnueabihf\libc\lib\libc.so.6 C/C++ Problem

The Console window shows: 

17:25:06 **** Build of configuration Debug for project HW621 ****
make all
'Building file: ../src/HW621.c'
'Invoking: GCC C Compiler 4.9.4 [arm-linux-gnueabihf]'
arm-linux-gnueabihf-gcc.exe -O0 -g -Wall -c -fmessage-length=0 -MMD -MP -MF"src/HW621.d" -MT"src/HW621.o" -o "src/HW621.o" "../src/HW621.c"
'Finished building: ../src/HW621.c'
' '
'Building target: HW621'
'Invoking: GCC C Linker 4.9.4 [arm-linux-gnueabihf]'
arm-linux-gnueabihf-gcc.exe -o "HW621" ./src/HW621.o
c:/local/linaro49/gcc-linaro-4.9-2016.02-i686-mingw32_arm-linux-gnueabihf/bin/../lib/gcc/arm-linux-gnueabihf/4.9.4/../../../../arm-linux-gnueabihf/bin/ld.exe:c:\local\linaro49\gcc-linaro-4.9-2016.02-i686-mingw32_arm-linux-gnueabihf\bin\../arm-linux-gnueabihf/libc/lib/libc.so.6: file format not recognized; treating as linker script
c:/local/linaro49/gcc-linaro-4.9-2016.02-i686-mingw32_arm-linux-gnueabihf/bin/../lib/gcc/arm-linux-gnueabihf/4.9.4/../../../../arm-linux-gnueabihf/bin/ld.exe:c:\local\linaro49\gcc-linaro-4.9-2016.02-i686-mingw32_arm-linux-gnueabihf\bin\../arm-linux-gnueabihf/libc/lib/libc.so.6:1: syntax error
collect2.exe: error: ld returned 1 exit status
make: *** [HW621] Error 1
makefile:30: recipe for target 'HW621' failed

17:25:08 Build Finished (took 2s.44ms)

PLEASE can someone help me? I've hacked around this for three or four days, installing and uninstalling DS-5 and various toolchains. I've fiddled with my PATH variables, installed GNU make in a directory at the front of the PATH (to hide the make program associated with Delphi7 that was already there), etc. I'm stuck!

Thanks,

Richard