Judging from what I've found (e.g. http://gcc.1065356.n8.nabble.com/Problem-building-cross-compiler-for-AIX-6-1-td655374.html http://gcc.1065356.n8.nabble.com/problems-building-gcc-4-3-5-1-on-AIX-6-1-with-pthreads-td879969.html) I suspect the answer is "no", however both of the above threads are 4+ years old so something may have changed and I'd appreciate the opinion of someone more knowledgable than me. I'm attempting to build an AIX 6.1 cross compiler on Ubuntu 16.04 using gcc 5.4.0. I believe that the problem lies in binutils as I can build an object file on the Ubuntu machine and link it successfully on the AIX machine, e.g.: $ ld -lc -o hello /usr/ccs/lib/crt0.o hello.o $ ./hello Hello, world! But trying to build the executable on Ubuntu (linking with the AIX system libc.a) gives: root@oc5328343620:/tmp# gcc -L/cross-compiler/sysroot/lib -o hello hello.c /cross-compiler/sysroot/lib/libc.a: file not recognized: File format not recognized collect2: error: ld returned 1 exit status root@oc5328343620:/tmp# file -L /cross-compiler/sysroot/lib/libc.a /cross-compiler/sysroot/lib/libc.a: archive (big format) My environment is as follows: (Note that this is all being done using a Docker container, I don't imagine that that's relevant - I have successfully built a Solaris 11 SPARC cross compiler in a similar fashion - but am mentioning in case it is.) The AIX 6.1 system libraries and include files are under: /cross-compiler/sysroot I have the binutils-2.27 source and confgure the build with: ../binutils-2.27/configure --target=powerpc-ibm-aix6.1 --prefix=/cross-compiler \ -with-sysroot=/cross-compiler/sysroot make all; make install completes successfully, creating /cross-compiler/bin/powerpc-ibm-aix6.1-ld, etc. I have the gcc-5.4.0 source along with gmp-4.3.2, mpc-0.8.1 and mpfr-2.4.2 which are unpacked into gmp, mpc and mpfr directories respectively. ../gcc-5.4.0/configure --target=../binutils-2.27/configure --target=powerpc-ibm-aix6.1 \ -with-sysroot=/cross-compiler/sysroot --prefix=/cross-compiler \ --with-gnu-as --with-gnu-ld --disable-libgcj --enable-languages=c make all-gcc; make install-gcc completes successfully, creating /cross-compiler/bin/powerpc-ibm-aix6.1-gcc, etc. However: make all-target-libgcc fails with the following error: collect2: fatal error: libgcc.a: cannot open as COFF file compilation terminated. Thanks for any insights, Jon -- View this message in context: http://gcc.1065356.n8.nabble.com/Is-it-possible-to-build-a-cross-compiler-for-AIX-6-1-on-Ubuntu-tp1314232.html Sent from the gcc - Help mailing list archive at Nabble.com.