Hi! I am trying to use the OpenMP to Intel MIC target, but I have a some problems: 1. The offload compiler contains only gcc binary: [ikulagin@cnmic1 gcc-6.2.0]$ ls -l offload-x86_64-intelmic-linux-gnu/bin/ total 4424 -rwxr-xr-x 1 ikulagin ikulagin 4529723 Dec 27 04:04 gcc 2. The host compiler cannot find to mkoffload: [ikulagin@cnmic1 ~]$ gcc -Wall -fopenmp ./1.c lto-wrapper: fatal error: problem with building target image for x86_64-intelmic-linux-gnu compilation terminated. /usr/bin/ld: lto-wrapper failed collect2: error: ld returned 1 exit status I have installed gcc from gcc-6_2_0-release tag (6ac74a6 commit). The offload compiler: [ikulagin@cnmic1 bin]$ ./gcc -v Using built-in specs. COLLECT_GCC=./gcc COLLECT_LTO_WRAPPER=/home/ikulagin/workspace/compilers/gcc-6.2.0/offload-x86_64-intelmic-linux-gnu/bin/../libexec/gcc/x86_64-pc-linux-gnu/6.2.0/accel/x86_64-intelmic-linux-gnu/lto-wrapper Target: x86_64-intelmic-linux-gnu Configured with: ../configure --prefix= --build=x86_64-intelmic-linux-gnu --host=x86_64-intelmic-linux-gnu --target=x86_64-intelmic-linux-gnu --enable-as-accelerator-for=x86_64-pc-linux-gnu --enable-languages=c,c++,fortran,lto Thread model: posix gcc version 6.2.0 (GCC) The offload compiler has installed to DESTDIR=/home/ikulagin/workspace/compilers/gcc-6.2.0/offload-x86_64-intelmic-linux-gnu. The offload compiler path is specified for host compiler by configure parameter: --enable-offload-targets=x86_64-intelmic-linux-gnu=/home/ikulagin/workspace/compilers/gcc-6.2.0/offload-x86_64-intelmic-linux-gnu/ The host compiler has installed to DESTDIR=/home/ikulagin/workspace/compilers/gcc-6.2.0/ and configured in the following way: [ikulagin@cnmic1 bin]$ gcc -v Using built-in specs. COLLECT_GCC=gcc COLLECT_LTO_WRAPPER=/home/ikulagin/workspace/compilers/gcc-6.2.0/bin/../libexec/gcc/x86_64-pc-linux-gnu/6.2.0/lto-wrapper OFFLOAD_TARGET_NAMES=x86_64-intelmic-linux-gnu Target: x86_64-pc-linux-gnu Configured with: ../configure --prefix= --enable-languages=c,c++,fortran,lto --build=x86_64-pc-linux-gnu --host=x86_64-pc-linux-gnu --target=x86_64-pc-linux-gnu --enable-offload-targets=x86_64-intelmic-linux-gnu=/home/ikulagin/workspace/compilers/gcc-6.2.0/offload-x86_64-intelmic-linux-gnu/ Thread model: posix gcc version 6.2.0 (GCC) It is seems like host compiler doesn't know about location the offload compiler, maybe the option “ --enable-offload-targets=x86_64-intelmic-linux-gnu=/home/ikulagin/workspace/compilers/gcc-6.2.0/offload-x86_64-intelmic-linux-gnu/” doesn’t work? Moreover, I have tried create symlink to needed directory for the offload compiler (to OFFLOAD_INSTALL_DIR/libexec/gcc/x86_64-pc-linux-gnu/6.2.0/accel/): ln -s /home/ikulagin/workspace/compilers/gcc-6.2.0/offload-x86_64-intelmic-linux-gnu/libexec/gcc/x86_64-pc-linux-gnu/6.2.0/accel/ /home/ikulagin/workspace/compilers/gcc-6.2.0/libexec/gcc/x86_64-pc-linux-gnu/6.2.0/ In this case the offload compiler found the mkoffload, but mkoffload-intelmic runs the host gcc unless the offload gcc, as result: [ikulagin@cnmic1 ~]$ gcc -Wall -fopenmp ./1.c lto1: error: -foffload-abi option can be specified only for offload compiler mkoffload-intelmic: fatal error: gcc returned 1 exit status compilation terminated. lto-wrapper: fatal error: /home/ikulagin/workspace/compilers/gcc-6.2.0/bin/../libexec/gcc/x86_64-pc-linux-gnu/6.2.0//accel/x86_64-intelmic-linux-gnu/mkoffload returned 1 exit status compilation terminated. /usr/bin/ld: lto-wrapper failed collect2: error: ld returned 1 exit status Then I run gcc in gdb (gcc -wrapper gdb,--args -Wall -fopenmp ./1.c) and I had seen there are no environment variables that contain path to the offload compiler. Could you help me please, what i need to do? I am sorry for absolute paths in examples, maybe it will be helpful. :) -Ivan Kulagin
