Building Eglibc in the Cygwin VM

  1. Update C:\Cygwin\opt\crosstool\src\build_gcc_cross.sh :
    #!/bin/bash
    export TARGET=arm-linux-gnueabihf
    export PREFIX=/opt/crosstool/gcc-4.6.3-eglibc-2.13/$TARGET
    export PATH=$PATH:$PREFIX/bin
    
    cd /opt/crosstool/src/build-eglibc
    find . -delete
    BUILD_CC=gcc \
    CC=$PREFIX/bin/$TARGET-gcc \
    CXX=$PREFIX/bin/$TARGET-g++ \
    AR=$PREFIX/bin/$TARGET-ar \
    RANLIB=$PREFIX/bin/$TARGET-ranlib \
    MAKEINFO=: \
    ../eglibc-2.13/configure \
        --prefix=/usr \
        --with-headers=$PREFIX/usr/include \
        --build=i686-pc-cygwin \
        --host=$TARGET \
        --enable-kernel=3.0.0 \
        --disable-profile --without-gd \
        --without-cvs --enable-add-ons
    if [ "$?" -ne "0" ]; then
        echo "=== build script: failed to configure eglibc ==="
        exit 1
    fi
    make
    if [ "$?" -ne "0" ]; then
        echo "=== build script: failed to make eglibc ==="
        exit 1
    fi
    make install_root=$PREFIX install
    if [ "$?" -ne "0" ]; then
        echo "=== build script: failed to install eglibc ==="
        exit 1
    fi
    
    echo "=== build script: OK ==="
    
  2. You may need to reapply dos2unix to build_gcc_cross.sh if your text editor does not preserve DOS/Unix line endings.
  3. Run C:\Cygwin\opt\crosstool\src\build_gcc_cross.cmd and wait until it completes.
  4. If there are no errors, shudown Cygwin VM and make snapshot "SNAP-9".
  5. Replace TARGET=arm-linux-gnueabihf with TARGET=arm-linux-gnueabi and ../eglibc-2.13/configure with ../eglibc-2.13.noarmhf/configure in C:\Cygwin\opt\crosstool\src\build_gcc_cross.sh, then run C:\Cygwin\opt\crosstool\src\build_gcc_cross.cmd and wait until it completes.
  6. If there are no errors, shudown Cygwin VM and make snapshot "SNAP-10".

Notes:

  • Eglibc build will take a lot of time, 4-5 times more than binutils + gcc.
  • "--enable-kernel" sets minimum version of Linux kernel for this eglibc to run on. 3.0.0 should be good for Raspberry Pi.
  • "--prefix=/usr" is not dangerous and will not hurt your /usr in host system, unless you call "make install" in plain and wrong way. This is an old glibc/eglibc joke.
  • If you didn't apply eglibc--cross-cygwin.diff patch, you will get the following error during build:
    gcc rpc_parse.c -c -D_RPC_THREAD_SAFE_ -D_CROSS_RPCGEN_ \
    -o /opt/crosstool/src/build-eglibc/sunrpc/cross-rpc_parse.o -MD -MP -MF /opt/crosstool
    /src/build-eglibc/sunrpc/cross-rpc_parse.o.dt -MT /opt/crosstool/src/build-eglibc/sunrpc/cross-rpc_parse.o
    In file included from rpc_parse.c:39:
    rpc/types.h:73: error: syntax error before "u_char"
    rpc/types.h:73: warning: useless keyword or type name in empty declaration
    rpc/types.h:73: warning: empty declaration
    rpc/types.h:74: error: syntax error before "u_short"
    rpc/types.h:74: warning: useless keyword or type name in empty declaration
    rpc/types.h:74: warning: empty declaration
    rpc/types.h:75: error: syntax error before "u_int"
    rpc/types.h:75: warning: useless keyword or type name in empty declaration
    rpc/types.h:75: warning: empty declaration
    rpc/types.h:76: error: syntax error before "u_long"
    rpc/types.h:76: warning: useless keyword or type name in empty declaration
    rpc/types.h:76: warning: empty declaration
    rpc/types.h:77: error: parse error before "quad_t"
    rpc/types.h:77: warning: data definition has no type or storage class
    rpc/types.h:78: error: parse error before "u_quad_t"
    rpc/types.h:78: warning: data definition has no type or storage class
    rpc/types.h:79: error: parse error before "fsid_t"
    rpc/types.h:79: warning: data definition has no type or storage class
    rpc/types.h:83: error: syntax error before "daddr_t"
    rpc/types.h:83: warning: useless keyword or type name in empty declaration
    rpc/types.h:83: warning: empty declaration
    rpc/types.h:84: error: syntax error before "caddr_t"
    rpc/types.h:84: warning: useless keyword or type name in empty declaration
    rpc/types.h:84: warning: empty declaration
    make[2]: *** [/opt/crosstool/src/build-eglibc/sunrpc/cross-rpc_parse.o] Error 1
    make[2]: Leaving directory `/opt/crosstool/src/eglibc-2.13/sunrpc'
    make[1]: *** [sunrpc/others] Error 2
    make[1]: Leaving directory `/opt/crosstool/src/eglibc-2.13'
    make: *** [all] Error 2
  • Also you may get error message about various missing syscalls (__-prefixed) if you forgot to replace .oS with .oZ in makefiles (Cygwin case-insensitive filesystem).
  • "timezone" subsystem will fail "make install" phase if you forgot to apply eglibc--cross-cygwin.diff patch. It includes updated Makefile for "timezone" subsystem from eglibc-2.15. The rest of "timezone" files were not updated.
  • Some users report that make-3.82 can't build eglibc-2.13 and fails like this:
    sed: can't read libc.texinfo: No such file or directory
    make[2]: Entering directory `/opt/crosstool/src/eglibc-2.13/manual'
    Makefile:236: *** mixed implicit and normal rules. Stop.
    make[2]: Leaving directory `/opt/crosstool/src/eglibc-2.13/manual'
    make[1]: *** [manual/subdir_lib] Error 2
    make[1]: Leaving directory `/opt/crosstool/src/eglibc-2.13'
    make: *** [all] Error 2
    Revert to make-3.81 if you encountered this error.


>> Read next section or buy already prepared cross-compiler ($10) to save your time.