building for the iPhone

[tcurdt@xxxxxxxxx (Torsten Curdt)]

Hey folks,

while I managed to compile latest trunk for the iPhone at least once,
I am back having trouble reproducing it.

Unfortunately I am not exactly a pro with GNU build chain ...but maybe
just let's get started. I started out with the following build script:

    #!/bin/sh

    set -e

    export SDKVERSION=3.1.2
    export DEVROOT=/Developer/Platforms/iPhoneOS.platform/Developer
    export SDKROOT=$DEVROOT/SDKs/iPhoneOS${SDKVERSION}.sdk

    export RANLIB=$DEVROOT/usr/bin/ranlib
    export AR=$DEVROOT/usr/bin/ar
    export CC=$DEVROOT/usr/bin/gcc
    export CPP=$DEVROOT/usr/bin/cpp

    export LDFLAGS="-arch armv6 -O2 -isysroot $SDKROOT -L$SDKROOT/usr/lib"
    export CFLAGS="-arch armv6 -O2 -isysroot $SDKROOT -I$SDKROOT/usr/include"

    export PATH=${DEVROOT}/usr/bin:${PATH}

    ./configure --host=arm-apple-darwin9 --prefix=$SDKROOT \
     --disable-ssl \
     --disable-speex-aec \
     --disable-speex-codec \
     --disable-l16-codec \
     --disable-g722-codec \
     --disable-ilbc-codec \
     --enable-gsm-codec \
     --disable-sound

    make dep
    make

Running this shows that it is looking for a gcc that is missing:
"/bin/sh: arm-apple-darwin9-gcc: command not found". Looking at the
SDK bin directory one can find:

    ar
    arm-apple-darwin9-g++-4.0.1
    arm-apple-darwin9-g++-4.2.1
    arm-apple-darwin9-gcc-4.0.1
    arm-apple-darwin9-gcc-4.2.1
    as
    c++ -> c++-4.2
    c++-4.0
    c++-4.2
    c89
    c99
    cc -> gcc-4.2
    cmpdylib
    codesign_allocate
    cpp
    cpp-4.0
    cpp-4.2
    csent
    dyldinfo
    g++ -> g++-4.2
    g++-4.0
    g++-4.2
    gcc -> gcc-4.2
    gcc-4.0
    gcc-4.2
    gcov -> gcov-4.2
    gcov-4.0
    gcov-4.2
    gdb
    gprof
    i686-apple-darwin9-g++-4.2.1
    i686-apple-darwin9-gcc-4.2.1
    install_name_tool
    iphoneos-optimize
    ld
    ld_classic
    libtool
    lipo
    nm
    nmedit
    otool
    pagestuff
    pngcrush
    powerpc-apple-darwin9-g++-4.2.1
    powerpc-apple-darwin9-gcc-4.2.1
    ranlib -> libtool
    rebase
    redo_prebinding
    segedit
    size
    strings
    strip
    texturetool
    unwinddump

So I've create a symlink in
/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin

 ln -s arm-apple-darwin9-gcc-4.2.1 arm-apple-darwin9-gcc

...which makes it run through until one hits:

    arm-apple-darwin9-gcc -c -Wall  -DPJ_AUTOCONF=1 -arch armv6 -O2
-isysroot /Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS3.1.2.sdk
-I/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS3.1.2.sdk/usr/include
  -arch armv6 -O2 -isysroot
/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS3.1.2.sdk
-I/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS3.1.2.sdk/usr/include
-I../include \
    		-o output/pjlib-arm-apple-darwin9/ioqueue_select.o \
    		../src/pj/ioqueue_select.c
    cc1: error: unrecognized command line option "-arch"

Which is a little odd because that binary seems/should support the
"-arch" option.

    $ ./i686-apple-darwin9-gcc-4.2.1 -arch
    i686-apple-darwin9-gcc-4.2.1: argument to '-arch' is missing
    $ ./i686-apple-darwin9-gcc-4.2.1 -arch i386
    i686-apple-darwin9-gcc-4.2.1: no input files

Odd. Trying gcc 4.0.1 instead:

    ln -sf arm-apple-darwin9-gcc-4.0.1 arm-apple-darwin9-gcc

Which gets much further

    make[2]: arm-apple-darwin9-ar: No such file or directory

Hm ... why isn't it using the AR specified? Creating another link:

    ln -s ar arm-apple-darwin9-ar

Which then gets stuck at

    make[2]: arm-apple-darwin9-ranlib: No such file or directory

Another link:

    ln -s ranlib arm-apple-darwin9-ranlib

which now it ends with

    /Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/ranlib:
file: ../lib/libpj-arm-apple-darwin9.a(pool_dbg.o) has no symbols
    /Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/ranlib:
file: ../lib/libpj-arm-apple-darwin9.a(ssl_sock_ossl.o) has no symbols
    arm-apple-darwin9-ranlib ../lib/libpj-arm-apple-darwin9.a
    arm-apple-darwin9-ranlib: no output file specified (specify with -o output)
    Usage: arm-apple-darwin9-ranlib -static [-] file [...] [-filelist
listfile[,dirname]] [-arch_only arch] [-sacLT]
    Usage: arm-apple-darwin9-ranlib -dynamic [-] file [...] [-filelist
listfile[,dirname]] [-arch_only arch] [-o output] [-install_name name]
[-compatibility_version #] [-current_version #] [-seg1addr 0x#]
[-segs_read_only_addr 0x#] [-segs_read_write_addr 0x#]
[-seg_addr_table <filename>] [-seg_addr_table_filename
<file_system_path>] [-all_load] [-noall_load]


No output files? Why? Seems also it's missing the "-static" option.

Now I am little stuck because I got this working once with GCC 4.0.
Not sure what I was doing differently.

In general it would be great to get this building a bit more out-of-the-box.

Any pointers appreciated.

cheers
--
Torsten