How to build x86 gnu gcc in mac os x

# build os making tools for max os x 10.11.5 (OS X El Capitan)

# target tools : binutils, gcc, nasm

reference url1 : http://nayuta.net/64비트_멀티코어_OS_원리와_구조/OS_X에서_개발환경_구축하기

reference url2 : http://macworld.hjsong.net/73

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// [1] install essential tools

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1. command line developer tools

$ xcode-select --install

2. homebrew

$ /usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"

3. wget

$ brew install wget

5. nasm

$ brew install nasm

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// [2] common build setting

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$ export TARGET=x86_64-pc-linux

$ export PREFIX=/Users/criny/Desktop/os_dev_tools/root

$ export PATH=$prefix/bin:$PATH

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// [3] binutils

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$ wget http://ftp.gnu.org/gnu/binutils/binutils-2.26.tar.gz

$ tar xf binutils-2.26.tar.gz

$ cd binutils-2.26

$ mkdir build

$ cd build

$ ../configure --target=$TARGET --prefix=$PREFIX --enable-64-bit-bfd --disable-shared --disable-nls

$ make configure-host

$ make LDFLAGS="-all-static" CFLAGS="-Wno-error=deprecated-declarations"

$ make install

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// [4] gcc

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$ wget http://ftp.gnu.org/gnu/gcc/gcc-6.1.0/gcc-6.1.0.tar.gz

$ tar xf gcc-6.1.0.tar.gz

$ cd gcc-6.1.0

$ ./contrib/download_prerequisites

$ mkdir build

$ cd build

$ ../configure --target=$TARGET --prefix=$PREFIX --disable-nls --enable-languages=c --without-headers --disable-shared --enable-multilib

$ make configure-host

$ make all-gcc

$ make install-gcc

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// [5] mount vdi image ext2/3/4

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1. vdi mounting tool

download "Paragon VMDK Mounter for Mac® OS X"

2. ext4 file system supporting tool

download "Paragon ExtFS for Mac® 10"

3. attach vdi

vdmutil attach -nomount kiwi.vdi

4. mount ext4 file system

diskutil mount -mountPoint /mnt/kiwi /dev/disk1s1

5. unmount ext4 file system

diskutil unmount /mnt/kiwi