Here we discuss about the variables/Macro use to make tool chains
1.SRCDIR:- This directory home all sources downloaded.
e.g.
export SRCDIR=/root/chaine/sources
2.BULIDDIR:- It is in this directory that will compile all source packages e.g.
export BUILDDIR=/root/chaine/build
3.TARGETMACH:-
This variable specifies the type of target architecture
e.g.
export TARGETMACH=arm-none-linux-gnueabi
4.BUILDMACH:-
This variable specifies the type of architecture in which the package is compiled.
export BUILDMACH=x86_64-pc-linux-gnu
5.INSTALLDIR
This variable provides information about the folder hosting the cross-toolchain.
export INSTALLDIR=/opt/arm
6.SYSROOTDIR :-
This variable provides information on the directory hosting the libraries and header files the kernel of the target system.e.g.
export SYSROOTDIR=/opt/arm/sysroot
7.CROSS:-
Indicates that we use the variable fields CROSS with arm-none-linux-gnueabi.
export CROSS=arm-none-linux-gnueabi
