Cross-Compiled Linux From Scratch - Embedded - Version SVN-0.0.1-20081108-x86

Chapter 6. Constructing Cross-Compile Tools

6.9. GCC-4.3.2 - Cross Compiler Final

The GCC package contains the GNU compiler collection, which includes the C and C++ compilers.

6.9.1. Installation of GCC Cross Compiler

To make sure that a couple of tools use the proper syntax, apply the following patch: 

patch -Np1 -i ../gcc-4.3.2-posix-1.patch

The GCC documentation recommends building GCC outside of the source directory in a dedicated build directory: 

mkdir -v ../gcc-build
cd ../gcc-build

Prepare GCC for compilation: 

../gcc-4.3.2/configure --prefix=${CLFS}/cross-tools \
    --target=${CLFS_TARGET} --disable-multilib \
    --with-sysroot=${CLFS} --disable-nls --enable-shared \
    --enable-languages=c --enable-__cxa_atexit \
    --enable-c99 --enable-long-long --enable-threads=posix

The meaning of the new configure options:

--enable-languages=c

This option ensures that only the C compiler is built. If the C++ compiler is needed, use --enable-languages=c,c++

--enable-__cxa_atexit

This option allows use of __cxa_atexit, rather than atexit, to register C++ destructors for local statics and global objects and is essential for fully standards-compliant handling of destructors. It also affects the C++ ABI and therefore results in C++ shared libraries and C++ programs that are interoperable with other Linux distributions.

--enable-c99

Enable C99 support for C programs.

--enable-long-long

Enables long long support in the compiler.

--enable-threads=posix

This enables C++ exception handling for multi-threaded code.

Continue with compiling the package: 

make

Install the package: 

make install

6.9.2. Contents of GCC

Installed programs: c++, cc (link to gcc), cpp, g++, gcc, gccbug, and gcov
Installed libraries: libgcc.a, libgcc_eh.a, libgcc_s.so, libmudflap.[a,so], libmudflapth.[a,so], libstdc++.[a,so], and libsupc++.a

Short Descriptions

cc

The C compiler

cpp

The C preprocessor; it is used by the compiler to expand the #include, #define, and similar statements in the source files

c++

The C++ compiler

g++

The C++ compiler

gcc

The C compiler

gccbug

A shell script used to help create useful bug reports

gcov

A coverage testing tool; it is used to analyze programs to determine where optimizations will have the most effect

libgcc

Contains run-time support for gcc

libmudflap

The libmudflap libraries are used by GCC for instrumenting pointer and array dereferencing operations.

libstdc++

The standard C++ library

libsupc++

Provides supporting routines for the C++ programming language