eCos User Guide
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# Compiling a C++ Application

The following command lines demonstrate the minimum set of options required to compile and link an eCos program written in C++.

> Note: Remember that when this manual shows `TARGET-`g++ you should use the full name of the cross compiler, e.g. i386-elf-g++, arm-elf-g++, or sh-elf-g++. When compiling for the synthetic Linux target, use the native g++ which must have the features required by eCos.

    $ TARGET-g++ -c  -IINSTALL_DIR/include -fno-rtti -fno-exceptions file.cxx
    $ TARGET-g++ -o program file.o -LINSTALL_DIR/lib -Ttarget.ld -nostdlib

> Note: Certain targets may require extra options, for example the SPARClite architectures require the option `-mcpu=sparclite`. Examine the ``BASE_DIR`/packages/targets` file or ``BASE_DIR`/examples/Makefile` or the “Global compiler flags” option (CYGBLD_GLOBAL_CFLAGS) in your generated eCos configuration) to see if any extra options are required, and if so, what they are.

> The following command lines use some other options which are recommended because they use the selective linking feature:

>     $ TARGET-g++ -c -IINSTALL_DIR/include -I. -ffunction-sections -fdata-sections -fno-rtti \
>               -fno-exceptions -finit-priority -g -O2 file.cxx
>     $ TARGET-g++ -o program file.o -W1,--gc-sections -g -O2 -LINSTALL_DIR/lib -Ttarget.ld  -nostdlib

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