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NAME="COMPILING-CPP-APP">Compiling a C++ Application</H1
><P
>The following command lines demonstrate the
<SPAN
CLASS="emphasis"
><I
CLASS="EMPHASIS"
>minimum</I
></SPAN
> set of options required to
compile and link an <SPAN
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>eCos</SPAN
> program written in C++.
</P
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><B
>Note: </B
>Remember that when this manual shows
<B
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>g++</B
>
you should use the full name of the cross compiler,
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CLASS="COMMAND"
>i386-elf-g++</B
>,
<B
CLASS="COMMAND"
>arm-elf-g++</B
>, or
<B
CLASS="COMMAND"
>sh-elf-g++</B
>. When compiling for the
synthetic Linux target, use the native
<B
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>g++</B
> which must have the features
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>$ <TT
CLASS="REPLACEABLE"
><I
>TARGET-</I
></TT
>g++ -c -I<TT
CLASS="REPLACEABLE"
><I
>INSTALL_DIR</I
></TT
>/include -fno-rtti -fno-exceptions file.cxx
$ <TT
CLASS="REPLACEABLE"
><I
>TARGET-</I
></TT
>g++ -o program file.o -L<TT
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><I
>INSTALL_DIR</I
></TT
>/lib -Ttarget.ld -nostdlib</PRE
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><B
>Note: </B
>Certain targets may require extra options,
for example the SPARClite architectures require the option
<TT
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>. Examine the
<TT
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>
file or <TT
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>/examples/Makefile</TT
>
or the “Global compiler flags” option
(CYGBLD_GLOBAL_CFLAGS) in your generated
<SPAN
CLASS="PRODUCTNAME"
>eCos</SPAN
> configuration) to see if any extra options are
required, and if so, what they are.</P
><P
>The following command lines use some other options
which are recommended because they use the
<I
CLASS="FIRSTTERM"
>selective linking</I
> feature:</P
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>$ <TT
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><I
>TARGET-</I
></TT
>g++ -c -I<TT
CLASS="REPLACEABLE"
><I
>INSTALL_DIR</I
></TT
>/include -I. -ffunction-sections -fdata-sections -fno-rtti \
-fno-exceptions -finit-priority -g -O2 file.cxx
$ <TT
CLASS="REPLACEABLE"
><I
>TARGET-</I
></TT
>g++ -o program file.o -W1,--gc-sections -g -O2 -L<TT
CLASS="REPLACEABLE"
><I
>INSTALL_DIR</I
></TT
>/lib -Ttarget.ld -nostdlib</PRE
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