lfs-book-zh_CN/chapter06/gcc-2953-inst.xml

<sect2><title>&nbsp;</title><para>&nbsp;</para></sect2>

<sect2>
<title>Installation of GCC</title>

<para>This package is known to behave badly when you have changed its
default optimization flags (including the -march and -mcpu options).
Therefore, if you have defined any environment variables that override
default optimizations, such as CFLAGS and CXXFLAGS, we recommend unsetting
or modifying them when building GCC.</para>

<para><screen><userinput>patch -Np1 -i ../gcc-2.95.3-2.patch
echo timestamp > gcc/cstamp-h.in
mkdir ../gcc-2-build
cd ../gcc-2-build
../gcc-2.95.3/configure --prefix=/opt/gcc-2.95.3 \
&nbsp;&nbsp;&nbsp;&nbsp;--enable-shared --enable-languages=c,c++ \
&nbsp;&nbsp;&nbsp;&nbsp;--enable-threads=posix
make bootstrap
make install</userinput></screen></para>

<para>Add the compiler's library directory to <filename>ld.so.conf</filename>,
so these libraries can be found at run time:</para>

<para><screen><userinput>echo "/opt/gcc-2.95.3/lib" >> /etc/ld.so.conf
ldconfig</userinput></screen></para>

</sect2>