glfs/general/prog/gcc/gcc-exp.xml

<sect2>
<title>Command explanations</title>

<para><command>PATH_HOLD=$PATH</command>: This command
stores your current path before it's modified so that it can be restored after
installation.</para>

<para><command>export PATH=/opt/gnat/bin:$PATH</command>: This
command allows the build to find
<application><acronym>GNAT</acronym></application>'s
<application>Ada</application> compiler to build
<application>Ada</application>.</para>

<para><command>touch treeprs.ads [es]info.h nmake.ad[bs]</command>:
This command creates necessary files for the
<application>Ada</application> build. This step
may be skipped if you don't want to compile the
<application>Ada</application> front end.</para>

<para><parameter>CC=/usr/bin/gcc</parameter>: This command works around the
new <envar>PATH</envar> which puts <application><acronym>GNAT</acronym>
</application>'s <command>gcc</command> as the primary compiler.</para>

<para><parameter>--enable-languages=c,c++,objc,f77,ada,java</parameter>: This command builds all available languages in the
<application><acronym>GCC</acronym></application> package.
You may modify this command to remove unwanted languages.</para>

<para><parameter>--enable-shared --enable-threads=posix
--enable-__cxa_atexit</parameter>: These commands are required to build
the <application>C++</application> libraries to published standards.</para>

<para><parameter>--enable-clocale=gnu</parameter>: This command is a
failsafe for incomplete locale data.</para>

<para><command>make gnatlib_and tools</command>: This command
completes the <application>Ada</application> build process. Skip this step if 
you have not enabled <application>Ada</application> as one of the languages.
</para>

</sect2>