A complete bootstrap build is done by issuing a command
beginning with `make bootstrap ...', as
described in section `Installing GNU CC' in Using and Porting GNU CC.
This is the most reliable form of build, but it does require
the most disk space and CPU time, since the complete system
is built twice (in Stages 2 and 3), after an initial build
(during Stage 1) of a minimal gcc compiler using
the native compiler and libraries.
You might have to, or want to, control the way a bootstrap
build is done by entering the make commands to build
each stage one at a time, as described in the gcc
manual.
For example, to save time or disk space, you might want
to not bother doing the Stage 3 build, in which case you
are assuming that the gcc compiler you have built
is basically sound (because you are giving up the opportunity
to compare a large number of object files to ensure they're
identical).
To save some disk space during installation, after Stage 2 is built, you can type `rm -fr stage1' to remove the binaries built during Stage 1.
Also, See section `Installing GNU CC' in Using and Porting GNU CC,
for important information on building gcc that is
not described in this g77 manual.
For example, explanations of diagnostic messages
and whether they're expected, or indicate trouble,
are found there.
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