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Update documentation suggestions for debugging the backend.

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Tom Lane, with minor adjustments by me.
This commit is contained in:
Bruce Momjian 2011-12-02 17:08:33 -05:00
parent b6f9834a9e
commit 155e56bd97
1 changed files with 17 additions and 4 deletions
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21
doc/src/sgml/installation.sgml
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@ -1415,10 +1415,23 @@ su - postgres
<note> <note>
<para> <para>
Server developers should consider using the configure options When developing code inside the server, it is recommended to
<option>--enable-cassert</> and <option>--enable-debug</> to enhance the use the configure options <option>--enable-cassert</> (which
ability to detect and debug server errors. Your debugger might turns on many run-time error checks) and <option>--enable-debug</>
also require specific compiler flags to produce useful output. (which improves the usefulness of debugging tools).
</para>
<para>
If using GCC, it is best to build with an optimization level of
at least <option>-O1</>, because using no optimization
(<option>-O0</>) disables some important compiler warnings (such
as the use of uninitialized variables). However, non-zero
optimization levels can complicate debugging because stepping
through compiled code will usually not match up one-to-one with
source code lines. If you get confused while trying to debug
optimized code, recompile the specific files of interest with
<option>-O0</>. An easy way to do this is by passing an option
to <application>make</>: <command>gmake PROFILE=-O0 file.o</>.
</para> </para>
</note> </note>
</step> </step>