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Re: first test

From: Bryce McKinlay <mckinlay at redhat dot com>
To: Alessandro Di Maria <adm at m42 dot ch>
Cc: java at gcc dot gnu dot org
Date: Wed, 14 Jul 2004 18:48:26 -0400
Subject: Re: first test
References: <22864BB1-D5DB-11D8-BF6D-000A95B958AA@m42.ch> <40F5A592.6040302@redhat.com> <F7748CB2-D5DF-11D8-BF6D-000A95B958AA@m42.ch>

Alessandro Di Maria wrote:

Configured with: /Volumes/Work/gcc/src/gcc-3.4.1/configure --prefix=/usr/local/gcc-3.4.1 --enable-shared --disable-checking --enable-languages=c,c++,java --enable-debug Thread model: posix gcc version 3.4.1
I'm new to GCJ, normally I develop only on Java and wanted to test GCJ.
So just for curiosity, what does -O0 and -O2 mean?

-O0 = no optimization. This is the default, it means your code builds faster and is easier to debug. -O2 means "optimize my code". It may take a little longer to build, but the result will typically run 2X or more faster.

Note that the libgcj library must be built with -O2 as well. configuring GCC with "--enable-debug" might disable this - I'm not sure.

Bryce

References:
- first test
  - From: Alessandro Di Maria
- Re: first test
  - From: Bryce McKinlay
- Re: first test
  - From: Alessandro Di Maria

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