On 2012-Sep-04 23:50:35 +0200, Dimitry Andric <d...@freebsd.org> wrote: >There's a difference between just using '-g', which should never change >the behaviour of the program at runtime, and adding -DDEBUG or similar >flags on the command line, which may or may not enable extra code, or >even cause totally different code paths.
In theory, gcc should generate identical code with and without '-g' but, last time I looked, adding '-g' causes non-trivial changes in the gcc code paths so it's quite possible that different code is emitted. >What is not different, is that both -g and other debugging options will >generally cause compiling and linking to take longer, since these stages >will have to process the additional debug information. As well as being much larger - several times larger is not uncommon. This further slows things down due to the additional I/O and reduced cache effectiveness. -- Peter Jeremy
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