Limiting code size with -g2 with c++ template lib

[Benoît Jacob <jacob at math dot jussieu dot fr>]

Hi List,

I am developing a C++ pure-template-library, with a lot of meta-programming 
(expression templates).

With the default debugging level (-g2), the produced executable has a huge 
size. Like, 300 kb for a simple program.

With -g1, the executable size is much more reasonable -- less than 150% of the 
size obtained with -g0.

I believe that the main difference between -g1 and -g2 is that -g2 enables 
source-code-line-number information. Also, "nm" tells me that there are very 
few symbols (function names) in my executables.

I would like to do either of the following:

1) tell gcc to only emit line-number info for these lines of code that 
actually produce code in the executable, after optimization.

2) tell gcc to just not emit any line-number info for the code inside my 
template lib. Something like (I know that Pragma doesn't exist!):
_Pragma("dont_emit_line_number_info");
#include<MyTemplateLib/Headers>
_Pragma("end_of_dont_emit_line_number_info");

Is any of that possible? Do you see anything else that might help limit the 
size of code generated by -g2?

Of course the users of my lib want to use -g2 not -g1 when compiling their own 
app!

Thanks a lot in advance for any help,

Benoit

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