On Thu, 2019-11-07 at 21:37 +0000, Jozef Lawrynowicz wrote: > The code size bloat added by building C++ programs using libraries containing > support for exceptions is significant. When using simple constructs such as > static variables, sometimes many kB from the libraries are unnecessarily > pulled in. > > So this patch disable exceptions by default for MSP430 when compiling for C++, > by implicitly passing -fno-exceptions unless -fexceptions is passed.
It is extremely annoying when GCC's default standard behavior differs across different targets. And as a consequence, you have to add a load of workarounds and disable other things, like fiddling with the testsuite. It's the same thing as setting "double = float" to get more "speed" by default. I would strongly advice against making such non-standard behaviors the default in the vanilla compiler. C++ normally has exceptions enabled. If a user doesn't want them and is willing to deal with it all the consequences, then we already have a mechanism to do that: --fno-exceptions Perhaps it's generally more useful to add a global configure option for GCC to disable exception handling by default. Then you can provide a turn-key toolchain to your customers as well -- just add an option to the configure line. Cheers, Oleg
