Re: Denemo

[Richard Shann]

On Sat, 2020-06-27 at 15:47 -0400, Eddy wrote:
> > That's to say
> > ./configure CFLAGS="-02"
> > creates a Denemo binary that crashes on startup while
> > ./configure CFLAGS="-00"
> > gives one that does not crash?
> 
> That's correct.
> 
> > Out of curiosity what does -O1 do?
> 
> It produces a working binary.
> 
> I tried to track down a list of the compiler optimizations that -O2
> enables that -O1 doesn't,
well, life is probably too short for that :), with reputable compilers
it is much more common to find that the bug is in the C-code being
compiled rather than the compiler's optimizer but in this case the
Denemo code at exportlilypond.c:3518 seems to be rock solid, so perhaps
it is something in the GtkSourceView library function being called that
is triggering the error.
Workaround is obvious - as I say I've not noticed it affect the
performance...

Thanks for the investigations,

Richard



>  but I can't seem to find that list for the
> compiler I'm using:
> 
>       Configured with: --
> prefix=/Applications/Xcode.app/Contents/Developer/usr --with-gxx-
> include-dir=/usr/include/c++/4.2.1
>       Apple LLVM version 9.1.0 (clang-902.0.39.2)
>       Target: x86_64-apple-darwin17.7.0
>       Thread model: posix
>       InstalledDir:
> /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xc
> toolchain/usr/bin
> 
> Eddy
> 
> 
> 
>