[Solved] compile flag --enable-no_rtti

[aus9]

Hi

I am aware of the wiki for TCE creation and the flags used for TC64. I came across this flag for a bit of software. configure --help

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--enable-no_rtti   Enable compilation without creation of C++ RTTI information in object files.
                            This will speed-up compilation and reduce binary size.
The reduction interests me. Any problems if I enable it in a build?

[Rich]

Hi aus9

If you wish to try to get a lower sized C++ app, you can try adding "-fno-exceptions -fno-rtti" to CXXFLAGS. Use only on C++ applications, libraries should use the same flags as in CFLAGS above.

Found here:
http://wiki.tinycorelinux.net/doku.php?id=wiki:creating_extensions#installing

[aus9]

trust me to use the wrong term.

I am aware of the TC64 normal flags

export CFLAGS="-mtune=generic -Os -pipe"
export CXXFLAGS="-mtune=generic -Os -pipe"
export LDFLAGS="-Wl,-O1"

what I should have said in subject was configure option. its a configure option that I have never seen before.

eg

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./configure --prefix=/usr/local --enable-no_rtti
anyhow all I can do it test the size by rebuilding it and checking unsquashed on disk size,
I am interested because the resultant exe is huge. I have not compared .so files yet.

anyhow I shall try 4 permutations to see whats what.

export CFLAGS="-mtune=generic -Os -pipe"
export CXXFLAGS="-mtune=generic -Os -pipe -fno-exceptions -fno-rtti"
export LDFLAGS="-Wl,-O1"

with and without that configure option.

anyhow
@Rich please mark as solved.

[Rich]

Hi aus9
Most likely

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./configure --enable-no_rttijust adds  -fno-rtti  to  CXXFLAGS.

... @Rich please mark as solved.

So marked.