capstan run fails on MacOS X + qemu

[asias]

asias@hj:capstan-example$ capstan run
Building capstan-example...
OSv v0.05-481-gc691623
terminate called after throwing an instance of 'std::runtime_error'
what(): bad elf header
Aborted

[backtrace]
0x3f16c5 <__gnu_cxx::__verbose_terminate_handler()+341>
0x726564616568 <???+1684104552>

[penberg]

@asias I hadn't noticed this issue before. OS X toolchain produces Mach-O executables that are of course not supported on OSv.

What do you think needs to be done for this issue?

[asias]

We can do cross-compile for this kind of simple application but it is hard for other more complex programs. Maybe we should print an error if user tries to build on non-linux platforms.

[penberg]

@asias How would Capstan know that you're building a native application? It's perfectly fine to build a Java application, for example, on OS X.

[asias]

How about checking when uploading files to osv image. If we find files like
below, we print a warning.

hello.so: Mach-O 64-bit dynamically linked shared library x86_64

On Wed, Sep 10, 2014 at 10:10 PM, Pekka Enberg notifications@github.com
wrote:

@asias https://github.com/asias How would Capstan know that you're
building a native application? It's perfectly fine to build a Java
application, for example, on OS X.

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Asias

[penberg]

@asias Yeah, makes sense. It should be pretty easy to detect non-ELF shared libraries.