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Posted: **Tue Nov 24, 2020 5:11 pm**

Hello.
I'm having some trouble building Bochs on Ubuntu/WSL2.
Here's my current command line:

./configure --enable-plugins --enable-usb-xhci --enable-usb --enable-gameport --enable-iodebug
make -j8
echo We are not installing because we already have the apt bochs package. Leave it in its folder.

Do note that I do have the regular apt bochs package with everything working in that.

The reason I need to build it is actually to see how bochs handles USB calls. I added a little debug line at usb_xhci.cc:3037

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  BX_DEBUG(("Broadcast Packet"));

but when I build it it gives this error:

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00000000000i[      ] LTDL_LIBRARY_PATH not set. using compile time default '/usr/local/lib/bochs/plugins'
00000000000i[      ] BXSHARE not set. using compile time default '/usr/local/share/bochs'
00000000000i[      ] lt_dlhandle is (nil)
00000000000p[      ] >>PANIC<< dlopen failed for module 'unmapped' (libbx_unmapped.so): file not found
00000000000e[SIM   ] notify called, but no bxevent_callback function is registered
00000000000e[SIM   ] notify called, but no bxevent_callback function is registered
========================================================================
Bochs is exiting with the following message:
[      ] dlopen failed for module 'unmapped' (libbx_unmapped.so): file not found

What should I do so that it compiles correctly? All I really need is the compile arguments for the apt bochs package.

Posted: **Tue Nov 24, 2020 5:27 pm**

Well, I might have just found my answer literally 10 minutes after I posted the question.
I ran apt's version of bochs and it said this at the start:

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00000000000i[      ] LTDL_LIBRARY_PATH not set. using compile time default '/usr/lib/bochs/plugins'
00000000000i[      ] BXSHARE not set. using compile time default '/usr/share/bochs'

but my custom-built one says

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00000000000i[      ] LTDL_LIBRARY_PATH not set. using compile time default '/usr/local/lib/bochs/plugins'
00000000000i[      ] BXSHARE not set. using compile time default '/usr/local/share/bochs'

EDIT:
Well, it got a little farther, but failed with this error:

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>>PANIC<< dlopen failed for module 'speaker' (libbx_speaker.so): /usr/lib/bochs/plugins/libbx_speaker.so: undefined symbol: bx_soundmod_ctl

EDIT 2:
Well, I decided to change the prefix to /opt/bochs and actually run make install and voila it works now.

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./configure --prefix="/opt/bochs" --enable-plugins --enable-usb-xhci --enable-usb --enable-debugger --enable-iodebug
make -j8
sudo make install

I didn't realize that make install was required. I thought it was optional.

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