Can't load component compiled with GeckoSDK1.8 in FF3(Linux)

[Crazy-EyE]

I've compiled my XPCOM component using Gecko SDK 1.8.0.4 in Linux. It works in Firefox 2 (tested in 2.0.0.12, if it matters) but doesn't load into Firefox 3 (3.0.1).

I compile my component with the following command:

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c++ -Wall -Os -o MyComponent.so `pkg-config --cflags --libs gtk+-2.0` -LXlib -include mozilla-config.h  -DXPCOM_GLUE  -I~/gecko-sdk/include  -L~/gecko-sdk/lib -L~/gecko-sdk/bin -Wl,-rpath-link,~/gecko-sdk/bin -lxpcomglue_s -lxpcom -lnspr4 -fno-rtti -fno-exceptions -shared    MyComponent.cpp ../../components/MyComponentModule.cpp

I tried to run

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~/firefox-3.0/run-mozilla.sh `which ldd` -r MyComponent.so

and got

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...
undefined symbol: _Z20NS_NewGenericModule2PK12nsModuleInfoPP9nsIModule  (MyComponent.so)

When I compile with -DDEBUG I get more:

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...
undefined symbol: NSGlue_Warning        (MyComponent.so)
undefined symbol: NSGlue_Assertion      (MyComponent.so)
undefined symbol: _ZN13nsTraceRefcnt10LogReleaseEPvjPKc (MyComponent.so)
undefined symbol: _ZN13nsTraceRefcnt9LogAddRefEPvjPKcj  (MyComponent.so)
undefined symbol: _Z20NS_NewGenericModule2PK12nsModuleInfoPP9nsIModule  (MyComponent.so)

As I understand component compiled with Gecko SDK 1.8 with frozen linkage should work in 1.8+. In Windows similar component works both in FF2 and FF3 but in Linux I can't load my component into FF3. I don't want to use Geck SDK 1.9 because (again, as I understand) it will break compatibility of my component with FF2.

Can anybody help me with this? Thank you.

[Torisugari]

Can you compile it with

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-UMOZILLA_INTERNAL_API

?

[Crazy-EyE]

I can compile it both with this flag and without. But results are the same: resulting dynamic library loads in Firefox 2 but doesn't load in Firefox 3.

[zuo3diao]

Eeee,I use Ubuntu8.04 linux to develop xpcom .My env is xulrunner -devel 1.9.0.1 , which include the Gecko SDK 1.9.

A simple example runs on FF3.01 very fun.,but the other xpcom has problem.

Its interface can be detected by xpcomViewer ,and the class (like CID "@XXX.com/XXX;1")isn't found .The Error Console shows "cannot load XXX.so" when use "firefox test.html".I use ff's file menu open the test.html, Error Console isn't show any message........

need some help !!

[Crazy-EyE]

Its interface can be detected by xpcomViewer ,and the class (like CID "@XXX.com/XXX;1")isn't found .The Error Console shows "cannot load XXX.so" when use "firefox test.html".

It means that your xpt file (with interface) if ok but your dynamic library isn't. Possibly it had been ok too and only then became broken so it is registered in compreg.dat but Firefox can't load it. Think if you delete your compreg.dat it will not register it again.

Also Troubleshooting XPCOM components registration may be helpful for you.

[Crazy-EyE]

I've changed order of input files (my files and libraries) and now it works well both in FF2 and FF3:

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c++ -Wall -Os -o MyComponent.so `pkg-config --cflags --libs gtk+-2.0` -LXlib -include mozilla-config.h  -DXPCOM_GLUE  -I~/gecko-sdk/include  -L~/gecko-sdk/lib -L~/gecko-sdk/bin -Wl,-rpath-link,~/gecko-sdk/bin -fno-rtti -fno-exceptions -shared MyComponent.cpp ../../components/MyComponentModule.cpp -lxpcomglue_s -lxpcom -lnspr4

[zuo3diao]

ok
I got the reason, because some so files have not linked in share object .
use "ldd -r" to check it .