asterisk users - Aug 2012 - app_swift 3 and asterisk 1.8.13.0 fails with undefined symbol: swift_port_close

All,

I am experiencing this same issue.  it seems that you were able to resolve
it offline.  Could you by any chance post the solution.

telephonics1*CLI> module load app_swift.so
Unable to load module app_swift.so
Command 'module load app_swift.so' failed.
[Aug  1 05:01:01] WARNING[28635]: loader.c:458 load_dynamic_module: Error
loading module 'app_swift.so': /usr/lib/asterisk/modules/app_swift.so:
undefined symbol: swift_port_close
[Aug  1 05:01:01] WARNING[28635]: loader.c:848 load_resource: Module
'app_swift.so' could not be loaded.
telephonics1*CLI>

I suspect an issue when linking app_swift.so.  Here is how the module is
linked:

gcc -shared -Xlinker -x -o app_swift.so -L/opt/swift/lib -L/usr/lib -lswift
-lceplang_en -lceplex_us app_swift.o

However, ldd shows the module doesn't list libswift.so as a dependency:

# ldd app_swift.so
linux-vdso.so.1 =>  (0x00007fff2bbff000)
libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f7cb005e000)
/lib64/ld-linux-x86-64.so.2 (0x00007f7cb0631000)

It appears the libswift.so is build correctly and does export the
swift_port_close function:

# readelf -s libswift.so | grep port_close
   619: 000000000006ac00    23 FUNC    GLOBAL DEFAULT   10
swift_port_close_output
   941: 000000000006aec0   224 FUNC    GLOBAL DEFAULT   10 swift_port_close
  1025: 000000000006aec0   224 FUNC    GLOBAL DEFAULT   10 swift_port_close
  2082: 000000000006ac00    23 FUNC    GLOBAL DEFAULT   10
swift_port_close_output

Any help would be appreciated.

Thanks,
Doug Seifert
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Solving my own issue:  The order of linking was incorrect.

Change the Makefile as follows to solve this issue.


diff --git a/Makefile b/Makefile
index dec892d..90d79df 100644
--- a/Makefile
+++ b/Makefile
@@ -73,7 +73,7 @@ all: banner $(AST_INC_CHECK) $(AST_VER_CHECK)
        @echo ""

 $(NAME).so : $(NAME).o
-       $(CC) $(SOLINK) -o $@ $(LDFLAGS) $<
+       $(CC) $(SOLINK) -o $@ $< $(LDFLAGS)

 banner:
        @echo ""
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