Dear all, 
Hi, I'm new to libreoffice and its forum. I have a question but I am not sure 
where to ask. If this is the right place, here is the question :)


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Question:
I have successfully added a new dialog in Impress according to the steps in 
this tutorial - Development/Create new dialog in Impress - The Document 
Foundation Wiki. Now I wish to call functions in an external library in the 
dialog source file.
I have an external library libxxx containing some C++ header files and a .so 
file. I put the header files in include/ folder and .so file outside 
libreoffice directory. I include the header files of this library in dialog 
source files located in sd/source/ui/dlg. I rerun the autogen.sh with extra 
arguments, trying to let the build system know I have a .so library to link. 


./autogen.sh LDFLAGS=-L/path_to_libxxx LIBS=-lxxx


Then I rebuild the sd module using make sd, however, it seems the functions in 
.so library is not properly linked. 


"/usr/bin/ld: 
/home/jingze_xu/office/libreoffice-7.6.0.0.beta1/workdir/CxxObject/sd/source/ui/dlg/HelloDialog.o:
 in function `sd::SdHelloDialog::OKHdl(weld::Button&)':
HelloDialog.cxx:(.text+0x36c): undefined reference to 
`Add_FileHeader(std::__cxx11::basic_string<char, std::char_traits<char>, 
std::allocator<char> >, std::__cxx11::basic_string<char, 
std::char_traits<char>, std::allocator<char> >, unsigned short)'
collect2: error: ld returned 1 exit status
make[1]: *** 
[/home/jingze_xu/office/libreoffice-7.6.0.0.beta1/sd/Library_sdui.mk:10: 
/home/jingze_xu/office/libreoffice-7.6.0.0.beta1/instdir/program/libsduilo.so] 
Error 1
make: *** [Makefile:121: sd] Error 2"


Are there some clues about linking so library in libreoffice codebase?
Thanks!
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If this is not the right place to ask questions, I'm sorry about this and 
please tell me where to ask questions. Thanks!


Best wishes,
Jingze Xu

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