Including GMP in Qt-Project

[tillorgias]

Hi there,

I have a problem, which is a general Qt/C++-Question: How do I include an external library (adding it to the include path)?

In this case I want to include GMP-Library. I think the answer is very simple, but I don't get it work.
I'm using Linux Ubuntu 10.4 and M$ Windows, but I think this question is platform independent.

Please help me,
Tillorgias

[Talei]

Something along these lines:

win32:INCLUDEPATH += C:\Qt\libs\zlib-1.2.5
 
#INCLUDEPATH - add here path to the SRC that will NEVER change i.e. system src etc.
#DEPENDPATH - add here SRC that WILL CHANGE, to trigger BUILD!

win32:INCLUDEPATH += C:\Qt\libs\zlib-1.2.5

#INCLUDEPATH - add here path to the SRC that will NEVER change i.e. system src etc.
#DEPENDPATH - add here SRC that WILL CHANGE, to trigger BUILD!

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in pro file

[tillorgias]

Hi,

thanks for the help. But do you know WHICH paths are needed for using GMP-Library (on Ubuntu)? That would help a lot because I never worked with external libs before.

Tillorgias

[tillorgias]

OK. I now installed GMP completely. But once I compile it, I get the following (linker-)errors:

main.o: In function `initializeGMP()': 
main.cpp:(.text+0x3e): undefined reference to `__gmpz_init' 
main.cpp:(.text+0x4a): undefined reference to `__gmpz_init' 
main.cpp:(.text+0x56): undefined reference to `__gmpz_init' 
main.cpp:(.text+0x62): undefined reference to `__gmpz_init' 
main.cpp:(.text+0x6e): undefined reference to `__gmpz_init' 
main.o: In function `RSA_checkKeys()': 
main.cpp:(.text+0x21f): undefined reference to `__gmpz_set_str' 
main.cpp:(.text+0x237): undefined reference to `__gmpz_set_str' 
main.cpp:(.text+0x255): undefined reference to `__gmpz_set_str' 
main.o: In function `clearGMP()': 
main.cpp:(.text+0x28e): undefined reference to `__gmpz_clear' 
main.cpp:(.text+0x29a): undefined reference to `__gmpz_clear' 
main.cpp:(.text+0x2a6): undefined reference to `__gmpz_clear' 
main.cpp:(.text+0x2b2): undefined reference to `__gmpz_clear' 
main.cpp:(.text+0x2be): undefined reference to `__gmpz_clear' 
main.o: In function `RSA_generateKeys()': 
main.cpp:(.text+0x347): undefined reference to `__gmpz_init' 
main.cpp:(.text+0x355): undefined reference to `__gmpz_init' 
main.cpp:(.text+0x461): undefined reference to `__gmpz_set_str' 
main.cpp:(.text+0x47b): undefined reference to `__gmpz_set_str' 
main.cpp:(.text+0x48d): undefined reference to `__gmpz_nextprime' 
...

main.o: In function `initializeGMP()': 
main.cpp:(.text+0x3e): undefined reference to `__gmpz_init' 
main.cpp:(.text+0x4a): undefined reference to `__gmpz_init' 
main.cpp:(.text+0x56): undefined reference to `__gmpz_init' 
main.cpp:(.text+0x62): undefined reference to `__gmpz_init' 
main.cpp:(.text+0x6e): undefined reference to `__gmpz_init' 
main.o: In function `RSA_checkKeys()': 
main.cpp:(.text+0x21f): undefined reference to `__gmpz_set_str' 
main.cpp:(.text+0x237): undefined reference to `__gmpz_set_str' 
main.cpp:(.text+0x255): undefined reference to `__gmpz_set_str' 
main.o: In function `clearGMP()': 
main.cpp:(.text+0x28e): undefined reference to `__gmpz_clear' 
main.cpp:(.text+0x29a): undefined reference to `__gmpz_clear' 
main.cpp:(.text+0x2a6): undefined reference to `__gmpz_clear' 
main.cpp:(.text+0x2b2): undefined reference to `__gmpz_clear' 
main.cpp:(.text+0x2be): undefined reference to `__gmpz_clear' 
main.o: In function `RSA_generateKeys()': 
main.cpp:(.text+0x347): undefined reference to `__gmpz_init' 
main.cpp:(.text+0x355): undefined reference to `__gmpz_init' 
main.cpp:(.text+0x461): undefined reference to `__gmpz_set_str' 
main.cpp:(.text+0x47b): undefined reference to `__gmpz_set_str' 
main.cpp:(.text+0x48d): undefined reference to `__gmpz_nextprime' 
...

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I am using the Qt Creator.

Please help...