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umfpack - undefined reference

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linux-howto

http://ubuntuforums.org – Downloaded and compiled UMFPACK [1] and it went well copied out the example program Tim Davis has written up and I got this error me@sun:~/umfpack$ cc ex.c /tmp/ccBVFK6B.o: In function `main': ex.c:(.text+0x4a): undefined reference to `umfpack_di_symbolic' ex.c:(.text+0x7b): undefined reference to `umfpack_di_numeric' ex.c:(.text+0x87): undefined reference to `umfpack_di_free_symbolic' ex.c:(.text+0xc6): undefined reference to `umfpack_di_solve' ex.c:(.text+0xd2): undefined reference to `umfpack_di_free_numeric' collect2: ld returned 1 exit status I had originally thought that I would need t (Hardware)