Hi Paul, On Fri, Feb 04, 2011 at 06:46:53PM +0100, Paul van Hoven wrote: > I have an extension for matlab that i want to compile. The machine on > which I compile the code has a g77-3.4 and a gfortran-4.2 compiler > installed. If I set the fortran compiler in the Makefile to g77-3.4 the > compilation process runs through without any error messages and I can > use the extension without any problems. > > > [...] > /net/matlab/Matlab2009b/bin/mex -cxx CXX=/usr/site-local/bin/g++-4.2 > CC=/usr/site-local/bin/g++-4.2 FC= LD=/usr/site-local/bin/g++-4.2 -lg2c > -lm \ > -O -output lbfgsb.mexa64 solver.o matlabexception.o > matlabscalar.o matlabstring.o matlabmatrix.o arrayofmatrices.o program.o > matlabprogram.o lbfgsb.o > solver.o: In function `timer_': > solver.f:(.text+0x17c4): undefined reference to `_gfortran_etime' > solver.o: In function `dcsrch_': > solver.f:(.text+0x1b66): undefined reference to `_gfortran_compare_string' > solver.f:(.text+0x1ca7): undefined reference to `_gfortran_compare_string' > solver.f:(.text+0x20d8): undefined reference to `_gfortran_compare_string' > solver.f:(.text+0x2215): undefined reference to `_gfortran_compare_string' > solver.o: In function `subsm_': > solver.f:(.text+0x2cce): undefined reference to `_gfortran_st_write' > solver.f:(.text+0x2ce2): undefined reference to > `_gfortran_transfer_character' > solver.f:(.text+0x2cea): undefined reference to `_gfortran_st_write_done' > ... > ...long list of errors... > ... > solver.f:(.text+0xb31c): undefined reference to `_gfortran_st_write' > solver.f:(.text+0xb324): undefined reference to `_gfortran_st_write_done' > solver.o: In function `setulb_': > solver.f:(.text+0xb58c): undefined reference to `_gfortran_compare_string' > collect2: ld returned 1 exit status > > mex: link of ' "lbfgsb.mexa64"' failed. You have to link with the gfortran-library. g2c only works with g77. If you add "-lgfortran" to the link command, everything should work well (I hope :-)) Axel
