[Rd] Rtools28 - undefined references with gfortran

minime234 cernmach01 at gmail.com
Sat May 30 13:56:38 CEST 2009

use the option -lgfortran

John Nolan-3 wrote:
> I recently upgraded to Rtools28 to build a package under
> Windows.  I see that g77 is no longer in Rtools, but it
> does have gfortran, and it uses version:
>    GNU Fortran (GCC) 4.2.1-sjlj (mingw32-2)
> I am compiling some old fortran code as part of a larger
> project.  When I do that, I get undefined references:
> gcc.exe: s_cmp.o: No such file or directory
> gcc.exe: s_copy.o: No such file or directory
> gcc.exe: s_cat.o: No such file or directory
> gcc.exe: F77_aloc.o: No such file or directory
> I don't see these entry points in any of the accompanying
> library files.   I hunted around and found the above
> functions in an old MinGW library libg2c.lib
> When I link them in, I get different undefined references:
> ilaenv.o:ilaenv.f:(.text+0x55): undefined reference to
> `_gfortran_compare_string
> dlamch.o:dlamch.f:(.text+0x3bf): undefined reference to
> `_gfortran_pow_r8_i4'
> dormlq.o:dormlq.f:(.text+0x281): undefined reference to
> `_gfortran_concat_string
> Any guidance on how to solve this problem?
> John Nolan
> 	[[alternative HTML version deleted]]
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