[R] configure problem - mixed fortran/c

[Skip Montanaro]

    Brian> There is one, and it told you, `check LDFLAGS for paths to
    Brian> Fortran libraries'. I don't see that you have told us the result
    Brian> of your check, so surmise you haven't checked, and suspect that
    Brian> is the problem.

    >> My environment is:
    >> 
    >> Solaris 9 on Intel
    >> gcc and g77 3.3.2

    Brian> You need wherever libg2c.so is installed in your LD_LIBRARY_PATH.

Thanks, that was the ticket.  Now that I know what's going on, I understand
what I was looking at in config.log.  I see link lines like this:

    gcc -o conftest -g -O2 -I/usr/local/include -L/usr/local/lib conftest.c \
    cfortran_test.o -ldl -ltermcap -lm   -L/usr/ccs/lib -L/usr/lib \
    -L/usr/local/lib \
    -L/opt/lang/gcc-g77-3.3.2/lib/gcc-lib/i386-pc-solaris2.8/3.3.2 \
    -L/usr/ccs/bin \
    -L/opt/lang/gcc-g77-3.3.2/lib/gcc-lib/i386-pc-solaris2.8/3.3.2/../../.. \
    -lfrtbegin -lg2c -lm -lgcc_s 

libg2c.so resides in /opt/lang/gcc-g77-3.3.2/lib.  It would never have
occurred to me that a library which is part of the g77 distribution couldn't
be found by configure when other directories in that tree.  Given that
that's within the g77 tree and presumably that tree is structured in a
consistent manner, wouldn't it make sense for configure to also add
"-L/opt/lang/gcc-g77-3.3.2/lib" to the link line?  (Maybe that's an autoconf
issue.  I don't see mention of "mixed C/Fortran" in configure.ac, just in
configure.)

Thanks again,

-- 
Skip Montanaro
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