fortran.m4: _AC_FC_LIBRARY_LDFLAGS

[Norman Gray]

Greetings,

A one-liner:

In fortran.m4 _AC_FC_LIBRARY_LDFLAGS, the macro works through the flags  
returned from '$FC -v', including the case

          # Ignore these flags.
        -lang* | -lcrt[[01]].o | -lcrtbegin.o | -lc | -lgcc | -libmil |  
-LANG:=*)
          ;;

On OSX with OpenDarwin g77 installed, however, there's also a -lcrt2.o:

Basil:tmp> g77 -v /dev/null
Driving: g77 -v /dev/null -lfrtbegin -lg2c
Reading specs from  
/Volumes/Boltzmann/opt/local/bin/../lib/gcc-lib/powerpc-apple- 
darwin7.3.1/3.3.3/specs
Configured with:  
/Volumes/Faraday/w/anoncvs.opendarwin.org/darwinports/dports/lang/g77/ 
work/gcc-3.3.3/configure --prefix=/opt/local --enable-languages=c,f77  
--infodir=/opt/local/share/info --mandir=/opt/local/share/man
Thread model: single
gcc version 3.3.3
  
/Volumes/Boltzmann/opt/local/bin/../lib/gcc-lib/powerpc-apple- 
darwin7.3.1/3.3.3/collect2 -dynamic -o a.out -lcrt1.o -lcrt2.o  
-L/Volumes/Boltzmann/opt/local/bin/../lib/gcc-lib/powerpc-apple- 
darwin7.3.1/3.3.3 -L/Volumes/Boltzmann/opt/local/bin/../lib/gcc-lib  
-L/opt/local/lib  
-L/opt/local/lib/gcc-lib/powerpc-apple-darwin7.3.1/3.3.3  
-L/Volumes/Boltzmann/opt/local/bin/../lib/gcc-lib/powerpc-apple- 
darwin7.3.1/3.3.3/../../..  
-L/opt/local/lib/gcc-lib/powerpc-apple-darwin7.3.1/3.3.3/../../..  
/dev/null -lfrtbegin -lg2c -lgcc -lSystem |
 c++filt3
/usr/bin/ld: file: /dev/null is empty (not an object or archive)
collect2: ld returned 1 exit status
Basil:tmp> uname -a
Darwin Basil.home 7.4.0 Darwin Kernel Version 7.4.0: Wed May 12  
16:58:24 PDT 2004; root:xnu/xnu-517.7.7.obj~7/RELEASE_PPC  Power  
Macintosh powerpc
Basil:tmp>

...and this messes things up unless the case is changed so that it  
ignores "-lcrt[[012]].o".  This is in autoconf 2.59.

All the best,

Norman


--
----------------------------------------------------------------------
Norman Gray  :  Physics & Astronomy, Glasgow University, UK
http://www.astro.gla.ac.uk/users/norman/  :  www.starlink.ac.uk