call_external: ld.so.1 relocation error

[Martin Rother <rother(at)gfz-potsdam.de>]

    hi wizards!
	 
	 I used 'call_external' very exceptionally yet. now I run into a 
	 'relocation error' while executing 'call_external' -- with a very
	 simple test-application too. the IDL 'call_external' demo is still
	 running, but as my fortran-code is calling 'atan' (or other 
	 trig.-functions.), the 'ld.so.1' fails to resolve the symbol.
    'make' is designed to call:
	
/opt/zrt_opt/SUNWspro/bin/f77 -pic -G test.f -o test.so -lF77 -lm -lc -lM77
   test.f:
        test:
        test_slave:

    and 'ldd' on 'test.so' seems to be fine:
	 
        libF77.so.4 =>   /opt/zrt_opt/SUNWspro/lib/libF77.so.4
        libm.so.1 =>     /opt/zrt_opt/SUNWspro/lib/libm.so.1
        libc.so.1 =>     /usr/lib/libc.so.1
        libM77.so.2 =>   /opt/zrt_opt/SUNWspro/lib/libM77.so.2
        libdl.so.1 =>    /usr/lib/libdl.so.1
        /usr/platform/SUNW,Ultra-60/lib/libc_psr.so.1

   but my 'test.pro' crashes IDL with:
	
	IDL >>  test
   ld.so.1: /opt/rsi/idl_5.4/bin/bin.solaris2.sparc/idl: \
	fatal: relocation error: \
	file /home/mt/rother/prj/champ/Lib/ME/6/test.so: \
	symbol __atanf: referenced symbol not found
	
           Killed

   (but 'atan' seems to be in 'libM77.so.2'!)

   I'm running IDL 5.4 on a sparc box (solaris 2.7).
	I apologize, if this is a FAQ (but I failed searching 'dejanews' 
	-- which seems to be gone). 
	
	many thanks for hints.
	martin.
-- 
Martin Rother (rother@gfz-potsdam.de) 0331/ 288-1272           Division 2.3
                                      GeoForschungsZentrum Potsdam, Germany

   here the simple code:
------------------------------------------cut here--------------------
      SUBROUTINE test(argc, argv)

      IMPLICIT NONE
!=====================================================================
      INTEGER*4       argc
      INTEGER*4       argv(*)
      INTEGER*4       j

      !===============================================================

      j=LOC(argc)

      CALL test_slave
     .     (
     .     %VAL(argv(1)) 
     .     )

      return
      end

!=====================================================================
!     SLAVE
!=====================================================================

      SUBROUTINE test_slave
     .     (
     .     result  
     .     )
      IMPLICIT NONE
      !===============================================================

      REAL*8              result

      result = atan(0.5)

      return
      end
!=====================================================================
!     EOF test.f
!=====================================================================

-----------------------------------------------cut here---------------

pro test

;=====================================================================
;
;=====================================================================

   result = 0.0D00

   s = CALL_EXTERNAL(                                                $
                       "/home/mt/rother/prj/champ/Lib/ME/6/test.so", $
                       "test_",                                      $
                       result                                        $
                    )

   print, 'result = ', result
   
   return
END
;=====================================================================
;  EOF test
;=====================================================================