Compile error with for_main.o

[Brian_Allison]

I am trying to compile a code that works fine in windows. I am getting this error when it goes to create the executable.

ifort -O0 -g -auto -ansi_alias- -pad_source -traceback -fpconstant -nogen-interfaces \\

relap/relapd.a scdap/scdapd.a \\

matpro/matprod.a scdap/scdapd.a envrl/envrld.a \\

relap5l.dylib -o relap5d.x

Undefined symbols:

"_MAIN__", referenced from:

_main in for_main.o

ld: symbol(s) not found

make[1]: [relap5d.x] Error 1 (ignored)

ifort -O0 -g -auto -ansi_alias- -pad_source -traceback -fpconstant -nogen-interfaces \\ relap/relapd.a scdap/scdapd.a \\ matpro/matprod.a scdap/scdapd.a envrl/envrld.a \\ relap5l.dylib -o relap5d.xUndefined symbols:"_MAIN__", referenced from: _main in for_main.old: symbol(s) not foundmake[1]: [relap5d.x] Error 1 (ignored)

I am running IFC 11.1.084 andI tried IFC 11.1.088

[Steven_L_Intel1]

Is the main program in Fortran or in another language? If in another language, add -nofor-main

[Brian_Allison]

I fixed the for_main.o error and now I am getting this error:

ifort -logo

Intel Fortran Intel 64 Compiler Professional for applications running on Intel 64, Version 11.1 Build 20100203 Package ID: m_cprof_p_11.1.084Copyright (C) 1985-2010 Intel Corporation. All rights reserved.

if [ ! -d "d" ]; then mkdir "d"; fi

ls envrl/*.hh >filedoth

ls envrl/*.ff >filedotf

ls matpro/*.hh >filedoth

ls matpro/*.ff >filedotf

ls relap/*.hh >filedoth

ls relap/*.ff >filedotfls scdap/*.hh >filedoth

ls scdap/*.ff >filedotf

auxx/builderm.x makermacp

cd ..

make -f makrelap NM=d FFLAGS="-O0 -g" FPSTOP= \

O=obj cpl=

ifort -O0 -g -auto -ansi_alias- -pad_source -traceback -fpconstant -nogen-interfaces -nofor-main \

relap/relapd.a scdap/scdapd.a \

matpro/matprod.a scdap/scdapd.a envrl/envrld.a \

relap5l.dylib -o relap5d.x

Undefined symbols:

"_MAIN__", referenced from:

_main in libifcore.a(for_main.o)ld: symbol(s) not found

make[1]: [relap5d.x] Error 1 (ignored)

[Steven_L_Intel1]

That looks like the same error. Where is your main program? Is it Fortran or is it in one of those libraries?

[Brian_Allison]

This was the error before I added the -nofor-main.

Undefined symbols:Undefined symbols:"_MAIN__", referenced from: _main in for_main.old: symbol(s) not found

This is the error I am getting now.

Undefined symbols:ndefined symbols:"_MAIN__", referenced from: _main in libifcore.a(for_main.o)ld: symbol(s) not found

They are different. The main program is fortran.

[Steven_L_Intel1]

Actually, I think they are the same. Either you transcribed them wrong or your display was garbled. If the main program is in Fortran, then do not use -nofor-main. In which object is the main program? What do you get with a "nm -a" on that object?

[Brian_Allison]

If I don't use the -nofor-main I get the error about the for_main.o file, if I use the -nofor-main then I get the error about thelibifcore.a(for_main.o).

I did not transcribe anything wrong. I cut and pasted the text from my look files. As far as the "main" program it is in my fortran files. What do you mean by nm -a on the object?

[Steven_L_Intel1]

The errors are the same, but there are characters missing or garbled from the first one - at least in the reply a couple back.

I mean do:

nm -a mainprog.o

where mainprog.o is the object from compiling your main program. This will list the global symbols defined and used by that object.

[Brian_Allison]

Here is what I got from the main program.

0000000000000000 T _MAIN__

00000000000afc90 C _alcm_

0000000000001410 C _balfar_

0000000000019920 C _bconds_

0000000000000790 C _bcons_

0000000000002b30 C _bder_

U _blkdat_

U _blkdt2_

U _blkdta_

0000000000001fd0 C _bln2wk_

00000000000007b0 C _bloona_

0000000000000150 C _bloonb_

000000000000a090 C _bloond_

0000000000000810 C _bsize_

0000000000001e20 C _buntim_

0000000000000070 C _bwcons_

0000000000017cd0 C _bwgeom_

0000000000019070 C _bwprop_

000000000002fc10 C _bwtrns_

000000000001e510 C _cdfinc_

0000000000001fa0 C _cdfinv_

0000000000000050 C _cmatp_

0000000000000020 C _cmptim_

0000000000000860 C _comctl_

0000000000000050 C _cons_

0000000000000310 C _contrl_

0000000000000290 C _coupl_

0000000000000020 C _cpmdat_

00000000000000b0 C _cprdat_

00000000000c31d0 C _dbacct_

0000000000012c10 C _debout_

0000000000006490 C _effprp_

0000000000000040 C _eht0_

0000000000000040 C _ehtc0_

000000000002a150 C _farays_

0000000001e84800 C _fast_

00000000000065c0 C _fecom_

0000000000000040 C _fginvc_

0000000000022410 C _fgrcom_

U _for_set_reentrancy

U _for_stop_core

0000000000001b90 C _fpbin_

00000000000021b0 C _fpcoef_

00000000000000b0 C _fpctrl_

0000000000000060 C _fpinsc_

0000000000000b10 C _fpinsh_

0000000000014050 C _fpmass_

0000000000000050 C _fpmdl_

0000000000007810 C _fpnonv_

0000000000000100 C _fpvol_

00000000000000d0 C _ftb_

0000000000000010 C _ftbfet_

00000000000000b0 C _genrl_

0000000000086650 C _grscgr_

0000000000000350 C _grsprg_

0000000000001020 C _hardpn_

0000000000000050 C _hfuson_

U _incond_

U _inputd_

0000000000041bd0 C _intcom_

0000000000000320 C _iparm_

00000000000001d0 C _k3all_

0000000000000300 C _k3point_

0000000000000030 C _lvel_

00000000000009c0 C _madatc_

0000000000001c20 C _matdat_

0000000000000020 C _matsrs_

0000000000000010 C _maxmem_

0000000000002c40 C _miscon_

0000000000000070 C _mxnfbv_

0000000000000e70 C _mxnfcv_

0000000000000020 C _nbtim_

0000000000001e90 C _ndxara_

0000000000011250 C _nhtara_

0000000000041cb0 C _nrcom_

00000000000000a0 C _oxcom1_

0000000000000020 C _oxcom2_

0000000000000020 C _oxcom3_

0000000000000350 C _parg_

00000000000001c0 C _parm_

0000000000001490 C _plndat_

0000000000000100 C _prdat_

0000000000005cf0 C _ptscom_

0000000000011850 C _radata_

0000000000000330 C _rgacct_

00000000000004b0 C _rmadac_

0000000000000390 C _rupt_

00000000000d12b0 C _scdcom_

0000000000000010 C _scddat_

000000000003c9c0 C _scdout_

00000000000016e0 C _scdpow_

0000000000000040 C _scntl_

0000000000019a50 C _slbcom_

0000000000007940 C _slumpv_

0000000000000040 C _solcom_

0000000000000240 C _statec_

0000000000000010 C _stcblk_

0000000000000030 C _std2xc_

0000000000000030 C _sth2xc_

U _strip_

00000000002239d0 C _tblsp_

0000000000000150 C _thplot_

U _trnctl_

0000000000006e90 C _trnot1_

000000000000f090 C _trnot2_

0000000000000f00 C _ufilef_

0000000000000030 C _ufiles_

0000000000021c20 C _uoxcom_

0000000000000030 C _vel_

00000000000c3500 C _virtul_

[Steven_L_Intel1]

Ok. That tells me that _MAIN__ is defined in this object. Now, which file, named in your ifort command that does the linking, is this object?

[Brian_Allison]

# Explicit Targets

relap5$(NM).x: envrl/envrl$(NM).a matpro/matpro$(NM).a \

relap/relap5.$O relap/relap$(NM).a scdap/scdap$(NM).a \

tpfh2o$(NM) tpfd2o$(NM) relap5l.dylib

$(f90) $(FFLAGS) $(FPSTOP) $(FL) -nofor-main \

relap/relap$(NM).a scdap/scdap$(NM).a \

matpro/matpro$(NM).a scdap/scdap$(NM).a envrl/envrl$(NM).a \

relap5l.dylib -o relap5$(NM).x

The relap/relap$(NM).a contains the main object deck. THe line relap/relap5.$O is the Main object or program.

[Steven_L_Intel1]

Take out -nofor-main.

I think I need a Linux expert to comment on this...

[Brian_Allison]

With the -nofor-main removed, I get a complaint about undefined symbols referenced from for_main.o.

[Ron_Green]

Brian,

I am confused, please help me. First, let's ignore the fact that this compiled on Windows. What we need to know is: Is the main program in C or Fortran? In C, I would expect

void main() {
..etc..
}

In Fortran:
PROGRAM Foo
...stuff..
end

OR for really old F77 code:
...stuff...
end


The linker is telling us that you don't have either a C or a Fortran main program. If C, -nofor-main should be used. If Fortran you don't need the option but you do need to provide the source file or object file that contains the PROGRAM.

thanks

ron

[Brian_Allison]

It is in Fortran. No C anywhere in our code. So, I will remove the -nofor-main line. I placed the object in IFORT line and I am getting all kinds of undefined symbols now.

Here is the IFORT line

ifort -O0 -g -auto -ansi_alias- -pad_source -traceback -fpconstant -nogen-interfaces \

relap/relapd.a scdap/scdapd.a matpro/matprod.a \

envrl/envrld.a relap/relap5.obj relap5l.dylib -o relap5d.x

The bold underline is the main program. The main program is also included in the relapd.a library found in the bold italic underlined. I think that is where the conflict is.

[Ron_Green]

You are right: you should not put a main program in a static library, relapd.a. That is certain to cause problems. Get it out of there. If the main program is in relap5.obj that is OK, but it can't exist in 2 places and it should never be in a static or dynamic library.

ron

[Brian_Allison]

ok, so I pulled it out of the library and re-compiled. I am still getting undefined symbols.

ifort -O0 -g -auto -ansi_alias- -pad_source -traceback -fpconstant -nogen-interfaces relap/relap5.obj \

relap/relapd.a scdap/scdapd.a matpro/matprod.a \

envrl/envrld.a relap5l.dylib -o relap5d.x

Undefined symbols:

"_jundat_mp_njunsj_", referenced from:

_imlp_ in relapd.a(imlp.obj)

_imlp_ in relapd.a(imlp.obj)

"_voldat_mp_volclear_", referenced from:

_gninit_ in relapd.a(gninit.obj)

"_voldat_mp_vol_", referenced from:

_imlp_ in relapd.a(imlp.obj)

_imlp_ in relapd.a(imlp.obj)

_imlp_ in relapd.a(imlp.obj)

...... and so on.

[Ron_Green]

looks like we're making some progress. Let me help to unravel the symbol names and maybe that can help you find the missing symbols or code:

"_valdat_mp_volclear_"

This symbol and the others with similar names are comprised of:

_mp_

So, there is somewhere in your code: MODULE VOLDAT
and in that module is a subroutine or function or data named VOLCLEAR.

When you compile the source for VOLDAT, you get a .mod file which is used to define the interface for VOLDAT and you get a .o file with the actual code (this is greatly simplified but hopefully helpful).

Now, in relapd there is a subroutine or function named GNINIT. It probably has

USE VOLDAT

SO - when you link, you need to add the .o file that you got when you compiled the source with VOLDAT or add that .o to one of your .a files already in the compile/link command

ron

[Brian_Allison]

Do you think that I may need to adjust my archiving?

matpro/matpro$(NM).a: $(OBJSM)

ar r matpro/matpro$(NM).a $?

ranlib -c matpro/matpro$(NM).a

relap/relap$(NM).a: $(OBJSR)

ar r relap/relap$(NM).a $?

ranlib -c relap/relap$(NM).a

scdap/scdap$(NM).a: $(OBJSS)

ar r scdap/scdap$(NM).a $?

ranlib -c scdap/scdap$(NM).a

The undefined symbols error is happening for everything in my .a files.

[Ron_Green]

the archive and ranlib look fine for Mac OS.

Let's try to find our friend valdat_mp_volclear. Try this:

nm */*.a | grep -i valdat_mp_volclear

this will find all occurences of valdat_mp_volclear in your libraries. If you know what library that should be, you could simplify to:

nm relap/relap5.a | grep -i valdat_mp_volclear

What we want to see: We want to find all undefined references flagged with "U " in the nm output. Ideally we want to find 1 place where it is a target (or defined). nm flags these as "T " in the output. For module data, we expect nm to flag those as "C ".


nm foo.a

foo.a(module_foo.o):
0000000000000402 s EH_frame0
0000000000000402 s L_fde_cie_0
00000000000000d4 d STRLITPACK_0
00000000000000c4 d STRLITPACK_1.0.3
00000000000000cc d STRLITPACK_2.0.3
00000000000000b6 T _foo._
00000000000004a2 S _foo._.eh
0000000000000190 C _foo_mp_myarray_ <<< this is real :: my array(100) in the module
0000000000000000 T _foo_mp_rfunc_ <<< this is a module procedure 'rfunc'
000000000000041a S _foo_mp_rfunc_.eh
000000000000001c T _foo_mp_sub1_ <<< is is subroutine "sub1"
0000000000000452 S _foo_mp_sub1_.eh

What we want to look for is valdat_mp_volclear in your libraries, as either "T " or "C ". And once it's found, whether it's upper or lower case, and whether it has leading and trailing underscores.

If we find that one symbol defined, maybe we can figure out what is going on. IF you cannot find it as "T" or "C" but only as undefined "U", then we need to figure out why the .o file from the module containing valdat_mp_volclear is not getting included into the library.

ron

[Brian_Allison]

Here is what I found.

U _voldat_mp_vol_