openbabel-discuss

[Open Babel] OB API make error: linker input file unused because linking not done

[Roy <amb...@gm...>]

Everything compiled for a NON-root installation on RHEL Server release 5.4,
however the make test failed on three instances
	  9 - isomorphism_Test (Failed)
	 10 - rotor_Test (Failed)
	 54 - pytest_sym (Failed)

9/57 Test  #9: isomorphism_Test .................***Failed  Error regular
expression found in output. Regex=[FAIL]  0.04 sec
      Start 10: rotor_Test
10/57 Test #10: rotor_Test .......................***Failed  Error regular
expression found in output. Regex=[FAIL]  0.03 sec
      Start 11: shuffle_Test
54/57 Test #54: pytest_sym .......................***Failed  Error regular
expression found in output. Regex=[FAIL]  6.00 sec
      Start 55: pytest_fastsearch

I dont know if that makes much of a difference, but my main concern is that
when I try to use the OB API, make gives me warning that
g++: -lopenbabel: linker input file unused because linking not done

Here is my Makefile:
CC = g++
CFLAGS = -c  -I/home/roy/bin/openbabel/include/openbabel-2.0
LDFLAGS = -lopenbabel -L/home/roy/bin/openbabel/lib

all: BABEL_FPT

BABEL_FPT: main.o
	$(CC) $(LDFLAGS) main.o -o BABEL_FPT

main.o: main.cpp
	$(CC) $(CFLAGS) $(LDFLAGS) main.cpp
clean:
	rm *.o BABEL_FPT


Although the program compiles. The values returned (for example for
mol.GetMolWt() ) is 0 for all the molecules read.

The same code and Makefile (with paths changed) works perfectly on my
Desktop  i.e. without any error. 



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Re: [Open Babel] OB API make error: linker input file unused because linking not done

[Roy <amb...@gm...>]

So the issue was with the  BABEL_DATADIR and BABEL_LIBDIR and it was not
reading the molecule. Now I get the correct molecular weights. But still
have no clue whats triggering 
g++: -lopenbabel: linker input file unused because linking not done

Any suggestions ? Will this create trouble in future.



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Re: [Open Babel] OB API make error: linker input file unused because linking not done

[Geoffrey H. <geo...@gm...>]

> g++: -lopenbabel: linker input file unused because linking not done

This sounds like you are supplying -lopenbabel when you are compiling objects before linking the binary. Assuming the binary links, there's no problem -- the compiler is just telling you that you don't need -lopenbabel (e.g., in CXXFLAGS).

Hope that helps,
-Geoff