That warning message which occurs in WIEN2k 18.2 (and 18.1) with the
ifort compiler means the -lm flag should not come before the object (.o)
files:
username@computername:~$ cd $WIENROOT/SRC_cif2struct
username@computername:~/WIEN2k/SRC_cif2struct$ tail -2 compile.msg
ifort -o ./cif2struct -O1 -FR -mp1 -w -prec_div -pc80 -pad -ip
-DINTEL_VML -traceback -assume buffered_io
-I/opt/intel/composer_xe_2013_sp1.1.106/mkl/include
-L/opt/intel/composer_xe_2013_sp1.1.106/mkl/lib/ -lpthread -lm -ldl
-liomp5 module.o spacegroup.o getlattype.o getsgnum.o getsgname.o
getzz.o structgen.o scan_cif.o ciftbx.o hash_funcs.o test_sgname.o scan_in.o
ifort: warning #10315: specifying -lm before files may supersede the
Intel(R) math library and affect performance
If you swap "$(LDFLAGS) $(OBJS)" and "$(OBJS) $(LDFLAGS)" in the
Makefile.orig in the SRC_cif2struct folder using the following WIEN2k
18.2 patch file (and update the Makefile with siteconfig), it should fix
it so that -lm comes after the object files and remove the warning:
username@computername:~/WIEN2k/SRC_cif2struct$ wget
https://raw.githubusercontent.com/gsabo/WIEN2k-Patches/master/18.2/Makefile.orig.patch
...
username@computername:~/WIEN2k/SRC_cif2struct$ patch -b Makefile.orig
Makefile.orig.patch
patching file Makefile.orig
username@computername:~/WIEN2k/SRC_cif2struct$ cd ..
username@computername:~/WIEN2k$ ./siteconfig
...
Selection: O
...
Selection: S
...
Selection: R
...
Selection: S
Which program to recompile? cif2struct
...
Selection: Q
...
username@computername:~/WIEN2k$ cd SRC_cif2struct/
username@computername:~/WIEN2k/SRC_cif2struct$ tail -2 compile.msg
ifort -c -O1 -FR -mp1 -w -prec_div -pc80 -pad -ip -DINTEL_VML -traceback
-assume buffered_io -I/opt/intel/composer_xe_2013_sp1.1.106/mkl/include
scan_in.f
ifort -o ./cif2struct module.o spacegroup.o getlattype.o getsgnum.o
getsgname.o getzz.o structgen.o scan_cif.o ciftbx.o hash_funcs.o
test_sgname.o scan_in.o -O1 -FR -mp1 -w -prec_div -pc80 -pad -ip
-DINTEL_VML -traceback -assume buffered_io
-I/opt/intel/composer_xe_2013_sp1.1.106/mkl/include
-L/opt/intel/composer_xe_2013_sp1.1.106/mkl/lib/ -lpthread -lm -ldl -liomp5
On 7/7/2018 1:29 PM, Dr. K. C. Bhamu wrote:
Now, I tried to install latest version of Wien2k on a cluster with
mpiifort and fftw3 and getting below warning during installation:
*ifort: warning #10315: specifying -lm before files may supersede the
Intel(R) math library and affect performance*
I have below setting.
$(FOPT) -L$(MKLROOT)/lib/$(MKL_TARGET_ARCH) -lpthread -lm -ldl -liomp5
Should I remove -lm or can continue?
I do not see any warning or error message at the end of installation.
mkl version is 2013.
Kind regards
Bhamu
_______________________________________________
Wien mailing list
Wien@zeus.theochem.tuwien.ac.at
http://zeus.theochem.tuwien.ac.at/mailman/listinfo/wien
SEARCH the MAILING-LIST at:
http://www.mail-archive.com/wien@zeus.theochem.tuwien.ac.at/index.html
