Installation error " g++: error: unrecognized command line option ‘-arch’ "

mothur bugs
1

I want to install 64 bit version of Mothur on elementary os(ubuntu based).
Makefile settings:

USEMPI ?= no
64BIT_VERSION ?= yes
USEREADLINE ?= yes
USECOMPRESSION ?= no
MOTHUR_FILES="\"Enter_your_default_path_here\""
RELEASE_DATE = "\"3/31/2015\""
VERSION = "\"1.35.1\""
FORTAN_COMPILER = gfortran
FORTRAN_FLAGS =

g++ version used : g++ (Ubuntu 4.8.4-2ubuntu1~14.04.3) 4.8.4

this shows the error :

>>>~/mothur/source$ make
gfortran -c -m64 *.f
g++ -O3 -DBIT_VERSION -DRELEASE_DATE="\"3/31/2015\"" -DVERSION="\"1.35.1\"" -DUSE_READLINE -I.  -I calculators/  -I chimera/  -I classifier/  -I clearcut/  -I commands/  -I communitytype/  -I datastructures/  -I metastats/  -I randomforest/  -I read/  -I svm/  -arch x86_64 -c -o calculators/ace.o calculators/ace.cpp
g++: error: x86_64: No such file or directory
g++: error: unrecognized command line option ‘-arch’
make: *** [calculators/ace.o] Error 1

I am very new to this field. So this might be a very trivial mistake on my part.
Any help would be appreciated.
Thank you.

2

Apparently it was a noob mistake. In the makefile, the mac command was uncommented. :smiley: