undefined reference to functions of quadmath lib (__float128) [duplicate] - c++

Question

What should I fix in the Makefile?
jalal#klein:~/computer_vision/mmglm_neuroimage_private-master/lib/c++/src$ make
g++ -g -Wall -Wextra -Wunreachable-code -static mmglm_spd_multithread.cpp -o ../bin/mmglm_spd_par -fopenmp -O3 -llapack -lblas -lpthread -lgfortran -lboost_system -lboost_filesystem -I ../lib/armadillo-3.930.2/include/
mmglm_spd_multithread.cpp: In function ‘int main(int, char**)’:
mmglm_spd_multithread.cpp:117:10: warning: unused variable ‘length’ [-Wunused-variable]
size_t length=0;//initializing length as a counter
^
/usr/lib/gcc/x86_64-linux-gnu/5/libgomp.a(target.o): In function `gomp_target_init':
(.text+0xba): warning: Using 'dlopen' in statically linked applications requires at runtime the shared libraries from the glibc version used for linking
/usr/lib/gcc/x86_64-linux-gnu/5/libgfortran.a(write.o): In function `write_float':
(.text.write_float+0xb2): undefined reference to `signbitq'
/usr/lib/gcc/x86_64-linux-gnu/5/libgfortran.a(write.o): In function `write_float':
(.text.write_float+0xbf): undefined reference to `finiteq'
/usr/lib/gcc/x86_64-linux-gnu/5/libgfortran.a(write.o): In function `write_float':
(.text.write_float+0x133): undefined reference to `quadmath_snprintf'
/usr/lib/gcc/x86_64-linux-gnu/5/libgfortran.a(write.o): In function `write_float':
(.text.write_float+0x254): undefined reference to `finiteq'
/usr/lib/gcc/x86_64-linux-gnu/5/libgfortran.a(write.o): In function `write_float':
(.text.write_float+0xaff): undefined reference to `isnanq'
/usr/lib/gcc/x86_64-linux-gnu/5/libgfortran.a(write.o): In function `write_float':
(.text.write_float+0xb83): undefined reference to `quadmath_snprintf'
/usr/lib/gcc/x86_64-linux-gnu/5/libgfortran.a(write.o): In function `write_float':
(.text.write_float+0xf7d): undefined reference to `quadmath_snprintf'
/usr/lib/gcc/x86_64-linux-gnu/5/libgfortran.a(write.o): In function `write_float':
(.text.write_float+0x10d8): undefined reference to `quadmath_snprintf'
collect2: error: ld returned 1 exit status
Makefile:13: recipe for target 'multithread' failed
make: *** [multithread] Error 1
I have:
$ g++ -v
Using built-in specs.
COLLECT_GCC=g++
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/5/lto-wrapper
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu 5.4.0-6ubuntu1~16.04.2' --with-bugurl=file:///usr/share/doc/gcc-5/README.Bugs --enable-languages=c,ada,c++,java,go,d,fortran,objc,obj-c++ --prefix=/usr --program-suffix=-5 --enable-shared --enable-linker-build-id --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --with-default-libstdcxx-abi=new --enable-gnu-unique-object --disable-vtable-verify --enable-libmpx --enable-plugin --with-system-zlib --disable-browser-plugin --enable-java-awt=gtk --enable-gtk-cairo --with-java-home=/usr/lib/jvm/java-1.5.0-gcj-5-amd64/jre --enable-java-home --with-jvm-root-dir=/usr/lib/jvm/java-1.5.0-gcj-5-amd64 --with-jvm-jar-dir=/usr/lib/jvm-exports/java-1.5.0-gcj-5-amd64 --with-arch-directory=amd64 --with-ecj-jar=/usr/share/java/eclipse-ecj.jar --enable-objc-gc --enable-multiarch --disable-werror --with-arch-32=i686 --with-abi=m64 --with-multilib-list=m32,m64,mx32 --enable-multilib --with-tune=generic --enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=x86_64-linux-gnu
Thread model: posix
gcc version 5.4.0 20160609 (Ubuntu 5.4.0-6ubuntu1~16.04.2)
and
$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 16.04.1 LTS
Release: 16.04
Codename: xenial
Here's the related lines from Makefile:
CC= g++
CFLAGS= -Wall -Wextra -Wunreachable-code -static
#-static
#INC_PATH= -I ../lib/armadillo-7.100.3/include/
INC_PATH= -I ../lib/armadillo-3.930.2/include/
LIB_PATH= -llapack -lblas -lpthread -lgfortran -lboost_system -lboost_filesystem
#LIB_PATH= -DARMA_DONT_USE_WRAPPER
#lrefblas
all: multithread mmglm show_arma_mx armabin2asciifull armabinequaltotxt
multithread_fast:
$(CC) -g $(CFLAGS) mmglm_spd_multithread_fast.cpp -o ../bin/mmglm_spd_par_fast -fopenmp -O3 $(LIB_PATH) $(INC_PATH)
multithread:
$(CC) -g $(CFLAGS) mmglm_spd_multithread.cpp -o ../bin/mmglm_spd_par -fopenmp -O3 $(LIB_PATH) $(INC_PATH)
I even tried having -lquadmath flag but got the same error:
multithread:
$(CC) -g $(CFLAGS) mmglm_spd_multithread.cpp -o ../bin/mmglm_spd_par -fopenmp -lquadmath -O3 $(LIB_PATH) $(INC_PATH)
I also have the following packages installed:
2043 sudo apt-get install liblapack-dev
2044 sudo apt-get install liblapacke
2045 sudo apt-get install liblapacke-dev
2046 sudo apt-get install libblas-dev
2048 sudo apt-get install gfortran
2049 sudo apt-get install libatlas-base-dev
2050 sudo apt-get install liblapack3
2052 sudo apt-get install libarmadillo-dev
2056 sudo apt-get install libarmadillo6
2057 sudo apt-get install libarmadillo6-dbgsym
2071 sudo apt-get install libboost-dev
2077 sudo apt-get install libboost-system-dev
2080 sudo apt-get install libboost-filesystem-dev

Answer 1

Solved the problem by adding -lquadmath at the end of this line:
LIB_PATH= -llapack -lblas -lpthread -lgfortran -lboost_system -lboost_filesystem -lquadmath