/usr/bin/ld: skipping incompatible /usr/lib/gcc/x86_64-linux-gnu/4.9/libgcc.a when searching for -lgcc
/usr/bin/ld: cannot find -lgcc
/usr/bin/ld: skipping incompatible /usr/lib/gcc/x86_64-linux-gnu/4.9/libgcc_s.so when searching for -lgcc_s
/usr/bin/ld: cannot find -lgcc_s
collect2: error: ld returned 1 exit status
Makefile:21: recipe for target 'btestexplicit' failed
make: *** [btestexplicit] Error 1
./driver.pl: Could not make btest in /var/tmp/datalab.root.9403. The files are in /var/tmp/datalab.root.9403.


tried apt-get install g++-multilib.

Package g++-multilib is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source

E: Package 'g++-multilib' has no installation candidate

You haven't told us what you're trying to build or what system you're running on.

operating system:- kali
i am trying to build a automatic grade checker for c programs.
Make file

#
# Makefile that builds btest and other helper programs for the CS:APP data lab
#
CC = gcc
CFLAGS = -O -Wall -m32
LIBS = -lm

all: btest fshow ishow

btest: btest.c bits.c decl.c tests.c btest.h bits.h
$(CC) $(CFLAGS) $(LIBS) -o btest bits.c btest.c decl.c tests.c

fshow: fshow.c
$(CC) $(CFLAGS) -o fshow fshow.c

ishow: ishow.c
$(CC) $(CFLAGS) -o ishow ishow.c

# Forces a recompile. Used by the driver program.
btestexplicit:
$(CC) $(CFLAGS) $(LIBS) -o btest bits.c btest.c decl.c tests.c

clean:
rm -f *.o btest fshow ishow *~

Kali is a penetration testing distro, it's not really built for every-day usage. I wouldn't be surprised if there's a problem with the repository that's preventing the installation of the 32-bit gcc libraries.

You tried g++-multilib, but how about gcc-multilib?

you ARE going to have major issues using Kali

the best fix if you need to use a debian based OS is to well install Debian 8 or Mint 17

also if you are NEEDING to explicitly build a old 32 bit version you likely will also need to use a older version of gcc
"gcc 3.4-compatibility " will be in the Debian and mint repos , but not likely in the kali repos