Error with make on *nix

[jnewing]

When I run make on Deb this is the error I'm getting.

ln -s -f libscrypt.so.0 libscrypt.so
cc -Wall -o reference main.o  b64.o -Wl,-rpath=. -L.  -lscrypt
./libscrypt.so: undefined reference to `log'
collect2: error: ld returned 1 exit status
make: *** [reference] Error 1

[technion]

Can you show us your make command and the entire output? I've just retested Raspbian and CentOS and neither of them had such an error.
The "log" function is path of the math library that should be linked to libscrypt.so.0 using -lm.

[jnewing]

I've just tested again on my ubuntu box

$ make
cc -O2 -Wall -g -D_FORTIFY_SOURCE=2 -fstack-protector -fPIC   -c -o crypto_scrypt-nosse.o crypto_scrypt-nosse.c
cc -O2 -Wall -g -D_FORTIFY_SOURCE=2 -fstack-protector -fPIC   -c -o sha256.o sha256.c
cc -O2 -Wall -g -D_FORTIFY_SOURCE=2 -fstack-protector -fPIC   -c -o crypto_scrypt-hexconvert.o crypto_scrypt-hexconvert.c
cc -O2 -Wall -g -D_FORTIFY_SOURCE=2 -fstack-protector -fPIC   -c -o crypto-mcf.o crypto-mcf.c
cc -O2 -Wall -g -D_FORTIFY_SOURCE=2 -fstack-protector -fPIC   -c -o b64.o b64.c
cc -O2 -Wall -g -D_FORTIFY_SOURCE=2 -fstack-protector -fPIC   -c -o crypto-scrypt-saltgen.o crypto-scrypt-saltgen.c
cc -O2 -Wall -g -D_FORTIFY_SOURCE=2 -fstack-protector -fPIC   -c -o crypto_scrypt-check.o crypto_scrypt-check.c
cc -O2 -Wall -g -D_FORTIFY_SOURCE=2 -fstack-protector -fPIC   -c -o crypto_scrypt-hash.o crypto_scrypt-hash.c
cc  -Wl,-z,now -Wl,-z,relro -Wl,-soname,libscrypt.so.0 -Wl,--version-script=libscrypt.version -shared -o libscrypt.so.0 -lc -lm  crypto_scrypt-nosse.o sha256.o crypto_scrypt-hexconvert.o crypto-mcf.o b64.o crypto-scrypt-saltgen.o crypto_scrypt-check.o crypto_scrypt-hash.o
ar rcs libscrypt.a  crypto_scrypt-nosse.o sha256.o crypto_scrypt-hexconvert.o crypto-mcf.o b64.o crypto-scrypt-saltgen.o crypto_scrypt-check.o crypto_scrypt-hash.o
cc -O2 -Wall -g -D_FORTIFY_SOURCE=2 -fstack-protector -fPIC   -c -o main.o main.c
ln -s -f libscrypt.so.0 libscrypt.so
cc -Wall -o reference main.o  b64.o -Wl,-rpath=. -L.  -lscrypt
./libscrypt.so: undefined reference to `log'
collect2: error: ld returned 1 exit status
make: *** [reference] Error 1

$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 13.10
Release:        13.10
Codename:       saucy

[technion]

Based on what Google tells me about Ubuntu doing unusual things with flags, can you try applying this patch:
https://gist.github.com/technion/9380115

[jnewing]

Yup that fixed it!

[technion]

Thanks for the confirmation. This seems to be an Ubuntuism, more info here:
http://stackoverflow.com/questions/7824439/c-math-linker-problems-on-ubuntu-11-10

I have just committed this fix.