feathercoind: undefined reference to `neoscrypt'

Reimelt

Hi developer community,

during the build of feathercoind I get an undefined reference error related to neoscrypt.

I’m running a Linux machine with an Intel i5.
I did build bitcoind from source without problems, the machine runs as bitcoin node now.

To compile the feathercoind I did exclude the neoscrypt_asm.S file from the make process.
This code seems to be optimized for AMD. So I renamed the file and deleted all related lines in the Makefile.
All relevant functions are in neoscrypt.c which compiles successfully into the .o and .lo files.
How can I convince the linker to include neoscrypt?
Thank you for help.
Best
Nils

Detailed output during build process:

user@tux:~/Source/Feathercoin/src$ make
make[1]: Verzeichnis „/home/user/Source/Feathercoin/src“ wird betreten
CXXLD feathercoind
libbitcoin_consensus.a(libbitcoin_consensus_a-block.o): In function CBlockHeader::GetPoWHash(unsigned int) const': /home/user/Source/Feathercoin/src/primitives/block.cpp:23: undefined reference to neoscrypt’
collect2: error: ld returned 1 exit status
Makefile:3726: die Regel für Ziel „feathercoind“ scheiterte
make[1]: *** [feathercoind] Fehler 1
make[1]: Verzeichnis „/home/user/Source/Feathercoin/src“ wird verlassen
Makefile:9616: die Regel für Ziel „all-recursive“ scheiterte
make: *** [all-recursive] Fehler 1

Reimelt

@reimelt I could finally fix it myself.

Solution: create a libneoscrypt.so with the following commands:

export C_INCLUDE_PATH=/home/user/Source/Feathercoin/src/crypto/:.
gcc -c -fPIC crypto/neoscrypt.c -o crypto/neoscrypt.o
cd crypto/
ar rcs neoscrypt.a neoscrypt.o -> create static library
gcc -shared neoscrypt.o -o neoscrypt.so -> convert into shared library
sudo cp neoscrypt.so /usr/lib/x86_64-linux-gnu/libneoscrypt.so -> make lib available

add neoscrypt to Makefile: CRYPTO_LIBS = -lcrypto -lneoscrypt

Wellenreiter

The symbol neoscrypt is defined in src/crypto/neoscrypt.h.

I assume a problem with your include path.

[edit]
Well you fixed it yourself, and I was right with my assupmtion :D

normally it is a job of the ‘autogen.sh’ and ‘configure’ commands to set the include and lib path correctly

Did you do an Autogen.sh and configure after downloading the code from Github?

Reimelt

@wellenreiter Thank you Wellenreiter for your comment.

Yes of course I did both, like with building bitcoind before.

Perhaps neoscrypt compiling into a library like libneoscrypt.so could be included in the Feathercoin “package”. Would make things easier.

Because this is already the second machine where I can`t just build feathercoind out-of-the-box without errors while bitcoind works fine.

Bushstar

Please reset and clean your repo…

git reset --hard HEAD
git clean -fdx

…then when you next run configure.ac add the following flag…

./configure --disable-asm

…that will skip ASM compilation and NeoScrypt should compile with everything else as expected.

Reimelt

@bushstar Good morning Bushstar,
you know, what really happened is that I tried to build Feathercoin on Android.
And now it works! Thank you for the commands. I did exactly what you wrote and after around 5 hours of compiling feathercoind is running on my Moto Z Play.

Wellenreiter

Really interesting, that you have a feathercoind running on Android.
Doesn’t it take too much resources ?

There are a some Android Feathercoin Wallets available in the Play Store, like Feathercoin-Wallet-2 or the Coinotron wallet, But I assume you prefer to compile the code yourself, right?

Reimelt

@wellenreiter Hi Wellenreiter, Lucas recommend the Edge wallet and I’m a happy user of that.
But to understand more of the code I wanted to carry the source code and executables always with me.
It’s a good feeling to just pull out your phone and it’s all there and it really works.
First I played around with picocoin. Then bitcoind with 12hrs compile time and now Feathercoin, which is much lighter than bitcoin as it compiles around 3 times faster.

Wellenreiter

Yes the edge wallet is a light weight wallet and very useful for handheld devices

AcidD

Holy hell! Feathercoind running on android! Amazing

Well done @Reimelt