Cannot find libcrypto in Ubuntu

Question

I want to try one program which have makefile on it but when I put make in the shell the error was:

 g++ -g -DaUNIX -I../../acroname/aInclude -I../../acroname/aSource -Wl,-rpath,.     unix_aLaserDemo_Data/aLaserDemo.o unix_aLaserDemo_Data/acpLaser.o -lpthread -lcrypto -lssl  -o ../../acroname/aBinary/aLaserDemo
/usr/bin/ld: cannot find -lcrypto
collect2: ld returned 1 exit status

Here is the makefile:

 CC = g++
 CFLAGS = -DaUNIX -I../../acroname/aInclude -I../../acroname/aSource
 LFLAGS = -Wl,-rpath,.
 SRC = ../../acroname/aSource
 BIN = ../../acroname/aBinary
 LIBS = -lpthread -lcrypto -lssl \
 #LIBS = -lpthread\
       -L../../acroname/aBinary -l aUtil -l aIO
 OBJ = unix_aLaserDemo_Data

.PHONY : app
 app : $(OBJ) $(BIN)/aLaserDemo

$(OBJ) :
        mkdir $(OBJ)

$(BIN)/aLaserDemo : $(OBJ)/aLaserDemo.o $(OBJ)/acpLaser.o
        $(CC) -g $(CFLAGS) $(LFLAGS) $^ $(LIBS) -o $@

$(OBJ)/aLaserDemo.o : aLaserDemo.cpp
        $(CC) -c $(CFLAGS) $< -o $@

$(OBJ)/acpLaser.o : $(SRC)/acpLaser.cpp $(SRC)/acpLaser.h
        $(CC) -c $(CFLAGS) $< -o $@

 .PHONY : clean
 clean :
    rm -rf $(OBJ)
    rm -f $(BIN)/aLaserDemo

I try to locate the crypto library:

 /usr/lib/i486/libcrypto.so.0.9.8
 /usr/lib/i586/libcrypto.so.0.9.8
 /usr/lib/i686/cmov/libcrypto.so.0.9.8
 /usr/lib/libcrypto.so.0.9.8

What should I do to fix it?

Solution 1

I solved this on 12.10 by installing libssl-dev.

sudo apt-get install libssl-dev

Solution 2

ld is trying to find libcrypto.sowhich is not present as seen in your locate output. You can make a copy of the libcrypto.so.0.9.8 and name it as libcrypto.so. Put this is your ld path. ( If you do not have root access then you can put it in a local path and specify the path manually )

Comments

[Limavolt]

how we know it is 64 bits or 32 bit? I am beginner in linux.

[Jonathan Leffler]

You need to install the development code (package) for the crypto library. Specifically, you need /usr/lib/libcrypto.so (no numerical suffix) pointing at (symlinked to) /usr/lib/libcrypto.so.0.9.8. The linking process looks for a name ending .so; the run-time looks for the name with the versioned suffix. The devel package will ensure the right links are created for development with the crypto library; what you have at the moment is only for the runtime.

[perreal]

you can do uname -a to check if it is 64bit. Also do sudo apt-get install libssl-dev to install development package.

[Limavolt]

unfortunatly I have not a root access. I try to #LIBS = -lpthread -lcrypto -lssl \ and change to LIBS = -lpthread\ but there are much more errors occur

[Limavolt]

When I do uname -a the result is : Linux pc4268 2.6.20-16-generic #2 SMP Sun Sep 23 19:50:39 UTC 2007 i686 GNU/Linux

[Admin]

Try adding -L/usr/lib/i686/cmov to LFLAGS. While the compiler (linker) should automatically pick up /usr/lib/libcrypto, the latter's probably a symbolic link to one of the others. See if pointing to such an explicit directory works.

[Limavolt]

Thank you Evert I add and here the result. /usr/bin/ld: .: No such file: File format not recognized

[ThunderPhoenix]

Can you specify how to put libcrypto.so in ld path ?

[Scrooge McDuck]

this is so unintuitive