CODEWITHSUNDEEP
cgcclinker
Aman Deep Gautam
Aman Deep Gautam

Reputation: 8737

Error while linking with gcc?

I run the following command to link the different files in my project.

/opt/gcc-4.7-cilkplus/bin/gcc -g -Wall -l /opt/gcc-4.7-cilkplus/lib64/ -o exec main.o \
    mysql-client.o databaseConnection-common.o murmurhash3.o bloom-filter.o
    `mysql_config --cflags --libs\` -lcilkrts

Note the option -l /opt/gcc-4.7-cilkplus/lib64/

When I run this command I get this error:

/usr/bin/ld: cannot find -l/opt/gcc-4.7-cilkplus/lib64/

but this directory is present in my system. Can anyone please tell the mistake.

Upvotes: 1

Views: 210

Answers (3)

Shahbaz
Shahbaz

Reputation: 47493

-Lpath/to/lib -lname is the syntax (without spaces after -L and -l). If linking to a static library for example, this means that link should be done with path/to/lib/libname.a

Also, note that the order of arguments to linker is important. That is, if object A uses library B, B should be written after it. If B itself uses C, then first A should be mentioned, then B and then C.

Your command therefore would probably look like this:

/opt/gcc-4.7-cilkplus/bin/gcc -g -Wall -o exec main.o mysql-client.o \
databaseConnection-common.o murmurhash3.o bloom-filter.o \
`mysql_config --cflags --libs\` -L/opt/gcc-4.7-cilkplus/lib64/ -lcilkrts
                                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
                                Used -L and moved here

Upvotes: 0

Pedro
Pedro

Reputation: 1384

You are using -l where you should be using -L. The option -l specifies a library, whereas -L specifies a directory in which to look for libraries.

Note also that there is no space between -l or -L and its respective value.

Upvotes: 0

TJD
TJD

Reputation: 11896

-l (el) should be followed by a library, not a directory. Perhaps you meant -L or -I (eye)

Upvotes: 3

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