/Usr/Bin/Ld: Cannot Find -Lemu

/usr/bin/ld: cannot find -lemu

You need to tell the linker where it is:

gcc  stuff -L/opt/libemu -lemu

or:

gcc  stuff /opt/libemu/libemu.a

where stuff is your normal compile/link options files etc.

You can also specify library paths in the LIBRARY_PATH environment variable:

LIBRARY_PATH=/opt/libemu
export LIBRARY_PATH

before you run your build. Yet another option is to see where gcc looks for libraries by running:

gcc --print-search-dirs

and put your library in one of the listed directories.

Edit: It is really not clear from your latest info what you are trying to build. Are you trying to turn a static library into a shared library? Most important - What is the exact filename of the library file you have copied into the /opt/libemu directory?

Get rid of gcc - /usr/bin/ld: warning lib not found

You need to add the dynamic library equivalent of -L:

-Wl,-rpath-link,/path/to/lib

This will cause the linker to look for shared libraries in non-standard places, but only for the purpose of verifying the link is correct.

If you want the program to find the library at that location at run-time, then there's a similar option to do that:

-Wl,-rpath,/path/to/lib

But, if your program runs fine without this then you don't need it.

Compile gawk executable for another server

Thank you so much for the help provided in the comments to my original post. Below is a summary of how it worked in the end. I saw that make resulted in the following as the final compilation command for creating the gawk executable:

gcc -std=gnu99  -g -O2 -DNDEBUG  -L/usr/lib64//lib -o gawk array.o awkgram.o builtin.o cint_array.o command.o debug.o eval.o ext.o field.o floatcomp.o gawkapi.o gawkmisc.o int_array.o io.o main.o mpfr.o msg.o node.o profile.o re.o replace.o str_array.o symbol.o version.o support/libsupport.a -lmpfr -lgmp -ldl -lm 

So I modified that gcc command as below:

Download and compile the mpfr libraries (just ./configure and make).
Download and compile the gmp libraries (just ./configure and make).
Download and compile gawk-4.2.1.

./configure
make
gcc -std=gnu99  -g -O2 -DNDEBUG  -L/usr/lib64//lib -o gawk array.o awkgram.o builtin.o cint_array.o command.o debug.o eval.o ext.o field.o floatcomp.o gawkapi.o gawkmisc.o int_array.o io.o main.o mpfr.o msg.o node.o profile.o re.o replace.o str_array.o symbol.o version.o support/libsupport.a  -Bstatic -L /home/osboxes/Downloads/mpfr-4.0.1/src/.libs/ -l:libmpfr.a -L /home/osboxes/Downloads/gmp-6.1.2/.libs/ -l:libgmp.a -Bdynamic -ldl -lm 

That resulted in a gawk executable that had mpfr and gmp libraries statically linked, so when I transferred it to the server which did not have libmpfr.so already installed, it was able to execute with the static library.

Before adding the static libraries:

[osboxes@osboxes Gawk]$ ldd gawk
    linux-vdso.so.1 =>  (0x00007ffe17750000)
    libmpfr.so.4 => /lib64/libmpfr.so.4 (0x00007fca2042d000)
    libgmp.so.10 => /lib64/libgmp.so.10 (0x00007fca201b5000)
    libdl.so.2 => /lib64/libdl.so.2 (0x00007fca1ffb1000)
    libm.so.6 => /lib64/libm.so.6 (0x00007fca1fcaf000)
    libc.so.6 => /lib64/libc.so.6 (0x00007fca1f8e2000)
    /lib64/ld-linux-x86-64.so.2 (0x00007fca20688000)

After adding the static libraries:

[osboxes@osboxes gawk-4.2.1]$ ldd gawk
    linux-vdso.so.1 =>  (0x00007fff1b8d5000)
    libdl.so.2 => /lib64/libdl.so.2 (0x00007f69363b0000)
    libm.so.6 => /lib64/libm.so.6 (0x00007f69360ae000)
    libc.so.6 => /lib64/libc.so.6 (0x00007f6935ce1000)
    /lib64/ld-linux-x86-64.so.2 (0x00007f69365b4000)

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