Local install of GNU MP, how to access it from ld? - bash

Question

I have a compiled local install of GMP:
/path/to/gmp
.../lib/gmp.h
.../include/[gmp_binaries.etc]
Now, I export the path, just to test the install; I'll add symlinks in some central location once I get it working:
export LD_LIBRARY_PATH=/path/to/gmp:$LD_LIBRARY_PATH
g++ -lgmp
// error: /usr/bin/ld: cannot find -lgmp
export LD_LIBRARY_PATH=/path/to/gmp/include:$LD_LIBRARY_PATH
export LD_LIBRARY_PATH=/path/to/gmp/lib:$LD_LIBRARY_PATH
g++ -lgmp
// error: /usr/bin/ld: cannot find -lgmp
Basically, my question is: how do I connect my local libraries to ld?
(And the point is installing content without sudo, so I can't "just ____," for the most part)

Answer 1

-l requires a -L location to search in g++. Make does not follow your LD_LIBRARY_PATH. Make needs a specific location to search for specific libraries not included in /usr/lib
# define library paths in addition to /usr/lib
# if I wanted to include libraries not in /usr/lib I'd specify
# their path using -Lpath, something like:
LFLAGS = -L/home/newhall/lib -L../lib
From this site
Find your libgmp file, and link as follows:
g++ -L/path/to/libgmp/ -lgmp