Problem building and Installing libfpx on my system.

I am running KDE desktop and trying to build and install libfpx as first step in building GraphicsMagick to work with .fpx files.
The installation instructions included in the libfpx-master download from git suggest that the installation should put libfpx in /use/local/bin:-

Installation Names

By default, make install' will install the package's files in /usr/local/bin’, /usr/local/man', etc. You can specify an installation prefix other than /usr/local’ by giving configure' the option –prefix=PATH’.

Sadly libfpx has not appeared in this directory but I have no errors that I can see in the installation process. Here is what the installation did:-

Making install in fpx 
make[1]: Entering directory '/home/alastair/Downloads/libfpx-master/fpx' 
make[2]: Entering directory '/home/alastair/Downloads/libfpx-master/fpx' 
make[2]: Nothing to be done for 'install-exec-am'. 
make[2]: Nothing to be done for 'install-data-am'. 
make[2]: Leaving directory '/home/alastair/Downloads/libfpx-master/fpx' 
make[1]: Leaving directory '/home/alastair/Downloads/libfpx-master/fpx' 
make[1]: Entering directory '/home/alastair/Downloads/libfpx-master' 
make[2]: Entering directory '/home/alastair/Downloads/libfpx-master' 
 /usr/bin/mkdir -p '/usr/local/lib64' 
 /bin/sh ./libtool   --mode=install /usr/bin/install -c   libfpx.la '/usr/local/lib64' 
libtool: install: /usr/bin/install -c .libs/libfpx.so.1.0.31 /usr/local/lib64/libfpx.so.1.0.31 
libtool: install: (cd /usr/local/lib64 && { ln -s -f libfpx.so.1.0.31 libfpx.so.1 || { rm -f libfpx.so.1 && ln -s lib
fpx.so.1.0.31 libfpx.so.1; }; }) 
libtool: install: (cd /usr/local/lib64 && { ln -s -f libfpx.so.1.0.31 libfpx.so || { rm -f libfpx.so && ln -s libfpx.
so.1.0.31 libfpx.so; }; }) 
libtool: install: /usr/bin/install -c .libs/libfpx.lai /usr/local/lib64/libfpx.la 
libtool: install: /usr/bin/install -c .libs/libfpx.a /usr/local/lib64/libfpx.a 
libtool: install: chmod 644 /usr/local/lib64/libfpx.a 
libtool: install: ranlib /usr/local/lib64/libfpx.a 
libtool: finish: PATH="/usr/sbin:/usr/bin:/sbin:/bin:/usr/local/bin:/usr/local/sbin:/sbin" ldconfig -n /usr/local/lib
64 
---------------------------------------------------------------------- 
Libraries have been installed in: 
   /usr/local/lib64 

If you ever happen to want to link against installed libraries 
in a given directory, LIBDIR, you must either use libtool, and 
specify the full pathname of the library, or use the '-LLIBDIR' 
flag during linking and do at least one of the following: 
   - add LIBDIR to the 'LD_LIBRARY_PATH' environment variable 
     during execution 
   - add LIBDIR to the 'LD_RUN_PATH' environment variable 
     during linking 
   - use the '-Wl,-rpath -Wl,LIBDIR' linker flag 
   - have your system administrator add LIBDIR to '/etc/ld.so.conf' 

See any operating system documentation about shared libraries for 
more information, such as the ld(1) and ld.so(8) manual pages. 
---------------------------------------------------------------------- 
 /usr/bin/mkdir -p '/usr/local/include' 
 /usr/bin/install -c -m 644 fpxlib.h '/usr/local/include' 
make[2]: Leaving directory '/home/alastair/Downloads/libfpx-master' 
make[1]: Leaving directory '/home/alastair/Downloads/libfpx-master'



Well out of my depth here but I cannot see the part that tells me that the libfpx file should be in my /usr/local/bin directory. I ran the installation as sudo because otherwise the program refused to make directories in my system, which I assume is all as it should be. Have I messed up so far?