== MaKL is a Prerequisite ==
LibU needs https://koanlogic.com/makl to configure and build. 
The following commands should be sufficient to get MaKL installed on any Linux 
flavour or Darwin/MacOSX:
$ wget https://koanlogic.com/download/makl/makl-${VERSION}.tar.gz
$ tar zxf makl-${VERSION}.tar.gz && cd makl-${VERSION}
$ sh configure.sh
$ su 
Password: ****
# make install
Should your platform be one of Solaris, OpenSolaris, FreeBSD, PC-BSD, OpenBSD,
NetBSD, DragonflyBSD, Minix or Windows (MinGW or Gygwin) take a look at the 
INSTALL file in the top-level MaKL sources directory to track down specific 
variations on the theme.
== Download == 
Once MaKL is there, you can start downloading the package (always check the 
official https://koanlogic.com/libu page for the latest version and related 
ChangeLog) and tailor it to your specific needs:
$ wget https://koanlogic.com/download/libu/libu-${VERSION}.tar.gz
$ tar zxf libu-${VERSION}.tar.gz && cd libu-${VERSION}
== Configure ==
E.g. should you need to change the default installation path (i.e. /usr/local),
use:
$ makl-conf --prefix="/my/install/base/dir"
Debug symbols and warnings from the compiler can be switched on via
--enable_debug and --enable_warns (use --enable_icc_warns instead when 
working with the Intel C compiler):
$ makl-conf --enable_debug --enable_warns
Code profiling using gprof(1) can be activated via --enable_profile, and,
more generally, any compiler flag can be passed to the build stage in the 
following way:
$ makl-conf --extra-cflags="-Wformat -Wno-format-extra-args -Wformat-security -Wformat-nonliteral -Wformat=2"
The --extra-xxx="val" is indeed a powerful mechanism by which any Makefile 
variable 'XXX' (uppercase!) can be given an additional value 'val': (ab)use 
it to tweak LDFLAGS, SHLIB_LDFLAGS, etc. as needed.  Anyway if in doubt, 
or in search for exotic features, type makl-conf -h to display the complete 
list of options: it's likely that what you are trying to achieve is already 
there.
By default LibU is compiled as static library, to also enable shared library 
build, supply the --enable_shared flag.
== Pick Up What Needs to be Included ==
The default is to build all the modules, but you can disable the 
inclusion of specific bits selectively using the following switches:
    - --no_hmap: to disable the hmap module
    - --no_config: to disable the config module
    - --no_net: to disable the net module
    - --no_env: to disable the env module
    - --no_fs: to disable the fs module
    - --no_pwd: to disable the pwd module
    - --no_list: to disable the list module
    - --no_array: to disable the array module
    - --no_ringbuffer: to disable the rb module
    - --no_pqueue: to disable the pq module
    - --no_json: to disable the json module
    - --no_bst: to disable the bst module
Also, some specific features regarding the networking code can be disabled
at configuration:
    - --no_ipv6: to disable IPv6 protocol support
    - --no_sctp: to disable SCTP protocol support
    - --no_unixsock: to disable UNIX IPC support
If you need to enable compatibility with (some, not all) 1.X interfaces, 
specify the --compat_1x command line switch.
== Build, Test and Install ==
When you are done with the configure step, you can build LibU bits and 
optionally test them:
$ makl
$ makl -C test
And finally install it:
$ su
Password: ****
# makl install
== Hello LibU ! ==
You now are ready to play with your first LibU program:
$ cat main.c
#include <u/libu.h>
int facility = LOG_LOCAL0;
int main (void)
{
    u_con("Hello LibU world !");
    return 0;
}
Write a Makefile like the following:
$ cat Makefile
include common.mk
PROG = hellolibu
SRCS = main.c
LDADD += /path/to/install/prefix/lib/libu.a
CFLAGS += -I/path/to/install/prefix/include
include prog.mk
Then type:
$ makl && ./hellolibu
and enjoy !