
= Use installed libusual with antimake. =


Install libusual and link against it.


== Build libusual ==

---------------------------------
$ git clone git://github.com/libusual/libusual.git libusual
Cloning into 'libusual'...
done.
$ cd libusual
$ ./autogen.sh
[...]
$ ./configure --disable-shared --prefix=`pwd`/../inst
[...]
$ make
[...]
$ make install
[...]
$ cd ..
---------------------------------

== Build our own code ==


Now we prepare our own code.


First, this is the source file:

.File: prog.c
[source,c]
-----------------------------------
#include <stdio.h>
#include <string.h>
#include <usual/hashing/crc32.h>

int main(void)
{
	const char *data = "CECSFXX";
	uint32_t crc;

	crc = calc_crc32(data, strlen(data), 0);
	printf("crc: %08x\n", crc);
	return 0;
}
-----------------------------------

Here is corresponding Makefile:

.File: Makefile
[source,makefile]
-----------------------------------
# temo hacks to support local install, not needed otherwise
PKG_CONFIG = PKG_CONFIG_PATH=$(CURDIR)/inst/lib/pkgconfig pkg-config

# use pkg-config to get libusual info
USUAL_CPPFLAGS = $(shell $(PKG_CONFIG) libusual --cflags)
USUAL_LDFLAGS = $(shell $(PKG_CONFIG) libusual --libs-only-L)
USUAL_LIBS = $(shell $(PKG_CONFIG) libusual --libs-only-l)

# Generic Antimake
bin_PROGRAMS = prog
prog_SOURCES = prog.c
prog_CPPFLAGS = $(USUAL_CPPFLAGS)
prog_LDFLAGS = $(USUAL_LDFLAGS)
prog_LDADD = $(USUAL_LIBS)

# use installed Antimake
ANTIMAKE = $(shell $(PKG_CONFIG) libusual --variable=antimake)
include $(ANTIMAKE)
-----------------------------------

Build the project

---------------------------------
$ make
     CC       prog.c
     CCLD     prog
$ ls
Makefile  inst	libusual  prog	prog.c
$ ./prog
crc: 12345678
---------------------------------

Done!

