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[[cmake-single]]
=== CMake (single-binary package)
Here is an example of creating a simple Debian package from a simple C source program using CMake (*CMakeLists.txt* and some files such as *config.h.in*) as its build system. See <<cmake>>.
The *cmake* command generates the *Makefile* file based on the *CMakeLists.txt* file and its *-D* option. It also configures the file as specified in its *configure_file(...)* by replacing strings with *@...@* and changing the *#cmakedefine ...* line.
Let's assume this upstream tarball to be *debhello-1.7.tar.gz*.
This type of source is meant to be installed as a non-system file, for example, as:
----
$ tar -xzmf debhello-1.7.tar.gz
$ cd debhello-1.7
$ mkdir obj-x86_64-linux-gnu # for out-of-tree build
$ cd obj-x86_64-linux-gnu
$ cmake ..
$ make
$ make install
----
Let's get the source and make the Debian package.
.Download *debhello-1.7.tar.gz*
----
include::../examples/debhello-1.7_build-1/step000.slog[]
----
Here, the contents of this source are as follows.
.*src/hello.c* (v=1.7):
----
include::../examples/debhello-1.7_build-1/step101.slog[]
----
.*src/config.h.in* (v=1.7):
----
include::../examples/debhello-1.7_build-1/step102.slog[]
----
.*CMakeLists.txt* (v=1.7):
----
include::../examples/debhello-1.7_build-1/step103.slog[]
----
Let's package this with the *debmake* command.
----
sys::[head -n3 ../examples/debhello-1.7_build-1/step200.slog]
...
sys::[grep -A12 '^I: sanity check of parameters' ../examples/debhello-1.7_build-1/step200.slog]
...
----
The result is similar to <<configure-single>> but not exactly the same.
Let's inspect the notable template files generated.
// .The source tree after the basic *debmake* execution. (v=1.7)
// ----
// include::../examples/debhello-1.7_build-1/step201.slog[]
// ----
.*debian/rules* (template file, v=1.7):
----
include::../examples/debhello-1.7_build-1/step202.slog[]
----
.*debian/control* (template file, v=1.7):
----
include::../examples/debhello-1.7_build-1/step203.slog[]
----
Let's make this Debian package better as the maintainer.
.*debian/rules* (maintainer version, v=1.7):
----
include::../examples/debhello-1.7_build-1/step301.slog[]
----
.*debian/control* (maintainer version, v=1.7):
----
include::../examples/debhello-1.7_build-1/step302.slog[]
----
There are several other template files under the *debian/* directory. These also need to be updated.
The rest of the packaging activities are practically the same as the one in <<configure-single>>.
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