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The Hell of Autotools
=====================
March 19, 2018
In this trivial example we compile a custom **webkit2gtk+ extension** with
**autotools**. For a start we need to provide two files, `Makefile.am`
and `configure.ac`, beside our actual `ext.c` source file, which contains
the extension code itself.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ {.c .numberLines}
// File: ext.c //
#include <webkit2/webkit-web-extension.h>
G_MODULE_EXPORT void
webkit_web_extension_initialize_with_user_data (WebKitWebExtension *extension,
GVariant *user_data)
{
g_print("Hello Extension!\n");
}
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ {.makefile .numberLines}
# File: Makefile.am #
webextension_LTLIBRARIES = libmyappwebextension.la
webextensiondir = /home/miguel/temp
WEB_EXTENSION_CFLAGS = `pkg-config --cflags webkit2gtk-web-extension-4.0`
WEB_EXTENSION_LIBS2 = `pkg-config --libs webkit2gtk-web-extension-4.0`
libmyappwebextension_la_SOURCES = ext.c
libmyappwebextension_la_CFLAGS = $(WEB_EXTENSION_CFLAGS)
libmyappwebextension_la_LIBADD = $(WEB_EXTENSION_LIBS)
libmyappwebextension_la_LDFLAGS = -module -avoid-version -no-undefined $(WEB_EXTENSION_LIBS2)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ {.makefile .numberLines}
# File: configure.ac #
AC_PREREQ([2.69])
AC_INIT(ext,0.1,test@example.com)
AM_INIT_AUTOMAKE
AC_CONFIG_SRCDIR([ext.c])
AC_PROG_CC
LT_INIT
AC_CONFIG_FILES([Makefile])
AC_OUTPUT
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Put the above files in a new fresh directory and you are ready to see the
powers of autotools in action.
Run the following commands on your pash prompt:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ {.bash}
touch NEWS README AUTHORS ChangeLog
aclocal
autoconf
automake --add-missing
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
After this steps, we end up with 18 files in our directory. Finally we
can _configure_, _build_ and _install_ our extension. The following
commands will probably look familiar. Note that the _configure_ step
generates 6 additional files, totaling in **24 files** before the actual
_make_ command is run.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ {.bash}
./configure
make
make install
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
... just to compile one **single C file**.
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