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docs: Update glib-mkenums man page
We should show how to properly use glib-mkenums with Autotools, in the hope that fewer people will be caught cargo-culting rules written in the late '90s. https://bugzilla.gnome.org/show_bug.cgi?id=788948
This commit is contained in:
Emmanuele Bassi
parent
bf4f825e84
commit
cd97f93bf7
@ -208,30 +208,54 @@ typedef enum /*< flags,prefix=PREFIX >*/
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<varlistentry>
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<term><option>--fhead</option> <replaceable>TEXT</replaceable></term>
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<listitem><para>
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Put out <replaceable>TEXT</replaceable> prior to processing input files.
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Emits <replaceable>TEXT</replaceable> prior to processing input files.
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</para>
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<para>
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You can specify this option multiple times, and the <replaceable>TEXT</replaceable>
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will be concatenated.
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</para>
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<para>
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When used along with a template file, <replaceable>TEXT</replaceable>
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will be prepended to the template's <literal>file-header</literal> section.
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</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><option>--fprod</option> <replaceable>TEXT</replaceable></term>
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<listitem><para>
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Put out <replaceable>TEXT</replaceable> everytime a new input file
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Emits <replaceable>TEXT</replaceable> every time a new input file
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is being processed.
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</para>
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<para>
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You can specify this option multiple times, and the <replaceable>TEXT</replaceable>
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will be concatenated.
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</para>
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<para>
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When used along with a template file, <replaceable>TEXT</replaceable>
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will be appended to the template's <literal>file-production</literal> section.
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</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><option>--ftail</option> <replaceable>TEXT</replaceable></term>
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<listitem><para>
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Put out <replaceable>TEXT</replaceable> after all input files have been
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Emits <replaceable>TEXT</replaceable> after all input files have been
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processed.
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</para>
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<para>
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You can specify this option multiple times, and the <replaceable>TEXT</replaceable>
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will be concatenated.
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</para>
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<para>
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When used along with a template file, <replaceable>TEXT</replaceable>
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will be appended to the template's <literal>file-tail</literal> section.
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</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><option>--eprod</option> <replaceable>TEXT</replaceable></term>
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<listitem><para>
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Put out <replaceable>TEXT</replaceable> everytime an enum is encountered
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Emits <replaceable>TEXT</replaceable> everytime an enum is encountered
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in the input files.
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</para></listitem>
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</varlistentry>
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@ -239,23 +263,47 @@ in the input files.
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<varlistentry>
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<term><option>--vhead</option> <replaceable>TEXT</replaceable></term>
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<listitem><para>
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Put out <replaceable>TEXT</replaceable> before iterating over the set of
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Emits <replaceable>TEXT</replaceable> before iterating over the set of
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values of an enum.
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</para>
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<para>
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You can specify this option multiple times, and the <replaceable>TEXT</replaceable>
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will be concatenated.
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</para>
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<para>
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When used along with a template file, <replaceable>TEXT</replaceable>
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will be prepended to the template's <literal>value-header</literal> section.
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</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><option>--vprod</option> <replaceable>TEXT</replaceable></term>
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<listitem><para>
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Put out <replaceable>TEXT</replaceable> for every value of an enum.
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Emits <replaceable>TEXT</replaceable> for every value of an enum.
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</para>
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<para>
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You can specify this option multiple times, and the <replaceable>TEXT</replaceable>
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will be concatenated.
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</para>
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<para>
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When used along with a template file, <replaceable>TEXT</replaceable>
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will be appended to the template's <literal>value-production</literal> section.
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</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><option>--vtail</option> <replaceable>TEXT</replaceable></term>
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<listitem><para>
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Put out <replaceable>TEXT</replaceable> after iterating over all values
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Emits <replaceable>TEXT</replaceable> after iterating over all values
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of an enum.
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</para>
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<para>
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You can specify this option multiple times, and the <replaceable>TEXT</replaceable>
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will be concatenated.
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</para>
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<para>
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When used along with a template file, <replaceable>TEXT</replaceable>
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will be appended to the template's <literal>value-tail</literal> section.
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</para></listitem>
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</varlistentry>
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@ -332,6 +380,125 @@ Write output to FILE instead of stdout.
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</variablelist>
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</refsect1>
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<refsect1><title>Using glib-mkenums with Autotools</title>
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<para>
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<para>
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In order to use <command>glib-mkenums</command> in your project when using
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Autotools as the build system, you will first need to modify your
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<filename>configure.ac</filename> file to ensure you find the appropriate
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command using <command>pkg-config</command>, similarly as to how you discover
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the compiler and linker flags for GLib.
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</para>
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<informalexample><programlisting>
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PKG_PROG_PKG_CONFIG([0.28])
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PKG_CHECK_VAR([GLIB_MKENUMS], [glib-2.0], [glib_mkenums])
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</programlisting></informalexample>
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<para>
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In your <filename>Makefile.am</filename> file you will typically use rules
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like these:
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</para>
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<informalexample><programlisting>
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# A list of headers to inspect
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project_headers = \
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project-foo.h \
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project-bar.h \
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project-baz.h
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enum-types.h: $(project_headers) enum-types.h.in
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$(AM_V_GEN)$(GLIB_MKENUMS) \
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--template=enum-types.h.in \
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--output=$@ \
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$(project_headers)
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enum-types.c: $(project_headers) enum-types.c.in enum-types.h
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$(AM_V_GEN)$(GLIB_MKENUMS) \
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--template=enum-types.c.in \
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--output=$@ \
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$(project_headers)
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BUILT_SOURCES += enum-types.h enum-types.c
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CLEANFILES += enum-types.h enum-types.c
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EXTRA_DIST += enum-types.h.in enum-types.c.in
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</programlisting></informalexample>
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<para>
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In the example above, we have a variable called <literal>project_headers</literal>
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where we reference all header files we want to inspect for generating enumeration
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GTypes. In the <filename>enum-types.h</filename> rule we use <command>glib-mkenums</command>
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with a template called <filename>enum-types.h.in</filename> in order to generate the
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header file; a header template file will typically look like this:
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</para>
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<informalexample><programlisting>
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/*** BEGIN file-header ***/
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#pragma once
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/* Include the main project header */
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#include "project.h"
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G_BEGIN_DECLS
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/*** END file-header ***/
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/*** BEGIN file-production ***/
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/* enumerations from "@filename@" */
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/*** END file-production ***/
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/*** BEGIN value-header ***/
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GType @enum_name@_get_type (void) G_GNUC_CONST;
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#define @ENUMPREFIX@_TYPE_@ENUMSHORT@ (@enum_name@_get_type ())
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/*** END value-header ***/
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/*** BEGIN file-tail ***/
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G_END_DECLS
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/*** END file-tail ***/
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</programlisting></informalexample>
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<para>
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The <filename>enum-types.c</filename> rule is similar to the rule for the
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header file, but will use a different <filename>enum-types.c.in</filename> template
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file, similar to this:
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</para>
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<informalexample><programlisting>
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/*** BEGIN file-header ***/
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#include "config.h"
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#include "enum-types.h"
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/*** END file-header ***/
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/*** BEGIN file-production ***/
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/* enumerations from "@filename@" */
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/*** END file-production ***/
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/*** BEGIN value-header ***/
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GType
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@enum_name@_get_type (void)
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{
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static volatile gsize g_@type@_type_id__volatile;
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if (g_once_init_enter (&g_define_type_id__volatile))
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{
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static const G@Type@Value values[] = {
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/*** END value-header ***/
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/*** BEGIN value-production ***/
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{ @VALUENAME@, "@VALUENAME@", "@valuenick@" },
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/*** END value-production ***/
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/*** BEGIN value-tail ***/
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{ 0, NULL, NULL }
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};
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GType g_@type@_type_id =
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g_@type@_register_static (g_intern_static_string ("@EnumName@"), values);
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g_once_init_leave (&g_@type@_type_id__volatile, g_@type@_type_id);
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}
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return g_@type@_type_id__volatile;
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}
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/*** END value-tail ***/
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</programlisting></informalexample>
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</refsect1>
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<refsect1><title>See also</title>
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<para>
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<citerefentry>
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