<html lang="en"> <head> <title>Plugins building - GNU Compiler Collection (GCC) Internals</title> <meta http-equiv="Content-Type" content="text/html"> <meta name="description" content="GNU Compiler Collection (GCC) Internals"> <meta name="generator" content="makeinfo 4.13"> <link title="Top" rel="start" href="index.html#Top"> <link rel="up" href="Plugins.html#Plugins" title="Plugins"> <link rel="prev" href="Plugins-tracking.html#Plugins-tracking" title="Plugins tracking"> <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage"> <!-- Copyright (C) 1988-2015 Free Software Foundation, Inc. Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.3 or any later version published by the Free Software Foundation; with the Invariant Sections being ``Funding Free Software'', the Front-Cover Texts being (a) (see below), and with the Back-Cover Texts being (b) (see below). A copy of the license is included in the section entitled ``GNU Free Documentation License''. (a) The FSF's Front-Cover Text is: A GNU Manual (b) The FSF's Back-Cover Text is: You have freedom to copy and modify this GNU Manual, like GNU software. Copies published by the Free Software Foundation raise funds for GNU development.--> <meta http-equiv="Content-Style-Type" content="text/css"> <style type="text/css"><!-- pre.display { font-family:inherit } pre.format { font-family:inherit } pre.smalldisplay { font-family:inherit; font-size:smaller } pre.smallformat { font-family:inherit; font-size:smaller } pre.smallexample { font-size:smaller } pre.smalllisp { font-size:smaller } span.sc { font-variant:small-caps } span.roman { font-family:serif; font-weight:normal; } span.sansserif { font-family:sans-serif; font-weight:normal; } --></style> </head> <body> <div class="node"> <a name="Plugins-building"></a> <p> Previous: <a rel="previous" accesskey="p" href="Plugins-tracking.html#Plugins-tracking">Plugins tracking</a>, Up: <a rel="up" accesskey="u" href="Plugins.html#Plugins">Plugins</a> <hr> </div> <h3 class="section">23.10 Building GCC plugins</h3> <p>If plugins are enabled, GCC installs the headers needed to build a plugin (somewhere in the installation tree, e.g. under <samp><span class="file">/usr/local</span></samp>). In particular a <samp><span class="file">plugin/include</span></samp> directory is installed, containing all the header files needed to build plugins. <p>On most systems, you can query this <code>plugin</code> directory by invoking <samp><span class="command">gcc -print-file-name=plugin</span></samp> (replace if needed <samp><span class="command">gcc</span></samp> with the appropriate program path). <p>Inside plugins, this <code>plugin</code> directory name can be queried by calling <code>default_plugin_dir_name ()</code>. <p>Plugins may know, when they are compiled, the GCC version for which <samp><span class="file">plugin-version.h</span></samp> is provided. The constant macros <code>GCCPLUGIN_VERSION_MAJOR</code>, <code>GCCPLUGIN_VERSION_MINOR</code>, <code>GCCPLUGIN_VERSION_PATCHLEVEL</code>, <code>GCCPLUGIN_VERSION</code> are integer numbers, so a plugin could ensure it is built for GCC 4.7 with <pre class="smallexample"> #if GCCPLUGIN_VERSION != 4007 #error this GCC plugin is for GCC 4.7 #endif </pre> <p>The following GNU Makefile excerpt shows how to build a simple plugin: <pre class="smallexample"> HOST_GCC=g++ TARGET_GCC=gcc PLUGIN_SOURCE_FILES= plugin1.c plugin2.cc GCCPLUGINS_DIR:= $(shell $(TARGET_GCC) -print-file-name=plugin) CXXFLAGS+= -I$(GCCPLUGINS_DIR)/include -fPIC -fno-rtti -O2 plugin.so: $(PLUGIN_SOURCE_FILES) $(HOST_GCC) -shared $(CXXFLAGS) $^ -o $@ </pre> <p>A single source file plugin may be built with <code>g++ -I`gcc -print-file-name=plugin`/include -fPIC -shared -fno-rtti -O2 plugin.c -o plugin.so</code>, using backquote shell syntax to query the <samp><span class="file">plugin</span></samp> directory. <p>When a plugin needs to use <samp><span class="command">gengtype</span></samp>, be sure that both <samp><span class="file">gengtype</span></samp> and <samp><span class="file">gtype.state</span></samp> have the same version as the GCC for which the plugin is built. <!-- Copyright (C) 2010-2015 Free Software Foundation, Inc. --> <!-- This is part of the GCC manual. --> <!-- For copying conditions, see the file gcc.texi. --> <!-- Contributed by Jan Hubicka <jh@suse.cz> and --> <!-- Diego Novillo <dnovillo@google.com> --> </body></html>