我正在将一个 gnome 面板小程序转换为 xfce 面板插件。到目前为止，我已经删除了源代码中的几个 gnome 特定部分，并酌情将它们替换为 xfce 特定源代码。
我使用天气插件和示例插件等模板创建了 makefile.am 和 configure.ac 文件。但是我没有成功地正确编译它。我可能遗漏了一些明显的东西，但我用自己的文件仔细检查了示例，没有发现明显的问题。
我附上了适当的文件以及错误的输出，希望有人有想法。我不认为问题出在实际来源中，但如有必要，我可以稍后添加一些内容。
编译时出错:
make all-recursive
make[1]: Entering directory `/source/my_example_xfce'
Making all in panel-plugin
make[2]: Entering directory `/source/my_example_xfce/panel-plugin'
gcc -DHAVE_CONFIG_H -I. -I.. -I.. -DTHEMESDIR=\"/usr/local/share/xfce4/my_example/icons\" -DPACKAGE_LOCALE_DIR=\"/usr/local/share/locale\" -DG_LOG_DOMAIN=\"my_example\" -DNDEBUG -pthread -I/usr/include/xfce4/libxfce4panel-1.0 -I/usr/include/gtk-2.0 -I/usr/include/glib-2.0 -I/usr/lib/x86_64-linux-gnu/glib-2.0/include -I/usr/lib/x86_64-linux-gnu/gtk-2.0/include -I/usr/include/atk-1.0 -I/usr/include/cairo -I/usr/include/gdk-pixbuf-2.0 -I/usr/include/pango-1.0 -I/usr/include/gio-unix-2.0/ -I/usr/include/pixman-1 -I/usr/include/freetype2 -I/usr/include/libpng12 -I/usr/include/xfce4 -pthread -I/usr/include/gtk-2.0 -I/usr/lib/x86_64-linux-gnu/gtk-2.0/include -I/usr/include/gio-unix-2.0/ -I/usr/include/cairo -I/usr/include/pango-1.0 -I/usr/include/gdk-pixbuf-2.0 -I/usr/include/glib-2.0 -I/usr/lib/x86_64-linux-gnu/glib-2.0/include -I/usr/include/pixman-1 -I/usr/include/freetype2 -I/usr/include/libpng12 -I/usr/include/atk-1.0 -I/usr/include/xfce4 -I/usr/include/glib-2.0 -I/usr/lib/x86_64-linux-gnu/glib-2.0/include -I/usr/include/xfce4 -pthread -I/usr/include/gtk-2.0 -I/usr/lib/x86_64-linux-gnu/gtk-2.0/include -I/usr/include/atk-1.0 -I/usr/include/cairo -I/usr/include/gdk-pixbuf-2.0 -I/usr/include/pango-1.0 -I/usr/include/gio-unix-2.0/ -I/usr/include/glib-2.0 -I/usr/lib/x86_64-linux-gnu/glib-2.0/include -I/usr/include/pixman-1 -I/usr/include/freetype2 -I/usr/include/libpng12 -g -O2 -MT xfce4_my_example_plugin-my_example.o -MD -MP -MF .deps/xfce4_my_example_plugin-my_example.Tpo -c -o xfce4_my_example_plugin-my_example.o `test -f 'my_example.c' || echo './'`my_example.c
my_example.c:25:25: warning: ‘struct Example_Data’ declared inside parameter list [enabled by default]
my_example.c:25:25: warning: its scope is only this definition or declaration, which is probably not what you want [enabled by default]
my_example.c: In function ‘setdefaults’:
my_example.c:28:3: warning: incompatible implicit declaration of built-in function ‘strncpy’ [enabled by default]
my_example.c:28:21: error: dereferencing pointer to incomplete type
my_example.c:28:45: warning: incompatible implicit declaration of built-in function ‘strlen’ [enabled by default]
my_example.c:28:3: warning: passing argument 1 of ‘strlen’ makes pointer from integer without a cast [enabled by default]
my_example.c:28:3: note: expected ‘const char *’ but argument is of type ‘int’
my_example.c:28:3: warning: passing argument 2 of ‘strncpy’ makes pointer from integer without a cast [enabled by default]
my_example.c:28:3: note: expected ‘const char *’ but argument is of type ‘int’
my_example.c:30:21: error: dereferencing pointer to incomplete type
my_example.c:30:42: error: dereferencing pointer to incomplete type
my_example.c:30:67: error: dereferencing pointer to incomplete type
my_example.c:31:3: warning: incompatible implicit declaration of built-in function ‘strncat’ [enabled by default]
my_example.c:31:21: error: dereferencing pointer to incomplete type
my_example.c:31:32: error: ‘SIGFILE’ undeclared (first use in this function)
SIGFILE 是我的头文件中的定义之一。然后它继续进行，就好像它从未读取过我的包含所有声明的头文件一样。
最后一点:
my_example.c:248:17: error: unknown type name ‘XfcePanelPlugin’
my_example.c:248:42: error: unknown type name ‘GtkWidget’
my_example.c:248:60: error: unknown type name ‘GtkWidget’
make[2]: *** [xfce4_my_example_plugin-example.o] Error 1
make[2]: Leaving directory `/source/my_example_xfce/panel-plugin'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/source/my_example_xfce'
make: *** [all] Error 2
我在下面粘贴了 xfce4 xdt-autogen 工具所需的 Makefile.am、configure.ac 和 panel-plugin/Makefile.am，当在源目录中运行时，它将生成适当的 make 和配置文件。
***************
* Makefile.am *
***************
SUBDIRS = \
panel-plugin \
po
AUTOMAKE_OPTIONS = \
1.8 \
dist-bzip2
*****************
* configure.ac *
*****************
dnl Version information
m4_define([my_example_version_major], [1])
m4_define([my_example_version_minor], [3])
m4_define([my_example_version_micro], [0])
m4_define([my_example_version], [my_example_version_major().my_example_version_minor().my_example_version_micro()])
dnl Initialize autoconf
AC_COPYRIGHT([Copyright (c) 2013
Example <bug@example.org>])
AC_INIT([xfce4-my_example-plugin], [my_example_version()], [bug@example.org])
AC_PREREQ([2.50])
dnl Initialize automake
AM_INIT_AUTOMAKE([1.8 dist-bzip2 tar-ustar])
AM_CONFIG_HEADER([config.h])
AM_MAINTAINER_MODE()
dnl Check for basic programs
AC_PROG_CC()
AC_PROG_LD()
AC_PROG_INSTALL()
AC_PROG_INTLTOOL()
AC_PROG_LIBTOOL()
AM_PROG_CC_C_O()
dnl Check for standard headers
AC_HEADER_STDC()
AC_CHECK_HEADERS([string.h fcntl.h errno.h sys/socket.h netdb.h \
netinet/in.h sys/types.h time.h unistd.h stdio.h \
sys/stat.h stddef.h stdlib.h netinet/in.h])
dnl Check for i18n support
XDT_I18N([])
dnl Check for required packages
XDT_CHECK_PACKAGE([GTK], [gtk+-2.0], [2.6.0])
XDT_CHECK_PACKAGE([GTHREAD], [gthread-2.0], [2.6.0])
XDT_CHECK_PACKAGE([LIBXFCE4UTIL], [libxfce4util-1.0], [4.3.90.2])
XDT_CHECK_PACKAGE([LIBXFCEGUI4], [libxfcegui4-1.0], [4.3.90.2])
XDT_CHECK_PACKAGE([LIBXFCE4PANEL], [libxfce4panel-1.0], [4.3.99.1])
dnl Check for debugging support
XDT_FEATURE_DEBUG()
AC_OUTPUT([
Makefile
po/Makefile.in
panel-plugin/Makefile
])
****************************
* panel-plugin/Makefile.am *
****************************
INCLUDES = \
-I$(top_srcdir) \
-DTHEMESDIR=\"$(datadir)/xfce4/my_example/icons\" \
-DPACKAGE_LOCALE_DIR=\"$(localedir)\" \
-DG_LOG_DOMAIN=\"my_example\"
plugin_PROGRAMS = \
xfce4-my_example-plugin
plugindir = $(libexecdir)/xfce4/panel-plugins
xfce4_my_example_plugin_SOURCES = \
my_example_dat.h \
my_example_func.h \
my_example_images.h \
my_example_applet.c \
my_example.c \
my_example_processdata.c \
my_example_menu.c
xfce4_my_example_plugin_CFLAGS = \
$(LIBXFCE4PANEL_CFLAGS) \
$(LIBXFCEGUI4_CFLAGS) \
$(LIBXFCE4UTIL_CFLAGS) \
$(GTK_CFLAGS)
xfce4_my_example_plugin_LDADD = \
$(LIBXFCE4PANEL_LIBS) \
$(LIBXFCE4UTIL_LIBS) \
$(LIBXFCEGUI4_LIBS) \
$(GTK_LIBS)
desktopdir = $(datadir)/xfce4/panel-plugins
desktop_DATA = \
my_example.desktop
@INTLTOOL_DESKTOP_RULE@
EXTRA_DIST = \
my_example.desktop.in
CLEANFILES = \
$(desktop_DATA)
# vi:set ts=8 sw=8 noet ai nocindent syntax=automake:
我的源文件中确实包含正确的头文件，此外源文件在进行 xfce4 相关更改之前编译良好。
生成文件.am
xfce4_my_example_plugin_SOURCES = \
example_dat.h \
example_func.h \
example_images.h \
example_applet.c \
example.c \
example_processdata.c \
example_menu.c
来自 example_applet.c，这是输入的第一个源文件。最初我只有“xfce4_my_example_plugin_SOURCES = example_applet.c”，因为其余部分可以通过该文件找到。它给出了同样的错误。
#include <gtk/gtk.h>
#include <glib-object.h>
#include <string.h>
#include <libxfce4util/libxfce4util.h>
#include <libxfce4panel/xfce-panel-plugin.h>
#include <libxfce4panel/xfce-hvbox.h>
#include "example_dat.h" /* contains all structures */
#include "example_func.h" /* contains all function prototypes used in this program */
#include "example_images.h"
#include "example.c"
#include "example_processdata.c"
#include "example_menu.c"
/* register the xfce plugin */
XFCE_PANEL_PLUGIN_REGISTER_EXTERNAL(example_applet_fill);
最佳答案
看来我解决了这个问题。 xfce 的构建过程与我用来构建 gnome 面板小程序的过程略有不同。
对于 gnome 小程序，我使用一个源文件来包含所有其他源文件和头文件。
在 xfce 中，在查看了各种插件源树之后，每个源文件都包含必要的头文件，但是没有一个源文件包含其他源文件。
解决方法是根本不包含任何其他源文件，而是更改每个源文件以包含头文件。
关于编译 XFCE4 面板插件，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/16847759/