交叉编译 wxGtk

Question

我必须交叉编译 wxGtk（旧版本：2.8.11）并设法设置环境以便configure成功运行。

$ export CC=/opt/my_toolchain/toolchain_base/bin/i686-pc-linux-gnu-gcc
$ export CXX=/opt/my_toolchain/toolchain_base/bin/i686-pc-linux-gnu-g++
$ export CPPFLAGS=-I/opt/my_toolchain/additional_libs/usr/include/
$ export PKG_CONFIG_SYSROOT_DIR=/opt/my_toolchain/additional_libs/
$ export PKG_CONFIG_PATH=/opt/my_toolchain/additional_libs/usr/lib/pkgconfig
$ export PKG_CONFIG_DIR=/opt/my_toolchain/additional_libs/usr/lib/pkgconfig
$ export PKG_CONFIG_LIBDIR=/opt/my_toolchain/additional_libs/sysroot/usr/lib/
// LDFLAGS evtl falsch?? nicht ueberschreiben!?
$ export LDFLAGS="-L/opt/my_toolchain/additional_libs/lib/ -L/opt/my_toolchain/additional_libs/usr/lib/"
$ export CFLAGS="-Wl,-rpath-link=/opt/my_toolchain/additional_libs/lib/ -Wl,-rpath-link=/opt/my_toolchain/additional_libs/usr/lib/"
$ export CXXFLAGS="-Wl,-rpath-link=/opt/my_toolchain/additional_libs/lib/ -Wl,-rpath-link=/opt/my_toolchain/additional_libs/usr/lib/"
$ export LD_LIBRARY_PATH=/opt/my_toolchain/additional_libs/lib/:/opt/my_toolchain/additional_libs/usr/lib/:/opt/my_toolchain/additional_libs/usr/lib/:/opt/my_toolchain/additional_libs/lib/
$ pkg-config --define-variable=pc_path=/opt/my_toolchain/additional_libs/usr/lib/pkgconfig pkg-config

wxGTK-2.8.11 $ ./configure --enable-unicode --disable-shared --prefix=/usr/local/<targetname>
[...]
Configured wxWidgets 2.8.11 for `x86_64-unknown-linux-gnu'

Which GUI toolkit should wxWidgets use?                 GTK+ 2
Should wxWidgets be compiled into single library?       no
Should wxWidgets be compiled in debug mode?             no
Should wxWidgets be linked as a shared library?         no
Should wxWidgets be compiled in Unicode mode?           yes
What level of wxWidgets compatibility should be enabled?
                                   wxWidgets 2.4      no
                                   wxWidgets 2.6      yes
Which libraries should wxWidgets use?
                                   jpeg               sys
                                   png                sys
                                   regex              builtin
                                   tiff               sys
                                   zlib               sys
                                   odbc               no
                                   expat              sys
                                   libmspack          no
                                   sdl                no

但是随后的make报告错误：

wxGTK-2.8.11 $ make
[...]
bk-make-pch ./.pch/wxprec_netlib/wx/wxprec.h.gch wx/wxprec.h /opt/my_toolchain/toolchain_base/bin/i686-pc-linux-gnu-g++ -I./.pch/wxprec_netlib -D__WXGTK__     -DWXBUILDING      -I./src/regex  -DwxUSE_GUI=0 -D_FILE_OFFSET_BITS=64 -D_LARGE_FILES -I/mnt/cifs/osb_m/10_Competence_Centers/21_CC_IE/22_Kunden_Technik_Aktiv/Holmer/Software/Holmer_VT-Server/wxGTK-2.8.11/lib/wx/include/gtk2-unicode-release-static-2.8 -I./include -pthread -I/opt/my_toolchain/additional_libs//usr/include/gtk-2.0 -I/opt/my_toolchain/additional_libs//usr/lib/gtk-2.0/include -I/opt/my_toolchain/additional_libs//usr/include/pango-1.0 -I/opt/my_toolchain/additional_libs//usr/include/atk-1.0 -I/opt/my_toolchain/additional_libs//usr/include/cairo -I/opt/my_toolchain/additional_libs//usr/include/pixman-1 -I/opt/my_toolchain/additional_libs//usr/include/libpng16 -I/opt/my_toolchain/additional_libs//usr/include/gdk-pixbuf-2.0 -I/opt/my_toolchain/additional_libs//usr/include/libpng16 -I/opt/my_toolchain/additional_libs//usr/include/pango-1.0 -I/opt/my_toolchain/additional_libs//usr/include/harfbuzz -I/opt/my_toolchain/additional_libs//usr/include/pango-1.0 -I/opt/my_toolchain/additional_libs//usr/include/freetype2 -I/opt/my_toolchain/additional_libs//usr/include/glib-2.0 -I/opt/my_toolchain/additional_libs//usr/lib/glib-2.0/include -I/opt/my_toolchain/additional_libs/usr/include/ -DWX_PRECOMP -pthread -Wall -Wundef -Wno-ctor-dtor-privacy -O2 -fno-strict-aliasing -Wl,-rpath-link=/opt/my_toolchain/additional_libs/lib/ -Wl,-rpath-link=/opt/my_toolchain/additional_libs/usr/lib/
In file included from /opt/my_toolchain/additional_libs/usr/include/math.h:46:0,
             from ./include/wx/math.h:19,
             from ./include/wx/wx.h:30,
             from ./include/wx/wxprec.h:68:
/opt/my_toolchain/additional_libs/usr/include/bits/mathdef.h:47:6: warning: "__FP_FAST_FMA" is not defined [-Wundef]
/opt/my_toolchain/additional_libs/usr/include/bits/mathdef.h:51:6: warning: "__FP_FAST_FMAF" is not defined [-Wundef]
/opt/my_toolchain/additional_libs/usr/include/bits/mathdef.h:55:6: warning: "__FP_FAST_FMAL" is not defined [-Wundef]
/opt/my_toolchain/toolchain_base/bin/../i686-pc-linux-gnu/libc/usr/lib/crt1.o: In function `_start':
(.text+0x18): undefined reference to `main'
collect2: error: ld returned 1 exit status
Makefile:12022: recipe for target '.pch/wxprec_netlib/wx/wxprec.h.gch' failed
make: *** [.pch/wxprec_netlib/wx/wxprec.h.gch] Error 1

我已经打印了报告问题的编译器命令：

/opt/my_toolchain/toolchain_base/bin/i686-pc-linux-gnu-g++ \
-I./.pch/wxprec_baselib -D__WXGTK__ -DWXBUILDING \
-I./src/regex \
-DwxUSE_GUI=0 -DwxUSE_BASE=1 -D_FILE_OFFSET_BITS=64 -D_LARGE_FILES \
-I/path/to/wxGTK-2.8.11/lib/wx/include/gtk2-unicode-release-static-2.8 \
-I./include \
-pthread \
-I/opt/my_toolchain/additional_libs//usr/include/gtk-2.0 \
-I/opt/my_toolchain/additional_libs//usr/lib/gtk-2.0/include \
-I/opt/my_toolchain/additional_libs//usr/include/pango-1.0 \
-I/opt/my_toolchain/additional_libs//usr/include/atk-1.0 \
-I/opt/my_toolchain/additional_libs//usr/include/cairo \
-I/opt/my_toolchain/additional_libs//usr/include/pixman-1 \
-I/opt/my_toolchain/additional_libs//usr/include/libpng16 \
-I/opt/my_toolchain/additional_libs//usr/include/gdk-pixbuf-2.0 \
-I/opt/my_toolchain/additional_libs//usr/include/libpng16 \
-I/opt/my_toolchain/additional_libs//usr/include/pango-1.0 \
-I/opt/my_toolchain/additional_libs//usr/include/harfbuzz \
-I/opt/my_toolchain/additional_libs//usr/include/pango-1.0 \
-I/opt/my_toolchain/additional_libs//usr/include/freetype2 \
-I/opt/my_toolchain/additional_libs//usr/include/glib-2.0 \
-I/opt/my_toolchain/additional_libs//usr/lib/glib-2.0/include \
-I/opt/my_toolchain/additional_libs/usr/include/ \
-DWX_PRECOMP -pthread -Wall -Wundef -Wno-ctor-dtor-privacy -O2 -fno-strict-aliasing \
-Wl,-rpath-link=/opt/my_toolchain/additional_libs/lib/ \
-Wl,-rpath-link=/opt/my_toolchain/additional_libs/usr/lib/ \
-o ./.pch/wxprec_baselib/wx/wxprec.h.gch \
-MMD -MF \
./.deps/___pch_wxprec_baselib_wx_wxprec_h_gch.d \
./include/wx/wxprec.h

如果我从该编译器命令中删除两个-Wl,-rpath-link=语句并手动调用它，则该命令成功。

似乎额外的-Wl语句使编译器错过了带有main() -函数的源文件（这似乎是通过./include/wx/wxprec.h提供的），但我真的不明白这是怎么发生的.

对于如何解决此问题的任何建议，我将不胜感激。

更新

configure -Script 有通常的选项（没有--source ）

--build=BUILD     configure for building on BUILD [guessed]
--host=HOST       cross-compile to build programs to run on HOST [BUILD]
--target=TARGET   configure for building compilers for TARGET [HOST]

其中--target不感兴趣。 我必须检查的其他选项。 正如我在评论中提到的，到目前为止，我只看到它们与前缀一起使用，例如aarch64-linux-gnu用于来自$PATH中 package 存储库的工具链，以及相应的库等。

因此，我已将工具链二进制文件的文件夹添加到路径并配置为

./configure --enable-unicode --disable-shared --prefix=/usr/local/<target> --host=i686-pc-linux-gnu


configure: WARNING: If you wanted to set the --build type, don't use --host.
If a cross compiler is detected then cross compile mode will be used.
checking build system type... x86_64-unknown-linux-gnu
checking host system type... i686-pc-linux-gnu
checking target system type... i686-pc-linux-gnu

这看起来是正确的。 我想在我的本地机器上为另一个目标构建。

但：

checking for GTK+ - version >= 2.0.0... no
*** Could not run GTK+ test program, checking why...
*** The test program failed to compile or link. See the file config.log for the
*** exact error that occured. This usually means GTK+ is incorrectly installed.
configure: error:
The development files for GTK+ were not found. For GTK+ 2, please
ensure that pkg-config is in the path and that gtk+-2.0.pc is
installed. For GTK+ 1.2 please check that gtk-config is in the path,
and that the version is 1.2.3 or above. Also check that the
libraries returned by 'pkg-config gtk+-2.0 --libs' or 'gtk-config
--libs' are in the LD_LIBRARY_PATH or equivalent.

不幸的是，这是有道理的。 工具链本身只有一些库，但没有 GTK 库。

/opt/my_toolchain/toolchain_base/

GTK 库和其他库位于单独的文件夹中：

/opt/my_toolchain/additional_libs/

并且工具链的二进制文件不知道这个文件夹。

我认为整个问题的出现是因为 wxGtk 为host = i686-pc-linux-gnu构建库，但也为build-system = x86_64-unknown-linux-gnu构建可执行文件（例如wx-config ）。

Answer 1

wxGtk 2.8.11 交叉构建最终使用以下设置：

export PATH=/opt/my_toolchain/toolchain_base/bin/:${PATH}
export PKG_CONFIG_SYSROOT_DIR=/opt/my_toolchain/additional_libs
export PKG_CONFIG_PATH=/opt/my_toolchain/additional_libs/usr/lib/pkgconfig
export PKG_CONFIG_ALLOW_SYSTEM_CFLAGS=1
# make sure those env vars are not left from previous setup
unset  CC
unset  CXX
unset  CPPFLAGS
unset  CFLAGS
unset  CXXFLAGS
unset  LD_LIBRARY_PATH
unset  LDFLAGS
unset  PKG_CONFIG_DIR
unset  PKG_CONFIG_LIBDIR

./configure --enable-unicode --disable-shared --prefix=/usr/local/<target> --host=i686-pc-linux-gnu --build=x86_64-linux-gnu
make
sudo make install