在 linux 上交叉編譯 windows 不會 output Z5884E40D596AD370BE5406F2711

Question

compile on linux for windows such that it outputs a windows DLL fuil that can be run natively on windows (no need for cygwin or anything like that). 基本上就像我在 windows 盒子上運行編譯一樣，我寧願避免。

我嘗試了很多東西，其中大部分似乎都可以成功編譯，給我留下了 *.la 或 *.so 文件，而從來沒有 *.dll。

我的 configure.ac 文件：

AC_INIT([libaparapi], [1.4.2], [syncleus@syncleus.com])
AC_ENABLE_SHARED(yes)
AC_ENABLE_STATIC(no)
LT_INIT
AC_CONFIG_MACRO_DIRS([m4])
AM_INIT_AUTOMAKE([subdir-objects])
AC_PROG_CXX
AC_CONFIG_FILES([Makefile])
AC_CANONICAL_HOST
case $host_os in
  darwin* )
        AC_LDFLAGS="-framework OpenCL -version-info 5:2:4"
    AC_CPPFLAGS="-Iinclude -I/opt/AMDAPP/SDK/include -Isrc/cpp -Isrc/cpp/runKernel -Isrc/cpp/invoke -I${JAVA_HOME}/include/darwin -I${JAVA_HOME}/include -I/System/Library/Frameworks/JavaVM.framework/Versions/Current/Headers/ -DCL_USE_DEPRECATED_OPENCL_1_1_APIS"
        ;;
  mingw*)
        AC_LDFLAGS="-no-undefined -lOpenCL -version-info 5:2:4  -no-undefined"
          AC_CPPFLAGS="-Iinclude -I/opt/AMDAPP/SDK/include -Isrc/cpp -Isrc/cpp/runKernel -Isrc/cpp/invoke -I/usr/lib/jvm/java-11-openjdk-amd64/include -I/usr/lib/jvm/java-11-openjdk-amd64/include/linux -I/usr/lib/jvm/java-8-openjdk/include -I/usr/lib/jvm/java-8-openjdk/include/linux -I/usr/lib/jvm/java-8-openjdk-amd64/include -I/usr/lib/jvm/java-8-openjdk-amd64/include/linux -I/usr/lib/jvm/java-8-oracle/include -I/usr/lib/jvm/java-8-oracle/include/linux -I/System/Library/Frameworks/JavaVM.framework/Versions/Current/Headers/ -DCL_USE_DEPRECATED_OPENCL_1_1_APIS -fpermissive"
        ;;
  *)
        AC_LDFLAGS="-lOpenCL -version-info 5:2:4  -no-undefined"
    AC_CPPFLAGS="-Iinclude -I/opt/AMDAPP/SDK/include -Isrc/cpp -Isrc/cpp/runKernel -Isrc/cpp/invoke -I/usr/lib/jvm/default/include -I/usr/lib/jvm/default/include/linux -I/usr/lib/jvm/default-java/include -I/usr/lib/jvm/default-java/include/linux -I/usr/lib/jvm/java-8-openjdk/include -I/usr/lib/jvm/java-8-openjdk/include/linux -I/usr/lib/jvm/java-8-openjdk-amd64/include -I/usr/lib/jvm/java-8-openjdk-amd64/include/linux -I/usr/lib/jvm/java-8-oracle/include -I/usr/lib/jvm/java-8-oracle/include/linux -I/System/Library/Frameworks/JavaVM.framework/Versions/Current/Headers/ -DCL_USE_DEPRECATED_OPENCL_1_1_APIS  -fpermissive"
        ;;
esac
AC_SUBST(AC_LDFLAGS)
AC_SUBST(AC_CPPFLAGS)
AC_OUTPUT

在上述情況下，它似乎是引發了*) ) 情況，可以忽略ming*)情況，它是早期嘗試失敗的一部分，因此未在此處調用。

我的 makefile.am：

ACLOCAL_AMFLAGS = -I m4
AUTOMAKE_OPTIONS = foreign
EXTRA_DIST = include src/cpp/CLHelper.h src/cpp/classtools.h src/cpp/invoke/JavaArgs.h src/cpp/invoke/OpenCLMem.h src/cpp/invoke/OpenCLKernel.h src/cpp/invoke/OpenCLJNI.h src/cpp/invoke/OpenCLArgDescriptor.h src/cpp/invoke/OpenCLProgram.h src/cpp/CLException.h src/cpp/JNIHelper.h src/cpp/Common.h src/cpp/runKernel/KernelArg.h src/cpp/runKernel/Range.h src/cpp/runKernel/ProfileInfo.h src/cpp/runKernel/AparapiBuffer.h src/cpp/runKernel/Config.h src/cpp/runKernel/Aparapi.h src/cpp/runKernel/ArrayBuffer.h src/cpp/runKernel/JNIContext.h src/cpp/runKernel/List.h
lib_LTLIBRARIES = libaparapi.la
libaparapi_la_CPPFLAGS = $(AC_CPPFLAGS)
libaparapi_la_LDFLAGS = $(AC_LDFLAGS)
libaparapi_la_SOURCES = src/cpp/runKernel/Aparapi.cpp src/cpp/runKernel/ArrayBuffer.cpp src/cpp/runKernel/AparapiBuffer.cpp src/cpp/runKernel/Config.cpp src/cpp/runKernel/JNIContext.cpp src/cpp/runKernel/KernelArg.cpp src/cpp/runKernel/ProfileInfo.cpp src/cpp/runKernel/Range.cpp src/cpp/invoke/OpenCLJNI.cpp src/cpp/invoke/OpenCLArgDescriptor.cpp src/cpp/invoke/OpenCLMem.cpp src/cpp/CLHelper.cpp src/cpp/classtools.cpp src/cpp/JNIHelper.cpp src/cpp/agent.cpp
all-local:

我嘗試使用dockcross，但遇到了與本地執行相同的問題，因此我不共享我調用的本地編譯命令。 正如您在下面看到的，我安裝了 clang 用於交叉編譯，因為我被告知這是獲得真正原生 DLL 的唯一方法，像 mingw 這樣的東西需要 ZEFE90A8E604A7C840E88D03A67F6B7DZ 庫在大多數靜態庫中工作。

git clean -xdf
cp -r ../include/ .
mkdir -p m4
aclocal --force
libtoolize --force --copy
automake --foreign --add-missing --copy --force
autoconf --force
CC=clang ./configure --target=windows-shared-x64
CC=clang make && ls .libs

運行以下是配置階段的 output 時，運行上述命令時不會產生錯誤，因此它是唯一相關的花絮。

checking build system type... x86_64-pc-linux-gnu
checking host system type... x86_64-pc-linux-gnu
checking how to print strings... printf
checking for gcc... clang
checking whether the C compiler works... yes
checking for C compiler default output file name... a.out
checking for suffix of executables... 
checking whether we are cross compiling... no
checking for suffix of object files... o
checking whether we are using the GNU C compiler... yes
checking whether clang accepts -g... yes
checking for clang option to accept ISO C89... none needed
checking whether clang understands -c and -o together... yes
checking for a sed that does not truncate output... /usr/bin/sed
checking for grep that handles long lines and -e... /usr/bin/grep
checking for egrep... /usr/bin/grep -E
checking for fgrep... /usr/bin/grep -F
checking for ld used by clang... /usr/bin/ld
checking if the linker (/usr/bin/ld) is GNU ld... yes
checking for BSD- or MS-compatible name lister (nm)... /usr/bin/nm -B
checking the name lister (/usr/bin/nm -B) interface... BSD nm
checking whether ln -s works... yes
checking the maximum length of command line arguments... 1572864
checking how to convert x86_64-pc-linux-gnu file names to x86_64-pc-linux-gnu format... func_convert_file_noop
checking how to convert x86_64-pc-linux-gnu file names to toolchain format... func_convert_file_noop
checking for /usr/bin/ld option to reload object files... -r
checking for objdump... objdump
checking how to recognize dependent libraries... pass_all
checking for dlltool... no
checking how to associate runtime and link libraries... printf %s\n
checking for ar... ar
checking for archiver @FILE support... @
checking for strip... strip
checking for ranlib... ranlib
checking for gawk... gawk
checking command to parse /usr/bin/nm -B output from clang object... ok
checking for sysroot... no
checking for a working dd... /usr/bin/dd
checking how to truncate binary pipes... /usr/bin/dd bs=4096 count=1
checking for mt... no
checking if : is a manifest tool... no
checking how to run the C preprocessor... clang -E
checking for ANSI C header files... yes
checking for sys/types.h... yes
checking for sys/stat.h... yes
checking for stdlib.h... yes
checking for string.h... yes
checking for memory.h... yes
checking for strings.h... yes
checking for inttypes.h... yes
checking for stdint.h... yes
checking for unistd.h... yes
checking for dlfcn.h... yes
checking for objdir... .libs
checking if clang supports -fno-rtti -fno-exceptions... yes
checking for clang option to produce PIC... -fPIC -DPIC
checking if clang PIC flag -fPIC -DPIC works... yes
checking if clang static flag -static works... yes
checking if clang supports -c -o file.o... yes
checking if clang supports -c -o file.o... (cached) yes
checking whether the clang linker (/usr/bin/ld -m elf_x86_64) supports shared libraries... yes
checking whether -lc should be explicitly linked in... no
checking dynamic linker characteristics... GNU/Linux ld.so
checking how to hardcode library paths into programs... immediate
checking whether stripping libraries is possible... yes
checking if libtool supports shared libraries... yes
checking whether to build shared libraries... yes
checking whether to build static libraries... no
checking for a BSD-compatible install... /usr/bin/install -c
checking whether build environment is sane... yes
checking for a thread-safe mkdir -p... /usr/bin/mkdir -p
checking whether make sets $(MAKE)... yes
checking whether make supports the include directive... yes (GNU style)
checking whether make supports nested variables... yes
checking dependency style of clang... gcc3
checking for g++... g++
checking whether we are using the GNU C++ compiler... yes
checking whether g++ accepts -g... yes
checking how to run the C++ preprocessor... g++ -E
checking for ld used by g++... /usr/bin/ld -m elf_x86_64
checking if the linker (/usr/bin/ld -m elf_x86_64) is GNU ld... yes
checking whether the g++ linker (/usr/bin/ld -m elf_x86_64) supports shared libraries... yes
checking for g++ option to produce PIC... -fPIC -DPIC
checking if g++ PIC flag -fPIC -DPIC works... yes
checking if g++ static flag -static works... yes
checking if g++ supports -c -o file.o... yes
checking if g++ supports -c -o file.o... (cached) yes
checking whether the g++ linker (/usr/bin/ld -m elf_x86_64) supports shared libraries... yes
checking dynamic linker characteristics... (cached) GNU/Linux ld.so
checking how to hardcode library paths into programs... immediate
checking dependency style of g++... gcc3
checking that generated files are newer than configure... done
configure: creating ./config.status
config.status: creating Makefile
config.status: executing libtool commands
config.status: executing depfiles commands

最后，最后的 ls 命令清楚地顯示沒有產生 DLL：

libaparapi.la  libaparapi.lai  libaparapi.so  libaparapi.so.1  libaparapi.so.1.4.2

知道我做錯了什么嗎？ 我對交叉編譯很陌生。

Answer 1

如果允許未定義的符號，GCC 無法構建 Windows DLL。 您通常可以通過在./configure行的末尾添加LDFLAGS="-Wl,-no-undefined"來解決此問題。 但是我已經看到了一些沒有幫助的情況，但是在./configure之后運行這一行可以修復它：

sed -i.bak -e "s/\(allow_undefined=\)yes/\1no/" libtool

然后是導入部分，您實際上必須將函數聲明為dllexport 。 一種方法是在 header 文件的頂部添加類似這樣的內容：

# if defined(_WIN32) && (defined(BUILD_MYLIB_DLL) || defined (MyLib_EXPORT))
#  define DLL_EXPORT_MYLIB __declspec(dllexport)
# elif defined(_WIN32) && !defined(STATIC) && !defined(BUILD_MYLIB_STATIC) && !defined(BUILD_MYLIB)
#  define DLL_EXPORT_MYLIB __declspec(dllimport)
# else
#  define DLL_EXPORT_MYLIB
# endif
#endif

然后在定義每個 function 之前添加DLL_EXPORT_MYLIB ，您需要從 DLL 獲得。 例如：

DLL_EXPORT_MYLIB const char* mylib_get_version ();

由於上述 header 代碼僅在定義BUILD_MYLIB_DLL時導出，您還需要在./configure行的末尾添加CFLAGS="-DBUILD_MYLIB_DLL"和/或CXXFLAGS="-DBUILD_MYLIB_DLL" 。

請注意，還有其他方法（例如使用.def文件）來構建 DLL，但我發現這是最干凈、最便攜的方法，尤其是在使用 autoconf 工具時。

您是否考慮過使用 CMake？

使用 CMake 時要容易一些。 只需將SHARED添加到add_library()命令即可。 盡管如此，仍然需要上面的 header 修改。 例如 CMakeLists.txt 中的這一行：

add_library(MyLib SHARED mylib.c)

將自動嘗試構建 DLL 並在 C/C++ 中定義MyLib_EXPORT ，以便可以在 header 文件中檢測到它以使用 dllexport。

Answer 2

因此，您似乎將目標設置為 windows，而不是主機，因此所有內容都設置為 Linux 上的主機，因此生成了.so 文件。 目標三元組證明 --target 看起來也不正確。 執行configure --host=x86_64-w64-mingw32可能會解決問題。