我在Windows平台上编译objective-c源代码时遇到问题。 当然在windows平台上编译objective-c源代码，我们通常使用gnustep环境(gcc objecitve-c编译器。gnustep libojc动态库。gnustep基础框架...等等)。
但我想要一个干净的环境，尝试编译器 Objective-c ，并使用不同的 libobjc 库。
自 mac os x 10.6 起。苹果将macosx系统迁移到x86平台(不再支持ppc)，并通过cocoa tech重写系统应用程序。包括iTunes。
iTunes 有 Windows 版本。
安装iTunes.i后通过搜索系统文件夹发现任何支持dll文件:
C:\Program Files (x86)\Common Files\Apple\Apple Application Support
顺便说一下，我的系统是windows 7 x86_64。
我发现它有:
ApplePushService.dll
AppleVersions.dll
APSDaemon_main.dll
ASL.dll
AVFoundationCF.dll
CFNetwork.dll
CoreAudioToolbox.dll
CoreFoundation.dll
CoreGraphics.dll
CoreMedia.dll
CoreText.dll
CoreVideo.dll
Foundation.dll
icudt46.dll
icuin40.dll
icuuc40.dll
JavaScriptCore.dll
libcache.dll
libdispatch.dll
libicuin.dll
libicuuc.dll
libtidy.dll
libxml2.dll
libxslt.dll
MediaToolbox.dll
objc.dll
pthreadVC2.dll
QTMovieWin.dll
QuartzCore.dll
SQLite3.dll
VideoToolbox.dll
WebKit.dll
WebKitQuartzCoreAdditions.dll
YSCrashDump.dll
YSUtilities.dll
zlib1.dll
看起来，苹果将这些底层框架实现到了windows平台上。
CFNetwork.framework -> CFNetwork.dll
CoreGraphics.framework -> CoreGraphics.dll
Foundation.framework -> Foundation.dll
libobjc.a.dylib -> objc.dll
WebKit.framework -> WebKit.dll
所以，我认为使用苹果的libobjc发行版本更好(iTunes运行良好)。其他库文件也很有用。
我想为 Objective-C 初学者(我和我的同学)建立一个学习环境。
所以我复制 objc.dll 并将其重命名为 libobjc.dll
使用 mingw 工具“pexports”将 libobjc.dll 的 def 导出为 libobjc.def，然后使用 Visual Studio 命令工具“lib.exe”将 .def 文件转换为 libobjc.lib。
然后我下载
- mingw64的x86(32位)编译器dng预编译包。
- mingw64的clang+llvm(32位)编译器dng预编译包。
- mingw64的msys环境预编译包。
将这 3 个软件包安装到系统中。 然后将libobjc.dll、libobjc.lib复制到/lib(在windows平台上，.a和.lib使用相同的bin格式)。
然后我写了一个示例 Objective-C 源代码。代码在这里: 文件:test.m
#import <stdio.h>
@interface Foo {
int count;
}
+ (void)fooWithBar;
@end
@implementation Foo
+ (void)fooWithBar {
printf("abc");
}
@end
int main(){
[Foo fooWithBar];
return 0;
}
简单地编译它:
clang test.m
发生错误，然后使用 -v 选项显示详细信息:
clang version 3.1 (branches/release_31)
Target: i686-w64-mingw32
Thread model: posix
"c:/mingw64w32/bin/clang.exe" -cc1 -triple i686-w64-mingw32 -S -disable-free -main-file-name test.m -mrelocation-model static -mdisable-fp-elim -mconstructor-aliases -target-cpu pentium4 -target-linker-version 2.20.51.0.2 -momit-leaf-frame-pointer -v -resource-dir "c:/mingw64w32/bin\\..\\lib\\clang\\3.1" -fmodule-cache-path "C:/Users/Joe/AppData/Local/Temp\\clang-module-cache" -fno-dwarf-directory-asm -fdebug-compilation-dir C:/MINGW64-X86-MSYS-20111123/home/Joe -ferror-limit 19 -fmessage-length 0 -mstackrealign -fno-use-cxa-atexit -fgnu-runtime -fobjc-runtime-has-arc -fobjc-runtime-has-weak -fobjc-fragile-abi -fobjc-exceptions -fdiagnostics-show-option -o C:/Users/Joe/AppData/Local/Temp/test-709512.s -x objective-c test.m
clang -cc1 version 3.1 based upon LLVM 3.1 default target i686-w64-mingw32
ignoring nonexistent directory "/usr/local/include"
ignoring nonexistent directory "c:/mingw64w32/bin/../lib/clang/3.1/../../../x86_64-w64-mingw32/include"
ignoring nonexistent directory "/mingw/include"
ignoring nonexistent directory "c:/mingw/include"
ignoring nonexistent directory "/usr/include"
#include "..." search starts here:
#include <...> search starts here:
c:/mingw64w32/bin/../lib/clang/3.1/include
c:/mingw64w32/bin/../lib/clang/3.1/../../../i686-w64-mingw32/include
c:/mingw64w32/bin/../lib/clang/3.1/../../../include
End of search list.
"c:/mingw64w32/bin/i686-w64-mingw32-gcc.exe" -v -c -o C:/Users/Joe/AppData/Local/Temp/test-709513.o -x assembler C:/Users/Joe/AppData/Local/Temp/test-709512.s
Using built-in specs.
COLLECT_GCC=c:/mingw64w32/bin/i686-w64-mingw32-gcc.exe
Target: i686-w64-mingw32
Configured with: /home/drangon/work/mingw-w64-dgn_32/source/gcc/configure --host=i686-w64-mingw32 --target=i686-w64-mingw32 --disable-nls --enable-languages=c,c++,objc,obj-c++ --with-gmp=/home/drangon/work/mingw-w64-dgn_32/build/for_target --enable-twoprocess --disable-libstdcxx-pch --disable-win32-registry --prefix=/home/drangon/work/mingw-w64-dgn_32/target --with-sysroot=/home/drangon/work/mingw-w64-dgn_32/target
Thread model: win32
gcc version 4.7.2 20120823 (prerelease) (GCC)
COLLECT_GCC_OPTIONS='-v' '-c' '-o' 'C:/Users/Joe/AppData/Local/Temp/test-709513.o' '-mtune=generic' '-march=pentiumpro'
c:/mingw64w32/bin/../lib/gcc/i686-w64-mingw32/4.7.2/../../../../i686-w64-mingw32/bin/as.exe -v -o C:/Users/Joe/AppData/Local/Temp/test-709513.o C:/Users/Joe/AppData/Local/Temp/test-709512.s
GNU assembler version 2.23.51 (i686-w64-mingw32) using BFD version (GNU Binutils) 2.23.51.20120823
COMPILER_PATH=c:/mingw64w32/bin/../libexec/gcc/i686-w64-mingw32/4.7.2/;c:/mingw64w32/bin/../libexec/gcc/;c:/mingw64w32/bin/../lib/gcc/i686-w64-mingw32/4.7.2/../../../../i686-w64-mingw32/bin/
LIBRARY_PATH=c:/mingw64w32/bin/../lib/gcc/i686-w64-mingw32/4.7.2/;c:/mingw64w32/bin/../lib/gcc/;c:/mingw64w32/bin/../lib/gcc/i686-w64-mingw32/4.7.2/../../../../i686-w64-mingw32/lib/../lib/;c:/mingw64w32/bin/../lib/gcc/i686-w64-mingw32/4.7.2/../../../../lib/;c:/mingw64w32/bin/../lib/gcc/i686-w64-mingw32/4.7.2/../../../../i686-w64-mingw32/lib/;c:/mingw64w32/bin/../lib/gcc/i686-w64-mingw32/4.7.2/../../../
COLLECT_GCC_OPTIONS='-v' '-c' '-o' 'C:/Users/Joe/AppData/Local/Temp/test-709513.o' '-mtune=generic' '-march=pentiumpro'
"c:/mingw64w32/bin/i686-w64-mingw32-gcc.exe" -v -o a.out C:/Users/Joe/AppData/Local/Temp/test-709513.o
Using built-in specs.
COLLECT_GCC=c:/mingw64w32/bin/i686-w64-mingw32-gcc.exe
COLLECT_LTO_WRAPPER=c:/mingw64w32/bin/../libexec/gcc/i686-w64-mingw32/4.7.2/lto-wrapper.exe
Target: i686-w64-mingw32
Configured with: /home/drangon/work/mingw-w64-dgn_32/source/gcc/configure --host=i686-w64-mingw32 --target=i686-w64-mingw32 --disable-nls --enable-languages=c,c++,objc,obj-c++ --with-gmp=/home/drangon/work/mingw-w64-dgn_32/build/for_target --enable-twoprocess --disable-libstdcxx-pch --disable-win32-registry --prefix=/home/drangon/work/mingw-w64-dgn_32/target --with-sysroot=/home/drangon/work/mingw-w64-dgn_32/target
Thread model: win32
gcc version 4.7.2 20120823 (prerelease) (GCC)
COMPILER_PATH=c:/mingw64w32/bin/../libexec/gcc/i686-w64-mingw32/4.7.2/;c:/mingw64w32/bin/../libexec/gcc/;c:/mingw64w32/bin/../lib/gcc/i686-w64-mingw32/4.7.2/../../../../i686-w64-mingw32/bin/
LIBRARY_PATH=c:/mingw64w32/bin/../lib/gcc/i686-w64-mingw32/4.7.2/;c:/mingw64w32/bin/../lib/gcc/;c:/mingw64w32/bin/../lib/gcc/i686-w64-mingw32/4.7.2/../../../../i686-w64-mingw32/lib/../lib/;c:/mingw64w32/bin/../lib/gcc/i686-w64-mingw32/4.7.2/../../../../lib/;c:/mingw64w32/bin/../lib/gcc/i686-w64-mingw32/4.7.2/../../../../i686-w64-mingw32/lib/;c:/mingw64w32/bin/../lib/gcc/i686-w64-mingw32/4.7.2/../../../
COLLECT_GCC_OPTIONS='-v' '-o' 'a.out' '-mtune=generic' '-march=pentiumpro'
c:/mingw64w32/bin/../libexec/gcc/i686-w64-mingw32/4.7.2/collect2.exe --sysroot=/home/drangon/work/mingw-w64-dgn_32/target -m i386pe -Bdynamic -o a.out c:/mingw64w32/bin/../lib/gcc/i686-w64-mingw32/4.7.2/../../../../i686-w64-mingw32/lib/../lib/crt2.o c:/mingw64w32/bin/../lib/gcc/i686-w64-mingw32/4.7.2/crtbegin.o -Lc:/mingw64w32/bin/../lib/gcc/i686-w64-mingw32/4.7.2 -Lc:/mingw64w32/bin/../lib/gcc -Lc:/mingw64w32/bin/../lib/gcc/i686-w64-mingw32/4.7.2/../../../../i686-w64-mingw32/lib/../lib -Lc:/mingw64w32/bin/../lib/gcc/i686-w64-mingw32/4.7.2/../../../../lib -Lc:/mingw64w32/bin/../lib/gcc/i686-w64-mingw32/4.7.2/../../../../i686-w64-mingw32/lib -Lc:/mingw64w32/bin/../lib/gcc/i686-w64-mingw32/4.7.2/../../.. C:/Users/Joe/AppData/Local/Temp/test-709513.o -lmingw32 -lgcc_eh -lgcc -lmoldname -lmingwex -lmsvcrt -ladvapi32 -lshell32 -luser32 -lkernel32 -lmingw32 -lgcc_eh -lgcc -lmoldname -lmingwex -lmsvcrt c:/mingw64w32/bin/../lib/gcc/i686-w64-mingw32/4.7.2/crtend.o
C:/Users/Joe/AppData/Local/Temp/test-709513.o:fake:(.text+0x4d): undefined reference to `objc_lookup_class'
C:/Users/Joe/AppData/Local/Temp/test-709513.o:fake:(.text+0x62): undefined reference to `objc_msg_lookup'
C:/Users/Joe/AppData/Local/Temp/test-709513.o:fake:(.text+0x9e): undefined reference to `__objc_exec_class'
c:/mingw64w32/bin/../lib/gcc/i686-w64-mingw32/4.7.2/../../../../i686-w64-mingw32/bin/ld.exe: C:/Users/Joe/AppData/Local/Temp/test-709513.o: bad reloc address 0x14 in section `.data'
c:/mingw64w32/bin/../lib/gcc/i686-w64-mingw32/4.7.2/../../../../i686-w64-mingw32/bin/ld.exe: final link failed: Invalid operation
collect2.exe: error: ld returned 1 exit status
clang: error: linker (via gcc) command failed with exit code 1 (use -v to see invocation)
通过google搜索，我发现objc_lookup_class是gnustep的libobjc库中定义的方法。在苹果的libojbc.dll的.def文件:“libojbc.def”中，我找到了另一个名为“objc_lookUpClass”的方法。 再次谷歌搜索，所以， Apple 的 libojbc 与 gnustep 的 libobjc 不同。 苹果的 libojbc 使用 NextStep 库接口(interface)。gnustep 做了一个不同的。
man gcc
海湾合作委员会对此有两种选择。
-fgnu-runtime 。这是 gcc 的默认选项，使用 gnu 风格运行时。
-fnext-runtime ，这使用 nextstep(现在是苹果)风格运行。
所以我将下一步样式选项传递给 clang(或 gcc？)。
clang -fnext-runtime
将.o编译为.s，没有错误。似乎ld.exe从苹果的libobjc库文件中找到了它需要的所有方法。但是发生了另一个错误，使用-v选项，详细信息如下:
clang version 3.1 (branches/release_31)
Target: i686-w64-mingw32
Thread model: posix
"c:/mingw64w32/bin/clang.exe" -cc1 -triple i686-w64-mingw32 -S -disable-free -main-file-name test.m -mrelocation-model static -mdisable-fp-elim -mconstructor-aliases -target-cpu pentium4 -target-linker-version 2.20.51.0.2 -momit-leaf-frame-pointer -v -resource-dir "c:/mingw64w32/bin\\..\\lib\\clang\\3.1" -fmodule-cache-path "C:/Users/Joe/AppData/Local/Temp\\clang-module-cache" -fno-dwarf-directory-asm -fdebug-compilation-dir C:/MINGW64-X86-MSYS-20111123/home/Joe -ferror-limit 19 -fmessage-length 0 -mstackrealign -fno-use-cxa-atexit -fobjc-fragile-abi -fobjc-exceptions -fdiagnostics-show-option -o C:/Users/Joe/AppData/Local/Temp/test-467378.s -x objective-c test.m
clang -cc1 version 3.1 based upon LLVM 3.1 default target i686-w64-mingw32
ignoring nonexistent directory "/usr/local/include"
ignoring nonexistent directory "c:/mingw64w32/bin/../lib/clang/3.1/../../../x86_64-w64-mingw32/include"
ignoring nonexistent directory "/mingw/include"
ignoring nonexistent directory "c:/mingw/include"
ignoring nonexistent directory "/usr/include"
#include "..." search starts here:
#include <...> search starts here:
c:/mingw64w32/bin/../lib/clang/3.1/include
c:/mingw64w32/bin/../lib/clang/3.1/../../../i686-w64-mingw32/include
c:/mingw64w32/bin/../lib/clang/3.1/../../../include
End of search list.
"c:/mingw64w32/bin/i686-w64-mingw32-gcc.exe" -fnext-runtime -v -c -o C:/Users/Joe/AppData/Local/Temp/test-467379.o -x assembler C:/Users/Joe/AppData/Local/Temp/test-467378.s
Using built-in specs.
COLLECT_GCC=c:/mingw64w32/bin/i686-w64-mingw32-gcc.exe
Target: i686-w64-mingw32
Configured with: /home/drangon/work/mingw-w64-dgn_32/source/gcc/configure --host=i686-w64-mingw32 --target=i686-w64-mingw32 --disable-nls --enable-languages=c,c++,objc,obj-c++ --with-gmp=/home/drangon/work/mingw-w64-dgn_32/build/for_target --enable-twoprocess --disable-libstdcxx-pch --disable-win32-registry --prefix=/home/drangon/work/mingw-w64-dgn_32/target --with-sysroot=/home/drangon/work/mingw-w64-dgn_32/target
Thread model: win32
gcc version 4.7.2 20120823 (prerelease) (GCC)
COLLECT_GCC_OPTIONS='-fnext-runtime' '-v' '-c' '-o' 'C:/Users/Joe/AppData/Local/Temp/test-467379.o' '-mtune=generic' '-march=pentiumpro'
c:/mingw64w32/bin/../lib/gcc/i686-w64-mingw32/4.7.2/../../../../i686-w64-mingw32/bin/as.exe -v -o C:/Users/Joe/AppData/Local/Temp/test-467379.o C:/Users/Joe/AppData/Local/Temp/test-467378.s
GNU assembler version 2.23.51 (i686-w64-mingw32) using BFD version (GNU Binutils) 2.23.51.20120823
C:/Users/Joe/AppData/Local/Temp/test-467378.s: Assembler messages:
C:/Users/Joe/AppData/Local/Temp/test-467378.s:4: Error: unknown pseudo-op: `.lazy_reference'
C:/Users/Joe/AppData/Local/Temp/test-467378.s:57: Error: bad or irreducible absolute expression
C:/Users/Joe/AppData/Local/Temp/test-467378.s:57: Error: junk at end of line, first unrecognized character is `,'
C:/Users/Joe/AppData/Local/Temp/test-467378.s:67: Error: bad or irreducible absolute expression
C:/Users/Joe/AppData/Local/Temp/test-467378.s:67: Error: junk at end of line, first unrecognized character is `,'
C:/Users/Joe/AppData/Local/Temp/test-467378.s:76: Error: bad or irreducible absolute expression
C:/Users/Joe/AppData/Local/Temp/test-467378.s:76: Error: junk at end of line, first unrecognized character is `,'
C:/Users/Joe/AppData/Local/Temp/test-467378.s:92: Error: bad or irreducible absolute expression
C:/Users/Joe/AppData/Local/Temp/test-467378.s:92: Error: junk at end of line, first unrecognized character is `,'
C:/Users/Joe/AppData/Local/Temp/test-467378.s:99: Error: bad or irreducible absolute expression
C:/Users/Joe/AppData/Local/Temp/test-467378.s:99: Error: junk at end of line, first unrecognized character is `,'
C:/Users/Joe/AppData/Local/Temp/test-467378.s:107: Error: bad or irreducible absolute expression
C:/Users/Joe/AppData/Local/Temp/test-467378.s:107: Error: junk at end of line, first unrecognized character is `,'
C:/Users/Joe/AppData/Local/Temp/test-467378.s:123: Error: bad or irreducible absolute expression
C:/Users/Joe/AppData/Local/Temp/test-467378.s:123: Error: junk at end of line, first unrecognized character is `,'
C:/Users/Joe/AppData/Local/Temp/test-467378.s:128: Error: bad or irreducible absolute expression
C:/Users/Joe/AppData/Local/Temp/test-467378.s:128: Error: junk at end of line, first unrecognized character is `,'
C:/Users/Joe/AppData/Local/Temp/test-467378.s:133: Error: bad or irreducible absolute expression
C:/Users/Joe/AppData/Local/Temp/test-467378.s:133: Error: junk at end of line, first unrecognized character is `,'
C:/Users/Joe/AppData/Local/Temp/test-467378.s:137: Error: bad or irreducible absolute expression
C:/Users/Joe/AppData/Local/Temp/test-467378.s:137: Error: junk at end of line, first unrecognized character is `,'
C:/Users/Joe/AppData/Local/Temp/test-467378.s:146: Error: bad or irreducible absolute expression
C:/Users/Joe/AppData/Local/Temp/test-467378.s:146: Error: junk at end of line, first unrecognized character is `,'
clang: error: assembler (via gcc) command failed with exit code 1 (use -v to see invocation)
我不知道汇编语言。但似乎汇编应用程序无法理解这个 .s 文件。 所以我使用 -S 选项来保留 .s 文件。其中一个与 -fgnu-runtime 是 clang 。另一个是 clang 与 -fnext-runtime。
//test.s ,clang 带有 -fgnu-runtime 选项
.def __c_Foo__fooWithBar;
.scl 3;
.type 32;
.endef
.text
.align 16, 0x90
__c_Foo__fooWithBar:
pushl %ebp
movl %esp, %ebp
subl $16, %esp
movl 12(%ebp), %eax
movl 8(%ebp), %ecx
leal L_.str, %edx
movl %ecx, -4(%ebp)
movl %eax, -8(%ebp)
movl %edx, (%esp)
calll _printf
movl %eax, -12(%ebp)
addl $16, %esp
popl %ebp
ret
.def _main;
.scl 2;
.type 32;
.endef
.globl _main
.align 16, 0x90
_main:
pushl %ebp
movl %esp, %ebp
pushl %esi
subl $20, %esp
calll ___main
leal L_.class_name, %eax
movl $0, -8(%ebp)
movl %eax, (%esp)
calll _objc_lookup_class
leal _.objc_selector_list, %ecx
movl %eax, (%esp)
movl %ecx, 4(%esp)
movl %eax, -12(%ebp)
calll _objc_msg_lookup
movl $0, %ecx
leal _.objc_selector_list, %edx
movl -12(%ebp), %esi
movl %esi, (%esp)
movl %edx, 4(%esp)
movl %ecx, -16(%ebp)
calll *%eax
movl -16(%ebp), %eax
addl $20, %esp
popl %esi
popl %ebp
ret
.def _.objc_load_function;
.scl 3;
.type 32;
.endef
.align 16, 0x90
_.objc_load_function:
.cfi_startproc
pushl %ebp
Ltmp2:
.cfi_def_cfa_offset 8
Ltmp3:
.cfi_offset %ebp, -8
movl %esp, %ebp
Ltmp4:
.cfi_def_cfa_register %ebp
pushl %eax
leal ___unnamed_1, %eax
movl %eax, (%esp)
calll ___objc_exec_class
addl $4, %esp
popl %ebp
ret
.cfi_endproc
.data
L_.str:
.asciz "abc"
.globl ___objc_class_name_Foo
.align 4
___objc_class_name_Foo:
.long 0
L___unnamed_2:
.asciz "count"
L___unnamed_3:
.asciz "i"
.globl ___objc_ivar_offset_value_Foo.count
.align 4
___objc_ivar_offset_value_Foo.count:
.long 0
.align 4
_.ivar.offsets:
.long ___objc_ivar_offset_value_Foo.count
.lcomm _.objc_property_list,8,8
L___unnamed_4:
.asciz "v8@0:4"
L___unnamed_5:
.asciz "fooWithBar"
.align 16
_.objc_method_list:
.long 0
.long 1
.long L___unnamed_5
.long L___unnamed_4
.long __c_Foo__fooWithBar
.align 8
_.objc_ivar_list:
.long 1
.long L___unnamed_2
.long L___unnamed_3
.long 0
.globl ___objc_ivar_offset_Foo.count
.align 4
___objc_ivar_offset_Foo.count:
.long _.objc_ivar_list+12
L_.class_name:
.asciz "Foo"
.globl __OBJC_METACLASS_Foo
.align 16
__OBJC_METACLASS_Foo:
.long 0
.long 0
.long L_.class_name
.long 0
.long 18
.long 72
.long 0
.long _.objc_method_list
.long 0
.long 0
.long 0
.long 0
.long 0
.long 1
.long 0
.long 0
.long 0
.long 0
.lcomm _.objc_protocol_list,8,8
.globl __OBJC_CLASS_Foo
.align 16
__OBJC_CLASS_Foo:
.long __OBJC_METACLASS_Foo
.long 0
.long L_.class_name
.long 0
.long 17
.long 4
.long _.objc_ivar_list
.long 0
.long 0
.long 0
.long 0
.long _.objc_protocol_list
.long 0
.long 1
.long _.ivar.offsets
.long _.objc_property_list
.long 1
.long 1
.section .rdata$__objc_class_ref_Foo,"r"
.linkonce discard
.globl ___objc_class_ref_Foo
.align 4
___objc_class_ref_Foo:
.long ___objc_class_name_Foo
.data
L___unnamed_6:
.asciz "AnotherHack"
L___unnamed_7:
.asciz "__ObjC_Protocol_Holder_Ugly_Hack"
.lcomm _.objc_protocol_list1,8,8
.align 16
___unnamed_8:
.long L___unnamed_6
.long L___unnamed_7
.long 0
.long 0
.long _.objc_protocol_list1
.section .rdata$.objc_sel_namefooWithBar,"r"
.linkonce discard
.globl _.objc_sel_namefooWithBar
_.objc_sel_namefooWithBar:
.asciz "fooWithBar"
.data
.align 8
_.objc_selector_list:
.long _.objc_sel_namefooWithBar
.long L___unnamed_4
.zero 8
.align 16
___unnamed_9:
.long 1
.long _.objc_selector_list
.short 1
.short 1
.long __OBJC_CLASS_Foo
.long ___unnamed_8
.long 0
.long 0
L_.objc_source_file_name:
.asciz "./test.m"
.align 8
___unnamed_1:
.long 8
.long 16
.long L_.objc_source_file_name
.long ___unnamed_9
.section .ctors,"w"
.align 4
.long _.objc_load_function
//test.s ,clang 带有 -fnext-runtime 选项
.objc_class_name_Foo=0
.globl .objc_class_name_Foo
.lazy_reference .objc_class_name_Foo
.def _2B__5B_Foo_20_fooWithBar_5D_;
.scl 3;
.type 32;
.endef
.text
.align 16, 0x90
_2B__5B_Foo_20_fooWithBar_5D_:
pushl %ebp
movl %esp, %ebp
subl $16, %esp
movl 12(%ebp), %eax
movl 8(%ebp), %ecx
leal L_.str, %edx
movl %ecx, -4(%ebp)
movl %eax, -8(%ebp)
movl %edx, (%esp)
calll _printf
movl %eax, -12(%ebp)
addl $16, %esp
popl %ebp
ret
.def _main;
.scl 2;
.type 32;
.endef
.globl _main
.align 16, 0x90
_main:
pushl %ebp
movl %esp, %ebp
subl $16, %esp
calll ___main
movl $0, %eax
movl $0, -4(%ebp)
movl L_OBJC_CLASS_REFERENCES_, %ecx
movl L_OBJC_SELECTOR_REFERENCES_, %edx
movl %ecx, (%esp)
movl %edx, 4(%esp)
movl %eax, -8(%ebp)
calll _objc_msgSend
movl -8(%ebp), %eax
addl $16, %esp
popl %ebp
ret
.data
L_.str:
.asciz "abc"
.section __TEXT,__cstring,cstring_literals,"w"
L_OBJC_METH_VAR_NAME_:
.asciz "fooWithBar"
L_OBJC_METH_VAR_TYPE_:
.asciz "v8@0:4"
L_OBJC_CLASS_NAME_:
.asciz "Foo"
.section __OBJC,__cls_meth,regular,no_dead_strip,"w"
.align 4
L_OBJC_CLASS_METHODS_Foo:
.long 0
.long 1
.long L_OBJC_METH_VAR_NAME_
.long L_OBJC_METH_VAR_TYPE_
.long _2B__5B_Foo_20_fooWithBar_5D_
.section __OBJC,__meta_class,regular,no_dead_strip,"w"
.align 4
L_OBJC_METACLASS_Foo:
.long L_OBJC_CLASS_NAME_
.long 0
.long L_OBJC_CLASS_NAME_
.long 0
.long 2
.long 48
.long 0
.long L_OBJC_CLASS_METHODS_Foo
.long 0
.long 0
.long 0
.long 0
.section __TEXT,__cstring,cstring_literals,"w"
L_OBJC_METH_VAR_NAME_1:
.asciz "count"
L_OBJC_METH_VAR_TYPE_2:
.asciz "i"
.section __OBJC,__instance_vars,regular,no_dead_strip,"w"
.align 4
L_OBJC_INSTANCE_VARIABLES_Foo:
.long 1
.long L_OBJC_METH_VAR_NAME_1
.long L_OBJC_METH_VAR_TYPE_2
.long 0
.section __OBJC,__class,regular,no_dead_strip,"w"
.align 4
L_OBJC_CLASS_Foo:
.long L_OBJC_METACLASS_Foo
.long 0
.long L_OBJC_CLASS_NAME_
.long 0
.long 1
.long 4
.long L_OBJC_INSTANCE_VARIABLES_Foo
.long 0
.long 0
.long 0
.long 0
.long 0
.section __OBJC,__cls_refs,literal_pointers,no_dead_strip,"w"
.align 4
L_OBJC_CLASS_REFERENCES_:
.long L_OBJC_CLASS_NAME_
.section __OBJC,__message_refs,literal_pointers,no_dead_strip,"w"
.align 4
L_OBJC_SELECTOR_REFERENCES_:
.long L_OBJC_METH_VAR_NAME_
.section __TEXT,__cstring,cstring_literals,"w"
L_OBJC_CLASS_NAME_3:
.zero 1
.section __OBJC,__symbols,regular,no_dead_strip,"w"
.align 4
L_OBJC_SYMBOLS:
.long 0
.long 0
.short 1
.short 0
.long L_OBJC_CLASS_Foo
.section __OBJC,__module_info,regular,no_dead_strip,"w"
.align 4
L_OBJC_MODULES:
.long 7
.long 16
.long L_OBJC_CLASS_NAME_3
.long L_OBJC_SYMBOLS
我认为关键问题来自.s文件创建方式。
谁能帮我解决这个问题？ 尽管使用这些.dll 文件无法创建商业应用程序。
但是通过使用这些.dll，我们可以在window平台上构建一个很棒的cocoa学习环境。所有框架的windows版本都比gnustep更稳定、更实用。
谢谢。
最佳答案
首先，这违反了 iTunes EULA，因此无论是否出于商业目的，您都不应该这样做。
第二个问题是 clang/gcc 中的 -fnext-runtime 只能在 Darwin 上运行，它缺少 Windows 和其他操作系统的各种功能。我(受过教育)猜测并假设 -fgnu-runtime 对于链接苹果自己的框架是没有用的。
正如您所看到的 -fnext-runtime 正在发出 Darwin 特定的汇编程序命令，例如.lazy_reference，在 Windows 上，不是一个好的开始。
这就是 gcc 中 -fnext-runtime 的情况，现在 clang 已经有很长一段时间了，没有人在非 Darwin 系统的主线中维护 -fnext-runtime。
我的粗略理解是Apple实际上并没有直接在Windows上使用clang，他们将Objective-C重写为C并使用Visual Studio为Windows进行编译。
您可以开始对 clang 进行一些认真的黑客攻击，或者不打扰。
关于objective-c - 如何通过Apple libobjc.dll在mingw64-x86中使用clang编译objective-c源代码？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/12900596/