Re: ***JUNK MAIL*** FW: libobjc compile issue on mingw

[Adam Fedor]

I finally had some time to work on this and have got (perhaps) a little farther 
(I compiled with clang, although I get similar errors with gcc).  I still these 
errors:

h:/Source/nsis/sources/gstep-current/svn-libobjc2/block_trampolines.S:113: 
Error: junk at end of line, first unrecognized character is `-'

Which I can solve by deleting these lines in block_trampolines.S and 
objc_msgSend.S:

Index: block_trampolines.S
===================================================================
--- block_trampolines.S (revision 36982)
+++ block_trampolines.S (working copy)
@@ -110,5 +110,4 @@
 CDECL(__objc_block_trampoline_end_sret):
 #endif
 #if HAS_SECTION_DIRECTIVE
-.section .note.GNU-stack,"",%progbits
 #endif

Which didn't seem to cause any side effects, but then I ran into the errors 
Jerry had below. Based on some googling, I tried to fix the this error by 
removing "-fPIC" and defining "-DDLL_EXPORT", but that didn't seem to help. 
Finally I just removed this line (sorry, I don't know any assembly):

Index: objc_msgSend.x86-32.S
===================================================================
--- objc_msgSend.x86-32.S       (revision 36982)
+++ objc_msgSend.x86-32.S       (working copy)
@@ -80,7 +80,6 @@
 7:
        popl  %ebx;
 8:
-       addl  $_GLOBAL_OFFSET_TABLE_+(8b-7b), %ebx
        leal  address@hidden(%ebx), %eax
        mov   (%eax), %eax
        popl  %ebx

and the file compiled, but I got an error message later when linking (which 
appears related):

CMakeFiles/objc.dir/objc_msgSend.S.obj:fake:(.text+0x72): undefined reference 
to address@hidden'
CMakeFiles/objc.dir/objc_msgSend.S.obj:fake:(.text+0x84): undefined reference 
to address@hidden'
CMakeFiles/objc.dir/objc_msgSend.S.obj:fake:(.text+0x101): undefined reference 
to address@hidden'
CMakeFiles/objc.dir/objc_msgSend.S.obj:fake:(.text+0x113): undefined reference 
to address@hidden'
CMakeFiles/objc.dir/objc_msgSend.S.obj:fake:(.text+0x190): undefined reference 
to address@hidden'
CMakeFiles/objc.dir/objc_msgSend.S.obj:fake:(.text+0x1a2): undefined reference 
to address@hidden'

I'm still trying to find something that works for that.  Also, FYI asprintf and 
mkstemp are not defined on MingW, but it's trivial to add a definition for 
those (patch attached, although probably in the wrong place).

Adam

mingw.patch
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On Jul 10, 2013, at 7:48 AM, Jerry White <address@hidden> wrote:

> David, this is Jerry White again. I am writing you from my personal email 
> because I am having to do this testing away from the office.
> 
> I deleted my previous download of libobjc2 and obtained the trunk, as you 
> suggested. The compilation appears to get a little further now in that we get 
> past block_trampolines.S. Now we appear to get stuck on objc_msgSend.S (as 
> you guessed would happen). I am including the pertinent output below.
> 
> Assembling block_trampolines.S...
> Assembling objc_msgSend.S...
> c:/gnustep/bin/../lib/gcc/mingw32/4.6.1/../../../../mingw32/bin/as.exe: BFD 
> (GNU Binutils) 2.21.53.2
> 0110804 assertion fail ../../binutils-2.21.53/bfd/coff-i386.c:584
> ./objc_msgSend.x86-32.S: Assembler messages:
> ./objc_msgSend.x86-32.S:98: Error: cannot represent relocation type 
> BFD_RELOC_386_GOTPC
> c:/gnustep/bin/../lib/gcc/mingw32/4.6.1/../../../../mingw32/bin/as.exe: BFD 
> (GNU Binutils) 2.21.53.2
> 0110804 assertion fail ../../binutils-2.21.53/bfd/coff-i386.c:584
> ./objc_msgSend.x86-32.S:102: Error: cannot represent relocation type 
> BFD_RELOC_386_GOTPC
> c:/gnustep/bin/../lib/gcc/mingw32/4.6.1/../../../../mingw32/bin/as.exe: BFD 
> (GNU Binutils) 2.21.53.2
> 0110804 assertion fail ../../binutils-2.21.53/bfd/coff-i386.c:584
> ./objc_msgSend.x86-32.S:106: Error: cannot represent relocation type 
> BFD_RELOC_386_GOTPC
> clang.exe: error: assembler (via gcc) command failed with exit code 1 (use -v 
> to see invocation)
> make: *** [objc_msgSend.o] Error 1

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