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
Please let me know if I can perform any additional testing and I very much appreciate your attention to this issue. We are trying to use a custom-written application on many platforms, particularly Windows.
-----Original Message-----
From: David Chisnall [mailto:theraven@sucs.org]
Sent: Tuesday, July 09, 2013 6:59 PM
To: White, Jerry P
Cc: address@hidden
Subject: Re: libobjc compile issue on mingw
Hi Jerry,
So far, my requests for someone with a Windows machine to test this code have been met with silence, so thank you for at least trying to build it...
The .type attribute is specific to ELF, and so is likely not required on Windows. Eric recently committed a change to trunk that disables it on Mac OS X, and I've now tweaked it so that it will (hopefully) build on Windows.
Note that Windows uses different calling conventions to... everything else, so objc_msgSend is broken. I think the block trampolines should work because I think that the first two argument registers are the same on Windows as elsewhere, but I'm not 100% sure about that without checking the documentation.
The runtime is probably missing dllexport declarations from objc_msgSend as well, so hopefully that isn't a problem.
Please try with trunk, and let me know what problems you encounter. Thank you again for testing.
David
On 9 Jul 2013, at 07:23, "White, Jerry P" <address@hidden> wrote:
I am using the mingw environment with clang installed. I downloaded libobjc2 by executing:
svn co http://svn.gna.org/svn/gnustep/libs/libobjc2/releases/1.7/
libobjc2 At this point I am getting stuck on block_trampolines.S. I have read everything I can find on the web and do not see a solution. If I understand properly, this file is used for assembly code, which is well beyond my skill set.
Any suggestions you have would be appreciated. Is there a way just to download libobjc2.dll.a directly?
Here are the steps I followed once I obtained the libobjc2 svn distribution.
1. I ran gnustep make (not cmake because I don't have it) by executing: make CC=clang CXX=clang++
2. I saw that I was missing mman.h under mingw, so I obtained a workaround by:
o svn co http://man-win32.googlecode.com/svn/trunk mman-win32-read-only
o cd mman-win32-read-only
o make && make install
3. I then went back to libobjc2 to continue working on compiling it
o cd ../libobjc2
o make CC=clang CXX=clang++
o compilation went ok until I encountered block_trampolines.S
§ block_trampolines.S:26: Warning: .type pseudo-op used outside of .def/.endef ignored.
§ block_trampolines.S:26: Error: junk at end of line. First unrecognized character is '_'
§ similar messages appear on lines 29 and 110
Jerry White
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