[LLVMdev] LLVM2.8rc2 on MinGW 4.5.1 with --enable-shared

[NAKAMURA Takumi]

Good morning, Bill.

I saw my *trivial* patch has been applied in r115093 on branch_28, thank you.
The comment says "Disable MinGW & shared because it never worked."
but it oughta be a proper thing to activate cygming --enable-shared. ;)

May I apply it on ToT, too?

...Takumi


2010/9/30 NAKAMURA Takumi <geek4civic at gmail.com>:
> Good midnight, Kevin.
>
> cygming/shared might have been broken since r112976, IIRC. (ToT, too)
>
> A trivial patch;
>
> --- a/Makefile.rules
> +++ b/Makefile.rules
> @@ -942,6 +942,11 @@ ifdef EXPORTED_SYMBOL_FILE
>  # First, set up the native export file, which may differ from the source
>  # export file.
>
> +# The option --version-script is not effective on GNU ld win32.
> +ifneq (,$(filter $(HOST_OS),Cygwin MingW))
> +  HAVE_LINK_VERSION_SCRIPT := 0
> +endif
> +
>  ifeq ($(HOST_OS),Darwin)
>  # Darwin convention prefixes symbols with underscores.
>  NativeExportsFile := $(ObjDir)/$(notdir $(EXPORTED_SYMBOL_FILE)).sed
>
>
> ...Takumi
>
>
> 2010/9/30 Kevin Kelley <kevin at kelleysoft.com>:
>> Anybody having success building an LLVM.dll in this configuration?
>> It's failing for me, in tools/llvm-shlib, with an error suggesting
>> that the gcc ld doesn't understand the format of the exports map
>> being generated.
>>
>> (plain configure && make works just fine, it's just this shared
>> option that fails; google shows support for --enable-shared was
>> added around 2.7 timeframe and worked for both cygwin and mingw.
>> MinGW's been getting some activity this year, with regard to
>> shared libs, so I've been tracking current versions; not sure
>> whether this is a mingw regression or what's really going on.)
>>
>>
>> Anywyay, here's what that generated exports map looks like:
>>
>> $cat tools/llvm-shlib/Release/LLVM-2.8rc.exports.map
>> {
>>   global:
>>     ARMCompilationCallback;
>>     ARMCompilationCallbackC;
>>     AlphaCompilationCallback;
>>     LLVMABIAlignmentOfType;
>>     LLVMABISizeOfType;
>>     ...many many more symbols...
>>     x86DisassemblerThreeByte3AOpcodes DATA;
>>     x86DisassemblerTwoByteOpcodes DATA;
>>   local: *;
>> };
>>
>> and this is the error:
>>
>> llvm[0]: Linking Release Shared Library LLVM-2.8rc.dll
>> c:\MinGW\mingw-nuwen6.6\bin/ld.exe:C:/msys/llvm/rc2/tools/llvm-shlib/Release/LLVM-2.8rc.exports.map:
>> file format not recognized; treating as linker script
>> c:\MinGW\mingw-nuwen6.6\bin/ld.exe:C:/msys/llvm/rc2/tools/llvm-shlib/Release/LLVM-2.8rc.exports.map:1:
>> syntax error
>> collect2: ld returned 1 exit status
>> make: *** [/llvm/rc2/Release/bin/LLVM-2.8rc.dll] Error 1
>>
>>
>> So I'm thinking that there's some missing syntax in the map
>> file, but I don't know what ld expects.  Google didn't help
>> me there.  :-)
>>
>> This isn't worth a lot of time, since the static libs work just
>> fine, but getting shared to work would be nice.  If anybody's
>> done this, I'd appreciate hearing about it.
>>
>>
>> Kevin
>>
>>
>> LLVM checked out from release/2.8/rc2 and configured with:
>>   ../28rc2/configure --enable-optimized --enable-shared
>>
>> $ gcc --version
>> gcc.exe (GCC) 4.5.1
>> Copyright (C) 2010 Free Software Foundation, Inc. ...
>>
>> $ ld --version
>> GNU ld (GNU Binutils) 2.20.1.20100303
>> Copyright 2009 Free Software Foundation, Inc. ...
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>