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

[NAKAMURA Takumi]

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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