[llvm-dev] LLVM linking problem

[Reid Kleckner via llvm-dev]

That's pretty neat. Can you file a bug and attach a compressed version of
a.ll? It looks like link.exe has interesting ordering constraints around
associative COMDATs that we haven't run into before.

On Wed, Sep 16, 2015 at 9:15 AM, Russell Wallace via llvm-dev <
llvm-dev at lists.llvm.org> wrote:

> When I use clang on Windows to compile a program using regular expressions
> to intermediate code, then run the result through llvm-link and finally try
> to generate an executable, I get an error.
>
> All of these ingredients are necessary; it works if the program doesn't
> use regular expressions, and it works if I compile it directly instead of
> going via intermediate code.
>
> The use of the exact llvm-link binary, however, is not a necessary
> ingredient; I get the same result with a linking program of my own that
> uses the same libraries as llvm-link.
>
> Minimal test case:
>
> C:\test>type test.cpp
> #include <regex>
>
> int main() {
>   std::cmatch m;
>   regex_match("a", m, std::regex("a"));
>   return 0;
> }
>
> C:\test>clang-cl -Xclang -emit-llvm -c -fms-compatibility-version=19
> test.cpp
>
> C:\test>move test.obj test.ll
> Overwrite C:\test\test.ll? (Yes/No/All): y
>         1 file(s) moved.
>
> C:\test>llvm-link test.ll -o=a.ll
>
> C:\test>clang-cl -Wno-override-module a.ll
> a-e22d14.obj : fatal error LNK1243: invalid or corrupt file: COMDAT
> section 0x373 associated with following section 0x389
> clang-cl.exe: error: linker command failed with exit code 1243 (use -v to
> see invocation)
>
> C:\test>llvm-link -version
> LLVM (http://llvm.org/):
>   LLVM version 3.7.0
>   DEBUG build.
>   Default target: x86_64-pc-windows-msvc
>   Host CPU: sandybridge
>
>
> _______________________________________________
> LLVM Developers mailing list
> llvm-dev at lists.llvm.org
> http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20150916/8137e437/attachment.html>