[llvm-dev] Help building llvm on freebsd 8.4

[Dimitry Andric via llvm-dev]

No, llvm 3.5 is the first version that requires C++11 to build.  This is still one of the major upgrade hurdles for FreeBSD, as versions before 10.x did not come with C++11 support.

Also, getting clang 3.4.x and a corresponding version of libc++ to build and install on FreeBSD 8 is not completely trivial.  On such older versions of FreeBSD, it is much easier to install a prepackaged version of a modern gcc, which comes with its own C++11 compatible version of libstdc++.

-Dimitry

> On 22 Jun 2016, at 23:42, Bruce Hoult <bruce at hoult.org> wrote:
> 
> Should be able to build llvm 3.5, as it implements c++11, but does not require it. And then use that to build current llvm.
> 
> 
> On Thu, Jun 23, 2016 at 12:01 AM, Dimitry Andric via llvm-dev <llvm-dev at lists.llvm.org> wrote:
> You cannot build any llvm or clang releases after 3.4 on FreeBSD 8.x natively, as it is not C++11 capable.  You need to use at least FreeBSD 10.x, which comes with clang 3.4.1 and libc++, providing C++11 support.
> 
> Also, please note that FreeBSD 8.x is officially EOLed as of August 1, 2015.
> 
> That said, you might have some success if you install a recent gcc port.  You will most likely have to manually apply https://svnweb.freebsd.org/base?view=revision&revision=297212 though, as I have not merged that back to FreeBSD 8.
> 
> -Dimitry
> 
> On 22 Jun 2016, at 22:05, Sushil pangeni via llvm-dev <llvm-dev at lists.llvm.org> wrote:
> >
> > I am trying to build LLVM from source in FreeBSD 8.4. Here are the steps i carried out
> >
> > 1. Downloaded the source from http://llvm.org/releases/3.8.0/llvm-3.8.0.src.tar.xz
> > 2. Extracted the source into a folder.
> > 3. Created a build directory and inside it ran $ cmake ../llvm-3.8.0.src
> > 4. Started the build using $cmake --build .
> >
> > It throws the following error
> >
> > /home/spangeni/llvm/llvm-3.8.0.src/lib/TableGen/TGLexer.cpp: In member function 'llvm::tgtok::TokKind llvm::TGLexer::LexNumber()':
> > /home/spangeni/llvm/llvm-3.8.0.src/lib/TableGen/TGLexer.cpp:393:48: error: 'strtoll' was not declared in this scope
> >        CurIntVal = strtoll(NumStart, nullptr, 16);
> >                                                 ^
> > /home/spangeni/llvm/llvm-3.8.0.src/lib/TableGen/TGLexer.cpp:398:60: error: 'strtoull' was not declared in this scope
> >          CurIntVal = (int64_t)strtoull(NumStart, nullptr, 16);
> >                                                             ^
> > /home/spangeni/llvm/llvm-3.8.0.src/lib/TableGen/TGLexer.cpp:414:47: error: 'strtoll' was not declared in this scope
> >        CurIntVal = strtoll(NumStart, nullptr, 2);
> >                                                ^
> > /home/spangeni/llvm/llvm-3.8.0.src/lib/TableGen/TGLexer.cpp:429:44: error: 'strtoll' was not declared in this scope
> >    CurIntVal = strtoll(TokStart, nullptr, 10);
> > GCC Version = 4.9.2 CMAKE version = 3.2.3
> >
> > I also tried to include stdlib.h in the file llvm-3.8.0.src/lib/TableGen/TGLexer.cpp. This din't help.
> >
> > Is there any configuration I am missing ?
> 
> 
> 
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