[Mesa-dev] [PATCH] scons : Support LLVM 3.5 and 3.6 on windows.

[Olivier PENA]

Hi Jose,

It seems the minimum version is 3.3 (var required_llvm_version).
LLVM 3.3 already provided llvm-config.h.
So, that should be enough ?

I compiled and ran osmesa and libgl-gdi successfully with llvm 3.4.2, 3.5.0 and 3.6.0 (msvc 2013 32 bits) with this patch.

It seems there is some changes in the library returned by llvm-config --libs engine mcjit bitwriter x86asmprinter (as commented in llvm.py) with llvm 3.6
   removed : LLVMJIT 
   added : LLVMProfileData, LLVMX86Desc, LLVMMCDisassembler



-----Message d'origine-----
De : mesa-dev [mailto:mesa-dev-bounces at lists.freedesktop.org] De la part de Jose Fonseca
Envoyé : lundi 27 avril 2015 16:28
À : olivier.pena.80 at gmail.com; mesa-dev at lists.freedesktop.org
Objet : Re: [Mesa-dev] [PATCH] scons : Support LLVM 3.5 and 3.6 on windows.

On 27/04/15 11:23, olivier.pena.80 at gmail.com wrote:
> From: Olivier Pena <opena at isagri.fr>
>
> llvm/Config/llvm-config.h is parsed instead of llvm/Config/config.h for detecting LLVM version (http://lists.cs.uiuc.edu/pipermail/llvmdev/2014-June/073707.html)
> ---
>   scons/llvm.py | 33 ++++++++++++++++++++++++++-------
>   1 file changed, 26 insertions(+), 7 deletions(-)
>
> diff --git a/scons/llvm.py b/scons/llvm.py
> index be7df9f..6c6b733 100644
> --- a/scons/llvm.py
> +++ b/scons/llvm.py
> @@ -72,18 +72,25 @@ def generate(env):
>               return
>
>           # Try to determine the LLVM version from llvm/Config/config.h
> -        llvm_config = os.path.join(llvm_dir, 'include/llvm/Config/config.h')
> +        llvm_config = os.path.join(llvm_dir, 'include/llvm/Config/llvm-config.h')

>           if not os.path.exists(llvm_config):

We must keep supporting down to LLVM version 3.3, so the patch needs to 
be updated re-try with config.h (and the old regular expressions) when 
llvm-config.h does not exist.

>               print 'scons: could not find %s' % llvm_config
>               return
> -        llvm_version_re = re.compile(r'^#define PACKAGE_VERSION "([^"]*)"')
> +        llvm_version_major_re = re.compile(r'^#define LLVM_VERSION_MAJOR ([0-9]+)')
> +        llvm_version_minor_re = re.compile(r'^#define LLVM_VERSION_MINOR ([0-9]+)')
>           llvm_version = None
> +        llvm_version_major = None
> +        llvm_version_minor = None
>           for line in open(llvm_config, 'rt'):
> -            mo = llvm_version_re.match(line)
> +            mo = llvm_version_major_re.match(line)
>               if mo:
> -                llvm_version = mo.group(1)
> -                llvm_version = distutils.version.LooseVersion(llvm_version)
> -                break
> +                llvm_version_major = mo.group(1)
> +            mo = llvm_version_minor_re.match(line)
> +            if mo:
> +                llvm_version_minor = mo.group(1)
> +        if (llvm_version_major is not None) and (llvm_version_minor is not None):
> +            llvm_version = distutils.version.LooseVersion('{0}.{1}'.format(llvm_version_major, llvm_version_minor))
> +
>           if llvm_version is None:
>               print 'scons: could not determine the LLVM version from %s' % llvm_config
>               return
> @@ -99,7 +106,19 @@ def generate(env):
>           ])
>           env.Prepend(LIBPATH = [os.path.join(llvm_dir, 'lib')])
>           # LIBS should match the output of `llvm-config --libs engine mcjit bitwriter x86asmprinter`
> -        if llvm_version >= distutils.version.LooseVersion('3.5'):
> +        if llvm_version >= distutils.version.LooseVersion('3.6'):
> +            env.Prepend(LIBS = [
> +                'LLVMBitWriter', 'LLVMX86Disassembler', 'LLVMX86AsmParser',
> +                'LLVMX86CodeGen', 'LLVMSelectionDAG', 'LLVMAsmPrinter',
> +                'LLVMCodeGen', 'LLVMScalarOpts', 'LLVMProfileData',
> +                'LLVMInstCombine', 'LLVMTransformUtils', 'LLVMipa',
> +                'LLVMAnalysis', 'LLVMX86Desc', 'LLVMMCDisassembler',
> +                'LLVMX86Info', 'LLVMX86AsmPrinter', 'LLVMX86Utils',
> +                'LLVMMCJIT', 'LLVMTarget', 'LLVMExecutionEngine',
> +                'LLVMRuntimeDyld', 'LLVMObject', 'LLVMMCParser',
> +                'LLVMBitReader', 'LLVMMC', 'LLVMCore', 'LLVMSupport'

Is there any actual change in the LIBS content? Just for my info, what 
is it?

Jose

> +            ])
> +        elif llvm_version >= distutils.version.LooseVersion('3.5'):
>               env.Prepend(LIBS = [
>                   'LLVMBitWriter', 'LLVMMCJIT', 'LLVMRuntimeDyld',
>                   'LLVMX86Disassembler', 'LLVMX86AsmParser', 'LLVMX86CodeGen',
>

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