From c0ef9a67d3c0177f49efd1687f6c257bf09e0612 Mon Sep 17 00:00:00 2001
From: =?utf8?q?Jos=C3=A9=20Fonseca?= <jfonseca@vmware.com>
Date: Thu, 8 May 2014 13:32:07 +0100
Subject: [PATCH] scons: Require LLVM 3.1

Support for prior versions will be removed in the following change.

Reviewed-by: Roland Scheidegger <sroland@vmware.com>
---
 scons/llvm.py | 57 ++++++++++++---------------------------------------
 1 file changed, 13 insertions(+), 44 deletions(-)

diff --git a/scons/llvm.py b/scons/llvm.py
index 134a0728ef1..cdfbe43708f 100644
--- a/scons/llvm.py
+++ b/scons/llvm.py
@@ -37,6 +37,9 @@ import SCons.Errors
 import SCons.Util
 
 
+required_llvm_version = '3.1'
+
+
 def generate(env):
     env['llvm'] = False
 
@@ -84,6 +87,9 @@ def generate(env):
         if llvm_version is None:
             print 'scons: could not determine the LLVM version from %s' % llvm_config
             return
+        if llvm_version < distutils.version.LooseVersion(required_llvm_version):
+            print 'scons: LLVM version %s found, but %s is required' % (llvm_version, required_llvm_version)
+            return
 
         env.Prepend(CPPPATH = [os.path.join(llvm_dir, 'include')])
         env.AppendUnique(CPPDEFINES = [
@@ -104,8 +110,8 @@ def generate(env):
                 'LLVMAnalysis', 'LLVMTarget', 'LLVMMC', 'LLVMCore',
                 'LLVMSupport', 'LLVMRuntimeDyld', 'LLVMObject'
             ])
-        elif llvm_version >= distutils.version.LooseVersion('3.0'):
-            # 3.0
+        else:
+            # 3.1
             env.Prepend(LIBS = [
                 'LLVMBitWriter', 'LLVMX86Disassembler', 'LLVMX86AsmParser',
                 'LLVMX86CodeGen', 'LLVMX86Desc', 'LLVMSelectionDAG',
@@ -116,46 +122,6 @@ def generate(env):
                 'LLVMAnalysis', 'LLVMTarget', 'LLVMMC', 'LLVMCore',
                 'LLVMSupport'
             ])
-        elif llvm_version >= distutils.version.LooseVersion('2.9'):
-            # 2.9
-            env.Prepend(LIBS = [
-                'LLVMObject', 'LLVMMCJIT', 'LLVMMCDisassembler',
-                'LLVMLinker', 'LLVMipo', 'LLVMInterpreter',
-                'LLVMInstrumentation', 'LLVMJIT', 'LLVMExecutionEngine',
-                'LLVMBitWriter', 'LLVMX86Disassembler', 'LLVMX86AsmParser',
-                'LLVMMCParser', 'LLVMX86AsmPrinter', 'LLVMX86CodeGen',
-                'LLVMSelectionDAG', 'LLVMX86Utils', 'LLVMX86Info', 'LLVMAsmPrinter',
-                'LLVMCodeGen', 'LLVMScalarOpts', 'LLVMInstCombine',
-                'LLVMTransformUtils', 'LLVMipa', 'LLVMAsmParser',
-                'LLVMArchive', 'LLVMBitReader', 'LLVMAnalysis', 'LLVMTarget',
-                'LLVMCore', 'LLVMMC', 'LLVMSupport',
-            ])
-        elif llvm_version >= distutils.version.LooseVersion('2.7'):
-            # 2.7
-            env.Prepend(LIBS = [
-                'LLVMLinker', 'LLVMipo', 'LLVMInterpreter',
-                'LLVMInstrumentation', 'LLVMJIT', 'LLVMExecutionEngine',
-                'LLVMBitWriter', 'LLVMX86Disassembler', 'LLVMX86AsmParser',
-                'LLVMMCParser', 'LLVMX86AsmPrinter', 'LLVMX86CodeGen',
-                'LLVMSelectionDAG', 'LLVMX86Info', 'LLVMAsmPrinter',
-                'LLVMCodeGen', 'LLVMScalarOpts', 'LLVMInstCombine',
-                'LLVMTransformUtils', 'LLVMipa', 'LLVMAsmParser',
-                'LLVMArchive', 'LLVMBitReader', 'LLVMAnalysis', 'LLVMTarget',
-                'LLVMMC', 'LLVMCore', 'LLVMSupport', 'LLVMSystem',
-            ])
-        else:
-            # 2.6
-            env.Prepend(LIBS = [
-                'LLVMX86AsmParser', 'LLVMX86AsmPrinter', 'LLVMX86CodeGen',
-                'LLVMX86Info', 'LLVMLinker', 'LLVMipo', 'LLVMInterpreter',
-                'LLVMInstrumentation', 'LLVMJIT', 'LLVMExecutionEngine',
-                'LLVMDebugger', 'LLVMBitWriter', 'LLVMAsmParser',
-                'LLVMArchive', 'LLVMBitReader', 'LLVMSelectionDAG',
-                'LLVMAsmPrinter', 'LLVMCodeGen', 'LLVMScalarOpts',
-                'LLVMTransformUtils', 'LLVMipa', 'LLVMAnalysis',
-                'LLVMTarget', 'LLVMMC', 'LLVMCore', 'LLVMSupport',
-                'LLVMSystem',
-            ])
         env.Append(LIBS = [
             'imagehlp',
             'psapi',
@@ -180,6 +146,10 @@ def generate(env):
         llvm_version = env.backtick('llvm-config --version').rstrip()
         llvm_version = distutils.version.LooseVersion(llvm_version)
 
+        if llvm_version < distutils.version.LooseVersion(required_llvm_version):
+            print 'scons: LLVM version %s found, but %s is required' % (llvm_version, required_llvm_version)
+            return
+
         try:
             # Treat --cppflags specially to prevent NDEBUG from disabling
             # assertion failures in debug builds.
@@ -197,8 +167,7 @@ def generate(env):
 
             components = ['engine', 'bitwriter', 'x86asmprinter']
 
-            if llvm_version >= distutils.version.LooseVersion('3.1'):
-                components.append('mcjit')
+            components.append('mcjit')
 
             env.ParseConfig('llvm-config --libs ' + ' '.join(components))
             env.ParseConfig('llvm-config --ldflags')
-- 
2.30.2