3 digits versions in LLVM only started from 3.4.1 on. Hence, if you
have installed 3.4 or below, meson will fail even when we may not make
use of LLVM.

Cc: Dylan Baker <dy...@pnwbakers.com>
Cc: Eric Engestrom <eric.engest...@imgtec.com>
Signed-off-by: Andres Gomez <ago...@igalia.com>
---
 meson.build | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/meson.build b/meson.build
index 308f64cf811..b8c0b04893c 100644
--- a/meson.build
+++ b/meson.build
@@ -1037,7 +1037,18 @@ if with_llvm
   # that for our version checks.
   # svn suffixes are stripped by meson as of 0.43, and git suffixes are
   # strippped as of 0.44, but we support older meson versions.
-  _llvm_patch = _llvm_version[2]
+
+  # 3 digits versions in LLVM only started from 3.4.1 on
+  if dep_llvm.version() <= '3.3'
+    _llvm_patch = _llvm_version[1]
+  elif dep_llvm.version() >= '3.5'
+    _llvm_patch = _llvm_version[2]
+  elif dep_llvm.version().startswith('3.4.1') or 
dep_llvm.version().startswith('3.4.2')
+    _llvm_patch = _llvm_version[2]
+  else
+    _llvm_patch = _llvm_version[1]
+  endif
+
   if _llvm_patch.endswith('svn')
     _llvm_patch = _llvm_patch.split('s')[0]
   elif _llvm_patch.contains('git')
-- 
2.15.1

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