New upstream release Should be mostly minor fixes Was driven by https://bugs.llvm.org/show_bug.cgi?id=46526 but as we are not impacted, I reverted the change in debian/patches/revert-abi-change-clang.diff

debian/changelog

@@ -1,3 +1,13 @@
+llvm-toolchain-11 (1:11.1.0-1) unstable; urgency=medium
+
+  * New upstream release
+    Should be mostly minor fixes
+    Was driven by https://bugs.llvm.org/show_bug.cgi?id=46526
+    but as we are not impacted, I reverted the change in
+    debian/patches/revert-abi-change-clang.diff
+
+ -- Sylvestre Ledru <sylvestre@debian.org>  Wed, 17 Feb 2021 08:59:36 +0100
+
 llvm-toolchain-11 (1:11.0.1-2) unstable; urgency=medium
 
   * Fix the changelog

debian/patches/revert-abi-change-clang.diff

@@ -0,0 +1,187 @@
+commit 9bbcb554cdbf1a7b85e9a72169e4037cf4736a10
+Author: Marco Antognini <marco.antognini@arm.com>
+Date:   Thu Oct 29 10:30:11 2020 +0000
+
+    Address ABI issues introduced with CXCursor_CXXAddrspaceCastExpr
+    
+    Revert values in CXCursorKind as they were before
+    CXCursor_CXXAddrspaceCastExpr was introduced in a6a237f2046a ([OpenCL]
+    Added addrspace_cast operator in C++ mode., 2020-05-18).
+    
+    Insert CXCursor_CXXAddrspaceCastExpr after the last expression in
+    CXCursorKind using the next available value.
+    
+    Reviewed By: akyrtzi, svenvh
+    
+    Differential Revision: https://reviews.llvm.org/D90385
+    
+    (cherry picked from commit bbdbd020d2c2f315ed1545b23c23ec6ff1abc022)
+
+Index: llvm-toolchain-11_11.1.0/clang/include/clang-c/Index.h
+===================================================================
+--- llvm-toolchain-11_11.1.0.orig/clang/include/clang-c/Index.h
++++ llvm-toolchain-11_11.1.0/clang/include/clang-c/Index.h
+@@ -33,7 +33,7 @@
+  * compatible, thus CINDEX_VERSION_MAJOR is expected to remain stable.
+  */
+ #define CINDEX_VERSION_MAJOR 0
+-#define CINDEX_VERSION_MINOR 61
++#define CINDEX_VERSION_MINOR 60
+ 
+ #define CINDEX_VERSION_ENCODE(major, minor) (((major)*10000) + ((minor)*1))
+ 
+@@ -2052,58 +2052,62 @@ enum CXCursorKind {
+    */
+   CXCursor_CXXFunctionalCastExpr = 128,
+ 
++  /** OpenCL's addrspace_cast<> expression.
++   */
++  CXCursor_CXXAddrspaceCastExpr = 129,
++
+   /** A C++ typeid expression (C++ [expr.typeid]).
+    */
+-  CXCursor_CXXTypeidExpr = 129,
++  CXCursor_CXXTypeidExpr = 130,
+ 
+   /** [C++ 2.13.5] C++ Boolean Literal.
+    */
+-  CXCursor_CXXBoolLiteralExpr = 130,
++  CXCursor_CXXBoolLiteralExpr = 131,
+ 
+   /** [C++0x 2.14.7] C++ Pointer Literal.
+    */
+-  CXCursor_CXXNullPtrLiteralExpr = 131,
++  CXCursor_CXXNullPtrLiteralExpr = 132,
+ 
+   /** Represents the "this" expression in C++
+    */
+-  CXCursor_CXXThisExpr = 132,
++  CXCursor_CXXThisExpr = 133,
+ 
+   /** [C++ 15] C++ Throw Expression.
+    *
+    * This handles 'throw' and 'throw' assignment-expression. When
+    * assignment-expression isn't present, Op will be null.
+    */
+-  CXCursor_CXXThrowExpr = 133,
++  CXCursor_CXXThrowExpr = 134,
+ 
+   /** A new expression for memory allocation and constructor calls, e.g:
+    * "new CXXNewExpr(foo)".
+    */
+-  CXCursor_CXXNewExpr = 134,
++  CXCursor_CXXNewExpr = 135,
+ 
+   /** A delete expression for memory deallocation and destructor calls,
+    * e.g. "delete[] pArray".
+    */
+-  CXCursor_CXXDeleteExpr = 135,
++  CXCursor_CXXDeleteExpr = 136,
+ 
+   /** A unary expression. (noexcept, sizeof, or other traits)
+    */
+-  CXCursor_UnaryExpr = 136,
++  CXCursor_UnaryExpr = 137,
+ 
+   /** An Objective-C string literal i.e. @"foo".
+    */
+-  CXCursor_ObjCStringLiteral = 137,
++  CXCursor_ObjCStringLiteral = 138,
+ 
+   /** An Objective-C \@encode expression.
+    */
+-  CXCursor_ObjCEncodeExpr = 138,
++  CXCursor_ObjCEncodeExpr = 139,
+ 
+   /** An Objective-C \@selector expression.
+    */
+-  CXCursor_ObjCSelectorExpr = 139,
++  CXCursor_ObjCSelectorExpr = 140,
+ 
+   /** An Objective-C \@protocol expression.
+    */
+-  CXCursor_ObjCProtocolExpr = 140,
++  CXCursor_ObjCProtocolExpr = 141,
+ 
+   /** An Objective-C "bridged" cast expression, which casts between
+    * Objective-C pointers and C pointers, transferring ownership in the process.
+@@ -2112,7 +2116,7 @@ enum CXCursorKind {
+    *   NSString *str = (__bridge_transfer NSString *)CFCreateString();
+    * \endcode
+    */
+-  CXCursor_ObjCBridgedCastExpr = 141,
++  CXCursor_ObjCBridgedCastExpr = 142,
+ 
+   /** Represents a C++0x pack expansion that produces a sequence of
+    * expressions.
+@@ -2127,7 +2131,7 @@ enum CXCursorKind {
+    * }
+    * \endcode
+    */
+-  CXCursor_PackExpansionExpr = 142,
++  CXCursor_PackExpansionExpr = 143,
+ 
+   /** Represents an expression that computes the length of a parameter
+    * pack.
+@@ -2139,7 +2143,7 @@ enum CXCursorKind {
+    * };
+    * \endcode
+    */
+-  CXCursor_SizeOfPackExpr = 143,
++  CXCursor_SizeOfPackExpr = 144,
+ 
+   /* Represents a C++ lambda expression that produces a local function
+    * object.
+@@ -2153,43 +2157,39 @@ enum CXCursorKind {
+    * }
+    * \endcode
+    */
+-  CXCursor_LambdaExpr = 144,
++  CXCursor_LambdaExpr = 145,
+ 
+   /** Objective-c Boolean Literal.
+    */
+-  CXCursor_ObjCBoolLiteralExpr = 145,
++  CXCursor_ObjCBoolLiteralExpr = 146,
+ 
+   /** Represents the "self" expression in an Objective-C method.
+    */
+-  CXCursor_ObjCSelfExpr = 146,
++  CXCursor_ObjCSelfExpr = 147,
+ 
+   /** OpenMP 5.0 [2.1.5, Array Section].
+    */
+-  CXCursor_OMPArraySectionExpr = 147,
++  CXCursor_OMPArraySectionExpr = 148,
+ 
+   /** Represents an @available(...) check.
+    */
+-  CXCursor_ObjCAvailabilityCheckExpr = 148,
++  CXCursor_ObjCAvailabilityCheckExpr = 149,
+ 
+   /**
+    * Fixed point literal
+    */
+-  CXCursor_FixedPointLiteral = 149,
++  CXCursor_FixedPointLiteral = 150,
+ 
+   /** OpenMP 5.0 [2.1.4, Array Shaping].
+    */
+-  CXCursor_OMPArrayShapingExpr = 150,
++  CXCursor_OMPArrayShapingExpr = 151,
+ 
+   /**
+    * OpenMP 5.0 [2.1.6 Iterators]
+    */
+-  CXCursor_OMPIteratorExpr = 151,
+-
+-  /** OpenCL's addrspace_cast<> expression.
+-   */
+-  CXCursor_CXXAddrspaceCastExpr = 152,
++  CXCursor_OMPIteratorExpr = 152,
+ 
+-  CXCursor_LastExpr = CXCursor_CXXAddrspaceCastExpr,
++  CXCursor_LastExpr = CXCursor_OMPIteratorExpr,
+ 
+   /* Statements */
+   CXCursor_FirstStmt = 200,

debian/patches/series

@@ -141,3 +141,4 @@ print-lldb-path.patch
 libcxx-armhf-ftbfs.diff
 silent-integration-test-suite-i386.diff
 0001-Add-minor-version-to-libclang.so-and-libclang-cpp.so.patch
+revert-abi-change-clang.diff