rebuilt with https://reviews.llvm.org/D94941 applied.

D94941.diff

@@ -0,0 +1,36 @@
+diff --git a/CMakeLists.txt b/CMakeLists.txt
+--- a/CMakeLists.txt
++++ b/CMakeLists.txt
+@@ -509,7 +509,7 @@
+     "${CLANG_VERSION_MAJOR}" CACHE STRING
+     "Major version number that will be appended to the clang executable name")
+ set(LIBCLANG_LIBRARY_VERSION
+-    "${CLANG_VERSION_MAJOR}" CACHE STRING
++    "${CLANG_VERSION_MAJOR}.${CLANG_VERSION_MINOR}" CACHE STRING
+     "Major version number that will be appended to the libclang library")
+ mark_as_advanced(CLANG_EXECUTABLE_VERSION LIBCLANG_LIBRARY_VERSION)
+ 
+diff --git a/tools/clang-shlib/CMakeLists.txt b/tools/clang-shlib/CMakeLists.txt
+--- a/tools/clang-shlib/CMakeLists.txt
++++ b/tools/clang-shlib/CMakeLists.txt
+@@ -48,3 +48,8 @@
+                   ${_OBJECTS}
+                   LINK_LIBS
+                   ${_DEPS})
++
++    set_target_properties(clang-cpp
++      PROPERTIES
++      VERSION ${LIBCLANG_LIBRARY_VERSION}
++      SOVERSION ${LIBCLANG_LIBRARY_VERSION})
+diff --git a/tools/libclang/CMakeLists.txt b/tools/libclang/CMakeLists.txt
+--- a/tools/libclang/CMakeLists.txt
++++ b/tools/libclang/CMakeLists.txt
+@@ -150,6 +150,7 @@
+   else()
+     set_target_properties(libclang
+       PROPERTIES
++      SOVERSION ${LIBCLANG_LIBRARY_VERSION}
+       VERSION ${LIBCLANG_LIBRARY_VERSION}
+       DEFINE_SYMBOL _CINDEX_LIB_)
+     # FIXME: _CINDEX_LIB_ affects dllexport/dllimport on Win32.
+

clang.spec

@@ -4,7 +4,7 @@
 %global min_ver 1
 %global patch_ver 0
 %global rc_ver 1
-%global baserelease 1
+%global baserelease 2
 
 %global clang_tools_binaries \
 	%{_bindir}/clang-apply-replacements \
@@ -89,6 +89,9 @@ Patch4:		0002-gtest-reorg.patch
 Patch11:	0001-ToolChain-Add-lgcc_s-to-the-linker-flags-when-using-.patch
 Patch13:	0001-Make-funwind-tables-the-default-for-all-archs.patch
 
+# Fix SONAME
+Patch5:     D94941.diff
+
 # Not Upstream
 Patch15:	0001-clang-Don-t-install-static-libraries.patch
 Patch16:	0001-clang-Fix-spurious-test-failure.patch
@@ -528,6 +531,9 @@ false
 
 %endif
 %changelog
+* Wed Jan 20 2021 Serge Guelton - 11.1.0-0.2.rc1
+- rebuilt with https://reviews.llvm.org/D94941 applied.
+
 * Thu Jan 14 2021 Serge Guelton - 11.1.0-0.1.rc1
 - 11.1.0-rc1 release