Rename llvm library from libLLVM-X.Y to libLLVM-X

[sylvestre.ledru]

Summary

As we are only doing X.0.Z releases (not using the minor version), there is no need to keep -X.Y in the version.

Like patch https://reviews.llvm.org/D41808, I propose that we rename libLLVM-7.0svn.so to libLLVM-7svn.so
This patch will also rename downstream libraries like liblldb-7.0 to liblldb-7

[sylvestre.ledru]

More things to update (the library name too)

[sylvestre.ledru]

With llvm-config

[hans]

Seems reasonable to me. Probably worth adding a blurb in ReleaseNotes.rst too.

[dim]

LGTM

[sylvestre.ledru]

Add to the release notes

llvm-toolchain-snapshot_7~svn323616/cmake/modules/AddLLVM.cmake

     # FIXME: Don't write the "local:" line on OpenBSD.
     # in the export file, also add a linker script to version LLVM symbols (form: LLVM_N.M)
     add_custom_command(OUTPUT ${native_export_file}
-      COMMAND echo "LLVM_${LLVM_VERSION_MAJOR}.${LLVM_VERSION_MINOR} {" > ${native_export_file}
+      COMMAND echo "LLVM_${LLVM_VERSION_MAJOR} {" > ${native_export_file}
       COMMAND grep -q "[[:alnum:]]" ${export_file} && echo "  global:" >> ${native_export_file} || :
       COMMAND sed -e "s/$/;/" -e "s/^/    /" < ${export_file} >> ${native_export_file}
       COMMAND echo "  local: *;" >> ${native_export_file}

         PROPERTIES
         # Since 4.0.0, the ABI version is indicated by the major version
         SOVERSION ${LLVM_VERSION_MAJOR}
-        VERSION ${LLVM_VERSION_MAJOR}.${LLVM_VERSION_MINOR}.${LLVM_VERSION_PATCH}${LLVM_VERSION_SUFFIX})
+        VERSION ${LLVM_VERSION_MAJOR}${LLVM_VERSION_SUFFIX})
     endif()
   endif()
 

       if(${output_name} STREQUAL "output_name-NOTFOUND")
         set(output_name ${name})
       endif()
-      set(library_name ${output_name}-${LLVM_VERSION_MAJOR}.${LLVM_VERSION_MINOR}${LLVM_VERSION_SUFFIX})
+      set(library_name ${output_name}-${LLVM_VERSION_MAJOR}${LLVM_VERSION_SUFFIX})
       set(api_name ${output_name}-${LLVM_VERSION_MAJOR}.${LLVM_VERSION_MINOR}.${LLVM_VERSION_PATCH}${LLVM_VERSION_SUFFIX})
       set_target_properties(${name} PROPERTIES OUTPUT_NAME ${library_name})
       llvm_install_library_symlink(${api_name} ${library_name} SHARED

llvm-toolchain-snapshot_7~svn323616/tools/llvm-config/CMakeLists.txt

 set(LLVM_CXXFLAGS "${CMAKE_CXX_FLAGS} ${CMAKE_CXX_FLAGS_${uppercase_CMAKE_BUILD_TYPE}} ${COMPILE_FLAGS} ${LLVM_DEFINITIONS}")
 set(LLVM_BUILD_SYSTEM cmake)
 set(LLVM_HAS_RTTI ${LLVM_CONFIG_HAS_RTTI})
-set(LLVM_DYLIB_VERSION "${LLVM_VERSION_MAJOR}.${LLVM_VERSION_MINOR}${LLVM_VERSION_SUFFIX}")
+set(LLVM_DYLIB_VERSION "${LLVM_VERSION_MAJOR}${LLVM_VERSION_SUFFIX}")
 set(LLVM_HAS_GLOBAL_ISEL "ON")
 
 # Use the C++ link flags, since they should be a superset of C link flags.

llvm-toolchain-snapshot_7~svn323616/tools/llvm-shlib/simple_version_script.map.in

-LLVM_@LLVM_VERSION_MAJOR@.@LLVM_VERSION_MINOR@ { global: *; };
+LLVM_@LLVM_VERSION_MAJOR@ { global: *; };