Add version to all LLVM cmake package

Add a version to non-LLVM cmake package so that users needing an exact
version match can use the version parameter to find_package. Also adjust
the find_package(LLVM) to use an exact version match as well.

Reviewed By: arsenm, stellaraccident, mceier

Differential Revision: https://reviews.llvm.org/D138274

3 files changed, 24 insertions, 1 deletions

diff --git a/polly/cmake/CMakeLists.txt b/polly/cmake/CMakeLists.txt
index 1834107..d7b3fa1 100644
--- a/polly/cmake/CMakeLists.txt
+++ b/polly/cmake/CMakeLists.txt
@@ -82,6 +82,10 @@ configure_file(
   ${CMAKE_CURRENT_SOURCE_DIR}/PollyConfig.cmake.in
   ${polly_cmake_builddir}/PollyConfig.cmake
   @ONLY)
+configure_file(
+  ${CMAKE_CURRENT_SOURCE_DIR}/PollyConfigVersion.cmake.in
+  ${polly_cmake_builddir}/PollyConfigVersion.cmake
+  @ONLY)
 
 file(GENERATE
   OUTPUT ${polly_cmake_builddir}/${POLLY_EXPORTS_FILE_NAME}
@@ -138,6 +142,10 @@ configure_file(
   ${CMAKE_CURRENT_SOURCE_DIR}/PollyConfig.cmake.in
   ${CMAKE_CURRENT_BINARY_DIR}/CMakeFiles/PollyConfig.cmake
   @ONLY)
+configure_file(
+  ${CMAKE_CURRENT_SOURCE_DIR}/PollyConfigVersion.cmake.in
+  ${CMAKE_CURRENT_BINARY_DIR}/CMakeFiles/PollyConfigVersion.cmake
+  @ONLY)
 file(GENERATE OUTPUT
   ${CMAKE_CURRENT_BINARY_DIR}/CMakeFiles/${POLLY_EXPORTS_FILE_NAME}
   CONTENT "${POLLY_EXPORTS}")
@@ -146,6 +154,7 @@ if (NOT LLVM_INSTALL_TOOLCHAIN_ONLY)
   install(
     FILES
     "${CMAKE_CURRENT_BINARY_DIR}/CMakeFiles/PollyConfig.cmake"
+    "${CMAKE_CURRENT_BINARY_DIR}/CMakeFiles/PollyConfigVersion.cmake"
     "${CMAKE_CURRENT_BINARY_DIR}/CMakeFiles/${POLLY_EXPORTS_FILE_NAME}"
     DESTINATION "${POLLY_INSTALL_PACKAGE_DIR}")
 endif ()
diff --git a/polly/cmake/PollyConfig.cmake.in b/polly/cmake/PollyConfig.cmake.in
index ce1144d..4513ec4 100644
--- a/polly/cmake/PollyConfig.cmake.in
+++ b/polly/cmake/PollyConfig.cmake.in
@@ -2,7 +2,8 @@
 
 @POLLY_CONFIG_CODE@
 
-find_package(LLVM REQUIRED CONFIG
+set(LLVM_VERSION @LLVM_VERSION_MAJOR@.@LLVM_VERSION_MINOR@.@LLVM_VERSION_PATCH@)
+find_package(LLVM ${LLVM_VERSION} EXACT REQUIRED CONFIG
              HINTS "@POLLY_CONFIG_LLVM_CMAKE_DIR@")
 
 set(Polly_CMAKE_DIR ${CMAKE_CURRENT_LIST_DIR})
diff --git a/polly/cmake/PollyConfigVersion.cmake.in b/polly/cmake/PollyConfigVersion.cmake.in
new file mode 100644
index 0000000..e9ac4ed
--- /dev/null
+++ b/polly/cmake/PollyConfigVersion.cmake.in
@@ -0,0 +1,13 @@
+set(PACKAGE_VERSION "@PACKAGE_VERSION@")
+
+# LLVM is API-compatible only with matching major.minor versions
+# and patch versions not less than that requested.
+if("@LLVM_VERSION_MAJOR@.@LLVM_VERSION_MINOR@" VERSION_EQUAL
+    "${PACKAGE_FIND_VERSION_MAJOR}.${PACKAGE_FIND_VERSION_MINOR}"
+   AND NOT "@LLVM_VERSION_PATCH@" VERSION_LESS "${PACKAGE_FIND_VERSION_PATCH}")
+  set(PACKAGE_VERSION_COMPATIBLE 1)
+  if("@LLVM_VERSION_PATCH@" VERSION_EQUAL
+      "${PACKAGE_FIND_VERSION_PATCH}")
+    set(PACKAGE_VERSION_EXACT 1)
+  endif()
+endif()