add LLVM_VERSION_MAJOR and _MINOR defines

This is useful for clients that want to maintain compatibility
across multiple releases of LLVM. Currently users like Klee and
Mesa all have to roll their own 'parse llvm-config --version
output and generate defines' solution.

Also reuse the new macros so that version information is less
redundant/likely to fall out of sync again in the future.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@150405 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/Config/config.h.cmake

@@ -617,6 +617,12 @@
 /* Installation prefix directory */
 #cmakedefine LLVM_PREFIX "${LLVM_PREFIX}"
 
+/* Major version of the LLVM API */
+#cmakedefine LLVM_VERSION_MAJOR ${LLVM_VERSION_MAJOR}
+
+/* Minor version of the LLVM API */
+#cmakedefine LLVM_VERSION_MINOR ${LLVM_VERSION_MINOR}
+
 /* Define if the OS needs help to load dependent libraries for dlopen(). */
 #cmakedefine LTDL_DLOPEN_DEPLIBS ${LTDL_DLOPEN_DEPLIBS}
 

include/llvm/Config/config.h.in

@@ -615,6 +615,12 @@
 /* Installation prefix directory */
 #undef LLVM_PREFIX
 
+/* Major version of the LLVM API */
+#undef LLVM_VERSION_MAJOR
+
+/* Minor version of the LLVM API */
+#undef LLVM_VERSION_MINOR
+
 /* Define if the OS needs help to load dependent libraries for dlopen(). */
 #undef LTDL_DLOPEN_DEPLIBS
 

include/llvm/Config/llvm-config.h.cmake

@@ -106,4 +106,10 @@
 /* Installation prefix directory */
 #cmakedefine LLVM_PREFIX "${LLVM_PREFIX}"
 
+/* Major version of the LLVM API */
+#cmakedefine LLVM_VERSION_MAJOR ${LLVM_VERSION_MAJOR}
+
+/* Minor version of the LLVM API */
+#cmakedefine LLVM_VERSION_MINOR ${LLVM_VERSION_MINOR}
+
 #endif

include/llvm/Config/llvm-config.h.in

@@ -106,4 +106,10 @@
 /* Installation prefix directory */
 #undef LLVM_PREFIX
 
+/* Major version of the LLVM API */
+#undef LLVM_VERSION_MAJOR
+
+/* Minor version of the LLVM API */
+#undef LLVM_VERSION_MINOR
+
 #endif