fix: define GGML_VERSION variables for proper SOVERSION expansion (#13469)

The ggml/src/CMakeLists.txt uses GGML_VERSION_MAJOR for the shared
library SOVERSION property, but these variables were not defined when
building from ollama's CMakeLists.txt.

This caused libggml-base.so to be named with a literal "SOVERSION"
suffix (libggml-base.so.SOVERSION) instead of the actual version
number (libggml-base.so.0).

The fix adds the required GGML_VERSION_* variables before including
the ggml subdirectory.

Fixes #13436

CMakeLists.txt

@@ -54,6 +54,13 @@ include_directories(${CMAKE_CURRENT_SOURCE_DIR}/ml/backend/ggml/ggml/src/ggml-cp
 
 add_compile_definitions(NDEBUG GGML_VERSION=0x0 GGML_COMMIT=0x0)
 
+# Define GGML version variables for shared library SOVERSION
+# These are required by ggml/src/CMakeLists.txt for proper library versioning
+set(GGML_VERSION_MAJOR 0)
+set(GGML_VERSION_MINOR 0)
+set(GGML_VERSION_PATCH 0)
+set(GGML_VERSION "${GGML_VERSION_MAJOR}.${GGML_VERSION_MINOR}.${GGML_VERSION_PATCH}")
+
 set(GGML_CPU ON)
 add_subdirectory(${CMAKE_CURRENT_SOURCE_DIR}/ml/backend/ggml/ggml/src)
 set_property(TARGET ggml PROPERTY EXCLUDE_FROM_ALL TRUE)