From bc264b80f793a0845a26d9b8ea1d836b356574d5 Mon Sep 17 00:00:00 2001
From: Christian Kastner <ckk@kvr.at>
Date: Sun, 2 Feb 2025 20:12:44 +0100
Subject: [PATCH] cmake: Add ability to pass in GGML_BUILD_NUMBER

This makes git as a dependency optional, and is useful in the case where
ggml is built not from git, but from a tarball, or a distribution source
package.

This conditional also affects GGML_BUILD_COMMIT. Nothing seems to be
using it, though, so there doesn't seem much value factor it out, or
even require it.
---
 CMakeLists.txt | 31 +++++++++++++++++--------------
 1 file changed, 17 insertions(+), 14 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 7c069e420..75b5ea3b4 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -274,22 +274,25 @@ endif()
 
 # Generate version info based on git commit.
 
-find_program(GIT_EXE NAMES git git.exe REQUIRED NO_CMAKE_FIND_ROOT_PATH)
-execute_process(COMMAND ${GIT_EXE} rev-list --count HEAD
-    WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
-    OUTPUT_VARIABLE GGML_BUILD_NUMBER
-    OUTPUT_STRIP_TRAILING_WHITESPACE
-)
-
-if(GGML_BUILD_NUMBER EQUAL 1)
-    message(WARNING "GGML build version fixed at 1 likely due to a shallow clone.")
+if(NOT DEFINED GGML_BUILD_NUMBER)
+    find_program(GIT_EXE NAMES git git.exe REQUIRED NO_CMAKE_FIND_ROOT_PATH)
+    execute_process(COMMAND ${GIT_EXE} rev-list --count HEAD
+        WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
+        OUTPUT_VARIABLE GGML_BUILD_NUMBER
+        OUTPUT_STRIP_TRAILING_WHITESPACE
+    )
+
+    if(GGML_BUILD_NUMBER EQUAL 1)
+        message(WARNING "GGML build version fixed at 1 likely due to a shallow clone.")
+    endif()
+
+    execute_process(COMMAND ${GIT_EXE} rev-parse --short HEAD
+        WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
+        OUTPUT_VARIABLE GGML_BUILD_COMMIT
+        OUTPUT_STRIP_TRAILING_WHITESPACE
+    )
 endif()
 
-execute_process(COMMAND ${GIT_EXE} rev-parse --short HEAD
-    WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
-    OUTPUT_VARIABLE GGML_BUILD_COMMIT
-    OUTPUT_STRIP_TRAILING_WHITESPACE
-)
 
 # Capture variables prefixed with GGML_.