From 1094d0c0dbd0f37ccc0f1d18c73c6066e5690664 Mon Sep 17 00:00:00 2001
From: dundargoc <gocdundar@gmail.com>
Date: Mon, 23 Oct 2023 22:32:32 +0200
Subject: [PATCH] build: add CMAKE_C_FLAGS to --version output

Closes https://github.com/neovim/neovim/issues/25754.
---
 cmake.config/CMakeLists.txt      | 6 ++++++
 cmake.config/versiondef.h.in     | 2 +-
 cmake.config/versiondef_old.h.in | 2 +-
 3 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/cmake.config/CMakeLists.txt b/cmake.config/CMakeLists.txt
index 1b175475ee..d831d26312 100644
--- a/cmake.config/CMakeLists.txt
+++ b/cmake.config/CMakeLists.txt
@@ -161,6 +161,12 @@ configure_file (
   "${PROJECT_BINARY_DIR}/cmake.config/auto/config.h"
   )
 
+# Prevent double space in --version output if CMAKE_C_FLAGS is empty
+set(C_FLAGS_VERSION_OUTPUT ${CMAKE_C_FLAGS})
+if(C_FLAGS_VERSION_OUTPUT)
+  string(PREPEND C_FLAGS_VERSION_OUTPUT " ")
+endif()
+
 if(${CMAKE_VERSION} VERSION_GREATER_EQUAL 3.15)
   configure_file(versiondef.h.in auto/versiondef.h.gen)
 else()
diff --git a/cmake.config/versiondef.h.in b/cmake.config/versiondef.h.in
index b328c1fa00..bda21b27ec 100644
--- a/cmake.config/versiondef.h.in
+++ b/cmake.config/versiondef.h.in
@@ -15,7 +15,7 @@
 #define NVIM_API_LEVEL_COMPAT @NVIM_API_LEVEL_COMPAT@
 #define NVIM_API_PRERELEASE @NVIM_API_PRERELEASE@
 
-#define NVIM_VERSION_CFLAGS "${CMAKE_C_COMPILER} $<$<CONFIG:Debug>:${CMAKE_C_FLAGS_DEBUG}>$<$<CONFIG:Release>:${CMAKE_C_FLAGS_RELEASE}>$<$<CONFIG:RelWithDebInfo>:${CMAKE_C_FLAGS_RELWITHDEBINFO}>$<$<CONFIG:MinSizeRel>:${CMAKE_C_FLAGS_MINSIZEREL}> $<JOIN:$<TARGET_PROPERTY:nvim,COMPILE_OPTIONS>, > -D$<JOIN:$<TARGET_PROPERTY:nvim,COMPILE_DEFINITIONS>, -D> -I$<JOIN:$<REMOVE_DUPLICATES:$<TARGET_PROPERTY:nvim,INCLUDE_DIRECTORIES>>, -I>"
+#define NVIM_VERSION_CFLAGS "${CMAKE_C_COMPILER}${C_FLAGS_VERSION_OUTPUT} $<$<CONFIG:Debug>:${CMAKE_C_FLAGS_DEBUG}>$<$<CONFIG:Release>:${CMAKE_C_FLAGS_RELEASE}>$<$<CONFIG:RelWithDebInfo>:${CMAKE_C_FLAGS_RELWITHDEBINFO}>$<$<CONFIG:MinSizeRel>:${CMAKE_C_FLAGS_MINSIZEREL}> $<JOIN:$<TARGET_PROPERTY:nvim,COMPILE_OPTIONS>, > -D$<JOIN:$<TARGET_PROPERTY:nvim,COMPILE_DEFINITIONS>, -D> -I$<JOIN:$<REMOVE_DUPLICATES:$<TARGET_PROPERTY:nvim,INCLUDE_DIRECTORIES>>, -I>"
 #define NVIM_VERSION_BUILD_TYPE "$<CONFIG>"
 
 #endif  // AUTO_VERSIONDEF_H
diff --git a/cmake.config/versiondef_old.h.in b/cmake.config/versiondef_old.h.in
index a4c0cfa2d9..4e21e0c7be 100644
--- a/cmake.config/versiondef_old.h.in
+++ b/cmake.config/versiondef_old.h.in
@@ -15,7 +15,7 @@
 #define NVIM_API_LEVEL_COMPAT @NVIM_API_LEVEL_COMPAT@
 #define NVIM_API_PRERELEASE @NVIM_API_PRERELEASE@
 
-#define NVIM_VERSION_CFLAGS "${CMAKE_C_COMPILER} $<$<CONFIG:Debug>:${CMAKE_C_FLAGS_DEBUG}>$<$<CONFIG:Release>:${CMAKE_C_FLAGS_RELEASE}>$<$<CONFIG:RelWithDebInfo>:${CMAKE_C_FLAGS_RELWITHDEBINFO}>$<$<CONFIG:MinSizeRel>:${CMAKE_C_FLAGS_MINSIZEREL}> $<JOIN:$<TARGET_PROPERTY:nvim,COMPILE_OPTIONS>, > -D$<JOIN:$<TARGET_PROPERTY:nvim,COMPILE_DEFINITIONS>, -D> -I$<JOIN:$<TARGET_PROPERTY:nvim,INCLUDE_DIRECTORIES>, -I>"
+#define NVIM_VERSION_CFLAGS "${CMAKE_C_COMPILER}${C_FLAGS_VERSION_OUTPUT} $<$<CONFIG:Debug>:${CMAKE_C_FLAGS_DEBUG}>$<$<CONFIG:Release>:${CMAKE_C_FLAGS_RELEASE}>$<$<CONFIG:RelWithDebInfo>:${CMAKE_C_FLAGS_RELWITHDEBINFO}>$<$<CONFIG:MinSizeRel>:${CMAKE_C_FLAGS_MINSIZEREL}> $<JOIN:$<TARGET_PROPERTY:nvim,COMPILE_OPTIONS>, > -D$<JOIN:$<TARGET_PROPERTY:nvim,COMPILE_DEFINITIONS>, -D> -I$<JOIN:$<TARGET_PROPERTY:nvim,INCLUDE_DIRECTORIES>, -I>"
 #define NVIM_VERSION_BUILD_TYPE "$<CONFIG>"
 
 #endif  // AUTO_VERSIONDEF_H