From ccb9dbd3f78d9f06826560bd54519bab3477947a Mon Sep 17 00:00:00 2001
From: Alexey Gavrilov <alexey.gavrilov@mail.com>
Date: Thu, 23 Jul 2026 14:37:44 +0700
Subject: Include cmake feature module in the build routine

Add predicate `ifFeatureEnables` that checks feature is define or not,
and return accordingly boolean value.

Consider some cmake objective targets as features. Populate information
to these targets, and provides in particular file `CMakeFeatures.txt`.
Cpuid, MSR, ACPI and driver VGA in text mode they are.

Signed-off-by: Alexey Gavrilov <alexey.gavrilov@mail.com>
---
 arch/x86/cpuid/CMakeLists.txt | 68 +++++++++++++++++++++++++++++--------------
 1 file changed, 46 insertions(+), 22 deletions(-)

(limited to 'arch/x86/cpuid/CMakeLists.txt')

diff --git a/arch/x86/cpuid/CMakeLists.txt b/arch/x86/cpuid/CMakeLists.txt
index e6af515..6833df5 100644
--- a/arch/x86/cpuid/CMakeLists.txt
+++ b/arch/x86/cpuid/CMakeLists.txt
@@ -16,32 +16,56 @@
  * ObjectiveOS. If not, see <https://www.gnu.org/licenses/>. 
  ]]
 
-add_library(CPUID STATIC)
-target_link_libraries(CPUID PUBLIC CXX_COMPILER_REQUIREMENTS)
+set(IS_CPUID_DEFINES TRUE)
+ifFeatureEnables(CPUID IS_CPUID_DEFINES)
 
-target_sources(CPUID PRIVATE
-    ${CMAKE_CURRENT_LIST_DIR}/Cpuid.cpp
-)
+if(NOT IS_CPUID_DEFINES)
+    add_library(CPUID INTERFACE)
+else()
 
-target_sources(CPUID
-    PUBLIC
-        FILE_SET HEADERS
-        BASE_DIRS
-            ${CMAKE_CURRENT_LIST_DIR}
-        FILES
-            ${CMAKE_CURRENT_LIST_DIR}/Cpuid.h
-)
+    target_compile_definitions(CXX_COMPILER_REQUIREMENTS INTERFACE
+        FEATRUE_CPUID
+    )
 
-target_link_libraries(Architecture INTERFACE CPUID)
+    add_library(CPUID STATIC)
 
-add_library(CPUIDASM OBJECT)
+    target_link_libraries(CPUID PUBLIC CXX_COMPILER_REQUIREMENTS)
 
-target_sources(CPUIDASM PRIVATE
-    ${CMAKE_CURRENT_LIST_DIR}/CpuidCheck.nasm
-)
+    target_sources(CPUID PRIVATE
+        ${CMAKE_CURRENT_LIST_DIR}/Cpuid.cpp
+    )
 
-target_link_libraries(CPUIDASM PUBLIC
-    ASM_NASM_COMPILER_REQUIREMENTS
-)
+    target_sources(CPUID
+        PUBLIC
+            FILE_SET HEADERS
+            BASE_DIRS
+                ${CMAKE_CURRENT_LIST_DIR}
+            FILES
+                ${CMAKE_CURRENT_LIST_DIR}/Cpuid.h
+    )
 
-target_sources(ArchitectureAssemblerSources PRIVATE $<TARGET_OBJECTS:CPUIDASM>)
+    target_link_libraries(Architecture INTERFACE CPUID)
+
+    add_library(CPUIDASM OBJECT)
+
+    target_sources(CPUIDASM PRIVATE
+        ${CMAKE_CURRENT_LIST_DIR}/CpuidCheck.nasm
+    )
+
+    target_link_libraries(CPUIDASM PUBLIC
+        ASM_NASM_COMPILER_REQUIREMENTS
+    )
+
+    target_sources(ArchitectureAssemblerSources PRIVATE $<TARGET_OBJECTS:CPUIDASM>)
+endif()
+
+startFeatureRecording(CPUID)
+
+setFeatureField(NAME "cpuid extension")
+setFeatureField(HASHCOMMIT "e3e68862bbc731802efc39cbfb1b6df7ab255204")
+setFeatureField(DESCRIPTION "This feature makes available to use cpuid"
+    "processor's function")
+setFeatureField(TAGS "NEW;MULTIPLATFORM")
+setFeatureField(AUTHORSHIP "Alexey Gavrilov <alexey.gavrilov@mail.com>")
+
+saveFeatureRecording()
-- 
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