From ae7dec2dd7e6e4795daff9e706bb27d2f1dd3595 Mon Sep 17 00:00:00 2001
From: Nicklas Larsson <n_larsson@yahoo.com>
Date: Wed, 6 May 2026 09:16:42 +0200
Subject: [PATCH] cmake: set BUILD_ARCH with CMAKE_HOST_SYSTEM_PROCESSOR

Remove custom function 'get_host_arch'.
---
 CMakeLists.txt                    |  3 +--
 cmake/modules/get_host_arch.cmake | 44 -------------------------------
 2 files changed, 1 insertion(+), 46 deletions(-)
 delete mode 100644 cmake/modules/get_host_arch.cmake

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 62d49823b47..df896e8dd7a 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -154,8 +154,7 @@ option(WITH_FHS "Install with FHS" OFF)
 include(check_target)
 include(CheckDependentLibraries)
 
-include(get_host_arch)
-get_host_arch(BUILD_ARCH)
+set(BUILD_ARCH ${CMAKE_HOST_SYSTEM_PROCESSOR})
 
 # Setup GRASS install directories
 include(GRASSInstallDirs)
diff --git a/cmake/modules/get_host_arch.cmake b/cmake/modules/get_host_arch.cmake
deleted file mode 100644
index ff12c2539f8..00000000000
--- a/cmake/modules/get_host_arch.cmake
+++ /dev/null
@@ -1,44 +0,0 @@
-#[[
-AUTHOR(S):  Rashad Kanavath <rashad km gmail>
-PURPOSE:    Get host system architecture
-COPYRIGHT:  (C) 2020 by the GRASS Development Team
-
-SPDX-License-Identifier: GPL-2.0-or-later
-#]]
-
-function(get_host_arch var_arch)
-  set(host_arch_value "x86_64") # default value
-
-  if(WIN32)
-    if(MSVC)
-      execute_process(
-        COMMAND ${CMAKE_C_COMPILER}
-        ERROR_VARIABLE ev
-        OUTPUT_VARIABLE ov
-        OUTPUT_QUIET OUTPUT_STRIP_TRAILING_WHITESPACE)
-
-      if("${ev}" MATCHES "x86")
-        set(${host_arch_value} "x86")
-      else()
-        set(${host_arch_value} "x86_64")
-      endif()
-
-    elseif(MINGW)
-
-    else()
-      message(FATAL_ERROR "compiler/platform is not supported")
-    endif() # if(MSVC)
-
-  elseif(UNIX)
-    execute_process(
-      COMMAND uname -m
-      ERROR_VARIABLE ev
-      OUTPUT_VARIABLE ov
-      OUTPUT_STRIP_TRAILING_WHITESPACE)
-    set(${host_arch_value} "${ov}")
-  endif()
-
-  set(${var_arch}
-      ${host_arch_value}
-      PARENT_SCOPE)
-endfunction()