Revert "Revert "Merge pull request swiftlang#40774 from buttaface/arch""

This reverts commit 8dc0528.

Author: MaxDesiatov

cmake/modules/SwiftConfigureSDK.cmake

@@ -63,7 +63,6 @@ function(_report_sdk prefix)
   if(NOT prefix IN_LIST SWIFT_DARWIN_PLATFORMS)
     foreach(arch ${SWIFT_SDK_${prefix}_ARCHITECTURES})
       message(STATUS "  ${arch} libc header path: ${SWIFT_SDK_${prefix}_ARCH_${arch}_LIBC_INCLUDE_DIRECTORY}")
-      message(STATUS "  ${arch} libc architecture specific header path: ${SWIFT_SDK_${prefix}_ARCH_${arch}_LIBC_ARCHITECTURE_INCLUDE_DIRECTORY}")
     endforeach()
   endif()
 
@@ -288,7 +287,6 @@ macro(configure_sdk_unix name architectures)
       swift_android_sysroot(android_sysroot)
       set(SWIFT_SDK_ANDROID_ARCH_${arch}_PATH "${android_sysroot}")
       set(SWIFT_SDK_ANDROID_ARCH_${arch}_LIBC_INCLUDE_DIRECTORY "${android_sysroot}/usr/include" CACHE STRING "Path to C library headers")
-      set(SWIFT_SDK_ANDROID_ARCH_${arch}_LIBC_ARCHITECTURE_INCLUDE_DIRECTORY "${android_sysroot}/usr/include" CACHE STRING "Path to C library architecture headers")
 
       if("${arch}" STREQUAL "armv7")
         set(SWIFT_SDK_ANDROID_ARCH_${arch}_NDK_TRIPLE "arm-linux-androideabi")
@@ -320,10 +318,8 @@ macro(configure_sdk_unix name architectures)
 
       if("${prefix}" STREQUAL "HAIKU")
         set(SWIFT_SDK_HAIKU_ARCH_${arch}_LIBC_INCLUDE_DIRECTORY "/system/develop/headers/posix" CACHE STRING "Path to C library headers")
-        set(SWIFT_SDK_HAIKU_ARCH_${arch}_LIBC_ARCHITECTURE_INCLUDE_DIRECTORY "/system/develop/headers" CACHE STRING "Path to C library architecture headers")
       else()
         set(SWIFT_SDK_${prefix}_ARCH_${arch}_LIBC_INCLUDE_DIRECTORY "/usr/include" CACHE STRING "Path to C library headers")
-        set(SWIFT_SDK_${prefix}_ARCH_${arch}_LIBC_ARCHITECTURE_INCLUDE_DIRECTORY "${SWIFT_SDK_${prefix}_ARCH_${arch}_LIBC_INCLUDE_DIRECTORY}/${CMAKE_LIBRARY_ARCHITECTURE}" CACHE STRING "Path to C library architecture headers")
       endif()
 
       if("${prefix}" STREQUAL "LINUX")
@@ -373,7 +369,6 @@ macro(configure_sdk_unix name architectures)
         set(SWIFT_SDK_WASI_ARCH_wasm32_PATH "${SWIFT_WASI_SYSROOT_PATH}")
         set(SWIFT_SDK_WASI_ARCH_wasm32_TRIPLE "wasm32-unknown-wasi")
         set(SWIFT_SDK_WASI_ARCH_wasm32_LIBC_INCLUDE_DIRECTORY "${SWIFT_WASI_SYSROOT_PATH}/include")
-        set(SWIFT_SDK_WASI_ARCH_wasm32_LIBC_ARCHITECTURE_INCLUDE_DIRECTORY "${SWIFT_WASI_SYSROOT_PATH}/include")
       else()
         message(FATAL_ERROR "unknown Unix OS: ${prefix}")
       endif()

stdlib/public/Platform/CMakeLists.txt

@@ -201,8 +201,7 @@ foreach(sdk ${SWIFT_SDKS})
         OUTPUT "${glibc_modulemap_out}"
         FLAGS
             "-DCMAKE_SDK=${sdk}"
-            "-DGLIBC_INCLUDE_PATH=${SWIFT_SDK_${sdk}_ARCH_${arch}_LIBC_INCLUDE_DIRECTORY}"
-            "-DGLIBC_ARCH_INCLUDE_PATH=${SWIFT_SDK_${sdk}_ARCH_${arch}_LIBC_ARCHITECTURE_INCLUDE_DIRECTORY}")
+            "-DGLIBC_INCLUDE_PATH=${SWIFT_SDK_${sdk}_ARCH_${arch}_LIBC_INCLUDE_DIRECTORY}")
 
     list(APPEND glibc_modulemap_target_list ${glibc_modulemap_target})
 
@@ -237,15 +236,12 @@ foreach(sdk ${SWIFT_SDKS})
 
       string(REPLACE "${SWIFT_SDK_${SWIFT_HOST_VARIANT_SDK}_ARCH_${arch}_PATH}"
         "" absolute_libc_include_path "${SWIFT_SDK_${sdk}_ARCH_${arch}_LIBC_INCLUDE_DIRECTORY}")
-      string(REPLACE "${SWIFT_SDK_${SWIFT_HOST_VARIANT_SDK}_ARCH_${arch}_PATH}"
-        "" absolute_libc_arch_include_path ${SWIFT_SDK_${sdk}_ARCH_${arch}_LIBC_ARCHITECTURE_INCLUDE_DIRECTORY})
 
       handle_gyb_source_single(glibc_modulemap_native_target
         SOURCE "${glibc_modulemap_source}"
         OUTPUT "${glibc_sysroot_relative_modulemap_out}"
         FLAGS "-DCMAKE_SDK=${sdk}"
-              "-DGLIBC_INCLUDE_PATH=${absolute_libc_include_path}"
-              "-DGLIBC_ARCH_INCLUDE_PATH=${absolute_libc_arch_include_path}")
+              "-DGLIBC_INCLUDE_PATH=${absolute_libc_include_path}")
 
       list(APPEND glibc_modulemap_target_list ${glibc_modulemap_native_target})
       set(glibc_modulemap_out ${glibc_sysroot_relative_modulemap_out})