[reactos] 01/01: [SDK][CMAKE] config.cmake: Add ARM64 compiler options (#4050)

[Konrad Dybcio]

https://git.reactos.org/?p=reactos.git;a=commitdiff;h=b5e57a8523ad995aabf604...

commit b5e57a8523ad995aabf6043e14f56c14c66c7410
Author:     Konrad Dybcio [e-mail]
AuthorDate: Wed Oct 20 12:19:27 2021 +0200
Commit:     Stanislav Motylkov [e-mail]
CommitDate: Wed Nov 17 14:18:06 2021 +0300

[SDK][CMAKE] config.cmake: Add ARM64 compiler options (#4050)

Add generic compiler options for ARM64.

Signed-off-by: Konrad Dybcio [e-mail]
---
 sdk/cmake/config.cmake | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/sdk/cmake/config.cmake b/sdk/cmake/config.cmake
index f0c2850c86c..020f0c7eda4 100644
--- a/sdk/cmake/config.cmake
+++ b/sdk/cmake/config.cmake
@@ -10,6 +10,12 @@ elseif(ARCH STREQUAL "arm")
     set(SARCH "omap3-zoom2" CACHE STRING
     "Sub-architecture (board) to build for. Specify one of:
      kurobox versatile omap3-zoom2 omap3-beagle")
+elseif(ARCH STREQUAL "arm64")
+    # By design, arm64 kernels and OSes should be intercompatible, but
+    # due to SoC vendors seemingly not being able to follow ARM design guidelines
+    # properly, there might be a need for board-specific builds later on...
+    set(SARCH "" CACHE STRING
+    "Sub-architecture (board) to build for.")
 endif()

if(ARCH STREQUAL "i386")
@@ -24,6 +30,12 @@ elseif(ARCH STREQUAL "arm")
     set(OARCH "armv7-a" CACHE STRING
     "Generate instructions for this CPU type. Specify one of:
      armv5te armv7-a")
+elseif(ARCH STREQUAL "arm64")
+    # This should not be bumped unless REALLY needed, because (as of 2021)
+    # there are still new designs using the original A53 cores w/ armv8.0.
+    set(OARCH "armv8-a" CACHE STRING
+    "Generate instructions for this CPU type. Specify one of:
+     armv8-a armv8.1-a armv8.2-a armv8.3-a armv8.4-a armv8.5-a armv8.6-a")
 endif()

if(ARCH STREQUAL "i386" OR ARCH STREQUAL "amd64")
@@ -32,6 +44,9 @@ if(ARCH STREQUAL "i386" OR ARCH STREQUAL "amd64")
 elseif(ARCH STREQUAL "arm")
     set(TUNE "generic-armv7-a" CACHE STRING
     "Which CPU ReactOS should be optimized for.")
+elseif(ARCH STREQUAL "arm64")
+    set(TUNE "generic" CACHE STRING
+    "Which CPU ReactOS should be optimized for.")
 endif()

set(OPTIMIZE "4" CACHE STRING