From ec68cec6c84e5dc9acaf7828c0118bb71fffc561 Mon Sep 17 00:00:00 2001
From: Guillaume Solignac <gsoligna@cisco.com>
Date: Thu, 9 Jan 2025 03:19:31 -0800
Subject: build: expose VPP_PLATFORM to out-of-tree plugins

We move the VPP_PLATFORM logic from src/CMakeLists.txt to
cmake/cpu.cmake so that out-of-tree plugins can leverage it as well.

Type: improvement
Signed-off-by: Guillaume Solignac <gsoligna@cisco.com>
Change-Id: I767a75f45c07aed7db4034b18ab4b5c67fda06ee
---
 src/cmake/CMakeLists.txt | 10 ++++++++++
 src/cmake/cpu.cmake      | 25 +++++++++++++++++++++++++
 2 files changed, 35 insertions(+)

(limited to 'src/cmake')

diff --git a/src/cmake/CMakeLists.txt b/src/cmake/CMakeLists.txt
index 74cd385a1ce..8f7ad0e8513 100644
--- a/src/cmake/CMakeLists.txt
+++ b/src/cmake/CMakeLists.txt
@@ -25,3 +25,13 @@ install(
 
   COMPONENT vpp-dev
 )
+
+install(
+  DIRECTORY
+  platform/
+
+  DESTINATION
+  ${VPP_LIBRARY_DIR}/cmake/vpp/platform
+
+  COMPONENT vpp-dev
+)
diff --git a/src/cmake/cpu.cmake b/src/cmake/cpu.cmake
index 25e966dcf7a..b1b802a5506 100644
--- a/src/cmake/cpu.cmake
+++ b/src/cmake/cpu.cmake
@@ -21,6 +21,31 @@ macro(set_log2_cacheline_size var n)
   endif()
 endmacro()
 
+##############################################################################
+# Platform selection
+##############################################################################
+
+if(DEFINED VPP_PLATFORM AND VPP_PLATFORM STREQUAL "default")
+  unset(VPP_PLATFORM)
+  unset(VPP_PLATFORM CACHE)
+  set(VPP_PLATFORM_NAME "default")
+elseif(DEFINED VPP_PLATFORM)
+	set(platform_file ${CMAKE_CURRENT_LIST_DIR}/platform/${VPP_PLATFORM}.cmake)
+  if(NOT EXISTS ${platform_file})
+     message(FATAL_ERROR "unknown platform ${VPP_PLATFORM}")
+  endif()
+  include(${platform_file})
+  set(VPP_PLATFORM_NAME ${VPP_PLATFORM})
+else()
+  set(VPP_PLATFORM_NAME "default")
+endif()
+
+if (DEFINED VPP_PLATFORM_C_COMPILER_NAMES)
+  set(CMAKE_C_COMPILER_NAMES ${VPP_PLATFORM_C_COMPILER_NAME})
+else()
+  set(CMAKE_C_COMPILER_NAMES clang gcc cc)
+endif()
+
 ##############################################################################
 # Cache line size
 ##############################################################################
-- 
cgit