From 165130ef99822ab7c8a8765e7f593522b9faa925 Mon Sep 17 00:00:00 2001
From: "Luke T. Shumaker" <lukeshu@lukeshu.com>
Date: Mon, 4 Nov 2024 12:47:28 -0700
Subject: wip picolibc

---
 CMakeLists.txt | 30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)

(limited to 'CMakeLists.txt')

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 100214c..76e31ef 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -10,6 +10,11 @@ if (NOT PICO_PLATFORM)
 endif()
 
 set(PICO_SDK_PATH "${CMAKE_SOURCE_DIR}/3rd-party/pico-sdk")
+
+if (PICO_PLATFORM STREQUAL "rp2040")
+	set(PICO_CLIB "picolibc")
+	add_library(pico_cxx_options INTERFACE)
+endif()
 include("${PICO_SDK_PATH}/external/pico_sdk_import.cmake")
 
 project(sbc_harness)
@@ -62,6 +67,31 @@ function(add_stack_analysis arg_outfile arg_objlib_target)
 	)
 endfunction()
 
+if (PICO_PLATFORM STREQUAL "rp2040")
+	set(TESTS ON)
+	add_subdirectory(3rd-party/picolibc)
+
+	foreach(lib IN ITEMS pico_clib_interface)
+		# cpp
+		target_include_directories(${lib} INTERFACE ${CMAKE_BINARY_DIR}/3rd-party/picolibc/picolibc/include)
+		target_compile_definitions(${lib} INTERFACE
+			PICO_RUNTIME_NO_INIT_PER_CORE_TLS_SETUP=1
+			PICO_RUNTIME_SKIP_INIT_PER_CORE_TLS_SETUP=1
+		)
+
+		# cc
+		target_compile_options(${lib} INTERFACE --specs=${CMAKE_BINARY_DIR}/3rd-party/picolibc/picolibc.specs)
+		target_compile_options(${lib} INTERFACE -nolibc)
+
+		# ld
+		target_link_options(   ${lib} INTERFACE --specs=${CMAKE_BINARY_DIR}/3rd-party/picolibc/picolibc.specs)
+		target_link_options(   ${lib} INTERFACE -nolibc -lgcc)
+		target_link_libraries( ${lib} INTERFACE c)
+	endforeach()
+	target_link_options(   bs2_default PRIVATE --specs=${CMAKE_BINARY_DIR}/3rd-party/picolibc/picolibc.specs -nolibc -lgcc)
+	target_link_libraries( bs2_default c)
+endif()
+
 add_subdirectory(libcr)
 add_subdirectory(libcr_ipc)
 add_subdirectory(libmisc)
-- 
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