Added toolchain file

riscv32-toolchain.cmake

@@ -0,0 +1,151 @@
+# ###############################
+# WCH(RISC-V) toolchain file for the ch32v003
+# ###############################
+
+# ----------------------------------------
+# File: riscv64-toolchain.cmake
+# Description: Cmake file for the WCH controllers. It has two differnt
+# types of kinds things it can output. It can output or build release binaries
+# or it output debug builds.
+# ----------------------------------------
+
+
+
+
+##################################################
+# Configurable Section
+##################################################
+# Specify the cross-compiler
+#set(CROSS_TOOLCHAIN riscv32-unknown-elf-)
+#set(CROSS_TOOLCHAIN riscv64-unknown-elf-)
+set(CMAKE_SYSTEM_NAME Generic)
+set(CMAKE_SYSTEM_PROCESSOR riscv)
+set(CMAKE_SYSTEM_PROCESSOR "CUSTOM")
+set(DEBUG_BINARY 1)
+set(CMAKE_SYSTEM_VERSION 1)
+
+
+
+# This logic checks the operating system.
+if(${CMAKE_HOST_SYSTEM_NAME} STREQUAL "FreeBSD")
+    message("OS:: FreeBSD")
+    set(NEWLIB /usr/local/riscv/riscv64-unknown-elf/include)
+    set(CMAKE_C_COMPILER riscv64-unknown-elf-gcc)
+    set(CMAKE_CXX_COMPILER riscv64-unknown-elf-g++)
+    set(CMAKE_FIND_ROOT_PATH /usr/local/riscv/)
+    #set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} --sysroot=${NEWLIB}")
+    #set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} --sysroot=${NEWLIB}")
+    # Without these two lines it freaks out.
+    set(CMAKE_C_STANDARD_COMPUTED_DEFAULT GNU)
+    set(CMAKE_CXX_STANDARD_COMPUTED_DEFAULT GNU)
+
+elseif(${CMAKE_HOST_SYSTEM_NAME} STREQUAL "Linux")
+    message("OS:: LINUX")
+else()
+    message("OS:: UNKNOWN?")
+    message("Please add your OS details to the toolchain file.")
+endif()
+
+# Find the Newlib
+
+# Find the ch32v003fun
+
+#
+
+
+# ----------------------------------------
+# MCU Setup
+# ----------------------------------------
+
+
+#this really shouldn't be needed as it's also defined in the
+# `/inc/funconfig.h` file.
+
+# Specify the exact Chip
+#set(MCU CH32V003J4M6)
+#set(MCU CH32V003A4M6)
+#set(MCU CH32V003F4P6)
+#set(MCU CH32V003F4U6)
+set(MCU CH32V003)
+
+#Define it for the preprocessor as well.
+add_compile_definitions(${MCU})
+
+#add_definitions(-D${MCU})
+
+
+##################################################
+# Advanced Section
+##################################################
+
+
+
+#-------------------
+# General Flags
+#-------------------
+
+set(OBJECT_GEN_FLAGS "\
+-g \
+-Os \
+-flto \
+-ffunction-sections \
+-fdata-sections \
+-fmessage-length=0 \
+-msmall-data-limit=8 ")
+
+#-------------------
+# CFLAGS for ARCH
+#-------------------
+
+set(C_FLAGS_ARCH "\
+-march=rv32ec \
+-mabi=ilp32e \
+-I${NEWLIB} \
+-nostdlib")
+
+#-------------------
+# CFLAGS
+#-------------------
+
+# I'm appending to the existing cflags from the cmake file in the root dir.
+set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} \
+${C_FLAGS_ARCH} \
+${OBJECT_GEN_FLAGS}")
+
+
+#-------------------
+# ASMFLAGS for cross
+#-------------------
+
+
+#-------------------
+# LFLAGS for cross
+#-------------------
+
+#set(LINKER_SCRIPT ${CMAKE_CURRENT_SOURCE_DIR}/${LINKER_SCRIPT})
+set(LINKER_SCRIPT "./src/ch32v003.ld")
+
+#set(LD_FLAGS "-lgcc")
+set(LD_FLAGS " \
+    -Wl,--print-memory-usage \
+    -Wl,-Map=${PROJECT_NAME}.map \
+    -lgcc \
+    -T ${LINKER_SCRIPT} \
+    -Wl,--gc-sections")
+
+
+
+#-------------------
+# Print out info 
+#-------------------
+
+message(STATUS "CMAKE_C_FLAGS: ${CMAKE_C_FLAGS}")
+message(STATUS "CMAKE_INCLUDE_PATH: ${CMAKE_INCLUDE_PATH}")
+message(STATUS "CMAKE_FIND_ROOT_PATH: ${CMAKE_FIND_ROOT_PATH}")
+
+
+
+# Unset all cache
+unset(SEMIHOSTING)
+unset(CMAKE_TOOLCHAIN_FILE)
+unset(CMAKE_BUILD_TYPE)