更改了xmake工程的配置

arch/arm/typedef.h

@@ -0,0 +1,29 @@
+#ifndef __TYPEDEF_H__
+#define __TYPEDEF_H__
+
+#define NULL 0
+
+typedef unsigned char       uint8_t;                                               
+typedef unsigned short int  uint16_t;                                             
+typedef unsigned int        uint32_t;                                         
+typedef unsigned long long  uint64_t;                                           
+
+typedef signed char         int8_t;                                              
+typedef signed short int    int16_t;                                     
+typedef signed int          int32_t;                                           
+typedef signed long long    int64_t;                                              
+
+typedef volatile uint8_t      vuint8_t;                                       
+typedef volatile uint16_t     vuint16_t;                                 
+typedef volatile uint32_t     vuint32_t;                                    
+typedef volatile uint64_t     vuint64_t;                                 
+
+typedef volatile int8_t       vint8_t;                                         
+typedef volatile int16_t      vint16_t;
+typedef volatile int32_t      vint32_t;
+typedef volatile int64_t      vint64_t;
+
+typedef int64_t intmax_t;
+typedef uint64_t uintmax_t;
+
+#endif

include/stdarg.h

@@ -1,9 +1,9 @@
 #ifndef __STDARG_H__
 #define __STDARG_H__
 
-typedef char * va_list;   
+#define va_list       __builtin_va_list 
 #define va_start(v,l)	__builtin_va_start(v,l)
-#define va_end(v)		__builtin_va_end(v)
+#define va_end(v)		  __builtin_va_end(v)
 #define va_arg(v,l)		__builtin_va_arg(v,l)
 #define va_copy(d,s)	__builtin_va_copy(d,s)
 

src/stdio.c

@@ -83,7 +83,7 @@ int print(const char *str, ...)
                 ptr_string++;
                 continue;
             case 'c':
-                arg_int_val = va_arg(ptr_args, int);
+                arg_int_val = va_arg(ptr_args, char);
                 m_putc((char)arg_int_val);
                 ret_num++;
                 ptr_string++;

toolchains/riscv-none-embed.lua

@@ -0,0 +1,13 @@
+PATH = "D:\\RT-ThreadStudio\\repo\\Extract\\ToolChain_Support_Packages\\WCH\\RISC-V-GCC-WCH\\8.2.0"
+BIN_DIR = PATH .. "\\bin"
+PREFIX = "riscv-none-embed-"
+
+TOOLCHAIN_NAME = "riscv-none-embed"
+
+toolchain(TOOLCHAIN_NAME)
+
+    set_kind("standalone")
+    set_sdkdir(PATH)
+    set_bindir(BIN_DIR)
+
+toolchain_end()

toolchains/riscv64-unknown-elf.lua

@@ -1,20 +1,13 @@
+PATH = "E:\\toolchain\\riscv64-unknown-elf-toolchain-10.2.0-2020.12.8-x86_64-w64-mingw32"
+BINDIR =PATH.."\\bin"
+PREFIX = "riscv64-unknown-elf-"
 
-PATH = "E:\toolchain\riscv64-unknown-elf-toolchain-10.2.0-2020.12.8-x86_64-w64-mingw32"
+TOOLCHAIN_NAME = "riscv64-unknown-elf"
 
 toolchain("riscv64-unknown-elf")
+
     set_kind("standalone")
-    set_bindir("E:/toolchain/riscv64-unknown-elf-toolchain-10.2.0-2020.12.8-x86_64-w64-mingw32/bin")
-    set_toolset("cc", "$PATH\bin\riscv64-unknown-elf-gcc.exe")
-    set_toolset("cxx", "$PATH\bin\riscv64-unknown-elf-g++.exe")
-    set_toolset("ld", "$PATH\bin\riscv64-unknown-elf-ld.exe")
-    --set_toolset("sh", "$PATH\bin\riscv64-unknown-elf-gcc-sh.exe")
-    set_toolset("ar", "$PATH\bin\riscv64-unknown-elf-gcc-ar.exe")
-    set_toolset("ex", "$PATH\bin\riscv64-unknown-elf-gcc-ar.exe")
-    set_toolset("strip", "$PATH\bin\riscv64-unknown-elf-strip.exe")
-    set_toolset("mm", "$PATH\bin\riscv64-unknown-elf-gcc.exe")
-    set_toolset("mxx", "$PATH\bin\riscv64-unknown-elf-gcc.exe", "$PATH\bin\riscv64-unknown-elf-g++.exe")
-    set_toolset("as", "$PATH\bin\riscv64-unknown-elf-gcc.exe")
+    set_sdkdir(PATH)
+    set_bindir(BINDIR)
 
 toolchain_end()
-
-

xmake.lua

@@ -3,29 +3,33 @@ add_rules("mode.debug", "mode.release")
 -- add toolchains
 includes("toolchains/*.lua")
 
+DEVICE = ' -march=rv32imac -mabi=ilp32 -DUSE_PLIC -DUSE_M_TIME -DNO_INIT -mcmodel=medany -msmall-data-limit=8 -L.  -nostartfiles  -lc '
 --set target
 target("mlibc")
-    --set static lib
+    -- set target file type
     set_kind("static")
     --strip all infomation
     set_strip("all")
-    --use cross compiler
-    set_plat("cross")
     --set default target
     set_default(true)
-    --set target file Extension
-    set_extension(".a")
+    -- set target dir
+    set_targetdir("./")
+    --set target filename
+    set_filename("mlibc.a")
     --set optimize O1
     set_optimize("fast")
     --set languages standard
     set_languages("c99", "cxx11")
-
-    add_cflags("-nostdlib", {force = true})
-
-    add_files("src/**.c")
+    -- set compiler cflags for device
+    add_cflags(DEVICE, {force = true})
+    -- set compiler cflags for no standard library
+    add_cflags("-nostdlib","-ffreestanding", {force = true})
+    -- add all files
+    add_files("src/*.c")
+    -- add headfile dir
     add_includedirs("include",{public = true})
-    set_toolchains("riscv64-unknown-elf")
-
+    -- set_toolchains("riscv64-unknown-elf")
+    set_toolchains("riscv-none-embed")
 target_end() 
 
 --