最近又作了一些C51的工作，发现keil c51与 mdk 有冲突。
然后上网一查果然有很多人遇到这个问题，错误提示为下图：
其实这个是MDK和KEIL C51 配置文件冲突的问题，可以参考下两个人的配置文件：
[C51]
PATH="D:\Program Files\Keil_C702\c51" （修改添加部分）
BOOK0=HLP\RELEASE_NOTES.HTM("Release Notes")
BOOK1=HLP\GS51.PDF("uVision2 Getting Started")
BOOK2=HLP\C51.PDF("C51 User's Guide")
BOOK3=HLP\C51LIB.CHM("C51 Library Functions",C)
BOOK4=HLP\A51.PDF("Assembler/Utilities")
BOOK5=HLP\TR51.CHM("RTX51 Tiny User's Guide")
BOOK6=HLP\DBG51.CHM("uVision2 Debug Commands")
BOOK7=ISD51\ISD51.HTM("ISD51 In System Debugger")
BOOK8=MON390\MON390.HTM("MON390: Dallas Contiguous Mode Monitor")
TDRV0=BIN\MON51.DLL ("Keil Monitor-51 Driver")
TDRV1=BIN\ISD51.DLL ("Keil ISD51 In-System Debugger")
TDRV2=BIN\MON390.DLL ("MON390: Dallas Contiguous Mode")
TDRV3=BIN\LPC2EMP.DLL ("LPC900 EPM Emulator/Programmer")
RTOS1=RTXTINY.DLL ("RTX-51 Tiny")
RTOS2=RTX51.DLL ("RTX-51 Full")
Version=V7.0
==============================================================
[ARM]
PATH="D:\Program Files\MDK4.10\ARM\"
VERSION=4.10
PATH1="C:\Program Files\CodeSourcery\Sourcery G++ Lite\"
TOOLPREFIX=arm-none-eabi-
CPUDLL0=SARM.DLL(TDRV0,TDRV5,TDRV6,TDRV10) # Drivers for ARM7/9 devices
CPUDLL1=SARMCM3.DLL(TDRV1,TDRV2,TDRV3,TDRV4,TDRV5,TDRV7,TDRV8,TDRV9) # Drivers for Cortex-M devices
BOOK0="HLP\RELEASE_NOTES.HTM" ("Release Notes",GEN)
BOOK1="HLP\ARMTOOLS.chm" ("Complete User's Guide Selection",C)
BOOK2="HLP\RL_RELEASE_NOTES.HTM" ("RTL-ARM Release Notes",GEN)
BOOK3="HLP\RVI.chm" ("RV Compiler Introduction",GEN)
BOOK4="Signum\Docs\SigUV3Arm.htm" ("Signum Systems JTAGjet Driver Documentation",GEN)
TDRV0=BIN\UL2ARM.DLL("ULINK ARM Debugger")
TDRV1=BIN\UL2CM3.DLL("ULINK Cortex Debugger")
TDRV2=BIN\AGDIRDI.DLL("RDI Interface Driver")
TDRV3=BIN\ABLSTCM.dll("Altera Blaster Cortex Debugger")
TDRV4=BIN\lmidk-agdi.dll("Stellaris ICDI")
TDRV5=Signum\SigUV3Arm.dll("Signum Systems JTAGjet")
TDRV6=Segger\JLTAgdi.dll("J-LINK / J-TRACE")
TDRV7=Segger\JL2CM3.dll("Cortex-M3 J-LINK")
TDRV8=STLink\ST-LINKIII-KEIL.dll ("ST-Link Debugger")
TDRV9=BIN\ULP2CM3.DLL("ULINK Pro Cortex Debugger")
TDRV10=BIN\ULP2ARM.DLL("ULINK Pro ARM Debugger")
LIC0=ATT9U-SR4AF-S9MG4-F9K4J-X1RVH-SJP83
我想大家一定发现问题了，就是在c51的编译器等目录下面没有他的目标路径而arm有，所以他肯定会提示工具不匹配之类的问题。
解决方法很简单，根据ARM的样子也写个路径就OK了，如上图所示修改添加部分。