[yocto] toolchain from meta-mingw gets error x86_64-poky-linux-gcc: error: CreateProcess: No such file or directory

[Wang, Yang Y]

I'm using Yocto krogoth and meta-mingw to build the meta-toolchain for windows system. The build is quite smooth.
I extract the built toolchain poky-glibc-x86_64-meta-toolchain-core2-64-toolchain-2.1.tar.xz on windows to c:/yocto2.1
However when I try to run a simple build from windows cmd console after I set up the environment-setup-core2-64-poky-linux.bat, I got the following error.
By further check, it seems the error is related to the symbolic link in folder sysroots/x86_64-pokysdk-mingw32/usr/bin/x86_64-poky-linux/../../libexec/x86_64-poky-linux/gcc/x86_64-poky-linux/5.3.0/ where the as, ar etc binutiles are the symbolic link to the file in -> ../../../../../bin/x86_64-poky-linux/
However on windows, such "../../" symbolic link can't work. Simply execute the symbolic 'as.exe' will get error "Access is denied."

Anyone has the idea on how to solve this issue?

c:\Yocto2.1>%CC% c:/temp/temp/temp/test.c
x86_64-poky-linux-gcc: error: CreateProcess: No such file or directory

c:\Yocto2.1>%CC% c:/temp/temp/temp/test.c --verbose
Using built-in specs.
COLLECT_GCC=x86_64-poky-linux-gcc
COLLECT_LTO_WRAPPER=c:/yocto2.1/sysroots/x86_64-pokysdk-mingw32/usr/bin/x86_64-poky-linux/../../libexec/x86_64-poky-linux/gcc/x86_64-poky-linux/5.3.0/lto-wrapper.exe
Target: x86_64-poky-linux
....
GNU C11 (GCC) version 5.3.0 (x86_64-poky-linux)
        compiled by GNU C version 5.3.0, GMP version 6.1.0, MPFR version 3.1.3, MPC version 1.0.3
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
Compiler executable checksum: 4b6c2d45c1da5393637e027504b4f2dd
COLLECT_GCC_OPTIONS='--sysroot=c:\Yocto2.1\\sysroots\core2-64-poky-linux' '-m64' '-march=core2' '-mtune=core2' '-msse3' '-mfpmath=sse' '-v'
c:/yocto2.1/sysroots/x86_64-pokysdk-mingw32/usr/bin/x86_64-poky-linux/../../libexec/x86_64-poky-linux/gcc/x86_64-poky-linux/5.3.0/as.exe -v --64 -o C:\Users\ywang30\AppData\Local\Temp\ccREtk4o.o C:\Users\ywang30\AppData\Local\Temp\ccbqVhdf.s
x86_64-poky-linux-gcc: error: CreateProcess: No such file or directory


c:\Yocto2.1> c:/yocto2.1/sysroots/x86_64-pokysdk-mingw32/usr/bin/x86_64-poky-linux/../../libexec/x86_64-poky-linux/gcc/x86_64-poky-linux/5.3.0/as.exe
Access is denied.

c:\Yocto2.1>ls  c:/yocto2.1/sysroots/x86_64-pokysdk-mingw32/usr/bin/x86_64-poky-linux/../../libexec/x86_64-poky-linux/gcc/x86_64-poky-linux/5.3.0/ -l
total 67783
lrwxrwxrwx 1 ywang30 Domain Users       61 Aug 18 12:05 ar.exe -> ../../../../../bin/x86_64-poky-linux/x86_64-poky-linux-ar.exe
lrwxrwxrwx 1 ywang30 Domain Users       61 Aug 18 12:05 as.exe -> ../../../../../bin/x86_64-poky-linux/x86_64-poky-linux-as.exe
-rwxr-xr-x 1 ywang30 Domain Users 21761467 Aug 18 11:53 cc1.exe
-rwxr-xr-x 1 ywang30 Domain Users 22986939 Aug 18 11:53 cc1plus.exe
-rwxr-xr-x 1 ywang30 Domain Users  1658365 Aug 18 11:53 collect2.exe
lrwxrwxrwx 1 ywang30 Domain Users       62 Aug 18 12:05 cpp.exe -> ../../../../../bin/x86_64-poky-linux/x86_64-poky-linux-cpp.exe
lrwxrwxrwx 1 ywang30 Domain Users       62 Aug 18 12:05 gcc.exe -> ../../../../../bin/x86_64-poky-linux/x86_64-poky-linux-gcc.exe
lrwxrwxrwx 1 ywang30 Domain Users       61 Aug 18 12:05 ld.exe -> ../../../../../bin/x86_64-poky-linux/x86_64-poky-linux-ld.exe
-rwxr-xr-x 1 ywang30 Domain Users   129591 Aug 18 11:53 liblto_plugin-0.dll
-rw-r--r-- 1 ywang30 Domain Users    53040 Aug 18 11:53 liblto_plugin.dll.a
-rw-r--r-- 1 ywang30 Domain Users     1381 Aug 18 11:53 liblto_plugin.la
-rwxr-xr-x 1 ywang30 Domain Users  1881552 Aug 18 11:53 lto-wrapper.exe
-rwxr-xr-x 1 ywang30 Domain Users 20913549 Aug 18 11:53 lto1.exe
lrwxrwxrwx 1 ywang30 Domain Users       61 Aug 18 12:05 nm.exe -> ../../../../../bin/x86_64-poky-linux/x86_64-poky-linux-nm.exe
lrwxrwxrwx 1 ywang30 Domain Users       66 Aug 18 12:05 objcopy.exe -> ../../../../../bin/x86_64-poky-linux/x86_64-poky-linux-objcopy.exe
lrwxrwxrwx 1 ywang30 Domain Users       66 Aug 18 12:05 objdump.exe -> ../../../../../bin/x86_64-poky-linux/x86_64-poky-linux-objdump.exe
lrwxrwxrwx 1 ywang30 Domain Users       65 Aug 18 12:05 ranlib.exe -> ../../../../../bin/x86_64-poky-linux/x86_64-poky-linux-ranlib.exe
lrwxrwxrwx 1 ywang30 Domain Users       61 Aug 18 12:05 real-ld.exe -> ../../../../../bin/x86_64-poky-linux/x86_64-poky-linux-ld.exe
lrwxrwxrwx 1 ywang30 Domain Users       64 Aug 18 12:05 strip.exe -> ../../../../../bin/x86_64-poky-linux/x86_64-poky-linux-strip.exe
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