xexecvp

[Pascal Bellard]

Hello,

Code shrink using xexecvp (~250 bytes)

defconfig case :
   text    data     bss     dec     hex filename
 715588    2077    9064  726729   b16c9 busybox_old
 715329    2077    9064  726470   b15c6 busybox_unstripped

-pascal
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