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f5a0cbf108
(__gnat_portable_spawn): Fix cast of spawnvp third parameter to avoid warnings. Add also a cast to kill another warning. (win32_no_block_spawn): Initialize CreateProcess's dwCreationFlags parameter with the priority class of the parent process instead of always using the NORMAL_PRIORITY_CLASS. (__gnat_dup): New function. (__gnat_dup2): New function. (__gnat_is_symbolic_link): Enable the effective body of this function when __APPLE__ is defined. * g-os_lib.ads, g-os_lib.adb (Spawn): Two new procedures. Update comments. From-SVN: r90899
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