build_executable fails if snoopfile and builddir are on different drives

[PGS62]

I'm experimenting with build_executable. I see that this works correctly:

julia> build_executable("d:/philip/source/script/julia/jsource/hello.jl", "hello", 
builddir = "d:/temp/builddir",snoopfile = "d:/philip/source/script/julia/jsource/snoop.jl")
Julia program file:
  "d:\philip\source\script\julia\jsource\hello.jl"
C program file:
  "C:\Users\Philip\.julia\packages\PackageCompiler\CJQcs\examples\program.c"
Build directory:
  "d:\temp\builddir"
The snoop file is being executed!
[ Info: used 12 out of 12 precompile statements
All done

but if I instead use a builddir on the c: drive, I get an error because of a failed attempt to open a file at c:\d:\philip\source\script\julia\jsource\hello.jl. Is there perhaps an error in the logic to determine the "fully qualified location" of julia_program?

julia> build_executable("d:/philip/source/script/julia/jsource/hello.jl", "hello",
 builddir = "c:/temp/builddir",snoopfile = "d:/philip/source/script/julia/jsource/snoop.jl")
Julia program file:
  "d:\philip\source\script\julia\jsource\hello.jl"
C program file:
  "C:\Users\Philip\.julia\packages\PackageCompiler\CJQcs\examples\program.c"
Build directory:
  "c:\temp\builddir"
The snoop file is being executed!
[ Info: used 12 out of 12 precompile statements
ERROR: LoadError: LoadError: could not open file c:\d:\philip\source\script\julia\jsource\hello.jl
Stacktrace:
 [1] include at .\boot.jl:328 [inlined]
 [2] include_relative(::Module, ::String) at .\loading.jl:1094
 [3] include(::Module, ::String) at .\Base.jl:31
 [4] top-level scope at c:\temp\builddir\julia_main.jl:1
 [5] include at .\boot.jl:328 [inlined]
 [6] include_relative(::Module, ::String) at .\loading.jl:1094
 [7] include at .\Base.jl:31 [inlined]
 [8] include(::String) at C:\Users\Philip\.julia\packages\PackageCompiler\CJQcs\sysimg\run_julia_code.jl:8
 [9] top-level scope at C:\Users\Philip\.julia\packages\PackageCompiler\CJQcs\sysimg\run_julia_code.jl:10
 [10] include at .\boot.jl:328 [inlined]
 [11] include_relative(::Module, ::String) at .\loading.jl:1094
 [12] include(::Module, ::String) at .\Base.jl:31
 [13] exec_options(::Base.JLOptions) at .\client.jl:295
 [14] _start() at .\client.jl:464
in expression starting at c:\temp\builddir\julia_main.jl:1
in expression starting at C:\Users\Philip\.julia\packages\PackageCompiler\CJQcs\sysimg\run_julia_code.jl:10
ERROR: failed process: Process(`'C:\Users\philip\AppData\Local\Julia-1.2.0\bin\julia.exe' --output-o=hello.a --track-allocation=none --code-coverage=none --history-file=yes --inline=yes --math-mode=ieee '--project=C:\Users\Philip\.julia\environments\v1.2' --compile=yes --track-allocation=none --sysimage-native-code=yes '--sysimage=C:\Users\philip\AppData\Local\Julia-1.2.0\lib\julia\sys.dll' --compiled-modules=yes --optimize=2 'C:\Users\Philip\.julia\packages\PackageCompiler\CJQcs\sysimg\run_julia_code.jl'`, ProcessExited(1)) [1]

Stacktrace:
 [1] pipeline_error at .\process.jl:813 [inlined]
 [2] #run#536(::Bool, ::typeof(run), ::Cmd) at .\process.jl:728
 [3] run at .\process.jl:726 [inlined]
 [4] #run_julia#1 at C:\Users\Philip\.julia\packages\PackageCompiler\CJQcs\src\compiler_flags.jl:225 [inlined]
 [5] #run_julia at .\none:0 [inlined]
 [6] (::getfield(PackageCompiler, Symbol("##13#14")){Base.Iterators.Pairs{Symbol,Nothing,NTuple{14,Symbol},NamedTuple{(:sysimage, :startup_file, :handle_signals, :sysimage_native_code, :compiled_modules, :depwarn, :warn_overwrite, :compile, :cpu_target, :optimize, :debug_level, :inline, :check_bounds, :math_mode),NTuple{14,Nothing}}},String})() at C:\Users\Philip\.julia\packages\PackageCompiler\CJQcs\src\static_julia.jl:263
 [7] cd(::getfield(PackageCompiler, Symbol("##13#14")){Base.Iterators.Pairs{Symbol,Nothing,NTuple{14,Symbol},NamedTuple{(:sysimage, :startup_file, :handle_signals, :sysimage_native_code, :compiled_modules, :depwarn, :warn_overwrite, :compile, :cpu_target, :optimize, :debug_level, :inline, :check_bounds, :math_mode),NTuple{14,Nothing}}},String}, ::String) at .\file.jl:85
 [8] #build_object#12(::Base.Iterators.Pairs{Symbol,Nothing,NTuple{14,Symbol},NamedTuple{(:sysimage, :startup_file, :handle_signals, :sysimage_native_code, :compiled_modules, :depwarn, :warn_overwrite, :compile, :cpu_target, :optimize, :debug_level, :inline, :check_bounds, :math_mode),NTuple{14,Nothing}}}, ::typeof(PackageCompiler.build_object), ::String, ::String, ::String, ::Bool) at C:\Users\Philip\.julia\packages\PackageCompiler\CJQcs\src\static_julia.jl:262
 [9] #build_object at .\none:0 [inlined]
 [10] build_object(::String, ::String, ::String, ::Bool, ::Nothing, ::Nothing, ::Nothing, ::Nothing, ::Nothing, ::Nothing, ::Nothing, ::Nothing, ::Nothing, ::Nothing, ::Nothing, ::Nothing, ::Nothing, ::Nothing, ::Nothing) at C:\Users\Philip\.julia\packages\PackageCompiler\CJQcs\src\static_julia.jl:241
 [11] #static_julia#5(::Nothing, ::Bool, ::Bool, ::String, ::String, ::String, ::Bool, ::Bool, ::Bool, ::Bool, ::Bool, ::Bool, ::Bool, ::Bool, ::Nothing, ::Bool, ::Bool, ::Nothing, ::Nothing, ::Nothing, ::Nothing, ::Nothing, ::Nothing, ::Nothing, ::Nothing, ::Nothing, ::Nothing, ::Nothing, ::Nothing, ::Nothing, ::Nothing, ::Nothing, ::Nothing, ::Nothing, ::typeof(static_julia), ::String) at C:\Users\Philip\.julia\packages\PackageCompiler\CJQcs\src\static_julia.jl:162
 [12] #build_executable at .\none:0 [inlined] (repeats 2 times)
 [13] top-level scope at REPL[35]:1

julia> versioninfo()
Julia Version 1.2.0
Commit c6da87ff4b (2019-08-20 00:03 UTC)
Platform Info:
  OS: Windows (x86_64-w64-mingw32)
  CPU: Intel(R) Core(TM) i7-6700 CPU @ 3.40GHz
  WORD_SIZE: 64
  LIBM: libopenlibm
  LLVM: libLLVM-6.0.1 (ORCJIT, skylake)
Environment:
  JULIA_NUM_THREADS = 8
  JULIA_EDITOR = "C:\Users\Philip\AppData\Local\Programs\Microsoft VS Code\Code.exe"

[KristofferC]

I think this should be fixed, please comment/open a new issue if that is not the case.