Build fails with ERROR: LoadError: UndefVarError: C_FILE not defined

NOTE: This repository is mainly for purposes of experimentation and no longer expected to be used going forward. `juliac.jl` has been merged into PackageCompiler.jl. Please install that package to use `juliac.jl`.

Static Julia Compiler

Building shared libraries and executables from Julia code.

Run juliac.jl -h for help:

usage: juliac.jl [-v] [-q] [-c] [-J <file>]
                 [--compile {yes|no|all|min}] [-C <target>]
                 [-O {0,1,2,3}] [-g {0,1,2}] [--inline {yes|no}]
                 [--check-bounds {yes|no}] [--math-mode {ieee,fast}]
                 [--depwarn {yes|no|error}] [-a] [-o] [-s] [-e] [-j]
                 [--version] [-h] juliaprog [cprog] [builddir]

Static Julia Compiler

positional arguments:
  juliaprog             Julia program to compile
  cprog                 C program to compile (required only when
                        building an executable; if not provided a
                        minimal standard program is used)
  builddir              build directory, either absolute or relative
                        to the Julia program directory (default:
                        "builddir")

optional arguments:
  -v, --verbose         increase verbosity
  -q, --quiet           suppress non-error messages
  -c, --clean           delete builddir
  -J, --sysimage <file>
                        start up with the given system image file
  --compile {yes|no|all|min}
                        enable or disable JIT compiler, or request
                        exhaustive compilation
  -C, --cpu-target <target>
                        limit usage of CPU features up to <target>
  -O, --optimize {0,1,2,3}
                        set optimization level (type: Int64)
  -g {0,1,2}            set debugging information level (type: Int64)
  --inline {yes|no}     control whether inlining is permitted
  --check-bounds {yes|no}
                        emit bounds checks always or never
  --math-mode {ieee,fast}
                        set floating point optimizations
  --depwarn {yes|no|error}
                        set syntax and method deprecation warnings
  -a, --autodeps        automatically build required dependencies
  -o, --object          build object file
  -s, --shared          build shared library
  -e, --executable      build executable file
  -j, --julialibs       sync Julia libraries to builddir
  --version             show version information and exit
  -h, --help            show this help message and exit

examples:
  juliac.jl -vae hello.jl        # verbose, build executable and deps
  juliac.jl -vae hello.jl prog.c # embed into user defined C program
  juliac.jl -qo hello.jl         # quiet, build object file only
  juliac.jl -vosej hello.jl      # build all and sync Julia libs

Notes

The juliac.jl script uses the ArgParse package, make sure it is installed.
On Windows install Cygwin and the mingw64-x86_64-gcc-core package, see:
https://github.com/JuliaLang/julia/blob/master/README.windows.md
A shared library containing the system image libhello.so, and a driver binary hello are created in the builddir directory. Running hello produces the following output:

   $ ./hello
   hello, world
   f() = -0.37549581296986956
       ┌─────────────────────────────────────────────────┐
   100 │⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢀⠎│
       │⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⡰⠁⠀│
       │⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⣠⠊⠀⠀⠀│
       │⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢀⠔⠁⠀⠀⠀⠀│
       │⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢀⠔⠁⠀⠀⠀⠀⠀⠀│
       │⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⡠⠊⠀⠀⠀⠀⠀⠀⠀⠀│
       │⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⡠⠊⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀│
       │⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⡠⠊⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀│
       │⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢀⠤⠊⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀│
       │⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⣀⠔⠁⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀│
       │⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢀⠤⠊⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀│
       │⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⣀⠤⠒⠁⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀│
       │⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⢀⡠⠔⠊⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀│
       │⠀⠀⠀⠀⠀⠀⢀⣀⠤⠔⠊⠁⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀│
     0 │⣀⠤⠤⠔⠒⠉⠁⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀⠀│
       └─────────────────────────────────────────────────┘
       1                                       10

Under the hood

The juliac.jl script uses the --output-o switch to compile the user script into object code, and then builds it into the system image specified by the -J switch. This prepares an object file, which is then linked into a shared library containing the system image and user code. A driver script such as the one in program.c can then be used to build a binary that runs the julia code.

Instead of a driver script, the generated system image can be embedded into a larger program following the embedding examples and relevant sections in the Julia manual. Note that the name of the generated system image ("libhello" for hello.jl) is accessible from C in the preprocessor macro JULIAC_PROGRAM_LIBNAME.

With Julia 0.7, a single large binary can be created, which does not require the driver program to load the shared library. An example of that is in program2.c, where the image file is the binary itself.

For more information on static Julia compilation see:
https://juliacomputing.com/blog/2016/02/09/static-julia.html

For more information on embedding Julia see:
https://github.com/JuliaLang/julia/blob/master/doc/src/manual/embedding.md

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NOTE: This repository is mainly for purposes of experimentation and no longer expected to be used going forward. juliac.jl has been merged into PackageCompiler.jl. Please install that package to use juliac.jl.

Static Julia Compiler

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NOTE: This repository is mainly for purposes of experimentation and no longer expected to be used going forward. `juliac.jl` has been merged into PackageCompiler.jl. Please install that package to use `juliac.jl`.