Macro for linking Julia fcn to @ccall of C fcn, given names and arg types

General Usage
,
2

I think you don’t need to eval(jlType) and instead push!(cArgTypesList(esc(jlType))). The eval just gets you an early resolution of the type name to the actual type, so you then proceed putting that type into the AST directly which is not necessary.

For 2, macro usage always generates these LineNumberNodes:

julia> Meta.@dump @macro arg
Expr
  head: Symbol macrocall
  args: Array{Any}((3,))
    1: Symbol @macro
    2: LineNumberNode
      line: Int64 1
      file: Symbol REPL[15]
    3: Symbol arg

So if you want to construct the macrocall manually, you can make a LineNumberNode yourself:

macro showmacro(x)
    Expr(:macrocall, Symbol("@show"), :(LineNumberNode(@__LINE__, @__FILE__)), x)
end

@showmacro sin(3)
# sin(3) = 0.1411200080598672