Exportc with const name in templates: "undeclared identifier"

[mratsim]

While trying to find a workaround to #9365, I find out that exportc doesn't find const variable in a template:

var i {.compileTime.} = 0

proc genSuffix(): static int =
  result = i
  inc i

template foo() = # Works if proc
  const
    suffix = genSuffix()
    ompsize_Csym = "ompsize_" & $suffix
  static:
    echo ompsize_Csym

  let ompsize {.exportc: ompsize_Csym.} = 100 # Fails
  # let ompsize = 100 # works
  # let ompsize {.exportc: "ompsize_" & $genSuffix().} = 100 # works
  echo ompsize

foo()
foo()

Error: undeclared identifier: 'ompsize_Csym'

[LemonBoy]

The template renaming pass does not affect the content of the pragmas so ompsize_Csym is indeed undeclared where foo is instantiated.