lean4-htt/src/Lean/Compiler/FFI.lean
Mac Malone 0d529e18a6
feat: expose flags for the bundled C compiler (#4477)
Expose the C compiler and linker flags used with the bundled compiler
(clang) to Lean code. This is needed to skip the use of `leanc` in Lake.
2024-06-22 01:23:33 +00:00

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/-
Copyright (c) 2021 Sebastian Ullrich. All rights reserved.
Released under Apache 2.0 license as described in the file LICENSE.
Authors: Sebastian Ullrich
-/
prelude
import Init.Data.Array.Basic
import Init.System.FilePath
open System
namespace Lean.Compiler.FFI
@[extern "lean_get_leanc_extra_flags"]
private opaque getLeancExtraFlags : Unit → String
/-- Return C compiler flags for including Lean's headers. -/
def getCFlags (leanSysroot : FilePath) : Array String :=
#["-I", (leanSysroot / "include").toString] ++ (getLeancExtraFlags ()).trim.splitOn
@[extern "lean_get_leanc_internal_flags"]
private opaque getLeancInternalFlags : Unit → String
/-- Return C compiler flags needed to use the C compiler bundled with the Lean toolchain. -/
def getInternalCFlags (leanSysroot : FilePath) : Array String :=
(getLeancInternalFlags ()).trim.splitOn.toArray.map (·.replace "ROOT" leanSysroot.toString)
@[extern "lean_get_linker_flags"]
private opaque getBuiltinLinkerFlags (linkStatic : Bool) : String
/-- Return linker flags for linking against Lean's libraries. -/
def getLinkerFlags (leanSysroot : FilePath) (linkStatic := true) : Array String :=
#["-L", (leanSysroot / "lib" / "lean").toString] ++ (getBuiltinLinkerFlags linkStatic).trim.splitOn
@[extern "lean_get_internal_linker_flags"]
private opaque getBuiltinInternalLinkerFlags : Unit → String
/-- Return linker flags needed to use the linker bundled with the Lean toolchain. -/
def getInternalLinkerFlags (leanSysroot : FilePath) : Array String :=
(getBuiltinInternalLinkerFlags ()).trim.splitOn.toArray.map (·.replace "ROOT" leanSysroot.toString)
end Lean.Compiler.FFI