61 lines
2.4 KiB
Text
61 lines
2.4 KiB
Text
import Lean.Compiler.FFI
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open Lean.Compiler.FFI
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def main (args : List String) : IO UInt32 := do
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if args.isEmpty then
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IO.println "Lean C compiler
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A simple wrapper around a C compiler. Defaults to `@LEANC_CC@`,
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which can be overridden with the environment variable `LEAN_CC`. All parameters are passed
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as-is to the wrapped compiler.
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Interesting options:
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* `--print-cflags`: print C compiler flags necessary for building against the Lean runtime and exit
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* `--print-ldflags`: print C compiler flags necessary for statically linking against the Lean library and exit"
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return 1
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let root ← match (← IO.getEnv "LEAN_SYSROOT") with
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| some root => pure <| System.FilePath.mk root
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| none => pure <| (← IO.appDir).parent.get!
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let rootify s := s.replace "ROOT" root.toString
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-- It is difficult to identify the correct minor version here, leading to linking warnings like:
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-- `ld64.lld: warning: /usr/lib/system/libsystem_kernel.dylib has version 13.5.0, which is newer than target minimum of 13.0.0`
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-- In order to suppress these we set the MACOSX_DEPLOYMENT_TARGET variable into the far future.
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let env := match (← IO.getEnv "MACOSX_DEPLOYMENT_TARGET") with
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| some _ => #[]
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| none => #[("MACOSX_DEPLOYMENT_TARGET", "99.0")]
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-- let compileOnly := args.contains "-c"
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let linkStatic := !args.contains "-shared"
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-- We assume that the CMake variables do not contain escaped spaces
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let cflags := getCFlags root
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let mut cflagsInternal := "@LEANC_INTERNAL_FLAGS@".trim.splitOn
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let mut ldflagsInternal := "@LEANC_INTERNAL_LINKER_FLAGS@".trim.splitOn
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let ldflags := getLinkerFlags root linkStatic
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for arg in args do
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match arg with
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| "--print-cflags" =>
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IO.println <| " ".intercalate (cflags.map rootify |>.toList)
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return 0
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| "--print-ldflags" =>
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IO.println <| " ".intercalate ((cflags ++ ldflags).map rootify |>.toList)
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return 0
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| _ => pure ()
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let mut cc := "@LEANC_CC@"
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if let some cc' ← IO.getEnv "LEAN_CC" then
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cc := cc'
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-- these are intended for the bundled compiler only
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cflagsInternal := []
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ldflagsInternal := []
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cc := rootify cc
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let args := cflags ++ cflagsInternal ++ args ++ ldflagsInternal ++ ldflags ++ ["-Wno-unused-command-line-argument"]
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let args := args.filter (!·.isEmpty) |>.map rootify
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if args.contains "-v" then
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IO.eprintln s!"{cc} {" ".intercalate args.toList}"
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let child ← IO.Process.spawn { cmd := cc, args, env }
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child.wait
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