-v command line switch should show import sources

[schveiguy]

-v gives a list of imports and what files they are when parsing.

However, it doesn't tell you why the module was imported. Adding an additional field of the import source (and line number would be good too), might help diagnose unexpected import sources.

[MrcSnm]

import std.concurrency;
void main(){}

Built with ldc2 app.d --mtriple=wasm32-unknown-unknown

Shows the errors:

C:\D\ldc2\ldc2-1.39.0-windows-multilib\bin\..\import\core\stdc\time.d(34): Error: undefined identifier `time_t`, did you mean function `time`?
C:\D\ldc2\ldc2-1.39.0-windows-multilib\bin\..\import\core\stdc\time.d(34): Error: undefined identifier `time_t`, did you mean function `time`?
C:\D\ldc2\ldc2-1.39.0-windows-multilib\bin\..\import\core\stdc\time.d(37): Error: undefined identifier `time_t`, did you mean function `time`?
C:\D\ldc2\ldc2-1.39.0-windows-multilib\bin\..\import\core\stdc\time.d(37): Error: undefined identifier `tm`
C:\D\ldc2\ldc2-1.39.0-windows-multilib\bin\..\import\core\stdc\time.d(40): Error: undefined identifier `time_t`, did you mean function `time`?
C:\D\ldc2\ldc2-1.39.0-windows-multilib\bin\..\import\core\stdc\time.d(40): Error: undefined identifier `time_t`, did you mean function `time`?
C:\D\ldc2\ldc2-1.39.0-windows-multilib\bin\..\import\core\stdc\time.d(43): Error: undefined identifier `tm`
C:\D\ldc2\ldc2-1.39.0-windows-multilib\bin\..\import\core\stdc\time.d(46): Error: undefined identifier `time_t`, did you mean function `time`?
C:\D\ldc2\ldc2-1.39.0-windows-multilib\bin\..\import\core\stdc\time.d(49): Error: undefined identifier `tm`
C:\D\ldc2\ldc2-1.39.0-windows-multilib\bin\..\import\core\stdc\time.d(49): Error: undefined identifier `time_t`, did you mean function `time`?
C:\D\ldc2\ldc2-1.39.0-windows-multilib\bin\..\import\core\stdc\time.d(52): Error: undefined identifier `tm`
C:\D\ldc2\ldc2-1.39.0-windows-multilib\bin\..\import\core\stdc\time.d(52): Error: undefined identifier `time_t`, did you mean function `time`?
C:\D\ldc2\ldc2-1.39.0-windows-multilib\bin\..\import\core\stdc\time.d(54): Error: undefined identifier `tm`
C:\D\ldc2\ldc2-1.39.0-windows-multilib\bin\..\import\core\stdc\wchar_.d(142): Error: undefined identifier `wchar_t`, did you mean `dchar`?
C:\D\ldc2\ldc2-1.39.0-windows-multilib\bin\..\import\core\stdc\wchar_.d(186): Error: undefined identifier `FILE`
C:\D\ldc2\ldc2-1.39.0-windows-multilib\bin\..\import\core\stdc\wchar_.d(186): Error: undefined identifier `wchar_t`, did you mean `dchar`?
C:\D\ldc2\ldc2-1.39.0-windows-multilib\bin\..\import\core\stdc\wchar_.d(188): Error: undefined identifier `FILE`
C:\D\ldc2\ldc2-1.39.0-windows-multilib\bin\..\import\core\stdc\wchar_.d(188): Error: undefined identifier `wchar_t`, did you mean `dchar`?
C:\D\ldc2\ldc2-1.39.0-windows-multilib\bin\..\import\core\stdc\wchar_.d(190): Error: undefined identifier `wchar_t`, did you mean `dchar`?
C:\D\ldc2\ldc2-1.39.0-windows-multilib\bin\..\import\core\stdc\wchar_.d(190): Error: undefined identifier `wchar_t`, did you mean `dchar`?

Completely unrelated to the faulting import.

IMO, this should even be extended to default messages

[schveiguy]

try again with the -v switch as specified in the title.

[MrcSnm]

binary    C:\D\ldc2\ldc2-1.39.0-windows-multilib\bin\ldc2.exe
version   1.39.0 (DMD v2.109.1, LLVM 18.1.6)
config    C:\D\ldc2\ldc2-1.39.0-windows-multilib\etc\ldc2.conf (wasm32-unknown-unknown)
predefs   LDC all D_Version2 assert D_PreConditions D_PostConditions D_Invariants D_ModuleInfo D_Exceptions D_TypeInfo WebAssembly LittleEndian FreeStanding LDC_LLVM_1801
parse     app
importall app
import    object        (C:\D\ldc2\ldc2-1.39.0-windows-multilib\bin\..\import\object.d)
import    core.internal.hash    (C:\D\ldc2\ldc2-1.39.0-windows-multilib\bin\..\import\core\internal\hash.d)
import    core.internal.traits  (C:\D\ldc2\ldc2-1.39.0-windows-multilib\bin\..\import\core\internal\traits.d)
import    core.internal.entrypoint      (C:\D\ldc2\ldc2-1.39.0-windows-multilib\bin\..\import\core\internal\entrypoint.d)
import    core.internal.array.appending (C:\D\ldc2\ldc2-1.39.0-windows-multilib\bin\..\import\core\internal\array\appending.d)
import    core.internal.array.comparison        (C:\D\ldc2\ldc2-1.39.0-windows-multilib\bin\..\import\core\internal\array\comparison.d)
import    core.internal.array.equality  (C:\D\ldc2\ldc2-1.39.0-windows-multilib\bin\..\import\core\internal\array\equality.d)
import    core.internal.array.casting   (C:\D\ldc2\ldc2-1.39.0-windows-multilib\bin\..\import\core\internal\array\casting.d)
import    core.internal.array.concatenation     (C:\D\ldc2\ldc2-1.39.0-windows-multilib\bin\..\import\core\internal\array\concatenation.d)
import    core.internal.array.construction      (C:\D\ldc2\ldc2-1.39.0-windows-multilib\bin\..\import\core\internal\array\construction.d)
import    core.internal.array.arrayassign       (C:\D\ldc2\ldc2-1.39.0-windows-multilib\bin\..\import\core\internal\array\arrayassign.d)
import    core.internal.array.capacity  (C:\D\ldc2\ldc2-1.39.0-windows-multilib\bin\..\import\core\internal\array\capacity.d)
import    core.internal.dassert (C:\D\ldc2\ldc2-1.39.0-windows-multilib\bin\..\import\core\internal\dassert.d)
import    core.internal.destruction     (C:\D\ldc2\ldc2-1.39.0-windows-multilib\bin\..\import\core\internal\destruction.d)
import    core.internal.moving  (C:\D\ldc2\ldc2-1.39.0-windows-multilib\bin\..\import\core\internal\moving.d)
import    core.internal.postblit        (C:\D\ldc2\ldc2-1.39.0-windows-multilib\bin\..\import\core\internal\postblit.d)
import    core.internal.switch_ (C:\D\ldc2\ldc2-1.39.0-windows-multilib\bin\..\import\core\internal\switch_.d)
import    core.lifetime (C:\D\ldc2\ldc2-1.39.0-windows-multilib\bin\..\import\core\lifetime.d)
import    core.internal.attributes      (C:\D\ldc2\ldc2-1.39.0-windows-multilib\bin\..\import\core\internal\attributes.d)
import    core.builtins (C:\D\ldc2\ldc2-1.39.0-windows-multilib\bin\..\import\core\builtins.d)
import    ldc.intrinsics        (C:\D\ldc2\ldc2-1.39.0-windows-multilib\bin\..\import\ldc\intrinsics.di)
import    std.concurrency       (C:\D\ldc2\ldc2-1.39.0-windows-multilib\bin\..\import\std\concurrency.d)
import    std.range.interfaces  (C:\D\ldc2\ldc2-1.39.0-windows-multilib\bin\..\import\std\range\interfaces.d)
import    std.meta      (C:\D\ldc2\ldc2-1.39.0-windows-multilib\bin\..\import\std\meta.d)
import    std.traits    (C:\D\ldc2\ldc2-1.39.0-windows-multilib\bin\..\import\std\traits.d)
import    std.range.primitives  (C:\D\ldc2\ldc2-1.39.0-windows-multilib\bin\..\import\std\range\primitives.d)
import    std.variant   (C:\D\ldc2\ldc2-1.39.0-windows-multilib\bin\..\import\std\variant.d)
import    std.typecons  (C:\D\ldc2\ldc2-1.39.0-windows-multilib\bin\..\import\std\typecons.d)
import    std.format.spec       (C:\D\ldc2\ldc2-1.39.0-windows-multilib\bin\..\import\std\format\spec.d)
import    std.format.write      (C:\D\ldc2\ldc2-1.39.0-windows-multilib\bin\..\import\std\format\write.d)
import    std.format.internal.write     (C:\D\ldc2\ldc2-1.39.0-windows-multilib\bin\..\import\std\format\internal\write.d)
import    std.internal.attributes       (C:\D\ldc2\ldc2-1.39.0-windows-multilib\bin\..\import\std\internal\attributes.d)
import    core.atomic   (C:\D\ldc2\ldc2-1.39.0-windows-multilib\bin\..\import\core\atomic.d)
import    core.internal.atomic  (C:\D\ldc2\ldc2-1.39.0-windows-multilib\bin\..\import\core\internal\atomic.d)
import    core.sync.condition   (C:\D\ldc2\ldc2-1.39.0-windows-multilib\bin\..\import\core\sync\condition.d)
import    core.exception        (C:\D\ldc2\ldc2-1.39.0-windows-multilib\bin\..\import\core\exception.d)
import    core.sync.exception   (C:\D\ldc2\ldc2-1.39.0-windows-multilib\bin\..\import\core\sync\exception.d)
import    core.sync.mutex       (C:\D\ldc2\ldc2-1.39.0-windows-multilib\bin\..\import\core\sync\mutex.d)
import    core.time     (C:\D\ldc2\ldc2-1.39.0-windows-multilib\bin\..\import\core\time.d)
import    core.stdc.time        (C:\D\ldc2\ldc2-1.39.0-windows-multilib\bin\..\import\core\stdc\time.d)
import    core.stdc.config      (C:\D\ldc2\ldc2-1.39.0-windows-multilib\bin\..\import\core\stdc\config.d)
import    core.stdc.stdio       (C:\D\ldc2\ldc2-1.39.0-windows-multilib\bin\..\import\core\stdc\stdio.d)
import    core.stdc.stdint      (C:\D\ldc2\ldc2-1.39.0-windows-multilib\bin\..\import\core\stdc\stdint.d)
import    core.stdc.stddef      (C:\D\ldc2\ldc2-1.39.0-windows-multilib\bin\..\import\core\stdc\stddef.d)
import    core.stdc.signal      (C:\D\ldc2\ldc2-1.39.0-windows-multilib\bin\..\import\core\stdc\signal.d)
import    core.stdc.wchar_      (C:\D\ldc2\ldc2-1.39.0-windows-multilib\bin\..\import\core\stdc\wchar_.d)
import    core.stdc.stdarg      (C:\D\ldc2\ldc2-1.39.0-windows-multilib\bin\..\import\core\stdc\stdarg.d)
import    core.internal.string  (C:\D\ldc2\ldc2-1.39.0-windows-multilib\bin\..\import\core\internal\string.d)
import    core.thread   (C:\D\ldc2\ldc2-1.39.0-windows-multilib\bin\..\import\core\thread\package.d)
import    core.thread.fiber     (C:\D\ldc2\ldc2-1.39.0-windows-multilib\bin\..\import\core\thread\fiber.d)
import    core.memory   (C:\D\ldc2\ldc2-1.39.0-windows-multilib\bin\..\import\core\memory.d)
import    core.stdc.errno       (C:\D\ldc2\ldc2-1.39.0-windows-multilib\bin\..\import\core\stdc\errno.d)
import    core.stdc.stdlib      (C:\D\ldc2\ldc2-1.39.0-windows-multilib\bin\..\import\core\stdc\stdlib.d)
import    core.thread.threadbase        (C:\D\ldc2\ldc2-1.39.0-windows-multilib\bin\..\import\core\thread\threadbase.d)
import    core.thread.context   (C:\D\ldc2\ldc2-1.39.0-windows-multilib\bin\..\import\core\thread\context.d)
import    core.thread.types     (C:\D\ldc2\ldc2-1.39.0-windows-multilib\bin\..\import\core\thread\types.d)
import    core.thread.threadgroup       (C:\D\ldc2\ldc2-1.39.0-windows-multilib\bin\..\import\core\thread\threadgroup.d)
import    core.thread.osthread  (C:\D\ldc2\ldc2-1.39.0-windows-multilib\bin\..\import\core\thread\osthread.d)
import    ldc.attributes        (C:\D\ldc2\ldc2-1.39.0-windows-multilib\bin\..\import\ldc\attributes.d)
import    ldc.llvmasm   (C:\D\ldc2\ldc2-1.39.0-windows-multilib\bin\..\import\ldc\llvmasm.di)
semantic  app
C:\D\ldc2\ldc2-1.39.0-windows-multilib\bin\..\import\core\stdc\time.d(34): Error: undefined identifier `time_t`, did you mean function `time`?
C:\D\ldc2\ldc2-1.39.0-windows-multilib\bin\..\import\core\stdc\time.d(34): Error: undefined identifier `time_t`, did you mean function `time`?
C:\D\ldc2\ldc2-1.39.0-windows-multilib\bin\..\import\core\stdc\time.d(37): Error: undefined identifier `time_t`, did you mean function `time`?
C:\D\ldc2\ldc2-1.39.0-windows-multilib\bin\..\import\core\stdc\time.d(37): Error: undefined identifier `tm`
C:\D\ldc2\ldc2-1.39.0-windows-multilib\bin\..\import\core\stdc\time.d(40): Error: undefined identifier `time_t`, did you mean function `time`?
C:\D\ldc2\ldc2-1.39.0-windows-multilib\bin\..\import\core\stdc\time.d(40): Error: undefined identifier `time_t`, did you mean function `time`?
C:\D\ldc2\ldc2-1.39.0-windows-multilib\bin\..\import\core\stdc\time.d(43): Error: undefined identifier `tm`
C:\D\ldc2\ldc2-1.39.0-windows-multilib\bin\..\import\core\stdc\time.d(46): Error: undefined identifier `time_t`, did you mean function `time`?
C:\D\ldc2\ldc2-1.39.0-windows-multilib\bin\..\import\core\stdc\time.d(49): Error: undefined identifier `tm`
C:\D\ldc2\ldc2-1.39.0-windows-multilib\bin\..\import\core\stdc\time.d(49): Error: undefined identifier `time_t`, did you mean function `time`?
C:\D\ldc2\ldc2-1.39.0-windows-multilib\bin\..\import\core\stdc\time.d(52): Error: undefined identifier `tm`
C:\D\ldc2\ldc2-1.39.0-windows-multilib\bin\..\import\core\stdc\time.d(52): Error: undefined identifier `time_t`, did you mean function `time`?
C:\D\ldc2\ldc2-1.39.0-windows-multilib\bin\..\import\core\stdc\time.d(54): Error: undefined identifier `tm`
C:\D\ldc2\ldc2-1.39.0-windows-multilib\bin\..\import\core\stdc\wchar_.d(142): Error: undefined identifier `wchar_t`, did you mean `dchar`?
C:\D\ldc2\ldc2-1.39.0-windows-multilib\bin\..\import\core\stdc\wchar_.d(186): Error: undefined identifier `FILE`
C:\D\ldc2\ldc2-1.39.0-windows-multilib\bin\..\import\core\stdc\wchar_.d(186): Error: undefined identifier `wchar_t`, did you mean `dchar`?
C:\D\ldc2\ldc2-1.39.0-windows-multilib\bin\..\import\core\stdc\wchar_.d(188): Error: undefined identifier `FILE`
C:\D\ldc2\ldc2-1.39.0-windows-multilib\bin\..\import\core\stdc\wchar_.d(188): Error: undefined identifier `wchar_t`, did you mean `dchar`?
C:\D\ldc2\ldc2-1.39.0-windows-multilib\bin\..\import\core\stdc\wchar_.d(190): Error: undefined identifier `wchar_t`, did you mean `dchar`?
C:\D\ldc2\ldc2-1.39.0-windows-multilib\bin\..\import\core\stdc\wchar_.d(190): Error: undefined identifier `wchar_t`, did you mean `dchar`?

[schveiguy]

So if this enhancement were implemented, you'd see that core.time was imported by core.sync.condition, and that core.sync.condition was imported by std.concurrency. It would be easy to trace the path.