Haskell 堆栈在构建时忽略 -Wall -Werror cabal ghc-options 标志

Question

我想在使用堆栈构建时始终使用“-Wall -Werror”选项（执行 stack build），但将这些标志添加到 [=29 中的 ghc-options =] 什么都不做。我还想避免将 --pedantic 标志传递给堆栈构建。这是配置文件：

package.yaml

...
executables:
  XYZ-exe:
    main:                Main.hs
    source-dirs:         app
    ghc-options:
    - -Wall
    - -Werror
    - -threaded
    - -rtsopts
    - -with-rtsopts=-N
    dependencies:
    - XYZ
...

XYZ.cabal

...
executable XYZ-exe
  main-is: Main.hs
  hs-source-dirs:
      app
  ghc-options: -Wall -Werror -threaded -rtsopts -with-rtsopts=-N
...

“-Wall -Werror”标志在 ghc-options 中指定，但在构建时好像被忽略了。这是 stack build:

的输出

stack build
Building all executables for `XYZ' once. After a successful build of all of 
them, only specified executables will be rebuilt.
XYZ-0.1.0.0: configure (lib + exe)
Configuring XYZ-0.1.0.0...
XYZ-0.1.0.0: build (lib + exe)
Preprocessing library for XYZ-0.1.0.0..
Building library for XYZ-0.1.0.0..
[  1 of 105] Compiling Data.List.Extras ( src\Data\List\Extras.hs, .stack- 
work\dist\e626a42b\build\Data\List\Extras.o )
... the rest is omitted, all succeed ...

这是 stack build --pedantic

的输出

stack build --pedantic
Building all executables for `HStat' once. After a successful build of all of them, only specified executables will be rebuilt.
HStat-0.1.0.0: configure (lib + exe)
Configuring HStat-0.1.0.0...
HStat-0.1.0.0: build (lib + exe)
Preprocessing library for HStat-0.1.0.0..
Building library for HStat-0.1.0.0..
[  1 of 105] Compiling Data.List.Extras ( src\Data\List\Extras.hs, .stack-work\dist\e626a42b\build\Data\List\Extras.o )

src\Data\List\Extras.hs:4:1: error: [-Wunused-imports, -Werror=unused-imports]
    The import of ‘Data.Maybe’ is redundant
      except perhaps to import instances from ‘Data.Maybe’
    To import instances alone, use: import Data.Maybe()
  |
4 | import           Data.Maybe
  | ^^^^^^^^^^^^^^^^^^^^^^^^^^^

这按预期工作 - src\Data\List\Extras.hs 确实有一个未使用的 Data.Maybe 导入。我做错了什么？

Answer 1

ghc-options 标志必须在 package.yaml:

的 library 部分单独定义

library:
  source-dirs: src
  ghc-options:
  - -Wall
  - -Werror
  - -fwarn-incomplete-uni-patterns

这样做解决了问题。

Haskell 堆栈在构建时忽略 -Wall -Werror cabal ghc-options 标志

Haskell stack ignores -Wall -Werror cabal ghc-options flags when building

haskell

ghc

cabal

haskell-stack