Question

我希望在使用堆栈进行构建时始终使用“ -Wall -Werror”选项（执行 stack build ），但是将这些标志添加到package.yaml中的ghc-options不会执行任何操作。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，但是在构建时被忽略。这是堆栈构建的输出：

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确实有未使用的Data。也许可以导入。我在做什么错了？

Answer 1

ghc-options标志必须在package.yaml的库部分中分别定义：

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

这样做可以解决问题。

在构建时，Haskell堆栈会忽略-Wall -Werror cabal ghc-options标志

1 个答案: