haskell - 运行 Haskell 代码时的架构 x86_64，Haskell OSX iconv

Question

当我在我的计算机上编译一个工作的 Haskell 代码时，它抛出了 x86_64 架构的这个错误。它在我 friend 的具有相同架构的计算机上运行良好。

  $ ghc --make BoardMain.hs
    Linking BoardMain ...
    Undefined symbols for architecture x86_64:
      "_iconv", referenced from:
          _hs_iconv in libHSbase-4.9.1.0.a(iconv.o)
         (maybe you meant: _hs_iconv, _base_GHCziIOziEncodingziIconv_iconvEncoding5_closure , _base_GHCziIOziEncodingziIconv_iconvEncodingzuloc_info , _base_GHCziIOziEncodingziIconv_iconvEncoding9_info , _hs_iconv_open , _base_GHCziIOziEncodingziIconv_iconvEncoding10_closure , _base_GHCziIOziEncodingziIconv_iconvEncoding11_info , _base_GHCziIOziEncodingziIconv_iconvEncoding7_closure , _base_GHCziIOziEncodingziIconv_iconvEncoding8_info , _base_GHCziIOziEncodingziIconv_iconvEncoding11_closure , _base_GHCziIOziEncodingziIconv_iconvEncoding8_closure , _base_GHCziIOziEncodingziIconv_iconvEncodingzuloc_closure , _hs_iconv_close , _base_GHCziIOziEncodingziIconv_iconvEncoding4_closure , _base_GHCziIOziEncodingziIconv_iconvEncoding10_info , _base_GHCziIOziEncodingziIconv_iconvEncoding3_closure , _base_GHCziIOziEncodingziIconv_iconvEncoding9_closure , _base_GHCziIOziEncodingziIconv_iconvEncoding2_closure , _base_GHCziIOziEncodingziIconv_iconvEncodingzuloc1_info , _base_GHCziIOziEncodingziIconv_iconvEncoding7_info , _base_GHCziIOziEncodingziIconv_iconvEncoding2_info , _base_GHCziIOziEncodingziIconv_iconvEncoding4_info , _base_GHCziIOziEncodingziIconv_iconvEncodingzuloc1_closure )
      "_iconv_close", referenced from:
          _hs_iconv_close in libHSbase-4.9.1.0.a(iconv.o)
         (maybe you meant: _hs_iconv_close)
      "_iconv_open", referenced from:
          _hs_iconv_open in libHSbase-4.9.1.0.a(iconv.o)
         (maybe you meant: _hs_iconv_open)
      "_locale_charset", referenced from:
          _localeEncoding in libHSbase-4.9.1.0.a(PrelIOUtils.o)
    ld: symbol(s) not found for architecture x86_64
    clang: error: linker command failed with exit code 1 (use -v to see invocation)
    `gcc' failed in phase `Linker'. (Exit code: 1)

Answer 1

错误不是由于架构造成的。错误是因为另一个可能与 MacPorts 一起安装的 libiconv 位于

/opt/local/lib as /opt/local/lib/libiconv.*

在编译代码时，它指的是 Macports libiconv，它与 OS X libiconv 有某种不同。我们需要机器使用 OS X libiconv 以确保它使用 OS X libconv

/usr/lib as /usr/lib/libiconv.*

我们需要将额外的库方向命令传递给 cabal 或 ghc .. 同时通过添加 -L/usr/lib 即，

ghc -L/usr/lib --make file.hs
cabal exec -- ghc -L/usr/lib --make BoardMain.hs

您甚至可以尝试添加
额外的库目录:
-/usr/lib
到我们的 stack.yaml。引用 this有关这方面的更多信息。

或者通过在/opt/local/lib 停用 libconv 如果您确定它们不会破坏其他文件中的某些链接。