Link error with libiconv on MacOS

[r0ml]

Compiling a small program results in this error message:

[1 of 2] Compiling TestHelper? ( testsuite/tests/TestHelper.hs, dist/build/test-played-tracks/test-played-tracks-tmp/TestHelper.o ) [2 of 2] Compiling Main ( testsuite/tests/TestPlayedTracks.hs, dist/build/test-played-tracks/test-played-tracks-tmp/Main.o ) Linking dist/build/test-played-tracks/test-played-tracks ... Undefined symbols for architecture x86_64:

"_iconv", referenced from:

_hs_iconv in libHSbase-4.5.1.0.a(iconv.o)

(maybe you meant: _base_GHCziIOziEncodingziIconv_iconvEncoding8_closure, _base_GHCziIOziEncodingziIconv_iconvEncoding5_info , _base_GHCziIOziEncodingziIconv_iconvEncoding10_closure , _base_GHCziIOziEncodingziIconv_iconvEncodingzuloc1_closure , _base_GHCziIOziEncodingziIconv_iconvEncoding7_closure , _base_GHCziIOziEncodingziIconv_iconvEncoding6_info , _hs_iconv_open , _base_GHCziIOziEncodingziIconv_iconvEncoding6_closure , _base_GHCziIOziEncodingziIconv_iconvEncoding7_info , _base_GHCziIOziEncodingziIconv_iconvEncoding5_closure , _base_GHCziIOziEncodingziIconv_iconvEncoding8_info , _base_GHCziIOziEncodingziIconv_iconvEncoding4_closure , _base_GHCziIOziEncodingziIconv_iconvEncoding9_info , _base_GHCziIOziEncodingziIconv_iconvEncoding3_closure , _base_GHCziIOziEncodingziIconv_iconvEncoding2_info , _base_GHCziIOziEncodingziIconv_iconvEncoding2_closure , _hs_iconv , _base_GHCziIOziEncodingziIconv_iconvEncoding3_info , _base_GHCziIOziEncodingziIconv_iconvEncoding10_info , _base_GHCziIOziEncodingziIconv_iconvEncodingzuloc_closure , _base_GHCziIOziEncodingziIconv_iconvEncodingzuloc_info , _base_GHCziIOziEncodingziIconv_iconvEncoding9_closure , _hs_iconv_close , _base_GHCziIOziEncodingziIconv_iconvEncodingzuloc1_info )

"_iconv_close", referenced from:

_hs_iconv_close in libHSbase-4.5.1.0.a(iconv.o)

(maybe you meant: _hs_iconv_close)

"_iconv_open", referenced from:

_hs_iconv_open in libHSbase-4.5.1.0.a(iconv.o)

(maybe you meant: _hs_iconv_open)

"_locale_charset", referenced from:

_localeEncoding in libHSbase-4.5.1.0.a(PrelIOUtils.o)

ld: symbol(s) not found for architecture x86_64 collect2: ld returned 1 exit status

It seems that ghc is looking in the wrong directory for libiconv. By specifying --extra-lib-dirs=/usr/lib compilation works.

The MacOS Version is 10.8.2

[r0ml]

See also http://hackage.haskell.org/trac/ghc/ticket/4068.

[mzero]

This bug arises when people install versions of system libs (like iconv) from brew. GHC has long since ensured they use the right version... and there is little the platform can do beyond that.