iconv routines get translated to libiconv_ names and fail to link on OS X

问题

I'm trying to build Hercules from the latest Subversion on Mac OS X 10.6. It uses the iconv library for character translations. The Hercules code uses iconv_open(), iconv(), and iconv_close(). Those routines are also present in the system library on 10.6, under those names. There's only one problem: I'm getting link failures for libiconv_open(), libiconv(), and libiconv_close().

I've hunted all over my system for where the names are being changed from iconv* to libiconv*, and not found a thing. Nothing in the Hercules code is doing this. Other folks are able to build fine on current OS X.

I'm missing something simple, but just can't find it. Help?

回答1:

I got this:

checking for iconv_open in -liconv... yes
checking for iconv... yes
....
Undefined symbols:
  "_libiconv_open", referenced from:
      _SDL_iconv_string in SDL_iconv.o
      _SDL_iconv_string in SDL_iconv.o
  "_libiconv", referenced from:
      _SDL_iconv in SDL_iconv.o
      _SDL_iconv_string in SDL_iconv.o
  "_libiconv_close", referenced from:
      _SDL_iconv_string in SDL_iconv.o
      _SDL_iconv_string in SDL_iconv.o
ld: symbol(s) not found
collect2: ld returned 1 exit status
make: *** [build/libSDL.la] Error 1

until I removed my two other copies in /opt/local and /usr/local (from Macports and a raw build of the GNU package). Then it worked.

回答2:

Beeing a bit late, in my case the following line did it (MacOS X 10.8.4):

CFLAGS='-isysroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.8.sdk/' LDFLAGS='-isysroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.8.sdk/ -Wl,-syslibroot,/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.8.sdk/' ./configure

I had to override the autotools LDFLAGS to tell the configure script to use the libraries shipped with the XCode SDK.

来源：https://stackoverflow.com/questions/4546484/iconv-routines-get-translated-to-libiconv-names-and-fail-to-link-on-os-x

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