| 29 | | * The configure script of icu tries to call clang-3.4 with the option -stdlib=macports-libstdc++, even though icu will be built against libc++ (via the clang_dependency 1.0 portgroup). This option is patched in by MacPorts for clang-5.0 and newer with the +libstdcxx variant (which is enabled by default). clang ports older than 5.0 (including 3.4) don't have a +libstdcxx variant and do not support -stdlib=macports-libstdc++. |
| 30 | | * The incorrect compiler call is caused by a bug in MacPorts base, which has been reported in #59584. |
| 31 | | * As a workaround, the +libstdcxx patch from clang-5.0 can be applied to clang-3.4 (with minor modifications). This won't result in proper macports-libstdc++ support (because clang before 3.8 doesn't support compiling C++11 code against libstdc++), but it is enough to make the incorrect call from the configure script not fail. |
| | 29 | * The current version of icu requires C++11, so MacPorts tries to compile it with MacPorts Clang 3.4. However, icu needs to be built against libstdc++ (the default C++ stdlib on Tiger), which is not possible with Clang older than 3.8. |
