<HTML><BODY style="word-wrap: break-word; -khtml-nbsp-mode: space; -khtml-line-break: after-white-space; ">When built using the guidelines in the README.LLVM to use the system's libstdc++ I get the following types of errors whenever I try to use the standard library (say by running the front end test suite in llvm/test):<DIV><BR class="khtml-block-placeholder"></DIV><DIV>/usr/include/c++/4.0.0/cmath:49:28: error: bits/c++config.h: No such file or directory</DIV><DIV>/usr/include/c++/4.0.0/iosfwd:45:29: error: bits/c++locale.h: No such file or directory</DIV><DIV>/usr/include/c++/4.0.0/iosfwd:46:25: error: bits/c++io.h: No such file or directory</DIV><DIV>/usr/include/c++/4.0.0/bits/atomicity.h:38:30: error: bits/atomic_word.h: No such file or directory</DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV>Is this a product of the system's libstdc++ getting out of date w.r.t. the llvm-gcc tip? Should one now be building llvm-gcc's libstdc++ rather than using the system version on OS X?</DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV> <SPAN class="Apple-style-span" style="border-collapse: separate; border-spacing: 0px 0px; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-align: auto; -khtml-text-decorations-in-effect: none; text-indent: 0px; -apple-text-size-adjust: auto; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px; "><SPAN class="Apple-style-span" style="border-collapse: separate; border-spacing: 0px 0px; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-align: auto; -khtml-text-decorations-in-effect: none; text-indent: 0px; -apple-text-size-adjust: auto; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px; "><DIV>--</DIV><DIV>Christopher Lamb</DIV><DIV><BR class="khtml-block-placeholder"></DIV><BR class="Apple-interchange-newline"></SPAN></SPAN> </DIV><BR></BODY></HTML>