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      <base href="https://llvm.org/bugs/" />
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    <body><span class="vcard"><a class="email" href="mailto:echristo@gmail.com" title="Eric Christopher <echristo@gmail.com>"> <span class="fn">Eric Christopher</span></a>
</span> changed
              <a class="bz_bug_link 
          bz_status_RESOLVED  bz_closed"
   title="RESOLVED FIXED - Need a build system check to make sure the chosen compiler is sane"
   href="https://llvm.org/bugs/show_bug.cgi?id=16576">bug 16576</a>
        <br>
             <table border="1" cellspacing="0" cellpadding="8">
          <tr>
            <th>What</th>
            <th>Removed</th>
            <th>Added</th>
          </tr>

         <tr>
           <td style="text-align:right;">Status</td>
           <td>NEW
           </td>
           <td>RESOLVED
           </td>
         </tr>

         <tr>
           <td style="text-align:right;">Resolution</td>
           <td>---
           </td>
           <td>FIXED
           </td>
         </tr></table>
      <p>
        <div>
            <b><a class="bz_bug_link 
          bz_status_RESOLVED  bz_closed"
   title="RESOLVED FIXED - Need a build system check to make sure the chosen compiler is sane"
   href="https://llvm.org/bugs/show_bug.cgi?id=16576#c2">Comment # 2</a>
              on <a class="bz_bug_link 
          bz_status_RESOLVED  bz_closed"
   title="RESOLVED FIXED - Need a build system check to make sure the chosen compiler is sane"
   href="https://llvm.org/bugs/show_bug.cgi?id=16576">bug 16576</a>
              from <span class="vcard"><a class="email" href="mailto:echristo@gmail.com" title="Eric Christopher <echristo@gmail.com>"> <span class="fn">Eric Christopher</span></a>
</span></b>
        <pre>This is fixed:

dnl If CXX is Clang, check that it can find and parse C++ standard library
dnl headers.
if test "$CXX" = "clang++" ; then
  AC_MSG_CHECKING([whether clang works])
  AC_LANG_PUSH([C++])
  dnl Note that space between 'include' and '(' is required.  There's a broken
  dnl regex in aclocal that otherwise will think that we call m4's include
  dnl builtin.
  AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <limits>
#if __has_include (<cxxabi.h>)
#include <cxxabi.h>
#endif
#if __has_include (<unwind.h>)
#include <unwind.h>
#endif
]])],
[
  AC_MSG_RESULT([yes])
],
[
  AC_MSG_RESULT([no])
  AC_MSG_ERROR([Selected compiler could not find or parse C++ standard library
headers.  Rerun with CC=c-compiler CXX=c++-compiler LLVM_SRC_DIR/configure
...])
])
  AC_LANG_POP([C++])
fi</pre>
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