[LLVMbugs] [Bug 12320] New: some 'configure' problems

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=12320

             Bug #: 12320
           Summary: some 'configure' problems
           Product: new-bugs
           Version: unspecified
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: new bugs
        AssignedTo: unassignedbugs at nondot.org
        ReportedBy: sbn at tbricks.com
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified


Created attachment 8246
  --> http://llvm.org/bugs/attachment.cgi?id=8246
suggested patch

While bootstrapping clang w/ libc++ on Solaris I found several problems 
in "configure" scripts.

1) Typo in std::isinf() detection in autoconf/m4/func_isinf.m4
   Duplicated in projects/sample/autoconf/m4/func_isinf.m4

2) When configuring clang to build using libc++ I think '-stdlib=libc++' 
should be used for all C++ configure tests

3) 'projects/sample' has its own configure script which lacks libc++ support

I attached patch, please review/commit.

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