[LLVMbugs] [Bug 12303] New: Undefined std::ctype<char>::_M_widen_init() when using iostream at optimization > 0

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=12303

             Bug #: 12303
           Summary: Undefined std::ctype<char>::_M_widen_init() when using
                    iostream at optimization > 0
           Product: clang
           Version: trunk
          Platform: Macintosh
        OS/Version: MacOS X
            Status: NEW
          Severity: normal
          Priority: P
         Component: C++
        AssignedTo: unassignedclangbugs at nondot.org
        ReportedBy: abigagli at gmail.com
                CC: dgregor at apple.com, llvmbugs at cs.uiuc.edu
    Classification: Unclassified


On MacOSX 10.7.3, clang built in Release mode from trunk @r153013, libstdc++
from gcc 4.6.2:

$cat optimize.cpp

#include <iostream>

int main(int argc, const char *argv[])
{
    std::cout << "hello" << std::endl;
    return 0;
}

$clang++ -Wl,-demangle -v -O1 optimize.cpp -o optimize

clang version 3.1 (trunk 153013)
Target: x86_64-apple-darwin11.3.0
Thread model: posix
 "/Users/abigagli/LLVM-LOCAL/3.1svn/INSTALL/bin/clang" -cc1 -triple
x86_64-apple-macosx10.7.0 -emit-obj -disable-free -main-file-name optimize.cpp
-pic-level 1 -mdisable-fp-elim -masm-verbose -munwind-tables -target-cpu core2
-v -resource-dir /Users/abigagli/LLVM-LOCAL/3.1svn/INSTALL/bin/../lib/clang/3.1
-fmodule-cache-path
/var/folders/59/_cxj9vx5675bjmykljv0vdm00000gn/T/clang-module-cache -O1
-fdeprecated-macro -fdebug-compilation-dir
/Users/abigagli/scratch/clang_experiments -ferror-limit 19 -fmessage-length 250
-stack-protector 1 -mstackrealign -fblocks -fobjc-runtime-has-arc
-fobjc-runtime-has-weak -fobjc-dispatch-method=mixed
-fobjc-default-synthesize-properties -fcxx-exceptions -fexceptions
-fdiagnostics-show-option -fcolor-diagnostics -o
/var/folders/59/_cxj9vx5675bjmykljv0vdm00000gn/T/optimize-3hi0BR.o -x c++
optimize.cpp
clang -cc1 version 3.1 based upon LLVM 3.1svn default target
x86_64-apple-darwin11.3.0
#include "..." search starts here:
#include <...> search starts here:
 /Users/abigagli/GCC-CURRENT/include/c++/4.6.2
 /Users/abigagli/GCC-CURRENT/include/c++/4.6.2/x86_64-apple-darwin11.3.0
 /Users/abigagli/GCC-CURRENT/include/c++/4.6.2/backward
 /usr/local/include
 /Users/abigagli/LLVM-LOCAL/3.1svn/INSTALL/bin/../lib/clang/3.1/include
 /usr/include
 /System/Library/Frameworks (framework directory)
 /Library/Frameworks (framework directory)
End of search list.
 "/usr/llvm-gcc-4.2/libexec/gcc/i686-apple-darwin11/4.2.1/ld" -dynamic -arch
x86_64 -macosx_version_min 10.7.0 -o optimize -lcrt1.10.6.o -demangle
/var/folders/59/_cxj9vx5675bjmykljv0vdm00000gn/T/optimize-3hi0BR.o -lstdc++
-lSystem
/Users/abigagli/LLVM-LOCAL/3.1svn/INSTALL/bin/../lib/clang/3.1/lib/darwin/libclang_rt.osx.a
Undefined symbols for architecture x86_64:
  "std::ctype<char>::_M_widen_init() const", referenced from:
      std::ctype<char>::widen(char) const in optimize-3hi0BR.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

Only compiling with -O0 succeeds.
NOTE: Using stdlib=libc++ or Apple's clang from Xcode 4.3 works at every
optimization level.

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