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<base href="https://llvm.org/bugs/" />
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<body><table border="1" cellspacing="0" cellpadding="8">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - clang omits valid c++ search path when -isysroot is set to SDKs in Xcode.app"
href="https://llvm.org/bugs/show_bug.cgi?id=30647">30647</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>clang omits valid c++ search path when -isysroot is set to SDKs in Xcode.app
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
<tr>
<th>Hardware</th>
<td>Macintosh
</td>
</tr>
<tr>
<th>OS</th>
<td>MacOS X
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>-New Bugs
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>howarth.mailing.lists@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>The llvm.org clang compiler omits a usable search path for the system c++
headers when the -isysroot option is set to an SDK from Xcode.app. For
example...
$ clang++-4.0 -isysroot
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk
-v -c hello.cc
clang version 4.0.0 (trunk)
Target: x86_64-apple-darwin15.6.0
Thread model: posix
InstalledDir: /sw/bin
"/sw/opt/llvm-4.0/bin/clang-4.0" -cc1 -triple x86_64-apple-macosx10.12.0
-Wdeprecated-objc-isa-usage -Werror=deprecated-objc-isa-usage -emit-obj
-mrelax-all -disable-free -disable-llvm-verifier -discard-value-names
-main-file-name hello.cc -mrelocation-model pic -pic-level 2 -mthread-model
posix -mdisable-fp-elim -masm-verbose -munwind-tables -target-cpu core2
-target-linker-version 274.1 -v -dwarf-column-info -debugger-tuning=lldb
-coverage-notes-file /Users/howarth/hello.gcno -resource-dir
/sw/opt/llvm-4.0/bin/../lib/clang/4.0.0 -isysroot
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk
-stdlib=libc++ -fdeprecated-macro -fdebug-compilation-dir /Users/howarth
-ferror-limit 19 -fmessage-length 161 -stack-protector 1 -fblocks
-fobjc-runtime=macosx-10.12.0 -fencode-extended-block-signature
-fcxx-exceptions -fexceptions -fmax-type-align=16 -fdiagnostics-show-option
-fcolor-diagnostics -o hello.o -x c++ hello.cc
clang -cc1 version 4.0.0 based upon LLVM 4.0.0 default target
x86_64-apple-darwin15.6.0
ignoring nonexistent directory "/sw/opt/llvm-4.0/bin/../include/c++/v1"
ignoring nonexistent directory
"/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include/c++/v1"
ignoring nonexistent directory
"/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/usr/local/include"
ignoring nonexistent directory
"/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/Library/Frameworks"
#include "..." search starts here:
#include <...> search starts here:
/sw/opt/llvm-4.0/bin/../lib/clang/4.0.0/include
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/usr/include
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks
(framework directory)
End of search list.
hello.cc:1:10: fatal error: 'iostream' file not found
#include <iostream>
^
1 error generated.
whereas Apple clang-800.0.42 produces...
$ clang++ -isysroot
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk
-v -c hello.cc
Apple LLVM version 8.0.0 (clang-800.0.42)
Target: x86_64-apple-darwin15.6.0
Thread model: posix
InstalledDir:
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin
"/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang"
-cc1 -triple x86_64-apple-macosx10.12.0 -Wdeprecated-objc-isa-usage
-Werror=deprecated-objc-isa-usage -emit-obj -mrelax-all -disable-free
-disable-llvm-verifier -discard-value-names -main-file-name hello.cc
-mrelocation-model pic -pic-level 2 -mthread-model posix -mdisable-fp-elim
-masm-verbose -munwind-tables -target-cpu penryn -target-linker-version 274.1
-v -dwarf-column-info -debugger-tuning=lldb -coverage-file
/Users/howarth/hello.cc -resource-dir
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../lib/clang/8.0.0
-isysroot
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk
-stdlib=libc++ -fdeprecated-macro -fdebug-compilation-dir /Users/howarth
-ferror-limit 19 -fmessage-length 161 -stack-protector 1 -fblocks
-fobjc-runtime=macosx-10.12.0 -fencode-extended-block-signature
-fcxx-exceptions -fexceptions -fmax-type-align=16 -fdiagnostics-show-option
-fcolor-diagnostics -o hello.o -x c++ hello.cc
clang -cc1 version 8.0.0 (clang-800.0.42) default target
x86_64-apple-darwin15.6.0
ignoring nonexistent directory
"/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/usr/include/c++/v1"
ignoring nonexistent directory
"/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/usr/local/include"
ignoring nonexistent directory
"/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/Library/Frameworks"
#include "..." search starts here:
#include <...> search starts here:
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../lib/clang/8.0.0/include
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/usr/include
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/System/Library/Frameworks
(framework directory)
End of search list.
which produces a valid c++ header search path of...
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1
compared llvm.org's clang compiler which mangles this path by prefixing an
additional instance of
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk
before the valid path of
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include/c++/v1
making it unusable.</pre>
</div>
</p>
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