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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [CMake] Build failure with GCC 6 (fatal error: stdlib.h: No such file or directory)"
href="https://bugs.webkit.org/show_bug.cgi?id=161697">161697</a>
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<th>Summary</th>
<td>[CMake] Build failure with GCC 6 (fatal error: stdlib.h: No such file or directory)
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<th>Classification</th>
<td>Unclassified
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<th>Product</th>
<td>WebKit
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<th>Version</th>
<td>WebKit Nightly Build
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<th>Hardware</th>
<td>Unspecified
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<th>OS</th>
<td>Unspecified
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<th>Status</th>
<td>NEW
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<th>Severity</th>
<td>Normal
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<th>Priority</th>
<td>P2
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<th>Component</th>
<td>Tools / Tests
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<th>Assignee</th>
<td>webkit-unassigned@lists.webkit.org
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<th>Reporter</th>
<td>clopez@igalia.com
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<th>CC</th>
<td>bugs-noreply@webkitgtk.org, lforschler@apple.com, mcatanzaro@igalia.com, ossy@webkit.org, raj.khem@gmail.com
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<pre>Trying to build WebKitGTK+ with GCC 6 I got this error:
In file included from /home/igalia/clopez/yocto/commit-builds/meta-webkit/builds/qemux86-64/tmp-glibc/sysroots/qemux86/usr/include/c++/6.2.0/ext/string_conversions.h:41:0,
from /home/igalia/clopez/yocto/commit-builds/meta-webkit/builds/qemux86-64/tmp-glibc/sysroots/qemux86/usr/include/c++/6.2.0/bits/basic_string.h:5402,
from /home/igalia/clopez/yocto/commit-builds/meta-webkit/builds/qemux86-64/tmp-glibc/sysroots/qemux86/usr/include/c++/6.2.0/string:52,
from /home/igalia/clopez/yocto/commit-builds/meta-webkit/builds/qemux86-64/tmp-glibc/work/i586-oe-linux/webkitgtk/2.12.5-r0/webkitgtk-2.12.5/Source/ThirdParty/ANGLE/src/common/debug.h:14,
from /home/igalia/clopez/yocto/commit-builds/meta-webkit/builds/qemux86-64/tmp-glibc/work/i586-oe-linux/webkitgtk/2.12.5-r0/webkitgtk-2.12.5/Source/ThirdParty/ANGLE/src/common/mathutil.h:12,
from /home/igalia/clopez/yocto/commit-builds/meta-webkit/builds/qemux86-64/tmp-glibc/work/i586-oe-linux/webkitgtk/2.12.5-r0/webkitgtk-2.12.5/Source/ThirdParty/ANGLE/src/common/mathutil.cpp:9:
/home/igalia/clopez/yocto/commit-builds/meta-webkit/builds/qemux86-64/tmp-glibc/sysroots/qemux86/usr/include/c++/6.2.0/cstdlib:75:25: fatal error: stdlib.h: No such file or directory
#include_next <stdlib.h>
The issue seems to be that GCC 6 has now introduced stdlib.h in libstdc++ for better compliance and its including the C library stdlib.h using include_next which is sensitive to order of system header include paths. See: <a href="https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70129">https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70129</a>
The recommended way to fix this is to stop adding include directories as system ones (-isystem) and instead use the standard way to include directories (-I)
The openembedded project is carrying this downstream patch against WebKitGTK+ 2.12 with the above fix: <a href="http://git.openembedded.org/openembedded-core/tree/meta/recipes-sato/webkit/files/0001-WebKitMacros-Append-to-I-and-not-to-isystem.patch">http://git.openembedded.org/openembedded-core/tree/meta/recipes-sato/webkit/files/0001-WebKitMacros-Append-to-I-and-not-to-isystem.patch</a>
Seems that we started using -isystem on r185806 <<a href="http://trac.webkit.org/r185806">http://trac.webkit.org/r185806</a>> as a way to silence warnings.</pre>
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