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Chapter 52. Compiler and Tools

GCC thread sanitizer included in RHEL no longer works

Due to incompatible changes in kernel memory mapping, the thread sanitizer included with the GNU C Compiler (GCC) compiler version in RHEL no longer works. Additionally, the thread sanitizer cannot be adapted to the incompatible memory layout. As a result, it is no longer possible to use the GCC thread sanitizer included with RHEL.
As a workaround, use the version of GCC included in Red Hat Developer Toolset to build code which uses the thread sanitizer. (BZ#1569484)

ksh with the KEYBD trap mishandles multibyte characters

The Korn Shell (KSH) is unable to correctly handle multibyte characters when the KEYBD trap is enabled. Consequently, when the user enters, for example, Japanese characters, ksh displays an incorrect string. To work around this problem, disable the KEYBD trap in the /etc/kshrc file by commenting out the following line: 
trap keybd_trap KEYBD
For more details, see a related Knowledgebase solution. (BZ#1503922)