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g++.dg/warn/Wstringop-overflow-6.C tests for a bogus overflow warning in system headers. This testcase was generating a -Wchar-subscript warning on AIX because ctype_inline.h was subscripting AIX _OBJ_DATA using a char. The _M_table case cast the subscript to unsigned char, but the _OBJ_DATA case did not. The investigation also exposed that AIX has added a thread-safe variant of access to __lc_type that had not been applied to the libstdc++ implementation. This patch casts the subscript to unsigned char and adds the THREAD_SAFE variant. libstdc++ always is compiled with pthreads, but it is good to make the situation explicit and to document the appropriate usage. Bootstrapped on powerpc-ibm-aix7.2.3.0. libstdc++-v3/ChangeLog: * config/os/aix/ctype_inline.h (bool ctype<char>:: is): Cast _OBJ_DATA subscript to unsigned char. Add _THREAD_SAFE access to __lc_type. (const char* ctype<char>:: is): Same. |
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| testsuite | ||
| acinclude.m4 | ||
| aclocal.m4 | ||
| ChangeLog | ||
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| config.h.in | ||
| configure | ||
| configure.ac | ||
| configure.host | ||
| crossconfig.m4 | ||
| fragment.am | ||
| linkage.m4 | ||
| Makefile.am | ||
| Makefile.in | ||
| README | ||
file: libstdc++-v3/README New users may wish to point their web browsers to the file index.html in the 'doc/html' subdirectory. It contains brief building instructions and notes on how to configure the library in interesting ways.