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On AIX, stat will store inodes in 32bit even when using LARGE_FILES. If the inode is larger, it will return -1 in st_ino. Thus, in incpath.c when comparing include directories, if several of them have 64bit inodes, they will be considered as duplicated. gcc/ChangeLog: 2022-01-12 Clément Chigot <clement.chigot@atos.net> * configure.ac: Check sizeof ino_t and dev_t. (HOST_STAT_FOR_64BIT_INODES): New AC_DEFINE to provide stat syscall being able to handle 64bit inodes. * config.in: Regenerate. * configure: Regenerate. * incpath.c (HOST_STAT_FOR_64BIT_INODES): New define. (remove_duplicates): Use it. libcpp/ChangeLog: 2022-01-12 Clément Chigot <clement.chigot@atos.net> * configure.ac: Check sizeof ino_t and dev_t. * config.in: Regenerate. * configure: Regenerate. * include/cpplib.h (INO_T_CPP): Change for AIX. (DEV_T_CPP): New macro. (struct cpp_dir): Use it.
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