https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70936
--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> --- This problem does not exiast for a native compiler on GNU/Linux. Installation in $PREFIX=$HOME/gcc/6.1.0: ignoring nonexistent directory "/home/jwakely/gcc/6.1.0/bin/../lib/gcc/x86_64-pc-linux-gnu/6.1.0/../../../../x86_64-pc-linux-gnu/include" ignoring duplicate directory "/home/jwakely/gcc/6.1.0/bin/../lib/gcc/../../lib/gcc/x86_64-pc-linux-gnu/6.1.0/../../../../include/c++/6.1.0" ignoring duplicate directory "/home/jwakely/gcc/6.1.0/bin/../lib/gcc/../../lib/gcc/x86_64-pc-linux-gnu/6.1.0/../../../../include/c++/6.1.0/x86_64-pc-linux-gnu" ignoring duplicate directory "/home/jwakely/gcc/6.1.0/bin/../lib/gcc/../../lib/gcc/x86_64-pc-linux-gnu/6.1.0/../../../../include/c++/6.1.0/backward" ignoring duplicate directory "/home/jwakely/gcc/6.1.0/bin/../lib/gcc/../../lib/gcc/x86_64-pc-linux-gnu/6.1.0/include" ignoring duplicate directory "/home/jwakely/gcc/6.1.0/bin/../lib/gcc/../../lib/gcc/x86_64-pc-linux-gnu/6.1.0/include-fixed" ignoring nonexistent directory "/home/jwakely/gcc/6.1.0/bin/../lib/gcc/../../lib/gcc/x86_64-pc-linux-gnu/6.1.0/../../../../x86_64-pc-linux-gnu/include" #include "..." search starts here: #include <...> search starts here: /home/jwakely/gcc/6.1.0/bin/../lib/gcc/x86_64-pc-linux-gnu/6.1.0/../../../../include/c++/6.1.0 /home/jwakely/gcc/6.1.0/bin/../lib/gcc/x86_64-pc-linux-gnu/6.1.0/../../../../include/c++/6.1.0/x86_64-pc-linux-gnu /home/jwakely/gcc/6.1.0/bin/../lib/gcc/x86_64-pc-linux-gnu/6.1.0/../../../../include/c++/6.1.0/backward /home/jwakely/gcc/6.1.0/bin/../lib/gcc/x86_64-pc-linux-gnu/6.1.0/include /home/jwakely/gcc/6.1.0/bin/../lib/gcc/x86_64-pc-linux-gnu/6.1.0/include-fixed /usr/local/include /home/jwakely/gcc/6.1.0/bin/../lib/gcc/../../include /usr/include End of search list. GNU C++14 (GCC) version 6.1.0 (x86_64-pc-linux-gnu) After relocating to /tmp/gcc: ignoring nonexistent directory "/tmp/gcc/bin/../lib/gcc/x86_64-pc-linux-gnu/6.1.0/../../../../x86_64-pc-linux-gnu/include" ignoring duplicate directory "/tmp/gcc/bin/../lib/gcc/../../lib/gcc/x86_64-pc-linux-gnu/6.1.0/../../../../include/c++/6.1.0" ignoring duplicate directory "/tmp/gcc/bin/../lib/gcc/../../lib/gcc/x86_64-pc-linux-gnu/6.1.0/../../../../include/c++/6.1.0/x86_64-pc-linux-gnu" ignoring duplicate directory "/tmp/gcc/bin/../lib/gcc/../../lib/gcc/x86_64-pc-linux-gnu/6.1.0/../../../../include/c++/6.1.0/backward" ignoring duplicate directory "/tmp/gcc/bin/../lib/gcc/../../lib/gcc/x86_64-pc-linux-gnu/6.1.0/include" ignoring duplicate directory "/tmp/gcc/bin/../lib/gcc/../../lib/gcc/x86_64-pc-linux-gnu/6.1.0/include-fixed" ignoring nonexistent directory "/tmp/gcc/bin/../lib/gcc/../../lib/gcc/x86_64-pc-linux-gnu/6.1.0/../../../../x86_64-pc-linux-gnu/include" #include "..." search starts here: #include <...> search starts here: /tmp/gcc/bin/../lib/gcc/x86_64-pc-linux-gnu/6.1.0/../../../../include/c++/6.1.0 /tmp/gcc/bin/../lib/gcc/x86_64-pc-linux-gnu/6.1.0/../../../../include/c++/6.1.0/x86_64-pc-linux-gnu /tmp/gcc/bin/../lib/gcc/x86_64-pc-linux-gnu/6.1.0/../../../../include/c++/6.1.0/backward /tmp/gcc/bin/../lib/gcc/x86_64-pc-linux-gnu/6.1.0/include /tmp/gcc/bin/../lib/gcc/x86_64-pc-linux-gnu/6.1.0/include-fixed /usr/local/include /tmp/gcc/bin/../lib/gcc/../../include /usr/include End of search list. GNU C++14 (GCC) version 6.1.0 (x86_64-pc-linux-gnu) The paths are the same except for the prefix, as expected.
