Hi, we noticed that the profile directory will be concatenated with object file path.
the following small example explain this behavior: [qinzhao@localhost small]$ cat t #! /bin/bash CC=/home/qinzhao/Install/latest/bin/gcc opt="-O3 -fprofile-generate" opt="$opt -fprofile-dir=/home/qinzhao/prof_dir" opt="$opt -c -o /home/qinzhao/obj_dir/t.o" tf="t.c" echo $CC $opt $tf $CC $opt $tf strings /home/qinzhao/obj_dir/t.o | grep prof_dir [qinzhao@localhost small]$ sh t /home/qinzhao/Install/latest/bin/gcc -O3 -fprofile-generate -fprofile-dir=/home/qinzhao/prof_dir -c -o /home/qinzhao/obj_dir/t.o t.c /home/qinzhao/prof_dir//home/qinzhao/obj_dir/t.gcda [qinzhao@localhost small]$ From the above, we can see: when specifying the profiling directory with -fprofile-dir as “/home/qinzhao/prof_dir”, the user expects that the profiling data will be stored in this specific directory. However, GCC concatenates the profiling directory “/home/qinzhao/prof_dir” with the path for the object file “/home/qinzhao/obj_dir” together. As a result, the profiling data will be stored to: /home/qinzhao/prof_dir/home/qinzhao/obj_dir/ instead of /home/qinzhao/prof_dir This looks like a bug to me. any comment for this? thank you! Qing
