The formatting for the example snippet got messed up. Here's a fixed version:
$ echo 'int main(){}' > foo.c $ ~/gcc/install/bin/gcc -c foo.c -O2 -g -flto=auto -ffat-lto-objects -fdebug-prefix-map=`pwd`=/aaaaaaa -o foo $ ~/gcc/install/bin/gcc foo -flto=auto -ffat-lto-objects -o bar
The formatting for the example snippet got messed up. Here's a fixed version:
$ echo 'int main(){}' > foo.c bin/gcc -c foo.c -O2 -g -flto=auto -ffat-lto-objects -fdebug- prefix- map=`pwd` =/aaaaaaa -o foo bin/gcc foo -flto=auto -ffat-lto-objects -o bar
$ ~/gcc/install/
$ ~/gcc/install/