In traditional CPP mode (-save-temps, -no-integrated-cpp, etc.), the
compilation directory is conveyed to cc1 using a line such as:
# <line> "/path/name//"
This string literal can contain escape sequences, for instance, if the
original source file was compiled in "/tmp/a\b", then this line will be:
# <line> "/tmp/a\\b//"
So reading the compilation directory must decode escape sequences. This
last part is currently missing and this patch implements it.
libcpp/
* init.cc (read_original_directory): Attempt to decode escape
sequences with cpp_interpret_string_notranslate.
be496fd2aa