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The driver uses the 'join' function to calculate the default output for the -fdeps-file and -fdeps-target parameters from the parameter given to -o (or the basename of the input file). But if the path given to -o has any whitespace in it this causes cc1plus to see arguments like "-o some file.o" "-fdeps-file=some" "file.ddi" which breaks. Fixed by adjusting the 'join' function to escape any special characters in the result. PR c++/120974 gcc/ChangeLog: * gcc.cc (join_spec_func): Escape special characters. Signed-off-by: Nathaniel Shead <nathanieloshead@gmail.com> Reviewed-by: Jason Merrill <jason@redhat.com>
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