https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64740
Bug ID: 64740 Summary: ld called with -plugin-opt=-fresolution=-plugin-opt=-debug.res Product: gcc Version: 5.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: driver Assignee: unassigned at gcc dot gnu.org Reporter: vries at gcc dot gnu.org I. When doing lto using a single gcc invocation: ... $install/bin/gcc $src/libgomp/testsuite/libgomp.c/target-9.c \ -Wl,-rpath=$install/lib64 \ -flto -ftree-parallelize-loops=0 -fopenmp \ -o ./a.out \ $verboseflags ... for different verboseflags, we get the following plugin-opt args for ld: 1. -v -Wl,-v -Wl,-plugin-opt=-debug -plugin-opt=-fresolution=/tmp/cc3WBKNB.res -plugin-opt=-debug 2. -v -Wl,-v -save-temps -plugin-opt=-fresolution=target-9.res 3. -v -Wl,-v -Wl,-plugin-opt=-debug -save-temps -plugin-opt=-fresolution=target-9.res -plugin-opt=-debug Those results look as expected. II. When doing lto using a two gcc invocations: ... $install/bin/gcc $src/libgomp/testsuite/libgomp.c/target-9.c \ -Wl,-rpath=$install/lib64 \ -flto -ftree-parallelize-loops=0 -fopenmp \ -c -o obj.o $install/bin/gcc obj.o -Wl,-rpath=$install/lib64 \ -flto -ftree-parallelize-loops=0 \ -o ./a.out \ $verboseflags for different verboseflags, we get the following plugin-opt args for ld: 1. -v -Wl,-v -Wl,-plugin-opt=-debug -plugin-opt=-fresolution=/tmp/ccCYQEcq.res -plugin-opt=-debug 2. -v -Wl,-v -save-temps -plugin-opt=-fresolution=-v.res 3. -v -Wl,-v -Wl,-plugin-opt=-debug -save-temps -plugin-opt=-fresolution=-plugin-opt=-debug.res -plugin-opt=-debug The last two don't seem intentional to me. We're using an intermediate file starting with an option name. Still the compilation succeeds without any problems.