Compilation failure under mingw64

[peardox]

Does a load of the easie bits then gets to GCC and eventually...

build/gencheck.exe > tmp-check.h /bin/sh /home/simon/riscv-gnu-toolchain/gcc-14/gcc/../move-if-change tmp-check.h tree-check.h echo timestamp > s-check g++ -g -O2 -DIN_GCC -DCROSS_DIRECTORY_STRUCTURE -fno-exceptions -fno-rtti -fasynchronous-unwind-tables -W -Wall -Wno-narrowing -Wwrite-strings -Wcast-qual -Wmissing-format-attribute -Wconditionally-supported -Woverloaded-virtual -pedantic -Wno-long-long -Wno-variadic-macros -Wno-overlength-strings -DHAVE_CONFIG_H -DGENERATOR_FILE -static-libstdc++ -static-libgcc -Wl,--stack,12582912 -Wl,--undefined=HOST_EXTRA_OBJS_SYMBOL -o build/genrvv-type-indexer.exe
build/genrvv-type-indexer.o ../build-i686-w64-mingw32/libiberty/libiberty.a build/genrvv-type-indexer.exe tmp-riscv-vector-type-indexer.gen.def /bin/sh /home/simon/riscv-gnu-toolchain/gcc-14/gcc/../move-if-change tmp-riscv-vector-type-indexer.gen.def riscv-vector-type-indexer.gen.def echo timestamp > s-riscv-vector-type-indexer.gen.defs build/gengtype.exe
-S /home/simon/riscv-gnu-toolchain/gcc-14/gcc -I gtyp-input.list -w tmp-gtype.state /home/simon/riscv-gnu-toolchain/gcc-14/gcc/../libcpp/include/line-map.h: No such file or directory make[2]: *** [Makefile:2970: s-gtype] Error 1 make[2]: *** Waiting for unfinished jobs.... /bin/sh /home/simon/riscv-gnu-toolchain/gcc-14/gcc/../move-if-change tmp-mlib.h multilib.h echo timestamp > s-mlib

There is a gcc/libcpp/include/line-map.h in the gcc git however and it compiles under Linux OK - problematic MSYS toolchain???