a-direct.adb:43:06: "System.Os_Constants" is not a predefined library unit
a-direct.adb:43:06: "Ada.Directories (body)" depends on "System.File_Attributes (spec)"
a-direct.adb:43:06: "System.File_Attributes (spec)" depends on "System.Os_Constants (spec)"
../gcc-interface/Makefile:307: recipe for target 'a-direct.o' failed
make[4]: *** [a-direct.o] Error 1
make[4]: Leaving directory '/tmp/build/toolchain.GBHLpc/toolchain/build/gcc/ada/rts'
gcc-interface/Makefile:2730: recipe for target 'gnatlib' failed
make[3]: *** [gnatlib] Error 2
make[3]: Leaving directory '/tmp/build/toolchain.GBHLpc/toolchain/build/gcc/ada'
Makefile:104: recipe for target 'gnatlib-plain' failed
make[2]: *** [gnatlib-plain] Error 2
make[2]: Leaving directory '/tmp/build/toolchain.GBHLpc/toolchain/build/x86_64-linux-musl/libada'
Makefile:17379: recipe for target 'all-target-libada' failed
make[1]: *** [all-target-libada] Error 2
make[1]: Leaving directory '/tmp/build/toolchain.GBHLpc/toolchain/build'
Makefile:872: recipe for target 'all' failed
make: *** [all] Error 2