libobjc2 build issues (missing files)

[Andreas Fink]

Hello

Today I tried to build libobjc2 + Gnustep packages under Debian 10 (Buster) and 
I did run into a new problem:



cmake  .. -DCMAKE_BUILD_TYPE=RelWithDebInfo -DBUILD_STATIC_LIBOBJC=1  
-DCMAKE_C_COMPILER=/usr/bin/clan   -DCMAKE_CXX_COMPILER=/usr/bin/clang++

...
make -j8
...

[ 10%] Building C object CMakeFiles/objc.dir/hooks.c.o
[ 10%] Building C object CMakeFiles/objc.dir/ivar.c.o
[ 10%] Building C object CMakeFiles/objc.dir/loader.c.o
[ 11%] Building C object CMakeFiles/objc.dir/mutation.m.o
[ 11%] Building C object CMakeFiles/objc.dir/protocol.c.o
[ 11%] Building C object CMakeFiles/objc.dir/runtime.c.o
[ 11%] Building C object CMakeFiles/objc.dir/sarray2.c.o
[ 12%] Building C object CMakeFiles/objc.dir/selector_table.c.o
[ 12%] Building C object CMakeFiles/objc.dir/sendmsg2.c.o
[ 12%] Building C object CMakeFiles/objc.dir/eh_personality.c.o
[ 12%] Building C object CMakeFiles/objc.dir/legacy.c.o
[ 12%] Building C object CMakeFiles/objc.dir/abi_version.c.o
[ 13%] Building C object CMakeFiles/objc.dir/statics_loader.c.o
[ 13%] Building ASM object CMakeFiles/objc.dir/block_trampolines.S.o
[ 13%] Building ASM object CMakeFiles/objc.dir/objc_msgSend.S.o
[ 13%] Building C object CMakeFiles/objc.dir/NSBlocks.m.o
[ 13%] Building C object CMakeFiles/objc.dir/associate.m.o
[ 14%] Building C object CMakeFiles/objc.dir/Protocol2.m.o
[ 14%] Building C object CMakeFiles/objc.dir/blocks_runtime.m.o
[ 14%] Building C object CMakeFiles/objc.dir/properties.m.o
[ 15%] Building C object CMakeFiles/objc.dir/gc_none.c.o
[ 15%] Building CXX object CMakeFiles/objc.dir/arc.mm.o
[ 15%] Building CXX object CMakeFiles/objc.dir/objcxx_eh.cc.o
[ 15%] Building CXX object 
CMakeFiles/objc.dir/libstdcxx_current_primary_exception.cc.o
/Users/afink/development/gnustep/libobjc2/arc.mm:6:10: fatal error: 
'third_party/robin-map/include/tsl/robin_map.h' file not found
#include "third_party/robin-map/include/tsl/robin_map.h"
         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1 error generated.
make[2]: *** [CMakeFiles/objc.dir/build.make:411: CMakeFiles/objc.dir/arc.mm.o] 
Error 1
make[2]: *** Waiting for unfinished jobs....
[ 16%] Linking CXX static library libobjc.a
make[1]: *** [CMakeFiles/Makefile2:484: CMakeFiles/objc.dir/all] Error 2
make[1]: *** Waiting for unfinished jobs....
[ 16%] Built target objc-static
make: *** [Makefile:163: all] Error 2


Can anyone hint where this file should come from?