Compilazione fallisce

Fallisce solo la prima volta mentre va a buon fine dalla seconda volta in poi

NOTE: make -j 16
|   Building Shared Library...
| x86_64-voltumna-linux-gcc  -m64 -march=cascadelake -mavx2 -mfpmath=sse --sysroot=/home/alessio.bogani/build-images/ccd/build0/tmp/work/cascadelake-64-voltumna-linux/libbufferrt/1.0.0-r0/recipe-sysroot  -O2 -pipe -g -feliminate-unused-debug-types -fmacro-prefix-map=/home/alessio.bogani/build-images/ccd/build0/tmp/work/cascadelake-64-voltumna-linux/libbufferrt/1.0.0-r0=/usr/src/debug/libbufferrt/1.0.0-r0                      -fdebug-prefix-map=/home/alessio.bogani/build-images/ccd/build0/tmp/work/cascadelake-64-voltumna-linux/libbufferrt/1.0.0-r0=/usr/src/debug/libbufferrt/1.0.0-r0                      -fdebug-prefix-map=/home/alessio.bogani/build-images/ccd/build0/tmp/work/cascadelake-64-voltumna-linux/libbufferrt/1.0.0-r0/recipe-sysroot=                      -fdebug-prefix-map=/home/alessio.bogani/build-images/ccd/build0/tmp/work/cascadelake-64-voltumna-linux/libbufferrt/1.0.0-r0/recipe-sysroot-native=  -Wall -fPIC -c src/buffer.c -o obj/buffer.o
| Assembler messages:
| Fatal error: can't create obj/buffer.o: No such file or directory
| src/buffer.c: In function 'read_data_filter':
| src/buffer.c:829:16: warning: variable 'type_size' set but not used [-Wunused-but-set-variable]
|   829 |  unsigned long type_size;
|       |                ^~~~~~~~~
| Makefile:47: recipe for target 'obj/buffer.o' failed
| make: *** [obj/buffer.o] Error 2
| make: *** Waiting for unfinished jobs....
| ERROR: oe_runmake failed