Source: gcc-3.3 Version: 1:3.3.6ds1-29 Severity: serious https://tests.reproducible-builds.org/debian/rb-pkg/unstable/amd64/gcc-3.3.html
... ./xgcc -B./ -B/usr/x86_64-linux-gnu/bin/ -isystem /usr/x86_64-linux-gnu/include -isystem /usr/x86_64-linux-gnu/sys-include -O2 -DIN_GCC -W -Wall -Wwrite-strings -Wstrict-prototypes -Wmissing-prototypes -isystem ./include -fPIC -g -DHAVE_GTHR_DEFAULT -DIN_LIBGCC2 -D__GCC_FLOAT_NOT_NEEDED -I. -I. -I../../src/gcc -I../../src/gcc/. -I../../src/gcc/config -I../../src/gcc/../include -fexceptions -c ../../src/gcc/unwind-dw2.c -o libgcc/./unwind-dw2.o ../../src/gcc/unwind-dw2.c: In function `uw_frame_state_for': ../../src/gcc/unwind-dw2.c:954: error: dereferencing pointer to incomplete type libgcc.mk:104: recipe for target 'libgcc/./unwind-dw2.o' failed make[5]: *** [libgcc/./unwind-dw2.o] Error 1 My first suspect would be some change in the glibc 2.26 headers.