https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100289
--- Comment #20 from Jan-Benedict Glaw <jbg...@lug-owl.de> --- I see this as well for my CI builds using a (slightly hacked to use local copies of the GIT trees) build-many-glibcs.py (from glibc.) If you call call: /var/lib/laminar/run/glibcbot-alpha-linux-gnu/21/glibc/scripts/build-many-glibcs.py --keep all --replace-sources -j 1 /var/lib/laminar/run/glibcbot-alpha-linux-gnu/21 checkout binutils-vcs-master gcc-vcs-master glibc-vcs-master linux-vcs-master log_execute host-libraries /var/lib/laminar/run/glibcbot-alpha-linux-gnu/21/glibc/scripts/build-many-glibcs.py --keep all --replace-sources -j 1 /var/lib/laminar/run/glibcbot-alpha-linux-gnu/21 host-libraries log_execute compilers /var/lib/laminar/run/glibcbot-alpha-linux-gnu/21/glibc/scripts/build-many-glibcs.py --keep all --replace-sources -j 1 /var/lib/laminar/run/glibcbot-alpha-linux-gnu/21 --full-gcc compilers alpha-linux-gnu (as an example, use the Alpha builds at http://toolchain.lug-owl.de/laminar/jobs/glibcbot-alpha-linux-gnu , with the actual breakage for example at http://toolchain.lug-owl.de/archive/glibcbot-alpha-linux-gnu/21/logs/compilers/alpha-linux-gnu/012-compilers-alpha-linux-gnu-gcc-first-build-log.txt) ...we're ending up at the same spot: echo 'int __libgcc_eh_dummy;' > eh_dummy.c; \ /var/lib/laminar/run/glibcbot-alpha-linux-gnu/21/build/compilers/alpha-linux-gnu/gcc-first/./gcc/xgcc -B/var/lib/laminar/run/glibcbot-alpha-linux-gnu/21/build/compilers/alpha-linux-gnu/gcc-first/./gcc/ -B/var/lib/laminar/run/glibcbot-alpha-linux-gnu/21/install/compilers/alpha-linux-gnu/alpha-glibc-linux-gnu/bin/ -B/var/lib/laminar/run/glibcbot-alpha-linux-gnu/21/install/compilers/alpha-linux-gnu/alpha-glibc-linux-gnu/lib/ -isystem /var/lib/laminar/run/glibcbot-alpha-linux-gnu/21/install/compilers/alpha-linux-gnu/alpha-glibc-linux-gnu/include -isystem /var/lib/laminar/run/glibcbot-alpha-linux-gnu/21/install/compilers/alpha-linux-gnu/alpha-glibc-linux-gnu/sys-include -g -O2 -mieee -O2 -g -O2 -mieee -DIN_GCC -DCROSS_DIRECTORY_STRUCTURE -W -Wall -Wno-narrowing -Wwrite-strings -Wcast-qual -Wstrict-prototypes -Wmissing-prototypes -Wold-style-definition -isystem ./include -fPIC -mieee -mfp-rounding-mode=d -g -DIN_LIBGCC2 -fbuilding-libgcc -fno-stack-protector -Dinhibit_libc -fPIC -mieee -mfp-rounding-mode=d -I. -I. -I../.././gcc -I/var/lib/laminar/run/glibcbot-alpha-linux-gnu/21/src/gcc/libgcc -I/var/lib/laminar/run/glibcbot-alpha-linux-gnu/21/src/gcc/libgcc/. -I/var/lib/laminar/run/glibcbot-alpha-linux-gnu/21/src/gcc/libgcc/../gcc -I/var/lib/laminar/run/glibcbot-alpha-linux-gnu/21/src/gcc/libgcc/../include -DHAVE_CC_TLS -fvisibility=hidden -DHIDE_EXPORTS -c eh_dummy.c \ -o eh_dummy.o; \ objects=eh_dummy.o; \ fi; \ /var/lib/laminar/run/glibcbot-alpha-linux-gnu/21/install/compilers/alpha-linux-gnu/alpha-glibc-linux-gnu/bin/ar rc libgcc.a $objects /var/lib/laminar/run/glibcbot-alpha-linux-gnu/21/install/compilers/alpha-linux-gnu/alpha-glibc-linux-gnu/bin/ranlib libgcc.a /var/lib/laminar/run/glibcbot-alpha-linux-gnu/21/build/compilers/alpha-linux-gnu/gcc-first/./gcc/xgcc -B/var/lib/laminar/run/glibcbot-alpha-linux-gnu/21/build/compilers/alpha-linux-gnu/gcc-first/./gcc/ -B/var/lib/laminar/run/glibcbot-alpha-linux-gnu/21/install/compilers/alpha-linux-gnu/alpha-glibc-linux-gnu/bin/ -B/var/lib/laminar/run/glibcbot-alpha-linux-gnu/21/install/compilers/alpha-linux-gnu/alpha-glibc-linux-gnu/lib/ -isystem /var/lib/laminar/run/glibcbot-alpha-linux-gnu/21/install/compilers/alpha-linux-gnu/alpha-glibc-linux-gnu/include -isystem /var/lib/laminar/run/glibcbot-alpha-linux-gnu/21/install/compilers/alpha-linux-gnu/alpha-glibc-linux-gnu/sys-include -g -O2 -mieee -O2 -g -O2 -mieee -DIN_GCC -DCROSS_DIRECTORY_STRUCTURE -W -Wall -Wno-narrowing -Wwrite-strings -Wcast-qual -Wstrict-prototypes -Wmissing-prototypes -Wold-style-definition -isystem ./include -fPIC -mieee -mfp-rounding-mode=d -g -DIN_LIBGCC2 -fbuilding-libgcc -fno-stack-protector -Dinhibit_libc -fPIC -mieee -mfp-rounding-mode=d -I. -I. -I../.././gcc -I/var/lib/laminar/run/glibcbot-alpha-linux-gnu/21/src/gcc/libgcc -I/var/lib/laminar/run/glibcbot-alpha-linux-gnu/21/src/gcc/libgcc/. -I/var/lib/laminar/run/glibcbot-alpha-linux-gnu/21/src/gcc/libgcc/../gcc -I/var/lib/laminar/run/glibcbot-alpha-linux-gnu/21/src/gcc/libgcc/../include -DHAVE_CC_TLS -o _gcov_merge_add.o -MT _gcov_merge_add.o -MD -MP -MF _gcov_merge_add.dep -DL_gcov_merge_add -c /var/lib/laminar/run/glibcbot-alpha-linux-gnu/21/src/gcc/libgcc/libgcov-merge.c In file included from /var/lib/laminar/run/glibcbot-alpha-linux-gnu/21/src/gcc/libgcc/libgcov-merge.c:26: /var/lib/laminar/run/glibcbot-alpha-linux-gnu/21/src/gcc/libgcc/libgcov.h:49:10: fatal error: sys/mman.h: No such file or directory 49 | #include <sys/mman.h> | ^~~~~~~~~~~~ compilation terminated. ISTR that it worked without --full-gcc (which enables all languages), so I wonder if I'd try a build round with --disable-gcov and maybe submit a patch for glibc's build-many-glibcs.py?
