https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98281
--- Comment #1 from ishikawa,chiaki <ishikawa at yk dot rim.or.jp> --- The command to compile the source file uploaded. (Place it in /tmp) cd tmp export TERM=dumb /usr/bin/gcc-10 -std=gnu99 -o /tmp/Unified_c_libical_src_libical1.o -c -I/NEW-SSD/moz-obj-dir/objdir-tb3/dist/system_wrappers -include /NEW-SSD/NREF-COMM-CENTRAL/mozilla/config/gcc_hidden.h -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 -fstack-protector-strong -DDEBUG=1 -DHAVE_CONFIG_H -DHAVE_SNPRINTF -DMOZ_HAS_MOZGLUE -DMOZILLA_INTERNAL_API -DIMPL_LIBXUL -DSTATIC_EXPORTABLE_JS_API -I/NEW-SSD/NREF-COMM-CENTRAL/mozilla/comm/calendar/libical/src/libical -I/NEW-SSD/moz-obj-dir/objdir-tb3/comm/calendar/libical/src/libical -I/NEW-SSD/NREF-COMM-CENTRAL/mozilla/comm/calendar/libical -I/NEW-SSD/moz-obj-dir/objdir-tb3/dist/include -I/NEW-SSD/moz-obj-dir/objdir-tb3/dist/include/nspr -I/NEW-SSD/moz-obj-dir/objdir-tb3/dist/include/nss -fPIC -include /NEW-SSD/moz-obj-dir/objdir-tb3/mozilla-config.h -DMOZILLA_CLIENT -fno-builtin-strlen -Wl,--gdb-index -Dfdatasync=fdatasync -DDEBUG_4GB_CHECK -DUSEHELGRIND=1 -DUSEVALGRIND=1 -DDEBUG -g -gsplit-dwarf -Werror=sign-compare -Werror=unused-result -Werror=unused-variable -Werror=format -fuse-ld=gold -fno-strict-aliasing -ffunction-sections -fdata-sections -fno-math-errno -pthread -pipe -g -g -Og -fvar-tracking -gdwarf-4 -fvar-tracking-assignments -freorder-blocks -fno-omit-frame-pointer -funwind-tables -Wall -Wempty-body -Wignored-qualifiers -Wpointer-arith -Wsign-compare -Wtype-limits -Wunreachable-code -Wduplicated-cond -Wno-error=maybe-uninitialized -Wno-error=deprecated-declarations -Wno-error=array-bounds -Wno-error=coverage-mismatch -Wno-error=free-nonheap-object -Wno-multistatement-macros -Wno-error=class-memaccess -Wno-error=deprecated-copy -Wformat -Wformat-overflow=2 -Werror=implicit-function-declaration -Wno-psabi -MD -MP -MF .deps/Unified_c_libical_src_libical1.o.pp Unified_c_libical_src_libical1.c We get the following error at the end, but please ignore it. Unified_c_libical_src_libical1.c: At top level: Unified_c_libical_src_libical1.c:48: fatal error: opening dependency file .deps/Unified_c_libical_src_libical1.o.pp: No such file or directory 48 | #pragma GCC visibility pop