> 2) Where is the Makefile source for each command that gets executed? > For each command that gets executed, print not only the command (or > nothing if the line begins with '@'), but also the location (which > Makefile, which line number). > > This would help in a number of situations. > > I tried -d a couple of times, and it produced a ton of output, that > was too much for me to make sense of. Probably 10% to 20% of the > developers in general have trace filtering skills, that is, know how > to extract the essential information from a heap of output. It's not > part of my skills.
Just learned about the '--trace' option and I have two comments: * It should be described in a chapter "Troubleshooting". Mentioning it in section "Summary of Options" is not enough. * Some of its output is good; some of its output is useless: $ rm mbrtoc32.o $ make --trace mbrtoc32.o Makefile:1752: update target 'mbrtoc32.o' due to: ../../gllib/mbrtoc32.c /usr/include/stdc-predef.h ../config.h /usr/lib/gcc/x86_64-linux-gnu/11/include/stdbool.h /usr/include/assert.h /usr/include/features.h /usr/include/features-time64.h /usr/include/x86_64-linux-gnu/bits/wordsize.h /usr/include/x86_64-linux-gnu/bits/timesize.h /usr/include/x86_64-linux-gnu/sys/cdefs.h /usr/include/x86_64-linux-gnu/bits/long-double.h /usr/include/x86_64-linux-gnu/gnu/stubs.h /usr/include/x86_64-linux-gnu/gnu/stubs-64.h uchar.h /usr/include/uchar.h stddef.h /usr/lib/gcc/x86_64-linux-gnu/11/include/stddef.h /usr/include/x86_64-linux-gnu/bits/types.h /usr/include/x86_64-linux-gnu/bits/typesizes.h /usr/include/x86_64-linux-gnu/bits/time64.h /usr/include/x86_64-linux-gnu/bits/types/mbstate_t.h /usr/include/x86_64-linux-gnu/bits/types/__mbstate_t.h /usr/lib/gcc/x86_64-linux-gnu/11/include/stdint.h /usr/include/stdint.h /usr/include/x86_64-linux-gnu/bits/libc-header-start.h /usr/include/x86_64-linux-gnu/bits/wchar.h /usr/include/x86_64-linux-gnu/bits/stdint-intn.h /usr/include/x86_64-linux-gnu/bits/stdint-uintn.h wchar.h /usr/include/wchar.h /usr/include/x86_64-linux-gnu/bits/floatn.h /usr/include/x86_64-linux-gnu/bits/floatn-common.h /usr/lib/gcc/x86_64-linux-gnu/11/include/stdarg.h /usr/include/x86_64-linux-gnu/bits/types/wint_t.h /usr/include/x86_64-linux-gnu/bits/types/__FILE.h /usr/include/x86_64-linux-gnu/bits/types/FILE.h /usr/include/x86_64-linux-gnu/bits/types/locale_t.h /usr/include/x86_64-linux-gnu/bits/types/__locale_t.h /usr/include/x86_64-linux-gnu/bits/wchar2.h /usr/include/string.h /usr/include/strings.h /usr/include/x86_64-linux-gnu/bits/strings_fortified.h /usr/include/x86_64-linux-gnu/bits/string_fortified.h /usr/include/wctype.h /usr/include/x86_64-linux-gnu/bits/wctype-wchar.h /usr/include/x86_64-linux-gnu/bits/endian.h /usr/include/x86_64-linux-gnu/bits/endianness.h ../../gllib/attribute.h /usr/include/errno.h /usr/include/x86_64-linux-gnu/bits/errno.h /usr/include/linux/errno.h /usr/include/x86_64-linux-gnu/asm/errno.h /usr/include/asm-generic/errno.h /usr/include/asm-generic/errno-base.h /usr/include/x86_64-linux-gnu/bits/types/error_t.h stdlib.h /usr/include/stdlib.h /usr/include/x86_64-linux-gnu/bits/waitflags.h /usr/include/x86_64-linux-gnu/bits/waitstatus.h sys/types.h /usr/include/x86_64-linux-gnu/sys/types.h /usr/include/x86_64-linux-gnu/bits/types/clock_t.h /usr/include/x86_64-linux-gnu/bits/types/clockid_t.h /usr/include/x86_64-linux-gnu/bits/types/time_t.h /usr/include/x86_64-linux-gnu/bits/types/timer_t.h /usr/include/endian.h /usr/include/x86_64-linux-gnu/bits/byteswap.h /usr/include/x86_64-linux-gnu/bits/uintn-identity.h /usr/include/x86_64-linux-gnu/sys/select.h /usr/include/x86_64-linux-gnu/bits/select.h /usr/include/x86_64-linux-gnu/bits/types/sigset_t.h /usr/include/x86_64-linux-gnu/bits/types/__sigset_t.h /usr/include/x86_64-linux-gnu/bits/types/struct_timeval.h /usr/include/x86_64-linux-gnu/bits/types/struct_timespec.h /usr/include/x86_64-linux-gnu/bits/select2.h /usr/include/x86_64-linux-gnu/bits/pthreadtypes.h /usr/include/x86_64-linux-gnu/bits/thread-shared-types.h /usr/include/x86_64-linux-gnu/bits/pthreadtypes-arch.h /usr/include/x86_64-linux-gnu/bits/atomic_wide_counter.h /usr/include/x86_64-linux-gnu/bits/struct_mutex.h /usr/include/x86_64-linux-gnu/bits/struct_rwlock.h /usr/include/alloca.h /usr/include/x86_64-linux-gnu/bits/stdlib-bsearch.h /usr/include/x86_64-linux-gnu/bits/stdlib-float.h /usr/include/x86_64-linux-gnu/bits/stdlib.h ../../gllib/localcharset.h ../../gllib/streq.h ../../gllib/hard-locale.h locale.h /usr/include/locale.h /usr/include/x86_64-linux-gnu/bits/locale.h ../../gllib/setlocale_null.h ../../gllib/arg-nonnull.h gcc -ftrapv -DHAVE_CONFIG_H -I. -I../../gllib -I.. -DGNULIB_STRICT_CHECKING=1 -I/media/develdata/devel/inst-x86_64-64/include -Wall -g -O2 -MT mbrtoc32.o -MD -MP -MF .deps/mbrtoc32.Tpo -c -o mbrtoc32.o ../../gllib/mbrtoc32.c mv -f .deps/mbrtoc32.Tpo .deps/mbrtoc32.Po The part "Makefile:1752" is essential. It could be highlighted in some way. The two last lines (expanded commands, despite use of '@') are essential as well. The " due to: <huge list of files>" is useless, since these files have not changed since the last compilation. (Suggestion: Reduce this list by showing only the file with the newest timestamp. Files with older timestamps are redundant.) The important fact is that the file mbrtoc32.o does not exist; the output should mention this. Bruno
