Apparently the number files in kern is on the hairy edge of ARG_MAX on
openbsd 6.6-current amd64. If I run the same command in /usr/src, it works
making the problem easy to ignore until more files are added.
Should ctags grow an option to take a list of inputs from a file or is -a
smart enough to be used with xagrs to resolve this problem?
cd /home/greg/s/src/sys/kern; make tags
...
TDIR=`mktemp -d /tmp/_tagXXXXXXXXXX` || exit 1; eval
"S=/home/greg/s/src/sys/arch/amd64/../.." && config -s
/home/greg/s/src/sys/arch/amd64/../.. -b ${TDIR}
/home/greg/s/src/sys/arch/amd64/conf/GENERIC.MP && eval "_arch=\"`make -V
_arch -f ${TDIR}/Makefile`\"" && eval "_mach=\"`make -V _mach -f
${TDIR}/Makefile`\"" && eval
"_machdir=\/home/greg/s/src/sys/arch/amd64/../../arch/${_mach}" && eval
"_archdir=\/home/greg/s/src/sys/arch/amd64/../../arch/${_arch}" && eval
"HFILES=\"`find /home/greg/s/src/sys/arch/amd64/../.. \( -path
/home/greg/s/src/sys/arch/amd64/../../'arch' -o -path
/home/greg/s/src/sys/arch/amd64/../../stand -o -path
/home/greg/s/src/sys/arch/amd64/../../lib/libsa -o -path
/home/greg/s/src/sys/arch/amd64/../..'/lib/libkern/arch' \) -prune -o -name
'*.h'; find ${_machdir} ${_archdir}
/home/greg/s/src/sys/arch/amd64/../../lib/libkern/arch/${_mach} \( -name
boot -o -name stand \) -prune -o -name '*.h'`\"" && eval "SFILES=\"`make
-V SFILES -f ${TDIR}/Makefile`\"" && eval "CFILES=\"`make -V CFILES -f
${TDIR}/Makefile`\"" && eval "AFILES=\"`make -V AFILES -f
${TDIR}/Makefile`\"" && ctags -wd -f /home/greg/s/src/sys/arch/amd64/tags
${CFILES} ${HFILES} && egrep "^[_A-Z]*ENTRY[_A-Z]*\(.*\)" ${SFILES}
${AFILES} | sed "s;\\([^:]*\\):\\([^(]*\\)(\\([^, )]*\\)\\(.*\\);\\3 \\1
/^\\2(\\3\\4$/;" >> /home/greg/s/src/sys/arch/amd64/tags && sort -o
/home/greg/s/src/sys/arch/amd64/tags /home/greg/s/src/sys/arch/amd64/tags
&& rm -rf ${TDIR}
/bin/sh: ctags: Argument list too long
*** Error 1 in arch/amd64 (Makefile:42 'tags')
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