So, in this thread a few days ago i reported that the
list of arguments passed to mkdep can become quite large
and exceed kern.argmax, especially if your sources are not in the
default place and you are compiling a file with lots of options
such as LINT.

The place to fix (for -current) is sys/conf/, and
as Alfred suggested, a fix involves using xargs (mkdep is already
invoked with -a). Unfortunately it is not entirely trivial because
the variable containing the argument list is a Make variable, and
any attempt to expand it in a command will result in the "Argument
list too long" error.

The best I could come up with is the following (modulo cut&paste
conversion of tabs in spaces), i.e. use make's .for to
copy the list of files into a file that we can then pass
to xargs.

Any better ideas ?


RCS file: /home/ncvs/src/sys/conf/,v
retrieving revision 1.4
diff -u -r1.4
---        2001/11/11 06:16:53     1.4
+++        2002/02/21 04:49:26
@@ -89,10 +89,28 @@
            ${SYSTEM_SFILES} ${MFILES:T:S/.m$/.h/}
        if [ -f .olddep ]; then mv .olddep .depend; fi
        rm -f .newdep
-       env MKDEP_CPP="${CC} -E" CC="${CC}" \
-           mkdep -a -f .newdep ${CFLAGS} ${CFILES} ${SYSTEM_CFILES} ${GEN_CFILE
-       env MKDEP_CPP="${CC} -E" \
-           mkdep -a -f .newdep ${ASM_CFLAGS} ${SFILES} ${SYSTEM_SFILES}
+       #
+       # The argument list can be very long, and the only way we have to
+       # split it is within make because anything else will cause
+       # an exec error if the list is too long!
+       rm -f .args
+               @echo -n "$I " >> .args
+       echo "" >> .args
+       echo "args len is " ; wc .args
+       # argument list...
+       cat .args | xargs env MKDEP_CPP="${CC} -E" CC="${CC}" \
+           mkdep -a -f .newdep ${CFLAGS}
+       rm -f .args
+               @echo -n "$I " >> .args
+       echo "" >> .args
+       echo "args len is " ; wc .args
+       cat .args | xargs env MKDEP_CPP="${CC} -E" \
+           mkdep -a -f .newdep ${ASM_CFLAGS}
+       rm -f .args
        rm -f .depend
        mv .newdep .depend

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