tdo full dependency graph using libraries too. adds a solid .1 seconds of time when including a ridiculous number of libraries, but linking is so fast compared to compiling that it's hardly noticeable. - plan9port - [fork] Plan 9 from user space
(HTM) git clone git://src.adamsgaard.dk/plan9port
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---
(DIR) commit 3d637e16282987774a99b45ee01ded3de4d78a58
(DIR) parent 6b4c8671dea86b80421eb1f351fa6a2435216d79
(HTM) Author: rsc <devnull@localhost>
Date: Fri, 7 Jan 2005 06:40:17 +0000
do full dependency graph using libraries too.
adds a solid .1 seconds of time when including
a ridiculous number of libraries, but linking
is so fast compared to compiling that it's hardly
noticeable.
Diffstat:
M bin/9l | 143 ++++++++++++++++++-------------
1 file changed, 83 insertions(+), 60 deletions(-)
---
(DIR) diff --git a/bin/9l b/bin/9l
t@@ -2,20 +2,20 @@
libsl=""
-doautolib=1
-verbose=0
+doautolib=true
+verbose=false
if [ "x$1" = "x-l" ]
then
shift
- doautolib=0
+ doautolib=false
elif [ "x$1" = "x-v" ]
then
shift
- verbose=1
+ verbose=true
fi
-if [ $doautolib = 1 ]
+if $doautolib
then
ofiles=""
for i
t@@ -31,76 +31,99 @@ then
autolibs=""
if [ "x$ofiles" != "x" ]
then
- autolibs=`
+ a=`
nm $ofiles |
grep '__p9l_autolib_[a-zA-Z0-9+-]*$' |
sed 's/.* __p9l_autolib_//' |
sort -u
`
+ for i in $a
+ do
+ autolibs="$autolibs $i"
+ eval "need$i=true"
+ done
fi
- # echo "autolibs $autolibs"
-
- libsl=""
- special="mp draw 9pclient mux thread bio" # order matters
- for i in $special
+
+ # fetch dependencies out of libraries
+ workq="$autolibs"
+ while [ "x$workq" != "x" ]
do
- eval "need$i=0"
+ w="$workq"
+ workq=""
+ for i in $w
+ do
+ a=`
+ nm $PLAN9/lib/lib$i.a |
+ grep '__p9l_autolib_[a-zA-Z0-9+-]*$' |
+ sed 's/.*__p9l_autolib_//' |
+ sort -u
+ `
+ okayfn="true"
+ for j in $a
+ do
+ if eval "[ x\$need$j = x ]"
+ then
+ autolibs="$autolibs $j"
+ workq="$workq $j"
+ eval "need$j=true"
+ fi
+ if [ $j != $i ]
+ then
+ okayfn="$okayfn && have$j"
+ fi
+ done
+ # echo "can$i: $okayfn"
+ eval "can$i() { $okayfn; }"
+ done
done
-
+ if $verbose
+ then
+ echo "autolibs $autolibs"
+ fi
+
for i in $autolibs
do
- case "$i" in
- 9pclient)
- need9pclient=1
- needmux=1
- needthread=1
- ;;
- bio)
- needbio=1
- ;;
- draw)
- needdraw=1
- ;;
- mp)
- needmp=1
- ;;
- mux)
- needmux=1
- needthread=1
- ;;
- plumb)
- need9pclient=1
- needmux=1
- needthread=1
- libsl="$libsl -lplumb"
- ;;
- sec)
- needmp=1
- libsl="$libsl -lsec"
- ;;
- thread)
- needthread=1
- ;;
- venti)
- libsl="$libsl -lventi"
- needthread=1
- ;;
- *)
- libsl="$libsl -l$i"
- ;;
- esac
+ eval "have$i() { false; }"
done
-
- for i in $special
+
+ # now find correct order
+ libsl=""
+ while [ "x$autolibs" != x ]
do
- if eval "[ \$need$i = 1 ]"
+ stillneed=""
+ didnothing=true
+ for i in $autolibs
+ do
+ if eval "can$i"
+ then
+ libsl="-l$i $libsl"
+ eval "have$i() { true; }"
+ didnothing=false
+ else
+ stillneed="$stillneed $i"
+ fi
+ done
+ # break cycle by setting the last library on the list
+ # to have no dependencies
+ if $didnothing
then
- libsl="$libsl -l$i"
+ j="xxx"
+ for i in $autolibs
+ do
+ j=$i
+ done
+ echo "dependency cycle: $autolibs; breaking with $j"
+ eval "can$j() { true; }"
fi
+ autolibs="$stillneed"
done
+ if $verbose
+ then
+ echo "liborder $libsl"
+ fi
libsl="$libsl -l9"
-
- if [ $needdraw = 1 ]
+
+ if [ "x$needdraw" = xtrue ]
then
if [ "x$X11" = "x" ]
then
t@@ -146,7 +169,7 @@ case "$tag" in
exit 1
esac
-if [ $verbose = 1 ]
+if $verbose
then
echo $ld -L$PLAN9/lib "$@" $libsl $extralibs
fi