# This is an awk script which does dependencies. We do NOT want it to
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# This is an awk script which does dependencies. We do NOT want it to
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# recursively follow #include directives.
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# recursively follow #include directives.
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#
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#
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# The HPATH environment variable should be set to indicate where to look
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# The HPATH environment variable should be set to indicate where to look
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# for include files. The -I in front of the path is optional.
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# for include files. The -I in front of the path is optional.
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#
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#
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# Surely there is a more elegant way to see if a file exists. Anyone know
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# Surely there is a more elegant way to see if a file exists. Anyone know
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# what it is?
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# what it is?
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#
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#
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function fileExists(f, TMP, dummy, result) {
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function fileExists(f, TMP, dummy, result) {
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if(result=FILEHASH[f]) {
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if(result=FILEHASH[f]) {
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if(result=="Yes") {
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if(result=="Yes") {
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return "Yes"
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return "Yes"
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} else {return ""}
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} else {return ""}
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}
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}
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ERRNO = getline dummy < f
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ERRNO = getline dummy < f
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if(ERRNO >= 0) {
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if(ERRNO >= 0) {
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close(f)
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close(f)
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return FILEHASH[f]="Yes"
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return FILEHASH[f]="Yes"
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} else {
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} else {
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FILEHASH[f]="No"
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FILEHASH[f]="No"
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return ""
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return ""
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}
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}
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}
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}
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function endfile(f) {
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function endfile(f) {
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if (hasconfig && !needsconfig) {
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if (hasconfig && !needsconfig) {
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printf "%s doesn't need config\n",f > "/dev/stderr"
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printf "%s doesn't need config\n",f > "/dev/stderr"
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}
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}
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if (hasdep) {
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if (hasdep) {
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print cmd
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print cmd
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}
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}
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}
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}
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BEGIN{
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BEGIN{
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hasdep=0
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hasdep=0
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hasconfig=0
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hasconfig=0
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needsconfig=0
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needsconfig=0
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incomment=0
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incomment=0
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if(!(TOPDIR=ENVIRON["TOPDIR"])) {
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if(!(TOPDIR=ENVIRON["TOPDIR"])) {
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print "Environment variable TOPDIR is not set"
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print "Environment variable TOPDIR is not set"
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exit 1
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exit 1
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}
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}
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split(ENVIRON["HPATH"],parray," ")
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split(ENVIRON["HPATH"],parray," ")
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for(path in parray) {
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for(path in parray) {
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sub("^-I","",parray[path])
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sub("^-I","",parray[path])
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sub("[/ ]*$","",parray[path])
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sub("[/ ]*$","",parray[path])
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}
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}
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}
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}
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# eliminate comments
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# eliminate comments
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{
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{
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# remove all comments fully contained on a single line
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# remove all comments fully contained on a single line
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gsub("\\/\\*.*\\*\\/", "")
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gsub("\\/\\*.*\\*\\/", "")
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if (incomment) {
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if (incomment) {
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if ($0 ~ /\*\//) {
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if ($0 ~ /\*\//) {
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incomment = 0;
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incomment = 0;
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gsub(".*\\*\\/", "")
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gsub(".*\\*\\/", "")
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} else {
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} else {
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next
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next
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}
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}
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} else {
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} else {
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# start of multi-line comment
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# start of multi-line comment
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if ($0 ~ /\/\*/)
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if ($0 ~ /\/\*/)
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{
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{
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incomment = 1;
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incomment = 1;
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sub("\\/\\*.*", "")
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sub("\\/\\*.*", "")
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} else if ($0 ~ /\*\//) {
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} else if ($0 ~ /\*\//) {
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incomment = 0;
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incomment = 0;
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sub(".*\\*\\/", "")
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sub(".*\\*\\/", "")
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}
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}
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}
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}
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}
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}
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/^[ ]*#[ ]*if.*[^A-Za-z_]CONFIG_/ {
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/^[ ]*#[ ]*if.*[^A-Za-z_]CONFIG_/ {
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needsconfig=1
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needsconfig=1
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if (!hasconfig) {
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if (!hasconfig) {
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printf "%s needs config but has not included config file\n",FILENAME > "/dev/stderr"
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printf "%s needs config but has not included config file\n",FILENAME > "/dev/stderr"
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# only say it once per file..
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# only say it once per file..
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hasconfig = 1
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hasconfig = 1
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}
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}
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}
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}
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/^[ ]*#[ ]*include[ ]*[<"][^ ]*[>"]/{
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/^[ ]*#[ ]*include[ ]*[<"][^ ]*[>"]/{
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found=0
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found=0
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if(LASTFILE!=FILENAME) {
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if(LASTFILE!=FILENAME) {
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endfile(LASTFILE)
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endfile(LASTFILE)
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hasdep=0
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hasdep=0
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hasconfig=0
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hasconfig=0
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needsconfig=0
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needsconfig=0
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incomment=0
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incomment=0
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cmd=""
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cmd=""
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LASTFILE=FILENAME
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LASTFILE=FILENAME
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depname=FILENAME
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depname=FILENAME
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relpath=FILENAME
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relpath=FILENAME
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sub("\\.c$",".o: ",depname)
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sub("\\.c$",".o: ",depname)
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sub("\\.S$",".o: ",depname)
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sub("\\.S$",".o: ",depname)
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if (depname==FILENAME) {
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if (depname==FILENAME) {
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cmd="\n\t@touch "depname
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cmd="\n\t@touch "depname
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}
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}
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sub("\\.h$",".h: ",depname)
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sub("\\.h$",".h: ",depname)
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if(relpath ~ "^\\." ) {
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if(relpath ~ "^\\." ) {
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sub("[^/]*$","", relpath)
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sub("[^/]*$","", relpath)
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relpath=relpath"/"
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relpath=relpath"/"
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sub("//","/", relpath)
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sub("//","/", relpath)
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} else {
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} else {
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relpath=""
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relpath=""
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}
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}
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}
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}
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fname=$0
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fname=$0
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sub("^#[ ]*include[ ]*[<\"]","",fname)
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sub("^#[ ]*include[ ]*[<\"]","",fname)
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sub("[>\"].*","",fname)
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sub("[>\"].*","",fname)
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if (fname=="linux/config.h") {
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if (fname=="linux/config.h") {
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hasconfig=1
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hasconfig=1
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}
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}
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rfname=relpath""fname
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rfname=relpath""fname
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if(fileExists(rfname)) {
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if(fileExists(rfname)) {
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found=1
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found=1
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if (!hasdep) {
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if (!hasdep) {
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printf "%s", depname
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printf "%s", depname
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}
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}
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hasdep=1
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hasdep=1
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printf " \\\n %s", rfname
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printf " \\\n %s", rfname
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if(fname ~ "^\\." ) {
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if(fname ~ "^\\." ) {
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fnd=0;
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fnd=0;
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for(i in ARGV) {
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for(i in ARGV) {
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if(ARGV[i]==rfname) {
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if(ARGV[i]==rfname) {
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fnd=1
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fnd=1
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}
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}
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}
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}
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if(fnd==0) {
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if(fnd==0) {
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ARGV[ARGC]=rfname
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ARGV[ARGC]=rfname
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++ARGC
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++ARGC
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}
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}
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}
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}
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} else {
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} else {
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for(path in parray) {
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for(path in parray) {
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if(fileExists(parray[path]"/"fname)) {
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if(fileExists(parray[path]"/"fname)) {
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shortp=parray[path]
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shortp=parray[path]
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found=1
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found=1
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if (!hasdep) {
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if (!hasdep) {
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printf "%s", depname
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printf "%s", depname
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}
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}
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hasdep=1
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hasdep=1
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printf " \\\n %s", parray[path]"/"fname
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printf " \\\n %s", parray[path]"/"fname
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}
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}
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}
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}
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}
|
}
|
}
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}
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|
END{
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END{
|
endfile(FILENAME)
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endfile(FILENAME)
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}
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}
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