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[/] [or1k/] [trunk/] [uclinux/] [uClinux-2.0.x/] [scripts/] [depend.awk] - Blame information for rev 1767

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Line No. Rev Author Line
1 199 simons 
# 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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#
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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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#
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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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#
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function fileExists(f,    TMP, dummy, result) {
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        if(result=FILEHASH[f]) {
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                if(result=="Yes") {
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                        return "Yes"
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                } else {return ""}
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        }
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        ERRNO = getline dummy < f
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        if(ERRNO >= 0) {
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                close(f)
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                return FILEHASH[f]="Yes"
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        } else {
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                FILEHASH[f]="No"
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                return ""
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        }
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}
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function endfile(f) {
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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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        }
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        if (hasdep) {
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                print cmd
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        }
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}
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BEGIN{
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        hasdep=0
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        hasconfig=0
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        needsconfig=0
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        incomment=0
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        if(!(TOPDIR=ENVIRON["TOPDIR"])) {
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                print "Environment variable TOPDIR is not set"
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                exit 1
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        }
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        split(ENVIRON["HPATH"],parray," ")
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        for(path in parray) {
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            sub("^-I","",parray[path])
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            sub("[/ ]*$","",parray[path])
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        }
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}
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# eliminate comments
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{
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    # remove all comments fully contained on a single line
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        gsub("\\/\\*.*\\*\\/", "")
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        if (incomment) {
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                if ($0 ~ /\*\//) {
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                        incomment = 0;
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                        gsub(".*\\*\\/", "")
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                } else {
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                        next
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                }
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        } else {
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                # start of multi-line comment
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                if ($0 ~ /\/\*/)
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                {
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                        incomment = 1;
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                        sub("\\/\\*.*", "")
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                } else if ($0 ~ /\*\//) {
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                        incomment = 0;
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                        sub(".*\\*\\/", "")
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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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        needsconfig=1
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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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                # only say it once per file..
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                hasconfig = 1
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        }
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}
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/^[     ]*#[    ]*include[      ]*[<"][^        ]*[>"]/{
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        found=0
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        if(LASTFILE!=FILENAME) {
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                endfile(LASTFILE)
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                hasdep=0
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                hasconfig=0
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                needsconfig=0
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                incomment=0
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                cmd=""
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                LASTFILE=FILENAME
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                depname=FILENAME
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                relpath=FILENAME
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                sub("\\.c$",".o: ",depname)
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                sub("\\.S$",".o: ",depname)
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                if (depname==FILENAME) {
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                        cmd="\n\t@touch "depname
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                }
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                sub("\\.h$",".h: ",depname)
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                if(relpath ~ "^\\." ) {
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                        sub("[^/]*$","",  relpath)
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                        relpath=relpath"/"
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                        sub("//","/",  relpath)
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                } else {
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                        relpath=""
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                }
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        }
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        fname=$0
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        sub("^#[        ]*include[      ]*[<\"]","",fname)
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        sub("[>\"].*","",fname)
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        if (fname=="linux/config.h") {
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                hasconfig=1
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        }
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        rfname=relpath""fname
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        if(fileExists(rfname)) {
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                found=1
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                if (!hasdep) {
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                        printf "%s", depname
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                }
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                hasdep=1
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                printf " \\\n   %s", rfname
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                if(fname ~ "^\\." ) {
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                        fnd=0;
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                        for(i in ARGV) {
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                                if(ARGV[i]==rfname) {
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                                        fnd=1
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                                }
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                        }
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                        if(fnd==0) {
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                                ARGV[ARGC]=rfname
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                                ++ARGC
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                        }
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                }
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        } else {
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                for(path in parray) {
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                        if(fileExists(parray[path]"/"fname)) {
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                                shortp=parray[path]
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                                found=1
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                                if (!hasdep) {
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                                        printf "%s", depname
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                                }
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                                hasdep=1
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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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END{
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        endfile(FILENAME)
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}

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