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Diffstat (limited to 'mcon/U/Findhdr.U')
| -rw-r--r-- | mcon/U/Findhdr.U | 106 |
1 files changed, 106 insertions, 0 deletions
diff --git a/mcon/U/Findhdr.U b/mcon/U/Findhdr.U new file mode 100644 index 0000000..48d4d75 --- /dev/null +++ b/mcon/U/Findhdr.U @@ -0,0 +1,106 @@ +?RCS: $Id: Findhdr.U,v 3.0.1.2 1994/10/29 15:53:08 ram Exp $ +?RCS: +?RCS: Copyright (c) 1991-1993, Raphael Manfredi +?RCS: +?RCS: You may redistribute only under the terms of the Artistic Licence, +?RCS: as specified in the README file that comes with the distribution. +?RCS: You may reuse parts of this distribution only within the terms of +?RCS: that same Artistic Licence; a copy of which may be found at the root +?RCS: of the source tree for dist 3.0. +?RCS: +?RCS: Original Author: Thomas Neumann <tom@smart.bo.open.de> +?RCS: +?RCS: $Log: Findhdr.U,v $ +?RCS: Revision 3.0.1.2 1994/10/29 15:53:08 ram +?RCS: patch36: added ?F: line for metalint file checking +?RCS: +?RCS: Revision 3.0.1.1 1994/05/06 14:03:56 ram +?RCS: patch23: cppminus must be after other cppflags, not before +?RCS: +?RCS: Revision 3.0 1993/08/18 12:04:54 ram +?RCS: Baseline for dist 3.0 netwide release. +?RCS: +?X: +?X: This unit produces a findhdr script which is used to locate the header +?X: files in $usrinc or other stranger places using cpp capabilities. The +?X: script is given an include file base name, like 'stdio.h' or 'sys/file.h' +?X: and it returns the full path of the include file and a zero status or an +?X: empty string with an error status if the file could not be located. +?X: +?MAKE:Findhdr: grep test tr rm +usrinc awk cat startsh \ + cppstdin cppminus +cppflags +?MAKE: -pick add $@ %< +?LINT:define fieldn +?S:fieldn: +?S: This variable is used internally by Configure. It contains the position +?S: of the included file name in cpp output. That is to say, when cpp +?S: pre-processes a #include <file> line, it replaces it by a # line which +?S: contains the original position in the input file and the full name of +?S: included file, between "quotes". +?S:. +?V:fieldn +?F:./findhdr !fieldn +?T:cline pos wanted name awkprg +: determine filename position in cpp output +echo " " +echo "Computing filename position in cpp output for #include directives..." >&4 +echo '#include <stdio.h>' > foo.c +$cat >fieldn <<EOF +$startsh +$cppstdin $cppflags $cppminus <foo.c 2>/dev/null | \ +$grep '^[ ]*#.*stdio\.h' | \ +while read cline; do + pos=1 + set \$cline + while $test \$# -gt 0; do + if $test -r \`echo \$1 | $tr -d '"'\`; then + echo "\$pos" + exit 0 + fi + shift + pos=\`expr \$pos + 1\` + done +done +EOF +chmod +x fieldn +fieldn=`./fieldn` +$rm -f foo.c fieldn +case $fieldn in +'') pos='???';; +1) pos=first;; +2) pos=second;; +3) pos=third;; +*) pos="${fieldn}th";; +esac +echo "Your cpp writes the filename in the $pos field of the line." + +?X: To locate a header file, we cannot simply check for $usrinc/file.h, since +?X: some machine have the headers in weird places and our only hope is that +?X: the C pre-processor will know how to find those headers. Thank you NexT! +: locate header file +$cat >findhdr <<EOF +$startsh +wanted=\$1 +name='' +if test -f $usrinc/\$wanted; then + echo "$usrinc/\$wanted" + exit 0 +fi +awkprg='{ print \$$fieldn }' +echo "#include <\$wanted>" > foo\$\$.c +$cppstdin $cppminus $cppflags < foo\$\$.c 2>/dev/null | \ +$grep "^[ ]*#.*\$wanted" | \ +while read cline; do + name=\`echo \$cline | $awk "\$awkprg" | $tr -d '"'\` + case "\$name" in + */\$wanted) echo "\$name"; exit 0;; + *) name='';; + esac; +done; +$rm -f foo\$\$.c; +case "\$name" in +'') exit 1;; +esac +EOF +chmod +x findhdr + |