1 ?RCS: $Id: Findhdr.U,v 3.0.1.2 1994/10/29 15:53:08 ram Exp $
3 ?RCS: Copyright (c) 1991-1993, Raphael Manfredi
5 ?RCS: You may redistribute only under the terms of the Artistic License,
6 ?RCS: as specified in the README file that comes with the distribution.
7 ?RCS: You may reuse parts of this distribution only within the terms of
8 ?RCS: that same Artistic License; a copy of which may be found at the root
9 ?RCS: of the source tree for dist 3.0.
11 ?RCS: Original Author: Thomas Neumann <tom@smart.bo.open.de>
13 ?RCS: $Log: Findhdr.U,v $
14 ?RCS: Revision 3.0.1.2 1994/10/29 15:53:08 ram
15 ?RCS: patch36: added ?F: line for metalint file checking
17 ?RCS: Revision 3.0.1.1 1994/05/06 14:03:56 ram
18 ?RCS: patch23: cppminus must be after other cppflags, not before
20 ?RCS: Revision 3.0 1993/08/18 12:04:54 ram
21 ?RCS: Baseline for dist 3.0 netwide release.
24 ?X: This unit produces a findhdr script which is used to locate the header
25 ?X: files in $usrinc or other stranger places using cpp capabilities. The
26 ?X: script is given an include file base name, like 'stdio.h' or 'sys/file.h'
27 ?X: and it returns the full path of the include file and a zero status or an
28 ?X: empty string with an error status if the file could not be located.
30 ?MAKE:Findhdr: grep test tr rm incpth awk cat startsh \
31 cppstdin cppminus +cppflags osname
32 ?MAKE: -pick add $@ %<
33 ?LINT:extern cppfilter
36 ?S: This variable is used internally by Configure. It contains the position
37 ?S: of the included file name in cpp output. That is to say, when cpp
38 ?S: pre-processes a #include <file> line, it replaces it by a # line which
39 ?S: contains the original position in the input file and the full name of
40 ?S: included file, between "quotes".
44 ?T:cline pos wanted name awkprg usrincdir status testaccess
45 : determine filename position in cpp output
47 echo "Computing filename position in cpp output for #include directives..." >&4
49 amigaos) fieldn=3 ;; # Workaround for a bug in abc (pdksh).
57 echo '#include <stdio.h>' > foo.c
60 $cppstdin $cppflags $cppminus <foo.c 2>/dev/null | \
61 $grep '^[ ]*#.*stdio\.h' | \
65 while $test \$# -gt 0; do
66 if $test $testaccess \`echo \$1 | $tr -d '"'\`; then
71 pos=\`expr \$pos + 1\`
85 *) pos="${fieldn}th";;
87 echo "Your cpp writes the filename in the $pos field of the line."
89 ?X: To locate a header file, we cannot simply check for $usrinc/file.h, since
90 ?X: some machine have the headers in weird places and our only hope is that
91 ?X: the C pre-processor will know how to find those headers. Thank you NexT!
97 for usrincdir in $incpth
99 if test -f \$usrincdir/\$wanted; then
100 echo "\$usrincdir/\$wanted"
104 awkprg='{ print \$$fieldn }'
105 echo "#include <\$wanted>" > foo\$\$.c
106 $cppstdin $cppminus $cppflags < foo\$\$.c 2>/dev/null | \
107 $cppfilter $grep "^[ ]*#.*\$wanted" | \
109 name=\`echo \$cline | $awk "\$awkprg" | $tr -d '"'\`
111 *[/\\\\]\$wanted) echo "\$name"; exit 1;;
112 *[\\\\/]\$wanted) echo "\$name"; exit 1;;
117 # status = 0: grep returned 0 lines, case statement not executed
118 # status = 1: headerfile found
119 # status = 2: while loop executed, no headerfile found
123 if test \$status -eq 1; then