1#!/bin/sh
2# check-each-file
3# Used to narrow down a miscompilation to one .o file from a list. Please read
4# the usage procedure, below, for command-line syntax (or run it with --help).
5# This script depends on the llvm-native-gcc script.
6
7if [ x$1 = x--make-linker-script ]
8then
9	program=$2
10	linker=./link-$program
11	echo "Building $program with llvm-native-gcc"
12	rm -f $program
13	gmake -e $program CC=llvm-native-gcc CXX=llvm-native-gxx
14	echo "Erasing $program and re-linking it" 
15	rm -f $program
16	echo "rm -f $program" > $linker
17	gmake -n $program >> $linker
18	chmod 755 $linker
19	echo "Linker script created in $linker; testing it out"
20	output=`./$linker 2>&1`
21	case "$output" in
22		*undefined*reference*__main*) 
23			echo "$program appears to need a dummy __main function; adding one"
24			echo "void __main () { }" > __main.c
25			gcc -c __main.c
26			echo "Done; rebuilding $linker"
27			echo "rm -f $program" > $linker
28			gmake -n $program 2>&1 | sed '/gcc/s/$/__main.o/' >> $linker
29			./$linker > /dev/null 2>&1
30			if [ ! -x $program ]
31			then
32				echo "WARNING: linker script didn't work"
33			fi
34			;;
35		*)
36			if [ ! -x $program ]
37			then
38				echo "WARNING: linker script didn't work"
39			fi
40			;;
41	esac
42	echo "Linker script created in $linker; please check it manually"
43	exit 0
44fi
45
46checkfiles="$1"
47program="$2"
48linker="$3"
49checker="$4"
50
51usage () {
52	myname=`basename $0`
53	echo "$myname --make-linker-script PROGRAM"
54	echo "$myname OBJECTS-FILE PROGRAM LINKER CHECKER"
55	echo ""
56	echo "OBJECTS-FILE is a text file containing the names of all the .o files"
57	echo "PROGRAM is the name of the executable under test"
58	echo "(there must also exist a Makefile in the current directory which"
59	echo "has PROGRAM as a target)"
60	echo "LINKER is the script that builds PROGRAM; try --make-linker-script" 
61	echo "to automatically generate it"
62	echo "CHECKER is the script that exits 0 if PROGRAM is ok, 1 if it is not OK"
63	echo "(LINKER and CHECKER must be in your PATH, or you should specify ./)"
64	echo ""
65	echo "Bugs to <gaeke@uiuc.edu>."
66	exit 1
67}
68
69if [ x$1 = x--help ]
70then
71	usage
72fi
73
74if [ -z "$checkfiles" ]
75then
76	echo "ERROR: Must specify name of file w/ list of objects as 1st arg."
77	echo "(got \"$checkfiles\")"
78	usage
79fi
80if [ ! -f "$checkfiles" ]
81then
82	echo "ERROR: $checkfiles not found"
83	usage
84fi
85if [ -z "$program" ]
86then
87	echo "ERROR: Must specify name of program as 2nd arg."
88	usage
89fi
90if [ -z "$linker" ]
91then
92	echo "ERROR: Must specify name of link script as 3rd arg."
93	usage
94fi
95if [ ! -x "$linker" ]
96then
97	echo "ERROR: $linker not found or not executable"
98	echo "You may wish to try: $0 --make-linker-script $program"
99	usage
100fi
101if [ -z "$checker" ]
102then
103	echo "ERROR: Must specify name of $program check script as 3rd arg."
104	usage
105fi
106if [ ! -x "$checker" ]
107then
108	echo "ERROR: $checker not found or not executable"
109	usage
110fi
111
112files=`cat $checkfiles`
113echo "Recompiling everything with llvm-native-gcc"
114for f in $files
115do
116	rm -f $f
117	gmake $f CC=llvm-native-gcc CXX=llvm-native-gxx
118done
119rm -f $program
120$linker
121if $checker
122then
123	echo "Sorry, I can't help you, $program is OK when compiled with llvm-native-gcc"
124	exit 1
125fi
126for f in $files
127do
128	echo Trying to compile $f with native gcc and rebuild $program
129	mv ${f} ${f}__OLD__
130	gmake ${f} CC=gcc > /dev/null 2>&1
131	$linker
132	echo Checking validity of new $program
133	if $checker
134	then
135		echo Program is OK
136		okfiles="$okfiles $f"
137	else
138		echo Program is not OK
139		notokfiles="$notokfiles $f"
140	fi
141	mv ${f}__OLD__ ${f}
142done
143echo ""
144echo "Program is OK when these files are recompiled with native gcc: "
145echo "$okfiles"
146echo ""
147echo "Program is not OK when these files are recompiled with native gcc: "
148echo "$notokfiles"
149echo ""
150exit 0
151