Hi,
This is a summary of the compilation warnings caused by gcc-3.0.4 on
Linux. Some of them are rather harmless (e.g. unused parameter), but
could be avoided nevertheless. Others (like comparison
unsigned/signed) may be an implementation bug. Please check.
The following two tables list the numbers of warnings per file:
./configure --disable-warnings:
2 sanei_scsi.c
2 sanei_usb.c
4 agfafocus.c
5 as6e.c
2 avision.c
8 canon-sane.c
23 coolscan.c
1 coolscan2.c
1 dc25.c
10 djpeg.c
12 dmc.c
2 epson_scsi.c
2 hp-accessor.c
53 hp-option.c
2 hp-scl.c
2 hp.c
6 microtek.c
25 mustek_pp.c
12 nec.c
3 net.c
4 pie.c
4 qcam.c
1 ricoh-scsi.c
12 s9036.c
8 sharp.c
14 sp15c.c
1 sp15c-scsi.h
1 sp15c.c
11 st400.c
4 tamarack.c
13 umax_pp_low.c
6 umax_pp.c
2 dll-preload.c
1 dll.c
Full log at:
http://www.meier-geinitz.de/sane/tmp/warnings-2002-11-16-gcc3.0-nowarn.log
With all warnings enabled, there are some more "false alerts". E.g.
the compiler complains about printf ("%p", pointer), where pointer
points to something other that void. Can this really make trouble?
Anyway, for completeness:
2 ../include/getopt.h
22 sanei_wire.c
22 sanei_scsi.c
4 sanei_usb.c
2 abaton.c
4 agfafocus.c
2 apple.c
3 artec.c
5 as6e.c
2 avision.c
10 canon-sane.c
2 canon630u-common.c
1 canon630u.c
1 canon_pp-dev.c
27 canon_pp.c
18 coolscan-scsidef.h
64 coolscan.c
2 coolscan2.c
1 dc25.c
10 djpeg.c
1 dc210.c
17 dmc.c
2 epson_scsi.c
2 epson.c
55 gt68xx_low.c
2 gt68xx_gt6801.c
2 gt68xx_gt6816.c
4 hp-accessor.c
4 hp-device.c
55 hp-option.c
2 hp-scl.c
2 hp.c
1 leo.c
2 matsushita.c
11 microtek.c
65 microtek2.c
33 mustek_pp.c
3 mustek_usb_low.c
4 mustek_usb_mid.c
14 mustek_usb_high.c
18 nec.c
20 net.c
4 pie.c
2 plustek.c
5 qcam.c
1 ricoh-scsi.c
2 ricoh.c
12 s9036.c
1 sceptre.c
13 sharp.c
4 snapscan-usb.c
18 sp15c-scsi.h
23 sp15c.c
1 sp15c-scsi.h
1 sp15c.c
33 st400.c
8 tamarack.c
3 test-picture.c
11 test.c
1 teco1.c
1 teco2.c
1 teco3.c
3 umax-usb.c
1 umax.c
14 umax_pp_low.c
6 umax_pp.c
1 umax1220u.c
1 v4l.c
1 dll.c
2 dll-preload.c
9 dll.c
3 scanimage.c
4 saned.c
Full log at:
http://www.meier-geinitz.de/sane/tmp/warnings-2002-11-16-gcc3.0-warn.log
Sorted by type of warning (gcc-3.0, warnings enabled):
230 warning: void format, [foo] type
170 warning: unused parameter `[foo]'
115 warning: cast discards qualifiers from pointer target type
54 warning: pointer targets in passing arg [foo] of `[bar]' differ in
signedness
37 warning: pointer targets in initialization differ in signedness
32 warning: comparison between signed and unsigned
19 warning: passing arg [foo] of `[bar]' discards qualifiers from pointer
target type
11 warning: unused variable `[foo]'
5 warning: signed and unsigned type in conditional expression
5 warning: function declaration isn't a prototype
5 warning: `[foo]' defined but not used
4 warning: ISO C forbids use of cast expressions as lvalues
3 warning: string length `[foo]' is greater than the length `509' ISO
C89 compilers are required to support
3 warning: overflow in implicit constant conversion
3 warning: implicit declaration of function [foo]
3 warning: assignment discards qualifiers from pointer target type
2 warning: pointer targets in assignment differ in signedness
2 warning: passing arg [foo] of `[bar]' from incompatible pointer type
2 warning: missing initializer
2 warning: [foo] format, [bar] arg (arg [baz])
1 warning: too many arguments for format
1 warning: suggest explicit braces to avoid ambiguous `else'
1 warning: operation on `p' may be undefined
1 warning: assignment from incompatible pointer type
Bye,
Henning
