Hi, I fear the top-leader of the warnings (hp-option.c) will stay on the list. Most of the warnings are "unused parameters". This is because the functions are called through a single function pointer. And some of the functions really don't use the parameter. A solution could be to add global variables to which the unused parameters are assigned. This is what I dont't want to do. Any other solution without adding dummy code just to satisfy the compiler ?
--Peter Henning Meier-Geinitz schrieb: > 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 > _______________________________________________ > Sane-devel mailing list > [email protected] > http://www.mostang.com/mailman/listinfo/sane-devel > -- Peter Kirchgessner http://www.kirchgessner.net mailto:[email protected]
