[Bug c/44482] New: some warnings in libgcc amd64-darwin 4.5.0

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* [Bug c/44482]  New: some warnings in libgcc amd64-darwin 4.5.0
@ 2010-06-09 16:28 jay dot krell at cornell dot edu
  0 siblings, 0 replies; only message in thread
From: jay dot krell at cornell dot edu @ 2010-06-09 16:28 UTC (permalink / raw)
  To: gcc-bugs

note this is later bootstrap stages so shouldn't matter what the bootstrap
compiler was (assuming it compiled the compiler reasonably correctly)

For the missing prototypes, I suggest you just put them right there:

void Foo(void);
void Foo(void)
{
  ...
}


for the uninitialized I suggest just initializing them and not worrying about
it.


For the cast I already posted a patch adding const.


The shifts are buried in macros and I didn't look so not sure.
Personally if I want (a << 32) I'd just do ((a << 31) << 1)..or, uh, just 0,
but that may or may not be relevant here.


_darwin10_Unwind_FindEnclosingFunction I didn't look at.


I'll maybe come back to this myself, hopefully that's not an abuse of gcc
bugzilla (esp. given that this is not using -disable-bootstrap so not a
terrible bug report).


I'm surprised -Werror isn't used here.
I suggest -Wmissing-prototypes only apply to callers not implementers? I
realize it is a tradeoff, because you want to make sure there is a prototype
somewhere for callers (though not really for libgcc math helpers...) and
forcing the implementor to pull that in is a reasonable way to make that so.


/home/jayk/src/gcc-4.5.0/libgcc/../gcc/unwind-dw2.c: In function
'uw_init_context_1':
/home/jayk/src/gcc-4.5.0/libgcc/../gcc/unwind-dw2.c:1452:5: warning: missing
initializer
/home/jayk/src/gcc-4.5.0/libgcc/../gcc/unwind-dw2.c:1452:5: warning: (near
initialization for 'once_regsizes.__reserved')



/Users/jay/src/gcc-4.5.0/libgcc/../gcc/unwind-dw2-fde-darwin.c: At top level:
/Users/jay/src/gcc-4.5.0/libgcc/../gcc/unwind-dw2-fde-darwin.c:279:1: warning:
no previous prototype for '_darwin10_Unwind_FindEnclosingFunction'


/Users/jay/obj/gcc/./gcc/xgcc -B/Users/jay/obj/gcc/./gcc/
-B/Users/jay/amd64-darwin/bin/ -B/Users/jay/amd64-darwin/lib/ -isystem
/Users/jay/amd64-darwin/include -isystem /Users/jay/amd64-darwin/sys-include   
-g -O2 -m32 -O2  -g -O2 -DIN_GCC   -W -Wall -Wwrite-strings -Wcast-qual
-Wstrict-prototypes -Wmissing-prototypes -Wold-style-definition  -isystem
./include  -fPIC -pipe -g -DHAVE_GTHR_DEFAULT -DIN_LIBGCC2
-D__GCC_FLOAT_NOT_NEEDED   -I. -I. -I../../.././gcc
-I/Users/jay/src/gcc-4.5.0/libgcc -I/Users/jay/src/gcc-4.5.0/libgcc/.
-I/Users/jay/src/gcc-4.5.0/libgcc/../gcc
-I/Users/jay/src/gcc-4.5.0/libgcc/../include  -DHAVE_CC_TLS -DUSE_EMUTLS
-Wno-missing-prototypes -Wno-type-limits -o fixunstfsi_s.o -MT fixunstfsi_s.o
-MD -MP -MF fixunstfsi_s.dep -DSHARED -fexceptions -c
/Users/jay/src/gcc-4.5.0/libgcc/../gcc/config/soft-fp/fixunstfsi.c
/Users/jay/src/gcc-4.5.0/libgcc/../gcc/config/soft-fp/fixunstfsi.c: In function
'__fixunstfsi':
/Users/jay/src/gcc-4.5.0/libgcc/../gcc/config/soft-fp/fixunstfsi.c:42:3:
warning: left shift count >= width of type



/Users/jay/obj/gcc/./gcc/xgcc -B/Users/jay/obj/gcc/./gcc/
-B/Users/jay/amd64-darwin/bin/ -B/Users/jay/amd64-darwin/lib/ -isystem
/Users/jay/amd64-darwin/include -isystem /Users/jay/amd64-darwin/sys-include   
-g -O2 -m32 -O2  -g -O2 -DIN_GCC   -W -Wall -Wwrite-strings -Wcast-qual
-Wstrict-prototypes -Wmissing-prototypes -Wold-style-definition  -isystem
./include  -fPIC -pipe -g -DHAVE_GTHR_DEFAULT -DIN_LIBGCC2
-D__GCC_FLOAT_NOT_NEEDED   -I. -I. -I../../.././gcc
-I/Users/jay/src/gcc-4.5.0/libgcc -I/Users/jay/src/gcc-4.5.0/libgcc/.
-I/Users/jay/src/gcc-4.5.0/libgcc/../gcc
-I/Users/jay/src/gcc-4.5.0/libgcc/../include  -DHAVE_CC_TLS -DUSE_EMUTLS
-Wno-missing-prototypes -Wno-type-limits -o multf3_s.o -MT multf3_s.o -MD -MP
-MF multf3_s.dep -DSHARED -fexceptions -c
/Users/jay/src/gcc-4.5.0/libgcc/../gcc/config/soft-fp/multf3.c
/Users/jay/src/gcc-4.5.0/libgcc/../gcc/config/soft-fp/multf3.c: In function
'__multf3':
/Users/jay/src/gcc-4.5.0/libgcc/../gcc/config/soft-fp/multf3.c:38:1: warning:
'R_e' may be used uninitialized in this function



/Users/jay/obj/gcc/./gcc/xgcc -B/Users/jay/obj/gcc/./gcc/
-B/Users/jay/amd64-darwin/bin/ -B/Users/jay/amd64-darwin/lib/ -isystem
/Users/jay/amd64-darwin/include -isystem /Users/jay/amd64-darwin/sys-include   
-g -O2 -O2  -g -O2 -DIN_GCC   -W -Wall -Wwrite-strings -Wcast-qual
-Wstrict-prototypes -Wmissing-prototypes -Wold-style-definition  -isystem
./include  -fPIC -pipe -g -DHAVE_GTHR_DEFAULT -DIN_LIBGCC2
-D__GCC_FLOAT_NOT_NEEDED   -I. -I. -I../.././gcc
-I/Users/jay/src/gcc-4.5.0/libgcc -I/Users/jay/src/gcc-4.5.0/libgcc/.
-I/Users/jay/src/gcc-4.5.0/libgcc/../gcc
-I/Users/jay/src/gcc-4.5.0/libgcc/../include  -DHAVE_CC_TLS -DUSE_EMUTLS -o
darwin-64_s.o -MT darwin-64_s.o -MD -MP -MF darwin-64_s.dep -DSHARED
-fexceptions -c /Users/jay/src/gcc-4.5.0/libgcc/../gcc/config/darwin-64.c
/Users/jay/obj/gcc/./gcc/xgcc -B/Users/jay/obj/gcc/./gcc/
-B/Users/jay/amd64-darwin/bin/ -B/Users/jay/amd64-darwin/lib/ -isystem
/Users/jay/amd64-darwin/include -isystem /Users/jay/amd64-darwin/sys-include   
-g -O2 -O2  -g -O2 -DIN_GCC   -W -Wall -Wwrite-strings -Wcast-qual
-Wstrict-prototypes -Wmissing-prototypes -Wold-style-definition  -isystem
./include  -fPIC -pipe -g -DHAVE_GTHR_DEFAULT -DIN_LIBGCC2
-D__GCC_FLOAT_NOT_NEEDED   -I. -I. -I../.././gcc
-I/Users/jay/src/gcc-4.5.0/libgcc -I/Users/jay/src/gcc-4.5.0/libgcc/.
-I/Users/jay/src/gcc-4.5.0/libgcc/../gcc
-I/Users/jay/src/gcc-4.5.0/libgcc/../include  -DHAVE_CC_TLS -DUSE_EMUTLS -o
addtf3_s.o -MT addtf3_s.o -MD -MP -MF addtf3_s.dep -DSHARED -fexceptions -c
/Users/jay/src/gcc-4.5.0/libgcc/../gcc/config/soft-fp/addtf3.c
/Users/jay/src/gcc-4.5.0/libgcc/../gcc/config/soft-fp/addtf3.c:35:8: warning:
no previous prototype for '__addtf3'


/Users/jay/obj/gcc/./gcc/xgcc -B/Users/jay/obj/gcc/./gcc/
-B/Users/jay/amd64-darwin/bin/ -B/Users/jay/amd64-darwin/lib/ -isystem
/Users/jay/amd64-darwin/include -isystem /Users/jay/amd64-darwin/sys-include   
-g -O2 -O2  -g -O2 -DIN_GCC   -W -Wall -Wwrite-strings -Wcast-qual
-Wstrict-prototypes -Wmissing-prototypes -Wold-style-definition  -isystem
./include  -fPIC -pipe -g -DHAVE_GTHR_DEFAULT -DIN_LIBGCC2
-D__GCC_FLOAT_NOT_NEEDED   -I. -I. -I../.././gcc
-I/Users/jay/src/gcc-4.5.0/libgcc -I/Users/jay/src/gcc-4.5.0/libgcc/.
-I/Users/jay/src/gcc-4.5.0/libgcc/../gcc
-I/Users/jay/src/gcc-4.5.0/libgcc/../include  -DHAVE_CC_TLS -DUSE_EMUTLS -o
divtf3_s.o -MT divtf3_s.o -MD -MP -MF divtf3_s.dep -DSHARED -fexceptions -c
/Users/jay/src/gcc-4.5.0/libgcc/../gcc/config/soft-fp/divtf3.c
/Users/jay/src/gcc-4.5.0/libgcc/../gcc/config/soft-fp/divtf3.c:35:8: warning:
no previous prototype for '__divtf3'
/Users/jay/src/gcc-4.5.0/libgcc/../gcc/config/soft-fp/divtf3.c: In function
'__divtf3':
/Users/jay/src/gcc-4.5.0/libgcc/../gcc/config/soft-fp/divtf3.c:38:1: warning:
'R_e' may be used uninitialized in this function
/Users/jay/obj/gcc/./gcc/xgcc -B/Users/jay/obj/gcc/./gcc/
-B/Users/jay/amd64-darwin/bin/ -B/Users/jay/amd64-darwin/lib/ -isystem
/Users/jay/amd64-darwin/include -isystem /Users/jay/amd64-darwin/sys-include   
-g -O2 -O2  -g -O2 -DIN_GCC   -W -Wall -Wwrite-strings -Wcast-qual
-Wstrict-prototypes -Wmissing-prototypes -Wold-style-definition  -isystem
./include  -fPIC -pipe -g -DHAVE_GTHR_DEFAULT -DIN_LIBGCC2
-D__GCC_FLOAT_NOT_NEEDED   -I. -I. -I../.././gcc
-I/Users/jay/src/gcc-4.5.0/libgcc -I/Users/jay/src/gcc-4.5.0/libgcc/.
-I/Users/jay/src/gcc-4.5.0/libgcc/../gcc
-I/Users/jay/src/gcc-4.5.0/libgcc/../include  -DHAVE_CC_TLS -DUSE_EMUTLS -o
eqtf2_s.o -MT eqtf2_s.o -MD -MP -MF eqtf2_s.dep -DSHARED -fexceptions -c
/Users/jay/src/gcc-4.5.0/libgcc/../gcc/config/soft-fp/eqtf2.c
/Users/jay/src/gcc-4.5.0/libgcc/../gcc/config/soft-fp/eqtf2.c:35:9: warning: no
previous prototype for '__eqtf2'
/Users/jay/src/gcc-4.5.0/libgcc/../gcc/config/soft-fp/eqtf2.c:51:1: warning: no
previous prototype for '__netf2'


/Users/jay/obj/gcc/./gcc/xgcc -B/Users/jay/obj/gcc/./gcc/
-B/Users/jay/amd64-darwin/bin/ -B/Users/jay/amd64-darwin/lib/ -isystem
/Users/jay/amd64-darwin/include -isystem /Users/jay/amd64-darwin/sys-include   
-g -O2 -O2  -g -O2 -DIN_GCC   -W -Wall -Wwrite-strings -Wcast-qual
-Wstrict-prototypes -Wmissing-prototypes -Wold-style-definition  -isystem
./include  -fPIC -pipe -g -DHAVE_GTHR_DEFAULT -DIN_LIBGCC2
-D__GCC_FLOAT_NOT_NEEDED   -I. -I. -I../.././gcc
-I/Users/jay/src/gcc-4.5.0/libgcc -I/Users/jay/src/gcc-4.5.0/libgcc/.
-I/Users/jay/src/gcc-4.5.0/libgcc/../gcc
-I/Users/jay/src/gcc-4.5.0/libgcc/../include  -DHAVE_CC_TLS -DUSE_EMUTLS -o
getf2_s.o -MT getf2_s.o -MD -MP -MF getf2_s.dep -DSHARED -fexceptions -c
/Users/jay/src/gcc-4.5.0/libgcc/../gcc/config/soft-fp/getf2.c
/Users/jay/src/gcc-4.5.0/libgcc/../gcc/config/soft-fp/getf2.c:35:9: warning: no
previous prototype for '__getf2'
/Users/jay/src/gcc-4.5.0/libgcc/../gcc/config/soft-fp/getf2.c:51:1: warning: no
previous prototype for '__gttf2'


/Users/jay/obj/gcc/./gcc/xgcc -B/Users/jay/obj/gcc/./gcc/
-B/Users/jay/amd64-darwin/bin/ -B/Users/jay/amd64-darwin/lib/ -isystem
/Users/jay/amd64-darwin/include -isystem /Users/jay/amd64-darwin/sys-include   
-g -O2 -O2  -g -O2 -DIN_GCC   -W -Wall -Wwrite-strings -Wcast-qual
-Wstrict-prototypes -Wmissing-prototypes -Wold-style-definition  -isystem
./include  -fPIC -pipe -g -DHAVE_GTHR_DEFAULT -DIN_LIBGCC2
-D__GCC_FLOAT_NOT_NEEDED   -I. -I. -I../.././gcc
-I/Users/jay/src/gcc-4.5.0/libgcc -I/Users/jay/src/gcc-4.5.0/libgcc/.
-I/Users/jay/src/gcc-4.5.0/libgcc/../gcc
-I/Users/jay/src/gcc-4.5.0/libgcc/../include  -DHAVE_CC_TLS -DUSE_EMUTLS -o
letf2_s.o -MT letf2_s.o -MD -MP -MF letf2_s.dep -DSHARED -fexceptions -c
/Users/jay/src/gcc-4.5.0/libgcc/../gcc/config/soft-fp/letf2.c
/Users/jay/src/gcc-4.5.0/libgcc/../gcc/config/soft-fp/letf2.c:35:9: warning: no
previous prototype for '__letf2'
/Users/jay/src/gcc-4.5.0/libgcc/../gcc/config/soft-fp/letf2.c:51:1: warning: no
previous prototype for '__lttf2'


/Users/jay/obj/gcc/./gcc/xgcc -B/Users/jay/obj/gcc/./gcc/
-B/Users/jay/amd64-darwin/bin/ -B/Users/jay/amd64-darwin/lib/ -isystem
/Users/jay/amd64-darwin/include -isystem /Users/jay/amd64-darwin/sys-include   
-g -O2 -O2  -g -O2 -DIN_GCC   -W -Wall -Wwrite-strings -Wcast-qual
-Wstrict-prototypes -Wmissing-prototypes -Wold-style-definition  -isystem
./include  -fPIC -pipe -g -DHAVE_GTHR_DEFAULT -DIN_LIBGCC2
-D__GCC_FLOAT_NOT_NEEDED   -I. -I. -I../.././gcc
-I/Users/jay/src/gcc-4.5.0/libgcc -I/Users/jay/src/gcc-4.5.0/libgcc/.
-I/Users/jay/src/gcc-4.5.0/libgcc/../gcc
-I/Users/jay/src/gcc-4.5.0/libgcc/../include  -DHAVE_CC_TLS -DUSE_EMUTLS -o
multf3_s.o -MT multf3_s.o -MD -MP -MF multf3_s.dep -DSHARED -fexceptions -c
/Users/jay/src/gcc-4.5.0/libgcc/../gcc/config/soft-fp/multf3.c
/Users/jay/src/gcc-4.5.0/libgcc/../gcc/config/soft-fp/multf3.c:35:8: warning:
no previous prototype for '__multf3'
/Users/jay/src/gcc-4.5.0/libgcc/../gcc/config/soft-fp/multf3.c: In function
'__multf3':
/Users/jay/src/gcc-4.5.0/libgcc/../gcc/config/soft-fp/multf3.c:38:1: warning:
'R_e' may be used uninitialized in this function


/Users/jay/obj/gcc/./gcc/xgcc -B/Users/jay/obj/gcc/./gcc/
-B/Users/jay/amd64-darwin/bin/ -B/Users/jay/amd64-darwin/lib/ -isystem
/Users/jay/amd64-darwin/include -isystem /Users/jay/amd64-darwin/sys-include   
-g -O2 -O2  -g -O2 -DIN_GCC   -W -Wall -Wwrite-strings -Wcast-qual
-Wstrict-prototypes -Wmissing-prototypes -Wold-style-definition  -isystem
./include  -fPIC -pipe -g -DHAVE_GTHR_DEFAULT -DIN_LIBGCC2
-D__GCC_FLOAT_NOT_NEEDED   -I. -I. -I../.././gcc
-I/Users/jay/src/gcc-4.5.0/libgcc -I/Users/jay/src/gcc-4.5.0/libgcc/.
-I/Users/jay/src/gcc-4.5.0/libgcc/../gcc
-I/Users/jay/src/gcc-4.5.0/libgcc/../include  -DHAVE_CC_TLS -DUSE_EMUTLS -o
negtf2_s.o -MT negtf2_s.o -MD -MP -MF negtf2_s.dep -DSHARED -fexceptions -c
/Users/jay/src/gcc-4.5.0/libgcc/../gcc/config/soft-fp/negtf2.c
/Users/jay/src/gcc-4.5.0/libgcc/../gcc/config/soft-fp/negtf2.c:35:8: warning:
no previous prototype for '__negtf2'


/Users/jay/obj/gcc/./gcc/xgcc -B/Users/jay/obj/gcc/./gcc/
-B/Users/jay/amd64-darwin/bin/ -B/Users/jay/amd64-darwin/lib/ -isystem
/Users/jay/amd64-darwin/include -isystem /Users/jay/amd64-darwin/sys-include   
-g -O2 -O2  -g -O2 -DIN_GCC   -W -Wall -Wwrite-strings -Wcast-qual
-Wstrict-prototypes -Wmissing-prototypes -Wold-style-definition  -isystem
./include  -fPIC -pipe -g -DHAVE_GTHR_DEFAULT -DIN_LIBGCC2
-D__GCC_FLOAT_NOT_NEEDED   -I. -I. -I../.././gcc
-I/Users/jay/src/gcc-4.5.0/libgcc -I/Users/jay/src/gcc-4.5.0/libgcc/.
-I/Users/jay/src/gcc-4.5.0/libgcc/../gcc
-I/Users/jay/src/gcc-4.5.0/libgcc/../include  -DHAVE_CC_TLS -DUSE_EMUTLS -o
subtf3_s.o -MT subtf3_s.o -MD -MP -MF subtf3_s.dep -DSHARED -fexceptions -c
/Users/jay/src/gcc-4.5.0/libgcc/../gcc/config/soft-fp/subtf3.c
/Users/jay/src/gcc-4.5.0/libgcc/../gcc/config/soft-fp/subtf3.c:35:8: warning:
no previous prototype for '__subtf3'


/Users/jay/obj/gcc/./gcc/xgcc -B/Users/jay/obj/gcc/./gcc/
-B/Users/jay/amd64-darwin/bin/ -B/Users/jay/amd64-darwin/lib/ -isystem
/Users/jay/amd64-darwin/include -isystem /Users/jay/amd64-darwin/sys-include   
-g -O2 -O2  -g -O2 -DIN_GCC   -W -Wall -Wwrite-strings -Wcast-qual
-Wstrict-prototypes -Wmissing-prototypes -Wold-style-definition  -isystem
./include  -fPIC -pipe -g -DHAVE_GTHR_DEFAULT -DIN_LIBGCC2
-D__GCC_FLOAT_NOT_NEEDED   -I. -I. -I../.././gcc
-I/Users/jay/src/gcc-4.5.0/libgcc -I/Users/jay/src/gcc-4.5.0/libgcc/.
-I/Users/jay/src/gcc-4.5.0/libgcc/../gcc
-I/Users/jay/src/gcc-4.5.0/libgcc/../include  -DHAVE_CC_TLS -DUSE_EMUTLS -o
unwind-dw2-fde-darwin.o -MT unwind-dw2-fde-darwin.o -MD -MP -MF
unwind-dw2-fde-darwin.dep -fexceptions -c
/Users/jay/src/gcc-4.5.0/libgcc/../gcc/unwind-dw2-fde-darwin.c
-fvisibility=hidden -DHIDE_EXPORTS
In file included from
/Users/jay/src/gcc-4.5.0/libgcc/../gcc/unwind-dw2-fde-darwin.c:36:0:
/Users/jay/src/gcc-4.5.0/libgcc/../gcc/unwind-dw2-fde.h: In function
'last_fde':
/Users/jay/src/gcc-4.5.0/libgcc/../gcc/unwind-dw2-fde.h:173:3: warning: cast
discards qualifiers from pointer target type
/Users/jay/src/gcc-4.5.0/libgcc/../gcc/unwind-dw2-fde-darwin.c: At top level:
/Users/jay/src/gcc-4.5.0/libgcc/../gcc/unwind-dw2-fde-darwin.c:279:1: warning:
no previous prototype for '_darwin10_Unwind_FindEnclosingFunction'


-- 
           Summary: some warnings in libgcc amd64-darwin 4.5.0
           Product: gcc
           Version: 4.5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: jay dot krell at cornell dot edu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44482


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2010-06-09 16:28 [Bug c/44482] New: some warnings in libgcc amd64-darwin 4.5.0 jay dot krell at cornell dot edu

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