When making gcc 4.4.0 20090104 I saved a log of the build.
I checked through the build log and found quite a few warnings. If
the compiler is working correctly _and_ we code correctly then we
will not have warnings (or errors) in our code.
Here is a partial list:
/usr/share/src/gcc_build/./gcc/xgcc -B/usr/share/src/gcc_build/./gcc/
-B/usr/local/i386-pc-solaris2.11/bin/ -B/usr/local/i386-pc-solaris2.11/lib/
-isystem /usr/local/i386-pc-solaris2.11/include -isystem
/usr/local/i386-pc-solaris2.11/sys-include -g -O2 -m64 -O2 -g -O2 -DIN_GCC
-W -Wall -Wwrite-strings -Wstrict-prototypes -Wmissing-prototypes -Wcast-qual
-Wold-style-definition -isystem ./include -fPIC -g -DHAVE_GTHR_DEFAULT
-DIN_LIBGCC2 -D__GCC_FLOAT_NOT_NEEDED -I. -I. -I../../.././gcc
-I../../../../gcc_trunk/libgcc -I../../../../gcc_trunk/libgcc/.
-I../../../../gcc_trunk/libgcc/../gcc -I../../../../gcc_trunk/libgcc/../include
-I../../../../gcc_trunk/libgcc/../libdecnumber/dpd
-I../../../../gcc_trunk/libgcc/../libdecnumber -DHAVE_CC_TLS -o
unwind-dw2-fde.o -MT unwind-dw2-fde.o -MD -MP -MF unwind-dw2-fde.dep
-fexceptions -c ../../../../gcc_trunk/libgcc/../gcc/unwind-dw2-fde.c
-fvisibility=hidden -DHIDE_EXPORTS
../../../../gcc_trunk/libgcc/../gcc/unwind-dw2-fde.c: In function
'fde_unencoded_compare':
../../../../gcc_trunk/libgcc/../gcc/unwind-dw2-fde.c:326: warning:
dereferencing type-punned pointer will break strict-aliasing rules
../../../../gcc_trunk/libgcc/../gcc/unwind-dw2-fde.c:327: warning:
dereferencing type-punned pointer will break strict-aliasing rules
../../../../gcc_trunk/libgcc/../gcc/unwind-dw2-fde.c: In function 'add_fdes':
../../../../gcc_trunk/libgcc/../gcc/unwind-dw2-fde.c:682: warning:
dereferencing type-punned pointer will break strict-aliasing rules
../../../../gcc_trunk/libgcc/../gcc/unwind-dw2-fde.c: In function
'linear_search_fdes':
../../../../gcc_trunk/libgcc/../gcc/unwind-dw2-fde.c:800: warning:
dereferencing type-punned pointer will break strict-aliasing rules
../../../../gcc_trunk/libgcc/../gcc/unwind-dw2-fde.c: In function
'binary_search_unencoded_fdes':
../../../../gcc_trunk/libgcc/../gcc/unwind-dw2-fde.c:848: warning:
dereferencing type-punned pointer will break strict-aliasing rules
if [ x"-fpic" != x ]; then \
/usr/share/src/gcc_build/./prev-gcc/xgcc
-B/usr/share/src/gcc_build/./prev-gcc/ -B/usr/local/i386-pc-solaris2.11/bin/ -c
-DHAVE_CONFIG_H -g -O2 -fexceptions -I. -I../../gcc_trunk/libiberty/../include
-W -Wall -Wwrite-strings -Wc++-compat -Wstrict-prototypes -pedantic -fpic
../../gcc_trunk/libiberty/cp-demangle.c -o pic/cp-demangle.o; \
else true; fi
../../gcc_trunk/libiberty/cp-demangle.c: In function 'cplus_demangle_type':
../../gcc_trunk/libiberty/cp-demangle.c:1914: warning: 'ret' may be used
uninitialized in this function
/usr/share/src/gcc_build/./prev-gcc/xgcc -B/usr/share/src/gcc_build/./prev-gcc/
-B/usr/local/i386-pc-solaris2.11/bin/ -c -DHAVE_CONFIG_H -g -O2 -fexceptions
-I. -I../../gcc_trunk/libiberty/../include -W -Wall -Wwrite-strings
-Wc++-compat -Wstrict-prototypes -pedantic
../../gcc_trunk/libiberty/cp-demangle.c -o cp-demangle.o
../../gcc_trunk/libiberty/cp-demangle.c: In function 'cplus_demangle_type':
../../gcc_trunk/libiberty/cp-demangle.c:1914: warning: 'ret' may be used
uninitialized in this function
/usr/share/src/gcc_build/./prev-gcc/xgcc -B/usr/share/src/gcc_build/./prev-gcc/
-B/usr/local/i386-pc-solaris2.11/bin/ -g -O2 -DIN_GCC -W -Wall
-Wwrite-strings -Wstrict-prototypes -Wmissing-prototypes -Wcast-qual
-Wold-style-definition -Wc++-compat -Wmissing-format-attribute -pedantic
-Wno-long-long -Wno-variadic-macros -Wno-overlength-strings -Werror -fno-common
-DHAVE_CONFIG_H -DGENERATOR_FILE -o build/genrecog \
build/genrecog.o build/rtl.o build/read-rtl.o build/ggc-none.o
build/vec.o build/min-insn-modes.o build/gensupport.o build/print-rtl.o
build/errors.o .././libiberty/libiberty.a
build/genrecog ../../gcc_trunk/gcc/config/i386/i386.md \
insn-conditions.md > tmp-recog.c
../../gcc_trunk/gcc/config/i386/i386.md:19694: warning: operand 1 missing mode?
../../gcc_trunk/gcc/config/i386/i386.md:19711: warning: operand 1 missing mode?
../../gcc_trunk/gcc/config/i386/i386.md:19752: warning: operand 1 missing mode?
../../gcc_trunk/gcc/config/i386/i386.md:19769: warning: operand 1 missing mode?
../../gcc_trunk/gcc/config/i386/sse.md:11521: warning: operand 1 missing mode?
/bin/sh ../../gcc_trunk/gcc/../move-if-change tmp-recog.c insn-recog.c
echo timestamp > s-recog
/usr/share/src/gcc_build/./prev-gcc/xgcc -B/usr/share/src/gcc_build/./prev-gcc/
-B/usr/local/i386-pc-solaris2.11/bin/ -c -g -O2 -DIN_GCC -W -Wall
-Wwrite-strings -Wstrict-prototypes -Wmissing-prototypes -Wcast-qual
-Wold-style-definition -Wc++-compat -Wmissing-format-attribute -pedantic
-Wno-long-long -Wno-variadic-macros -Wno-overlength-strings -Werror -fno-common
-Wno-error -DHAVE_CONFIG_H -I. -I. -I../../gcc_trunk/gcc
-I../../gcc_trunk/gcc/. -I../../gcc_trunk/gcc/../include
-I../../gcc_trunk/gcc/../libcpp/include -I../../gcc_trunk/gcc/../libdecnumber
-I../../gcc_trunk/gcc/../libdecnumber/dpd -I../libdecnumber
-DCLOOG_PPL_BACKEND -fexceptions ../../gcc_trunk/gcc/dfp.c -o dfp.o
../../gcc_trunk/gcc/dfp.c: In function 'encode_decimal32':
../../gcc_trunk/gcc/dfp.c:142: warning: dereferencing type-punned pointer will
break strict-aliasing rules
../../gcc_trunk/gcc/dfp.c: In function 'decode_decimal32':
../../gcc_trunk/gcc/dfp.c:158: warning: dereferencing type-punned pointer will
break strict-aliasing rules
../../gcc_trunk/gcc/dfp.c: In function 'encode_decimal64':
../../gcc_trunk/gcc/dfp.c:182: warning: dereferencing type-punned pointer will
break strict-aliasing rules
../../gcc_trunk/gcc/dfp.c:188: warning: dereferencing type-punned pointer will
break strict-aliasing rules
../../gcc_trunk/gcc/dfp.c: In function 'decode_decimal64':
../../gcc_trunk/gcc/dfp.c:207: warning: dereferencing type-punned pointer will
break strict-aliasing rules
../../gcc_trunk/gcc/dfp.c:212: warning: dereferencing type-punned pointer will
break strict-aliasing rules
../../gcc_trunk/gcc/dfp.c: In function 'encode_decimal128':
../../gcc_trunk/gcc/dfp.c:238: warning: dereferencing type-punned pointer will
break strict-aliasing rules
../../gcc_trunk/gcc/dfp.c:248: warning: dereferencing type-punned pointer will
break strict-aliasing rules
../../gcc_trunk/gcc/dfp.c: In function 'decode_decimal128':
../../gcc_trunk/gcc/dfp.c:267: warning: dereferencing type-punned pointer will
break strict-aliasing rules
../../gcc_trunk/gcc/dfp.c:274: warning: dereferencing type-punned pointer will
break strict-aliasing rules
../../gcc_trunk/gcc/dfp.c:267: warning: dereferencing pointer '({anonymous})'
does break strict-aliasing rules
../../gcc_trunk/gcc/dfp.c:267: note: initialized from here
../../gcc_trunk/gcc/dfp.c:268: warning: dereferencing pointer '({anonymous})'
does break strict-aliasing rules
../../gcc_trunk/gcc/dfp.c:268: note: initialized from here
../../gcc_trunk/gcc/dfp.c:269: warning: dereferencing pointer '({anonymous})'
does break strict-aliasing rules
../../gcc_trunk/gcc/dfp.c:269: note: initialized from here
../../gcc_trunk/gcc/dfp.c:270: warning: dereferencing pointer '({anonymous})'
does break strict-aliasing rules
../../gcc_trunk/gcc/dfp.c:270: note: initialized from here
../../gcc_trunk/gcc/dfp.c: In function 'encode_decimal128':
../../gcc_trunk/gcc/dfp.c:238: warning: dereferencing pointer '({anonymous})'
does break strict-aliasing rules
../../gcc_trunk/gcc/dfp.c:238: note: initialized from here
../../gcc_trunk/gcc/dfp.c:239: warning: dereferencing pointer '({anonymous})'
does break strict-aliasing rules
../../gcc_trunk/gcc/dfp.c:239: note: initialized from here
../../gcc_trunk/gcc/dfp.c:240: warning: dereferencing pointer '({anonymous})'
does break strict-aliasing rules
../../gcc_trunk/gcc/dfp.c:240: note: initialized from here
../../gcc_trunk/gcc/dfp.c:241: warning: dereferencing pointer '({anonymous})'
does break strict-aliasing rules
../../gcc_trunk/gcc/dfp.c:241: note: initialized from here
../../gcc_trunk/gcc/dfp.c: In function 'decode_decimal32':
../../gcc_trunk/gcc/dfp.c:158: warning: dereferencing pointer '({anonymous})'
does break strict-aliasing rules
../../gcc_trunk/gcc/dfp.c:158: note: initialized from here
../../gcc_trunk/gcc/dfp.c: In function 'encode_decimal64':
../../gcc_trunk/gcc/dfp.c:182: warning: dereferencing pointer '({anonymous})'
does break strict-aliasing rules
../../gcc_trunk/gcc/dfp.c:182: note: initialized from here
../../gcc_trunk/gcc/dfp.c:183: warning: dereferencing pointer '({anonymous})'
does break strict-aliasing rules
../../gcc_trunk/gcc/dfp.c:183: note: initialized from here
../../gcc_trunk/gcc/dfp.c: In function 'decode_decimal64':
../../gcc_trunk/gcc/dfp.c:207: warning: dereferencing pointer '({anonymous})'
does break strict-aliasing rules
../../gcc_trunk/gcc/dfp.c:207: note: initialized from here
../../gcc_trunk/gcc/dfp.c:208: warning: dereferencing pointer '({anonymous})'
does break strict-aliasing rules
../../gcc_trunk/gcc/dfp.c:208: note: initialized from here
/usr/share/src/gcc_build/./gcc/xgcc -B/usr/share/src/gcc_build/./gcc/
-B/usr/local/i386-pc-solaris2.11/bin/ -B/usr/local/i386-pc-solaris2.11/lib/
-isystem /usr/local/i386-pc-solaris2.11/include -isystem
/usr/local/i386-pc-solaris2.11/sys-include -c -g -O2 -W -Wall -gnatpg
g-comlin.adb -o g-comlin.o
g-comlin.adb: In function 'GNAT.COMMAND_LINE.FIND_LONGEST_MATCHING_SWITCH':
g-comlin.adb:96: warning: 'PARAM' may be used uninitialized in this function
g-comlin.adb:96: note: 'PARAM' was declared here
/usr/share/src/gcc_build/./gcc/xgcc -B/usr/share/src/gcc_build/./gcc/
-B/usr/local/i386-pc-solaris2.11/bin/ -B/usr/local/i386-pc-solaris2.11/lib/
-isystem /usr/local/i386-pc-solaris2.11/include -isystem
/usr/local/i386-pc-solaris2.11/sys-include -c -g -O2 -W -Wall -gnatpg
g-socket.adb -o g-socket.o
g-socket.adb: In function 'GNAT.SOCKETS.SEND_SOCKET':
g-socket.adb:1786: warning: 'SIN' is used uninitialized in this function
g-socket.adb: In function 'GNAT.SOCKETS.RECEIVE_SOCKET':
g-socket.adb:1586: warning: 'SIN' is used uninitialized in this function
g-socket.adb: In function 'GNAT.SOCKETS.GET_SOCKET_NAME':
g-socket.adb:1001: warning: 'SIN' is used uninitialized in this function
g-socket.adb: In function 'GNAT.SOCKETS.GET_PEER_NAME':
g-socket.adb:929: warning: 'SIN' is used uninitialized in this function
g-socket.adb: In function 'GNAT.SOCKETS.CONNECT_SOCKET':
g-socket.adb:623: warning: 'SIN' is used uninitialized in this function
g-socket.adb: In function 'GNAT.SOCKETS.BIND_SOCKET':
g-socket.adb:396: warning: 'SIN' is used uninitialized in this function
g-socket.adb: In function 'GNAT.SOCKETS.ACCEPT_SOCKET':
g-socket.adb:277: warning: 'SIN' is used uninitialized in this function
../../xgcc -B../../ -c -g -O2 -W -Wall -Wwrite-strings -Wstrict-prototypes
-Wmissing-prototypes -gnatpg -gnata -I- -I../rts -I.
-I/usr/share/src/gcc_trunk/gcc/ada
/usr/share/src/gcc_trunk/gcc/ada/prj-nmsc.adb -o prj-nmsc.o
/usr/share/src/gcc_trunk/gcc/ada/prj-nmsc.adb: In function
'Prj.Nmsc.Check_Naming_Schemes':
/usr/share/src/gcc_trunk/gcc/ada/prj-nmsc.adb:3272: warning: 'Casing' may be
used uninitialized in this function
mkdir -p ./i386-pc-solaris2.11/bits/stdtr1c++.h.gch
/usr/share/src/gcc_build/./gcc/xgcc -shared-libgcc
-B/usr/share/src/gcc_build/./gcc -nostdinc++
-L/usr/share/src/gcc_build/i386-pc-solaris2.11/amd64/libstdc++-v3/src
-L/usr/share/src/gcc_build/i386-pc-solaris2.11/amd64/libstdc++-v3/src/.libs
-B/usr/local/i386-pc-solaris2.11/bin/ -B/usr/local/i386-pc-solaris2.11/lib/
-isystem /usr/local/i386-pc-solaris2.11/include -isystem
/usr/local/i386-pc-solaris2.11/sys-include -m64 -Winvalid-pch -x c++-header -g
-O2
-I/usr/share/src/gcc_build/i386-pc-solaris2.11/amd64/libstdc++-v3/include/i386-pc-solaris2.11
-I/usr/share/src/gcc_build/i386-pc-solaris2.11/amd64/libstdc++-v3/include
-I/usr/share/src/gcc_trunk/libstdc++-v3/libsupc++ -O2 -g
/usr/share/src/gcc_trunk/libstdc++-v3/include/precompiled/stdtr1c++.h -o
i386-pc-solaris2.11/bits/stdtr1c++.h.gch/O2g.gch
/usr/share/src/gcc_trunk/libstdc++-v3/include/precompiled/stdtr1c++.h:34:25:
warning:
/usr/share/src/gcc_build/i386-pc-solaris2.11/amd64/libstdc++-v3/include/i386-pc-solaris2.11/bits/stdc++.h.gch/O0g.gch:
created and used with differing settings of '-momit-leaf-frame-pointer'
libtool: compile: /usr/share/src/gcc_build/./gcc/xgcc -shared-libgcc
-B/usr/share/src/gcc_build/./gcc -nostdinc++
-L/usr/share/src/gcc_build/i386-pc-solaris2.11/libstdc++-v3/src
-L/usr/share/src/gcc_build/i386-pc-solaris2.11/libstdc++-v3/src/.libs
-B/usr/local/i386-pc-solaris2.11/bin/ -B/usr/local/i386-pc-solaris2.11/lib/
-isystem /usr/local/i386-pc-solaris2.11/include -isystem
/usr/local/i386-pc-solaris2.11/sys-include
-I/usr/share/src/gcc_build/i386-pc-solaris2.11/libstdc++-v3/include/i386-pc-solaris2.11
-I/usr/share/src/gcc_build/i386-pc-solaris2.11/libstdc++-v3/include
-I/usr/share/src/gcc_trunk/libstdc++-v3/libsupc++ -fno-implicit-templates -Wall
-Wextra -Wwrite-strings -Wcast-qual -fdiagnostics-show-location=once
-ffunction-sections -fdata-sections -g -O2 -c
../../../../gcc_trunk/libstdc++-v3/src/locale_init.cc -fPIC -DPIC -o
.libs/locale_init.o
../../../../gcc_trunk/libstdc++-v3/src/locale_init.cc: In static member
function 'static const std::locale& std::locale::classic()':
../../../../gcc_trunk/libstdc++-v3/src/locale_init.cc:247: warning:
dereferencing type-punned pointer will break strict-aliasing rules
libtool: compile: /usr/share/src/gcc_build/./gcc/xgcc
-B/usr/share/src/gcc_build/./gcc/ -B/usr/local/i386-pc-solaris2.11/bin/
-B/usr/local/i386-pc-solaris2.11/lib/ -isystem
/usr/local/i386-pc-solaris2.11/include -isystem
/usr/local/i386-pc-solaris2.11/sys-include -DHAVE_CONFIG_H -I.
-I../../../gcc_trunk/libgfortran -I. -iquote../../../gcc_trunk/libgfortran/io
-I../../../gcc_trunk/libgfortran/../gcc
-I../../../gcc_trunk/libgfortran/../gcc/config -I../.././gcc -D_GNU_SOURCE
-std=gnu99 -Wall -Wstrict-prototypes -Wmissing-prototypes
-Wold-style-definition -Wextra -Wwrite-strings -fcx-fortran-rules -g -O2 -MT
write.lo -MD -MP -MF .deps/write.Tpo -c
../../../gcc_trunk/libgfortran/io/write.c -fPIC -DPIC -o .libs/write.o
In file included from ../../../gcc_trunk/libgfortran/io/write.c:42:
../../../gcc_trunk/libgfortran/io/write_float.def: In function 'write_float':
../../../gcc_trunk/libgfortran/io/write_float.def:839: warning: dereferencing
type-punned pointer will break strict-aliasing rules
../../../gcc_trunk/libgfortran/io/write_float.def:843: warning: dereferencing
type-punned pointer will break strict-aliasing rules
../../../gcc_trunk/libgfortran/io/write_float.def:848: warning: dereferencing
type-punned pointer will break strict-aliasing rules
../../../gcc_trunk/libgfortran/io/write_float.def:843: warning: dereferencing
pointer '({anonymous})' does break strict-aliasing rules
../../../gcc_trunk/libgfortran/io/write_float.def:843: note: initialized from
here
../../../gcc_trunk/libgfortran/io/write_float.def:848: warning: dereferencing
pointer '({anonymous})' does break strict-aliasing rules
../../../gcc_trunk/libgfortran/io/write_float.def:848: note: initialized from
here
libtool: compile: /usr/share/src/gcc_build/./gcc/xgcc
-B/usr/share/src/gcc_build/./gcc/ -B/usr/local/i386-pc-solaris2.11/bin/
-B/usr/local/i386-pc-solaris2.11/lib/ -isystem
/usr/local/i386-pc-solaris2.11/include -isystem
/usr/local/i386-pc-solaris2.11/sys-include -DHAVE_CONFIG_H
-I/usr/share/src/gcc_trunk/boehm-gc/include -fexceptions -Iinclude
-I././targ-include -I.//libc/include -g -O2 -fexceptions -Iinclude
-I././targ-include -I.//libc/include -c ../../../gcc_trunk/boehm-gc/mark_rts.c
-fPIC -DPIC -o .libs/mark_rts.o
../../../gcc_trunk/boehm-gc/mark_rts.c: In function 'GC_approx_sp':
../../../gcc_trunk/boehm-gc/mark_rts.c:379: warning: function returns address
of local variable
libtool: compile: /usr/share/src/gcc_build/./gcc/xgcc
-B/usr/share/src/gcc_build/./gcc/ -B/usr/local/i386-pc-solaris2.11/bin/
-B/usr/local/i386-pc-solaris2.11/lib/ -isystem
/usr/local/i386-pc-solaris2.11/include -isystem
/usr/local/i386-pc-solaris2.11/sys-include -c -I.
-I/usr/share/src/gcc_trunk/libobjc -g -O2 -m64 -W -Wall -Wwrite-strings
-Wstrict-prototypes -DIN_GCC -DIN_TARGET_LIBS -fno-strict-aliasing -fexceptions
-I/usr/share/src/gcc_trunk/libobjc/objc
-I/usr/share/src/gcc_trunk/libobjc/../gcc
-I/usr/share/src/gcc_trunk/libobjc/../gcc/config -I../../.././gcc
-I/usr/share/src/gcc_trunk/libobjc/../include
/usr/share/src/gcc_trunk/libobjc/thr-objc.c -fPIC -DPIC -o .libs/thr-objc.o
In file included from ../../.././gcc/gthr-default.h:1,
from /usr/share/src/gcc_trunk/libobjc/../gcc/gthr.h:165,
from /usr/share/src/gcc_trunk/libobjc/thr-objc.c:42:
/usr/share/src/gcc_trunk/libobjc/../gcc/gthr-posix.h: In function
'__gthread_objc_thread_detach':
/usr/share/src/gcc_trunk/libobjc/../gcc/gthr-posix.h:394: warning: cast to
pointer from integer of different size
/usr/share/src/gcc_trunk/libobjc/../gcc/gthr-posix.h: In function
'__gthread_objc_thread_id':
/usr/share/src/gcc_trunk/libobjc/../gcc/gthr-posix.h:491: warning: cast to
pointer from integer of different size
I left out many duplicate and minor warnings.
Thanks,
Rob
--
Summary: gcc 4.4.0 20090104 - Warnings during bootstrap about
poor coding
Product: gcc
Version: 4.4.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: bootstrap
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: rob1weld at aol dot com
GCC build triplet: i386-pc-solaris2.11
GCC host triplet: i386-pc-solaris2.11
GCC target triplet: i386-pc-solaris2.11
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38746
