Hi, when building gcc I get bunch of build warnings like these: ../../../gcc.gnu.org/trunk/gcc/attribs.c: In function âdecl_attributesâ: ../../../gcc.gnu.org/trunk/gcc/attribs.c:307: warning: unknown conversion type character âEâ in format ../../../gcc.gnu.org/trunk/gcc/attribs.c:307: warning: too many arguments for format ../../../gcc.gnu.org/trunk/gcc/attribs.c:315: warning: unknown conversion type character âEâ in format or these ../../../gcc.gnu.org/trunk/gcc/c-typeck.c: In function âhandle_warn_cast_qualâ: ../../../gcc.gnu.org/trunk/gcc/c-typeck.c:4438: warning: unknown conversion type character â#â in format ../../../gcc.gnu.org/trunk/gcc/c-typeck.c:4438: warning: too many arguments for format ../../../gcc.gnu.org/trunk/gcc/c-typeck.c:4445: warning: unknown conversion type character â#â in format ../../../gcc.gnu.org/trunk/gcc/c-typeck.c:4445: warning: too many arguments for format ../../../gcc.gnu.org/trunk/gcc/c-typeck.c: In function âconvert_for_assignmentâ: ../../../gcc.gnu.org/trunk/gcc/c-typeck.c:5359: warning: unknown conversion type character â#â in format ../../../gcc.gnu.org/trunk/gcc/c-typeck.c:5359: warning: too many arguments for format ../../../gcc.gnu.org/trunk/gcc/c-typeck.c:5359: warning: unknown conversion type character â#â in format ../../../gcc.gnu.org/trunk/gcc/c-typeck.c:5359: warning: too many arguments for format ../../../gcc.gnu.org/trunk/gcc/c-typeck.c:5359: warning: unknown conversion type character â#â in format ../../../gcc.gnu.org/trunk/gcc/c-typeck.c:5359: warning: too many arguments for format ../../../gcc.gnu.org/trunk/gcc/c-typeck.c:5359: warning: unknown conversion type character â#â in format ../../../gcc.gnu.org/trunk/gcc/c-typeck.c:5359: warning: too many arguments for format ../../../gcc.gnu.org/trunk/gcc/c-typeck.c:5375: warning: unknown conversion type character âvâ in format ../../../gcc.gnu.org/trunk/gcc/c-typeck.c:5375: warning: too many arguments for format ../../../gcc.gnu.org/trunk/gcc/c-typeck.c:5375: warning: unknown conversion type character âvâ in format or these ../../../gcc.gnu.org/trunk/gcc/c-family/c-common.c: In function âc_common_nodes_and_builtinsâ: ../../../gcc.gnu.org/trunk/gcc/c-family/c-common.c:4813: warning: null argument where non-null required (argument 1) ../../../gcc.gnu.org/trunk/gcc/c-family/c-common.c:4813: warning: null argument where non-null required (argument 1) ../../../gcc.gnu.org/trunk/gcc/c-family/c-common.c:4813: warning: null argument where non-null required (argument 1) These warnings occur when I build the current trunk, but these warnings are not new and I have seen them for a long time already and for older releases of gcc. The gcc to build is configured as ../../gcc.gnu.org/trunk/configure --target=avr --prefix=/local/gnu/install/gcc-4.7 --disable-nls --disable-shared --enable-languages=c,c++ The build gcc is configures as `gcc -v`: Target: i586-suse-linux Configured with: ../configure --prefix=/usr --infodir=/usr/share/info --mandir=/usr/share/man --libdir=/usr/lib --libexecdir=/usr/lib --enable-languages=c,c++,objc,fortran,obj-c++,java,ada --enable-checking=release --with-gxx-include-dir=/usr/include/c++/4.3 --enable-ssp --disable-libssp --with-bugurl=http://bugs.opensuse.org/ --with-pkgversion='SUSE Linux' --disable-libgcj --disable-libmudflap --with-slibdir=/lib --with-system-zlib --enable-__cxa_atexit --enable-libstdcxx-allocator=new --disable-libstdcxx-pch --enable-version-specific-runtime-libs --program-suffix=-4.3 --enable-linux-futex --without-system-libunwind --with-cpu=generic --build=i586-suse-linux Thread model: posix gcc version 4.3.2 [gcc-4_3-branch revision 141291] (SUSE Linux) One typical command line that issues warnings is: gcc -c -DIN_GCC_FRONTEND -DIN_GCC_FRONTEND -g -O2 -DIN_GCC -DCROSS_DIRECTORY_STRUCTURE -W -Wall -Wwrite-strings -Wcast-qual -Wstrict-prototypes -Wmissing-prototypes -Wold-style-definition -Wc++-compat -fno-common -DHAVE_CONFIG_H -I. -Ic-family -I../../../gcc.gnu.org/trunk/gcc -I../../../gcc.gnu.org/trunk/gcc/c-family -I../../../gcc.gnu.org/trunk/gcc/../include -I../../../gcc.gnu.org/trunk/gcc/../libcpp/include -I/mnt/nfs/home/georg/gnu/build/gcc-4.6-avr/./gmp -I/mnt/nfs/home/georg/gnu/gcc.gnu.org/trunk/gmp -I/mnt/nfs/home/georg/gnu/build/gcc-4.6-avr/./mpfr -I/mnt/nfs/home/georg/gnu/gcc.gnu.org/trunk/mpfr -I/mnt/nfs/home/georg/gnu/gcc.gnu.org/trunk/mpc/src -I../../../gcc.gnu.org/trunk/gcc/../libdecnumber -I../../../gcc.gnu.org/trunk/gcc/../libdecnumber/dpd -I../libdecnumber ../../../gcc.gnu.org/trunk/gcc/c-family/c-common.c -o c-family/c-common.o Must I use a specific version of gcc to build? Thanks for hints.
