Hi, When I am building gcc3.3.2 on AIX5.2, I get the following error message.what could be wrong? Thanks in advance. _Jay Krishnamoorthy Bootstrapping the compiler /home/jkrishna/downloads/gcc/gcc gmake[1]: Entering directory `/home2/jkrishna/downloads/gcc/gcc' gmake AR_FOR_TARGET="ar -X32_64" \ RANLIB_FOR_TARGET="ranlib" \ CC="/usr/bin/cc" libdir=/home/jkrishna/gnu/ibm/lib LANGUAGES="c " \ CFLAGS="-g " MAKEINFO="/home/jkrishna/downloads/gcc-3.3.1/missing makeinfo --no-split" \ MAKEINFOFLAGS="" COVERAGE_FLAGS= gmake[2]: Entering directory `/home2/jkrishna/downloads/gcc/gcc' /usr/bin/cc -c -g -DIN_GCC -DHAVE_CONFIG_H -DGENERATOR_FILE -I. -I. -I/home/jkrishna/downloads/gcc-3.3.1/gcc -I/home/jkrishna/downloads/gcc-3.3.1/gcc/. -I/home/jkrishna/downloads/gcc-3.3.1/gcc/config -I/home/jkrishna/downloads/gcc-3.3.1/gcc/../include /home/jkrishna/downloads/gcc-3.3.1/gcc/gengenrtl.c -o gengenrtl.o "/home/jkrishna/downloads/gcc-3.3.1/gcc/system.h", line 551.14: 1506-247 (S) Incompatible type specifier "_Bool". gmake[2]: *** [gengenrtl.o] Error 1 gmake[2]: Leaving directory `/home2/jkrishna/downloads/gcc/gcc' gmake[1]: *** [stage1_build] Error 2 gmake[1]: Leaving directory `/home2/jkrishna/downloads/gcc/gcc' gmake: *** [bootstrap] Error 2