I have the following setup: $ uname -a AIX server1 2 5 000B079F4C00 $ gcc -v Reading specs from /usr/local/lib/gcc-lib/powerpc-ibm-aix4.3.2.0/2.95.3/specs gcc version 2.95.3 20010315 (release) I am trying to build GCC version 3.4.4 using the following configuration: ./configure make and I get the following errors. I appreciate any suggestions anyone might have. make[1]: Entering directory `/flash/local/software/gcc/downloads/gcc-3.4.4/libiberty' if [ x"" != x ]; then \ gcc -c -DHAVE_CONFIG_H -g -O2 -I. -I./../include -W -Wall -Wtraditional -pedantic floatformat.c -o pic/floatformat.o; \ else true; fi gcc -c -DHAVE_CONFIG_H -g -O2 -I. -I./../include -W -Wall -Wtraditional -pedantic floatformat.c -o floatformat.o In file included from floatformat.c:27: /usr/local/lib/gcc-lib/powerpc-ibm-aix4.3.2.0/2.95.3/include/math.h:1070: `#' operator should be followed by a macro argument name /usr/local/lib/gcc-lib/powerpc-ibm-aix4.3.2.0/2.95.3/include/math.h:1062: unterminated `#if' conditional make[1]: *** [floatformat.o] Error 1 make[1]: Leaving directory `/flash/local/software/gcc/downloads/gcc-3.4.4/libiberty' make: *** [all-libiberty] Error 2 Thanks, John Ling