...
cc_r -q64 -c   -D_ALL_SOURCE -D_ANSI_C_SOURCE -D_POSIX_SOURCE -qmaxmem=-1 -qnoansialias -DUSE_NATIVE_DLOPEN -DNEED_PTHREAD_INIT -q64 -DUSE_64_BIT_ALL -q64 -D_AIX5_3_64_ -D_AIX5_3_ -DAIX64 -DAIX=5 -UUSE_CLEARCASE -DBUILDBITS=64 -UCBR_OVII_REGISTERFPFILES -D_ALL_SOURCE -D_ANSI_C_SOURCE -D_POSIX_SOURCE -qmaxmem=-1 -qnoansialias -DUSE_NATIVE_DLOPEN -DNEED_PTHREAD_INIT -q64 -DUSE_64_BIT_ALL -q64 -D_AIX5_3_64_ -D_AIX5_3_ -DAIX64 -DAIX=5 -UUSE_CLEARCASE -DBUILDBITS=64 -UCBR_OVII_REGISTERFPFILES -D_ALL_SOURCE -D_ANSI_C_SOURCE -D_POSIX_SOURCE -qmaxmem=-1 -qnoansialias -DUSE_NATIVE_DLOPEN -DNEED_PTHREAD_INIT -q64 -DUSE_64_BIT_ALL -q64 -D_AIX5_3_64_ -D_AIX5_3_ -DAIX64 -DAIX=5 -UUSE_CLEARCASE -DBUILDBITS=64 -UCBR_OVII_REGISTERFPFILES -O   -DVERSION=\"0.53\" -DXS_VERSION=\"0.53\"  "-I../.."   OS.c

##</code><code>##

"OS.c", line 59.24: 1506-194 (S) Incomplete type is not allowed.
"OS.c", line 60.10: 1506-007 (S) "struct userinfo" is undefined.
"OS.c", line 71.41: 1506-043 (S) The operand of the sizeof operator is not valid.
"OS.c", line 112.34: 1506-043 (S) The operand of the sizeof operator is not valid.
"OS.c", line 113.34: 1506-043 (S) The operand of the sizeof operator is not valid.
"OS.c", line 161.32: 1506-043 (S) The operand of the sizeof operator is not valid.
gmake[2]: *** [OS.o] Error 1