Hi Team, We are using GCC 4.8.3 for one of our legacy applications i.e: Automatch. after database upgrade from 11/2 to 19.0.0, while recompiling one of our proc program we are getting below error. Could you please help us to resolve below issue. Please find full error trace in above attachment. Also could you please provide any URL or website to download proper GCC along with their dependencies as we are not able to find all dependencies at one place. Error:- amatch@autd1db01 $ make -f PushOfPayables.mk /ORACLE/app/oracle/product/19.0.0/dbhome_1/bin/proc SQLCHECK=SEMANTICS mode=oracle ireclen=120 userid=am_user/steve7 DEFINE=__64BIT__ /usr/include/ iname=/app/amatch/tst/code/src/proc/PushOfPayables.pc oname=/app/amatch/tst/code/src/c/PushOfPayables.c Pro*C/C++: Release 19.0.0.0.0 - Production on Wed Feb 22 09:54:42 2023 Version 19.15.0.0.0 Copyright (c) 1982, 2019, Oracle and/or its affiliates. All rights reserved. System default option values taken from: /ORACLE/app/oracle/product/19.0.0/dbhome_1/precomp/admin/pcscfg.cfg /usr/bin/gcc -c -o /app/amatch/tst/code/obj/PushOfPayables.o -maix64 /usr/include/ /app/amatch/tst/code/include -I/ORACLE/app/oracle/product/19.0.0/dbhome_1/precomp/public -I/app/amatch/tst/code/include /app/amatch/tst/code/src/c/PushOfPayables.c In file included from /usr/include/sys/resource.h:57:0, from /opt/freeware/lib/gcc/powerpc-ibm-aix7.1.0.0/4.8.3/include-fixed/sys/wait.h:62, from /opt/freeware/lib/gcc/powerpc-ibm-aix7.1.0.0/4.8.3/include-fixed/stdlib.h:349, from /app/amatch/tst/code/src/c/PushOfPayables.c:181: /usr/include/sys/time.h:110:16: error: redefinition of 'struct sigset_t' typedef struct sigset_t { ^ In file included from /opt/freeware/lib/gcc/powerpc-ibm-aix7.1.0.0/4.8.3/include-fixed/stdio.h:479:0, from /app/amatch/tst/code/src/c/PushOfPayables.c:180: /opt/freeware/lib/gcc/powerpc-ibm-aix7.1.0.0/4.8.3/include-fixed/sys/types.h:345:16: note: originally defined here typedef struct sigset_t { ^ In file included from /usr/include/sys/resource.h:57:0, from /opt/freeware/lib/gcc/powerpc-ibm-aix7.1.0.0/4.8.3/include-fixed/sys/wait.h:62, from /opt/freeware/lib/gcc/powerpc-ibm-aix7.1.0.0/4.8.3/include-fixed/stdlib.h:349, from /app/amatch/tst/code/src/c/PushOfPayables.c:181: /usr/include/sys/time.h:126:3: error: conflicting types for 'sigset_t' } sigset_t; ^ Thanks & Regards, Vinay Kumar