OpenSSL 3 build error with ibm-clang compiler on AIX

[Zhongyan Wang]

Hi team,
I have a question, how to configure and build OpenSSL 3 with ibm-clang compiler on AIX?

Previously, my product specifies “aix64-cc” as target platform on AIX, and uses xlc 10.1. It’s OK.
$ xlc -qversion
IBM XL C/C++ for AIX, V10.1
Version: 10.01.0000.0008

But now the compiler for my product is upgraded to ibm-clang.
$ ibm-clang –version
IBM Open XL C/C++ for AIX 17.1.0 (5725-C72, 5765-J18), clang version 13.0.0
Target: powerpc-ibm-aix7.2.0.0
Thread model: posix
InstalledDir: /opt/IBM/openxlC/17.1.0/bin

I find there is no “clang” like target for aix in 10-main.conf, only “cc” and “gcc”.
I try “export CC=ibm-clang” and then “./Configure aix64-cc” or “./Configure aix64-gcc”, both make fail.

►aix64-cc
===================================================================================================================================================================================================================================================================================================
$ make
…….
ibm-clang  -I. -Iinclude -Iapps/include  -qpic -q64 -qmaxmem=16384 -qro -qroconst -qthreaded -Wa,--noexecstack -Qunused-arguments -O -DB_ENDIAN -DOPENSSL_PIC -DOPENSSLDIR="\"/usr/local/ssl\"" -DENGINESDIR="\"/usr/local/lib/engines-3\"" -DMODULESDIR="\"/usr/local/lib/ossl-modules\"" -D_THREAD_SAFE -DOPENSSL_BUILDING_OPENSSL -DNDEBUG  -MMD -MF apps/lib/libapps-lib-app_libctx.d.tmp -MT apps/lib/libapps-lib-app_libctx.o -c -o apps/lib/libapps-lib-app_libctx.o apps/lib/app_libctx.c
.orig: error: unknown argument '-qpic'; did you mean '-fpic'?
.orig: error: unknown argument: '-q64'
.orig: error: unknown argument: '-qmaxmem=16384'
.orig: error: unknown argument: '-qro'
.orig: error: unknown argument: '-qroconst'
.orig: error: unknown argument: '-qthreaded'
make: The error code from the last command is 1.
===================================================================================================================================================================================================================================================================================================

►aix64-gcc
===================================================================================================================================================================================================================================================================================================
$ make
…….
ibm-clang  -I. -Iinclude -Iapps/include  -maix64 -pthread -Wa,--noexecstack -Qunused-arguments -O -DB_ENDIAN -DOPENSSL_PIC -DOPENSSLDIR="\"/usr/local/ssl\"" -DENGINESDIR="\"/usr/local/lib/engines-3\"" -DMODULESDIR="\"/usr/local/lib/ossl-modules\"" -DOPENSSL_BUILDING_OPENSSL -DNDEBUG  -MMD -MF apps/lib/libapps-lib-app_libctx.d.tmp -MT apps/lib/libapps-lib-app_libctx.o -c -o apps/lib/libapps-lib-app_libctx.o apps/lib/app_libctx.c
.orig: error: unknown argument: '-maix64'
make: The error code from the last command is 1.
===================================================================================================================================================================================================================================================================================================


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