error from GMP_ASM_W32 when building with IBM Open XL C/C++ for AIX 17.1.1

[Vincent Lefevre]

Hi,

I tried to build GMP 6.3.0 with openxlC on AIX (for testing) using

  ./configure --prefix=$HOME/gmp-openxlc CC=/opt/IBM/openxlC/17.1.1/bin/ibm-clang_r CFLAGS=-O2

on cfarm119.cfarm.net (a.k.a. gcc119), but got the following
warnings and error related to assembler:

[...]
checking for assembler label suffix... :
checking for assembler global directive... .globl
checking for assembler global directive attribute... 
checking if globals are prefixed by underscore... 0654-210 conftest.o is not valid in the current object file mode.
        Use the -X option to specify the desired object mode.
unknown
configure: WARNING: +----------------------------------------------------------
configure: WARNING: | Cannot determine global symbol prefix.
configure: WARNING: | /usr/bin/nm -B -X64 output doesn't contain a global data symbol.
configure: WARNING: | Will proceed with no underscore.
configure: WARNING: | If this is wrong then you'll get link errors referring
configure: WARNING: | to ___gmpn_add_n (note three underscores).
configure: WARNING: | In this case do a fresh build with an override,
configure: WARNING: |     ./configure gmp_cv_asm_underscore=yes
configure: WARNING: +----------------------------------------------------------
checking how to switch to read-only data section... .csect .text[PR]
checking for assembler .type directive... 
checking for assembler .size directive... 
checking for assembler local label prefix... configure: WARNING: "/usr/bin/nm -B -X64" failure
configure: WARNING: cannot determine local label, using default L
L
checking for assembler byte directive... .byte
checking how to define a 32-bit word... 0654-210 conftest.o is not valid in the current object file mode.
        Use the -X option to specify the desired object mode.
configure: error: cannot determine how to define a 32-bit word

This error comes from the GMP_ASM_W32 acinclude.m4 macro.

config.log.gz attached.

-bash-5.1$ uname -a
AIX gcc119 3 7 00F9C1964C00

-bash-5.1$ /opt/IBM/openxlC/17.1.1/bin/ibm-clang_r --version
IBM Open XL C/C++ for AIX 17.1.1 (5725-C72, 5765-J18), version 17.1.1.2, clang version 15.0.0 (build 3948f09)
Target: powerpc-ibm-aix7.3.0.0
Thread model: posix
InstalledDir: /opt/IBM/openxlC/17.1.1/bin

-bash-5.1$ ./config.guess
powerpc-ibm-aix7.3.1.0

-bash-5.1$ ./configfsf.guess
-bash: ./configfsf.guess: The file access permissions do not allow the specified action.

Indeed, the permissions in the tarball are incorrect (see my other
bug report).

-bash-5.1$ sh ./configfsf.guess
powerpc-ibm-aix7.3.1.0

-- 
Vincent Lefèvre <vincent at vinc17.net> - Web: <https://www.vinc17.net/>
100% accessible validated (X)HTML - Blog: <https://www.vinc17.net/blog/>
Work: CR INRIA - computer arithmetic / AriC project (LIP, ENS-Lyon)
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