linbox does not build with clang (sage 9.4.bet4)

[Vincent Delecroix]

Dear all,

I tried to build sage 9.4.beta4 using clang 12.0.0. It failed for
linbox with

/usr/bin/bash ../../libtool --tag=CXX --mode=compile clang++
-std=gnu++11 -DHAVE_CONFIG_H -I. -I../.. -I../.. -fopenmp
-DFFLAS_COMPILED -DFFPACK_COMPILED -fabi-version=6 -fabi-version=6
-O2 -Wall -g -DNDEBUG -U_LB_DEBUG -DDISABLE_COMMENTATOR -O2 -g
-march=native -msse -msse2 -msse3 -mssse3 -msse4.1 -msse4.2 -mavx
-mavx2 -mfma -c -o error.lo error.C
libtool: compile: clang++ -std=gnu++11 -DHAVE_CONFIG_H -I. -I../..
-I../.. -fopenmp -DFFLAS_COMPILED -DFFPACK_COMPILED -fabi-version=6
-fabi-version=6 -O2 -Wall -g -DNDEBUG -U_LB_DEBUG -DDISABLE_COMMENTATOR
-O2 -g -march=native -msse -msse2 -msse3 -mssse3 -msse4.1 -msse4.2 -mavx
-mavx2 -mfma -c error.C -fPIC -DPIC -o .libs/error.o
clang-12: error: unknown argument: '-fabi-version=6'
clang-12: error: unknown argument: '-fabi-version=6'

Does someone know a way around?

Best
Vincent

[Isuru Fernando]

You can replace `-fabi-version=6` with `-D__GXX_ABI_VERSION=1006`.

Isuru

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[Vincent Delecroix]

Not really. sage configure script was happy with givaro from
my system. This givaro is compiled with gcc and the option
"-fabi-version=6". The linbox configure script makes a query to
givaro to get these options. I can not change them.

I did force the compilation of givaro during the sage build and now
linbox compilation just works.

Shouldn't we check this compatibility in the givaro configure
script? Should we ask givaro to not use this "-fabi-version=6"?

Vincent