Vincent Lefevre <vinc...@vinc17.net> writes: > That said, perhaps GMP might be improved to detect the ABI by a > simple parsing of $CFLAGS when provided by the user (in case values > like -m32 or -m64 are standard).
In Nettle, I try to detect the ABI used by the configured C compiler, with a configure test like case "$host_cpu" in [x86_64 | amd64]) AC_TRY_COMPILE([ #if defined(__x86_64__) || defined(__arch64__) #error 64-bit x86 #endif ], [], [ ABI=32 ], [ ABI=64 ]) ;; ... (and the above misses x32). That's a bit verbose, but I think it's less brittle than trying to parse compiler flags. For one, how would we know which ABI the compiler uses by default? The result is used when selecting assembly code. But then the way I recommend to configure ABI is still not to set CFLAGS, but to set CC. E.g., ./configure CC='gcc -m32' CXX='g++ -m32' Regards, /Niels -- Niels Möller. PGP-encrypted email is preferred. Keyid 368C6677. Internet email is subject to wholesale government surveillance. _______________________________________________ gmp-bugs mailing list gmp-bugs@gmplib.org https://gmplib.org/mailman/listinfo/gmp-bugs