https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96387
cents2823 at yahoo dot co.jp changed: What |Removed |Added ---------------------------------------------------------------------------- Status|RESOLVED |CLOSED --- Comment #7 from cents2823 at yahoo dot co.jp --- >GCC uses GMP, MPFR (which uses GMP internally) and MPC (which uses MPFR). so >yes it depends on GMP ABI being stable. I understood the mutual relationship. I found a way to change gmp ABI and make gcc work properly. Steps to follow: #1 ubuntu install #2 apt-get gcc(gcc-9.3.0) #3 gcc source install(for example gcc-10.1.0) #3-1 gcc source download #3-2 ./contrib/download_prerequisites(GMP,MPFR,MPC,.:download) *#3-3 gmp ABI update(mpz struct change) #3-4 configure,make,make install #4 ABI update gmp install use new gcc This bug was caused by incorrect use, and since the normality of normal use has been confirmed, I will closed it. Thanking you in advance. Frome:Tsukamoto