Hi, Let me try to reproduce the whole process with original GMP source:
1. I've downloaded https://gmplib.org/download/gmp/gmp-6.2.1.tar.xz 2. Exported my CFLAGS with LTO enabled: export COMMON_FLAGS="-O3 -march=native -mcpu=native -pipe -funroll-loops \ -fomit-frame-pointer -fforce-addr -ftracer -fno-stack-protector -flto" export CFLAGS="${COMMON_FLAGS}" export CXXFLAGS="${COMMON_FLAGS}" 3. Configure, make & install GMP with gcc version 12.2.1 20221231: ./configure --prefix=/usr/ --libdir=/usr/lib64/ --enable-cxx make -j4 make install 4. Cloned iproute2: git clone git://git.kernel.org/pub/scm/network/iproute2/iproute2.git 5. Try to compile iproute2 with hang as follows: CC tc_cbq.o CC tc_estimator.o ... hangs here ... 6. Commented out the following piece of iproute2 code in tc/tc_estimator.c: // if (A/(-log(w)) > time_const) // break; 7. Continued to compile iproute2 and compilation went OK Same error was reproduced with current https://gmplib.org/repo/gmp-6.2/ Switching off LTO let iproute2 compile OK Regards! пт, 6 янв. 2023 г. в 15:00, Torbjörn Granlund <t...@gmplib.org>: > Some One <glu...@gmail.com> writes: > > I've found the problem related to GCC LTO optimization for GMP for ARM > aarch64 > under QEMU with ARM Neoverse-N1 virt-4.2 (Oracle Cloud) and ARM virt-7.2 > (Apple M1) > both running the latest Gentoo with gmp-6.2.1-r5 compiled by both > gcc version 11.3.1 20221209 and gcc version 12.2.1 20221231. > > To reproduce: > 1. Compile GMP with LTO optimization -- compiles OK > 2. Try to compile iproute2-6.1.0 or cmake-3.25.1 -- compilation hangs > during the process > > Disabling LTO optimization for GMP solves the problem. > > I would not expect any GMP developer to attempt to reproduce this > problem. You're using a patched GMP ("-r5") in an environment which > would be very close to impossible to reproduce! > > You need to isolate this problem and only then report it to the package > maintainer of the buggy program. > > -- > Torbjörn > Please encrypt, key id 0xC8601622 > _______________________________________________ gmp-bugs mailing list gmp-bugs@gmplib.org https://gmplib.org/mailman/listinfo/gmp-bugs