https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103146
Bug ID: 103146
Summary: [12 Regression] libstdc++-v3 bootstrap failure on
32-bit BE powerpc since r12-4952
Product: gcc
Version: 12.0
Status: UNCONFIRMED
Keywords: build
Severity: normal
Priority: P3
Component: libstdc++
Assignee: unassigned at gcc dot gnu.org
Reporter: asolokha at gmx dot com
Target Milestone: ---
Target: powerpc-e300c3-linux-gnu
libstdc++-v3 shipped w/ gcc-12.0.0-alpha20211107 snapshot
(g:962ff7d2849e1fa6a1fe0535aa2dec5c2b9a32a6) fails to build because of missing
__builtin_darn():
libtool: compile:
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-12.0.0_alpha20211107/work/build/./gcc/xgcc
-shared-libgcc
-B/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-12.0.0_alpha20211107/work/build/./gcc
-nostdinc++
-L/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-12.0.0_alpha20211107/work/build/powerpc-e300c3-linux-gnu/libstdc++-v3/src
-L/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-12.0.0_alpha20211107/work/build/powerpc-e300c3-linux-gnu/libstdc++-v3/src/.libs
-L/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-12.0.0_alpha20211107/work/build/powerpc-e300c3-linux-gnu/libstdc++-v3/libsupc++/.libs
-B/usr/powerpc-e300c3-linux-gnu/bin/ -B/usr/powerpc-e300c3-linux-gnu/lib/
-isystem /usr/powerpc-e300c3-linux-gnu/include -isystem
/usr/powerpc-e300c3-linux-gnu/sys-include
-I/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-12.0.0_alpha20211107/work/gcc-12-20211107/libstdc++-v3/../libgcc
-I/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-12.0.0_alpha20211107/work/build/powerpc-e300c3-linux-gnu/libstdc++-v3/include/powerpc-e300c3-linux-gnu
-I/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-12.0.0_alpha20211107/work/build/powerpc-e300c3-linux-gnu/libstdc++-v3/include
-I/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-12.0.0_alpha20211107/work/gcc-12-20211107/libstdc++-v3/libsupc++
-std=gnu++11 -D_GLIBCXX_SHARED -fno-implicit-templates -Wall -Wextra
-Wwrite-strings -Wcast-qual -Wabi=2 -fdiagnostics-show-location=once
-ffunction-sections -fdata-sections -frandom-seed=random.lo -g -O2
-D_GNU_SOURCE -c
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-12.0.0_alpha20211107/work/gcc-12-20211107/libstdc++-v3/src/c++11/random.cc
-fPIC -DPIC -D_GLIBCXX_SHARED -o random.o
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-12.0.0_alpha20211107/work/gcc-12-20211107/libstdc++-v3/src/c++11/random.cc:
In function 'unsigned int std::{anonymous}::__ppc_darn(void*)':
/var/tmp/portage/cross-powerpc-e300c3-linux-gnu/gcc-12.0.0_alpha20211107/work/gcc-12-20211107/libstdc++-v3/src/c++11/random.cc:147:22:
error: '__builtin_darn' was not declared in this scope; did you mean
'__builtin_tan'?
147 | uint64_t val = __builtin_darn();
| ^~~~~~~~~~~~~~
| __builtin_tan
Is the corresponding check really sufficient for PowerISA before 3.0?
