#/root/tmp/qtwebkit-5.212.0-alpha4/Source/WTF/wtf/MetaAllocator.cpp: In member function 'void WTF::MetaAllocator::decrementPageOccupancy(void*, size_t)':
#/root/tmp/qtwebkit-5.212.0-alpha4/Source/WTF/wtf/MetaAllocator.cpp:427:1: error: unable to find a register to spill in class 'R0_REGS'
#  427 | }
#      | ^
#/root/tmp/qtwebkit-5.212.0-alpha4/Source/WTF/wtf/MetaAllocator.cpp:427:1: error: this is the insn:
#(insn 374 892 379 26 (parallel [
#            (set (subreg:SI (reg:QI 427) 0)
#                (unspec_volatile:SI [
#                        (mem/v:QI (reg/f:SI 7 r7 [orig:229 _115 ] [229]) [-1  S1 A8])
#                        (reg:QI 429)
#                        (reg:QI 431)
#                    ] UNSPECV_CMPXCHG_1))
#            (set (mem/v:QI (reg/f:SI 7 r7 [orig:229 _115 ] [229]) [-1  S1 A8])
#                (unspec_volatile:QI [
#                        (const_int 0 [0])
#                    ] UNSPECV_CMPXCHG_2))
#            (set (reg:SI 147 t)
#                (unspec_volatile:SI [
#                        (const_int 0 [0])
#                    ] UNSPECV_CMPXCHG_3))
#            (clobber (scratch:SI))
#            (clobber (reg:SI 0 r0))
#            (clobber (reg:SI 1 r1))
#        ]) "/usr/include/c++/11.2.0/bits/atomic_base.h":522:36 405 {atomic_compare_and_swapqi_soft_gusa}
#     (expr_list:REG_DEAD (reg:QI 431)
#        (expr_list:REG_DEAD (reg:QI 429)
#            (expr_list:REG_UNUSED (reg:QI 427)
#                (expr_list:REG_UNUSED (reg:SI 1 r1)
#                    (expr_list:REG_UNUSED (reg:SI 0 r0)
#                        (nil)))))))

cd $TMP/qtwebkit-5.212.0-alpha4/qtwebkit-build/Source/WTF/wtf && /usr/bin/c++ -DBUILDING_QT__=1 -DBUILDING_WITH_CMAKE=1 -DBUILDING_WTF -DHAVE_CONFIG_H=1 -DQT_ASCII_CAST_WARNINGS -DQT_CORE_LIB -DQT_DEPRECATED_WARNINGS -DQT_DISABLE_DEPRECATED_BEFORE=0x050000 -DQT_NO_CAST_TO_ASCII -DQT_NO_DEBUG -DQT_NO_DYNAMIC_CAST -DQT_NO_EXCEPTIONS -DQT_USE_QSTRINGBUILDER -I$TMP/qtwebkit-5.212.0-alpha4/qtwebkit-build/Source/WTF/wtf -I$TMP/qtwebkit-5.212.0-alpha4/Source/WTF/wtf -I$TMP/qtwebkit-5.212.0-alpha4/Source/bmalloc -I$TMP/qtwebkit-5.212.0-alpha4/Source/WTF -I$TMP/qtwebkit-5.212.0-alpha4/Source/WTF/wtf/dtoa -I$TMP/qtwebkit-5.212.0-alpha4/Source/WTF/wtf/text -I$TMP/qtwebkit-5.212.0-alpha4/Source/WTF/wtf/threads -I$TMP/qtwebkit-5.212.0-alpha4/Source/WTF/wtf/unicode -I$TMP/qtwebkit-5.212.0-alpha4/Source/ThirdParty -I$TMP/qtwebkit-5.212.0-alpha4/qtwebkit-build -I$TMP/qtwebkit-5.212.0-alpha4/qtwebkit-build/DerivedSources -isystem /usr/include/qt5 -isystem /usr/include/qt5/QtCore -isystem /usr/lib/qt5/mkspecs/linux-g++ -isystem /usr/include/glib-2.0 -isystem /usr/lib/glib-2.0/include -fvisibility=hidden -fvisibility-inlines-hidden -O1 -fpermissive -fno-strict-aliasing -DU_DEFINE_FALSE_AND_TRUE=1 -fno-exceptions -fno-strict-aliasing -fno-rtti -std=c++11 -Wno-expansion-to-defined -Wall -Wextra -Wcast-align -Wformat-security -Wmissing-format-attribute -Wpointer-arith -Wundef -Wwrite-strings -fPIC  -fPIC -MD -MT Source/WTF/wtf/CMakeFiles/WTF.dir/MetaAllocator.cpp.o -MF CMakeFiles/WTF.dir/MetaAllocator.cpp.o.d -o CMakeFiles/WTF.dir/MetaAllocator.cpp.o -c $TMP/qtwebkit-5.212.0-alpha4/Source/WTF/wtf/MetaAllocator.cpp