Created attachment 867281 [details] emerge --info and build log compressed with xz dev-qt/qtbase-6.5.2 appends -O2 after CXXFLAGS set in make.conf thus overriding -O3, below are just a couple of lines showing the issue, the rest are in the log [76/1514] /usr/bin/x86_64-pc-linux-gnu-g++ -DHAVE_CONFIG_H -DQT_BOOTSTRAPPED -DQT_EXPLICIT_QFILE_CONSTRUCTION_FROM_PATH -DQT_NO_CAST_FROM_ASCII -DQT_NO_CAST_TO_ASCII -DQT_NO_DEBUG -DQT_NO_FOREACH -DQT_NO_JAVA_STYLE_ITERATORS -DQT_NO_NARROWING_CONVERSIONS_IN_CONNECT -DQT_TYPESAFE_FLAGS -DQT_USE_QSTRINGBUILDER -DQT_VERSION_MAJOR=6 -DQT_VERSION_MINOR=5 -DQT_VERSION_PATCH=2 -DQT_VERSION_STR=\"6.5.2\" -D_LARGEFILE64_SOURCE -D_LARGEFILE_SOURCE -I/var/tmp/portage/dev-qt/qtbase-6.5.2/work/qtbase-everywhere-src-6.5.2_build/src/corelib/Core_autogen/include -I/var/tmp/portage/dev-qt/qtbase-6.5.2/work/qtbase-everywhere-src-6.5.2_build/include -I/var/tmp/portage/dev-qt/qtbase-6.5.2/work/qtbase-everywhere-src-6.5.2_build/include/QtCore -I/var/tmp/portage/dev-qt/qtbase-6.5.2/work/qtbase-everywhere-src-6.5.2/src/corelib -I/var/tmp/portage/dev-qt/qtbase-6.5.2/work/qtbase-everywhere-src-6.5.2_build/src/corelib -I/var/tmp/portage/dev-qt/qtbase-6.5.2/work/qtbase-everywhere-src-6.5.2_build/src/corelib/global -I/var/tmp/portage/dev-qt/qtbase-6.5.2/work/qtbase-everywhere-src-6.5.2_build/src/corelib/kernel -I/var/tmp/portage/dev-qt/qtbase-6.5.2/work/qtbase-everywhere-src-6.5.2/src/corelib/../3rdparty/tinycbor/src -I/var/tmp/portage/dev-qt/qtbase-6.5.2/work/qtbase-everywhere-src-6.5.2_build/include/QtCore/6.5.2 -I/var/tmp/portage/dev-qt/qtbase-6.5.2/work/qtbase-everywhere-src-6.5.2_build/include/QtCore/6.5.2/QtCore -I/var/tmp/portage/dev-qt/qtbase-6.5.2/work/qtbase-everywhere-src-6.5.2/src/corelib/../3rdparty/forkfd -I/var/tmp/portage/dev-qt/qtbase-6.5.2/work/qtbase-everywhere-src-6.5.2_build/src/corelib/.rcc -I/var/tmp/portage/dev-qt/qtbase-6.5.2/work/qtbase-everywhere-src-6.5.2/mkspecs/linux-g++ -I/usr/include/glib-2.0 -I/usr/lib64/glib-2.0/include -I/var/tmp/portage/dev-qt/qtbase-6.5.2/work/qtbase-everywhere-src-6.5.2/src/tools/bootstrap/../../corelib/global -I/var/tmp/portage/dev-qt/qtbase-6.5.2/work/qtbase-everywhere-src-6.5.2/src/tools/bootstrap/.. -I/var/tmp/portage/dev-qt/qtbase-6.5.2/work/qtbase-everywhere-src-6.5.2/src/tools/bootstrap/../../3rdparty/tinycbor/src -march=native -O3 -pipe -flto=auto -fno-semantic-interposition -Werror=odr -Werror=lto-type-mismatch -Werror=strict-aliasing -O2 -std=gnu++17 -fPIC -fvisibility=hidden -fvisibility-inlines-hidden -Wall -Wextra -ffunction-sections -fdata-sections -Wsuggest-override -MD -MT src/tools/bootstrap/CMakeFiles/Bootstrap.dir/__/__/corelib/global/qoperatingsystemversion.cpp.o -MF src/tools/bootstrap/CMakeFiles/Bootstrap.dir/__/__/corelib/global/qoperatingsystemversion.cpp.o.d -o src/tools/bootstrap/CMakeFiles/Bootstrap.dir/__/__/corelib/global/qoperatingsystemversion.cpp.o -c /var/tmp/portage/dev-qt/qtbase-6.5.2/work/qtbase-everywhere-src-6.5.2/src/corelib/global/qoperatingsystemversion.cpp [77/1514] /usr/bin/x86_64-pc-linux-gnu-g++ -DHAVE_CONFIG_H -DQT_BOOTSTRAPPED -DQT_EXPLICIT_QFILE_CONSTRUCTION_FROM_PATH -DQT_NO_CAST_FROM_ASCII -DQT_NO_CAST_TO_ASCII -DQT_NO_DEBUG -DQT_NO_FOREACH -DQT_NO_JAVA_STYLE_ITERATORS -DQT_NO_NARROWING_CONVERSIONS_IN_CONNECT -DQT_TYPESAFE_FLAGS -DQT_USE_QSTRINGBUILDER -DQT_VERSION_MAJOR=6 -DQT_VERSION_MINOR=5 -DQT_VERSION_PATCH=2 -DQT_VERSION_STR=\"6.5.2\" -D_LARGEFILE64_SOURCE -D_LARGEFILE_SOURCE -I/var/tmp/portage/dev-qt/qtbase-6.5.2/work/qtbase-everywhere-src-6.5.2_build/src/corelib/Core_autogen/include -I/var/tmp/portage/dev-qt/qtbase-6.5.2/work/qtbase-everywhere-src-6.5.2_build/include -I/var/tmp/portage/dev-qt/qtbase-6.5.2/work/qtbase-everywhere-src-6.5.2_build/include/QtCore -I/var/tmp/portage/dev-qt/qtbase-6.5.2/work/qtbase-everywhere-src-6.5.2/src/corelib -I/var/tmp/portage/dev-qt/qtbase-6.5.2/work/qtbase-everywhere-src-6.5.2_build/src/corelib -I/var/tmp/portage/dev-qt/qtbase-6.5.2/work/qtbase-everywhere-src-6.5.2_build/src/corelib/global -I/var/tmp/portage/dev-qt/qtbase-6.5.2/work/qtbase-everywhere-src-6.5.2_build/src/corelib/kernel -I/var/tmp/portage/dev-qt/qtbase-6.5.2/work/qtbase-everywhere-src-6.5.2/src/corelib/../3rdparty/tinycbor/src -I/var/tmp/portage/dev-qt/qtbase-6.5.2/work/qtbase-everywhere-src-6.5.2_build/include/QtCore/6.5.2 -I/var/tmp/portage/dev-qt/qtbase-6.5.2/work/qtbase-everywhere-src-6.5.2_build/include/QtCore/6.5.2/QtCore -I/var/tmp/portage/dev-qt/qtbase-6.5.2/work/qtbase-everywhere-src-6.5.2/src/corelib/../3rdparty/forkfd -I/var/tmp/portage/dev-qt/qtbase-6.5.2/work/qtbase-everywhere-src-6.5.2_build/src/corelib/.rcc -I/var/tmp/portage/dev-qt/qtbase-6.5.2/work/qtbase-everywhere-src-6.5.2/mkspecs/linux-g++ -I/usr/include/glib-2.0 -I/usr/lib64/glib-2.0/include -I/var/tmp/portage/dev-qt/qtbase-6.5.2/work/qtbase-everywhere-src-6.5.2/src/tools/bootstrap/../../corelib/global -I/var/tmp/portage/dev-qt/qtbase-6.5.2/work/qtbase-everywhere-src-6.5.2/src/tools/bootstrap/.. -I/var/tmp/portage/dev-qt/qtbase-6.5.2/work/qtbase-everywhere-src-6.5.2/src/tools/bootstrap/../../3rdparty/tinycbor/src -march=native -O3 -pipe -flto=auto -fno-semantic-interposition -Werror=odr -Werror=lto-type-mismatch -Werror=strict-aliasing -O2 -std=gnu++17 -fPIC -fvisibility=hidden -fvisibility-inlines-hidden -Wall -Wextra -ffunction-sections -fdata-sections -Wsuggest-override -MD -MT src/tools/bootstrap/CMakeFiles/Bootstrap.dir/__/__/corelib/global/qtenvironmentvariables.cpp.o -MF src/tools/bootstrap/CMakeFiles/Bootstrap.dir/__/__/corelib/global/qtenvironmentvariables.cpp.o.d -o src/tools/bootstrap/CMakeFiles/Bootstrap.dir/__/__/corelib/global/qtenvironmentvariables.cpp.o -c /var/tmp/portage/dev-qt/qtbase-6.5.2/work/qtbase-everywhere-src-6.5.2/src/corelib/global/qtenvironmentvariables.cpp
*** This bug has been marked as a duplicate of bug 911822 ***
