as per $summary: media-libs/libzen-0.4.20 /bin/sh ./libtool --tag=CXX --mode=compile x86_64-pc-linux-gnu-g++ -DPACKAGE_NAME=\"\" -DPACKAGE_TARNAME=\"\" -DPACKAGE_VERSION=\"\" -DPACKAGE_STRING=\"\" -DPACKAGE_BUGREPORT=\"\" -DPACKAGE_URL=\"\" -DPACKAGE=\"ZenLib\" -DVERSION=\"0\" -DSTDC_HEADERS=1 -DHAVE_SYS_TYPES_H=1 -DHAVE_SYS_STAT_H=1 -DHAVE_STDLIB_H=1 -DHAVE_STRING_H=1 -DHAVE_MEMORY_H=1 -DHAVE_STRINGS_H=1 -DHAVE_INTTYPES_H=1 -DHAVE_STDINT_H=1 -DHAVE_UNISTD_H=1 -DHAVE_DLFCN_H=1 -DLT_OBJDIR=\".libs/\" -I. -I../../../Source -march=native -O2 -DUNICODE -D_LARGE_FILES -D_FILE_OFFSET_BITS=64 -fPIC -O0 -g -Wall -W -Wundef -Wcast-qual -Wno-ctor-dtor-privacy -c -o MemoryDebug.lo `test -f '../../../Source/ZenLib/MemoryDebug.cpp' || echo './'`../../../Source/ZenLib/MemoryDebug.cpp media-libs/libmediainfo-0.7.45 libtool: compile: x86_64-pc-linux-gnu-g++ -DPACKAGE_NAME=\"\" -DPACKAGE_TARNAME=\"\" -DPACKAGE_VERSION=\"\" -DPACKAGE_STRING=\"\" -DPACKAGE_BUGREPORT=\"\" -DPACKAGE_URL=\"\" -DPACKAGE=\"libmediainfo\" -DVERSION=\"0\" -DSTDC_HEADERS=1 -DHAVE_SYS_TYPES_H=1 -DHAVE_SYS_STAT_H=1 -DHAVE_STDLIB_H=1 -DHAVE_STRING_H=1 -DHAVE_MEMORY_H=1 -DHAVE_STRINGS_H=1 -DHAVE_INTTYPES_H=1 -DHAVE_STDINT_H=1 -DHAVE_UNISTD_H=1 -DHAVE_DLFCN_H=1 -DLT_OBJDIR=\".libs/\" -DHAVE_ZLIB_H=1 -I. -I../../../Source -I../../../../ZenLib/Source -march=native -O2 -I/usr/include/ -I/usr/include/glib-2.0 -I/usr/lib64/glib-2.0/include -DUNICODE -fPIC -O0 -g -Wall -W -Wundef -Wcast-qual -Wno-ctor-dtor-privacy -c ../../../Source/MediaInfo/File__Analyze_Buffer_MinimizeSize.cpp -o File__Analyze_Buffer_MinimizeSize.o >/dev/null 2>&1 media-video/mediainfo-0.7.45 x86_64-pc-linux-gnu-g++ -DPACKAGE_NAME=\"\" -DPACKAGE_TARNAME=\"\" -DPACKAGE_VERSION=\"\" -DPACKAGE_STRING=\"\" -DPACKAGE_BUGREPORT=\"\" -DPACKAGE_URL=\"\" -DPACKAGE=\"MediaInfo\" -DVERSION=\"0\" -DSTDC_HEADERS=1 -DHAVE_SYS_TYPES_H=1 -DHAVE_SYS_STAT_H=1 -DHAVE_STDLIB_H=1 -DHAVE_STRING_H=1 -DHAVE_MEMORY_H=1 -DHAVE_STRINGS_H=1 -DHAVE_INTTYPES_H=1 -DHAVE_STDINT_H=1 -DHAVE_UNISTD_H=1 -DHAVE_DLFCN_H=1 -DLT_OBJDIR=\".libs/\" -DUNICODE=1 -I. -I../../../Source -I../../../../MediaInfoLib/Source -I../../../../ZenLib/Source -march=native -O2 -O0 -g -Wall -W -Wundef -Wcast-qual -Wno-ctor-dtor-privacy -c -o CommandLine_Parser.o `test -f '../../../Source/CLI/CommandLine_Parser.cpp' || echo './'`../../../Source/CLI/CommandLine_Parser.cpp
The debug use flag has been dropped in all three packages for ~arch versions.