multiple definition of `pxa260Framebuffer'

[mase76]

When compiling for Retroarch on Debian Bullseye, I get the following error:
** BUILDING mu_libretro.so FOR PLATFORM unix ** cc -fPIC -shared -Wl,--version-script=build/link.T -I./libretro-common/include -o mu_libretro.so ./libretro.o ./cursors.o ./../src/emulator.o ./../src/m5XXBus.o ./../src/dbvz.o ./../src/flx68000.o ./../src/sed1376.o ./../src/ads7846.o ./../src/pdiUsbD12.o ./../src/sdCard.o ./../src/silkscreen.o ./../src/audio/blip_buf.o ./../src/m68k/m68kops.o ./../src/m68k/m68kopnz.o ./../src/m68k/m68kopdm.o ./../src/m68k/m68kopac.o ./../src/m68k/m68kcpu.o ./../src/fileLauncher/launcher.o ./../src/pxa260/pxa260_DMA.o ./../src/pxa260/pxa260_DSP.o ./../src/pxa260/pxa260_GPIO.o ./../src/pxa260/pxa260_IC.o ./../src/pxa260/pxa260_LCD.o ./../src/pxa260/pxa260_PwrClk.o ./../src/pxa260/pxa260_RTC.o ./../src/pxa260/pxa260_TIMR.o ./../src/pxa260/pxa260_UART.o ./../src/pxa260/pxa260I2c.o ./../src/pxa260/pxa260Memctrl.o ./../src/pxa260/pxa260Timing.o ./../src/pxa260/pxa260Ssp.o ./../src/pxa260/pxa260Udc.o ./../src/pxa260/pxa260.o ./../src/armv5te/emuVarPool.o ./../src/armv5te/mem.o ./../src/armv5te/mmu.o ./../src/tps65010.o ./../src/tsc2101.o ./../src/w86l488.o ./../src/armv5te/os/os-linux.o ./../src/armv5te/asmcode.o ./libretro-common/compat/compat_strl.o ./libretro-common/compat/compat_posix_string.o ./libretro-common/compat/fopen_utf8.o ./libretro-common/encodings/encoding_utf.o ./libretro-common/memmap/memmap.o ./libretro-common/streams/file_stream.o ./libretro-common/string/stdstring.o ./libretro-common/vfs/vfs_implementation.o ./../src/armv5te/arm_interpreter.o ./../src/armv5te/thumb_interpreter.o ./../src/armv5te/cpu.o ./../src/armv5te/coproc.o -lm /usr/bin/ld: ./../src/pxa260/pxa260.o:(.bss+0x128): multiple definition of pxa260Framebuffer'; ./../src/pxa260/pxa260_LCD.o:(.bss+0x0): first defined here
collect2: error: ld returned 1 exit status
`

[parkerlreed]

Same here on Arch Linux

gcc 10.2.0-1

** BUILDING mu_libretro.so FOR PLATFORM unix **
cc -fPIC -shared -Wl,--version-script=build/link.T -I./libretro-common/include  -o mu_libretro.so ./libretro.o ./cursors.o ./../src/emulator.o ./../src/m5XXBus.o ./../src/dbvz.o ./../src/flx68000.o ./../src/sed1376.o ./../src/ads7846.o ./../src/pdiUsbD12.o ./../src/sdCard.o ./../src/silkscreen.o ./../src/audio/blip_buf.o ./../src/m68k/m68kops.o ./../src/m68k/m68kopnz.o ./../src/m68k/m68kopdm.o ./../src/m68k/m68kopac.o ./../src/m68k/m68kcpu.o ./../src/fileLauncher/launcher.o ./../src/pxa260/pxa260_DMA.o ./../src/pxa260/pxa260_DSP.o ./../src/pxa260/pxa260_GPIO.o ./../src/pxa260/pxa260_IC.o ./../src/pxa260/pxa260_LCD.o ./../src/pxa260/pxa260_PwrClk.o ./../src/pxa260/pxa260_RTC.o ./../src/pxa260/pxa260_TIMR.o ./../src/pxa260/pxa260_UART.o ./../src/pxa260/pxa260I2c.o ./../src/pxa260/pxa260Memctrl.o ./../src/pxa260/pxa260Timing.o ./../src/pxa260/pxa260Ssp.o ./../src/pxa260/pxa260Udc.o ./../src/pxa260/pxa260.o ./../src/armv5te/emuVarPool.o ./../src/armv5te/mem.o ./../src/armv5te/mmu.o ./../src/tps65010.o ./../src/tsc2101.o ./../src/w86l488.o ./../src/armv5te/os/os-linux.o ./../src/armv5te/asmcode.o ./libretro-common/compat/compat_strl.o ./libretro-common/compat/compat_posix_string.o ./libretro-common/compat/fopen_utf8.o ./libretro-common/encodings/encoding_utf.o ./libretro-common/memmap/memmap.o ./libretro-common/streams/file_stream.o ./libretro-common/string/stdstring.o ./libretro-common/vfs/vfs_implementation.o ./../src/armv5te/arm_interpreter.o ./../src/armv5te/thumb_interpreter.o ./../src/armv5te/cpu.o ./../src/armv5te/coproc.o  -lm
/usr/bin/ld: ./../src/pxa260/pxa260.o:(.bss+0x128): multiple definition of `pxa260Framebuffer'; ./../src/pxa260/pxa260_LCD.o:(.bss+0x0): first defined here
collect2: error: ld returned 1 exit status
make: *** [Makefile.libretro:531: mu_libretro.so] Error 1

[mase76]

Serms to be an issue with newer versions of gcc. In Debian Buster with gcc8 it compiles.

[Nocosix]

This is caused by gcc 10 changing its default behavior from -fcommon to -fno-common
I added -fcommon to QMAKE_CFLAGS, QMAKE_CXXFLAGS and QMAKE_LFLAGS under linux-g++ in my Mu.pro file as a workaround, and it successfully compiled.