https://go-review.googlesource.com/c/go/+/322614/


** Also affects: golang
   Importance: Undecided
       Status: New

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https://bugs.launchpad.net/bugs/1931383

Title:
  ipp-usb ftbfs with lto

Status in Go:
  New
Status in golang-1.16 package in Ubuntu:
  New
Status in ipp-usb package in Ubuntu:
  New

Bug description:
  ipp-usb ftbfs with lto, apparently not seen on Fedora builds.

  github.com/OpenPrinting/ipp-usb
  # github.com/OpenPrinting/ipp-usb
  ../../../../tmp/go-build3834344537/b001/cgo-generated-wrappers:1:13: error: 
function ‘avahiClientCallback’ redeclared as variable
  ../../../../tmp/go-build3834344537/b001/_cgo_export.c:24:6: note: previously 
declared here
     24 | void avahiClientCallback(AvahiClient* client, AvahiClientState state, 
void* _)
        |      ^
  ../../../../tmp/go-build3834344537/b001/cgo-generated-wrappers:4:13: error: 
function ‘avahiEntryGroupCallback’ redeclared as variable
  ../../../../tmp/go-build3834344537/b001/_cgo_export.c:46:6: note: previously 
declared here
     46 | void avahiEntryGroupCallback(AvahiEntryGroup* egroup, 
AvahiEntryGroupState state, void* _)
        |      ^
  ../../../../tmp/go-build3834344537/b001/cgo-generated-wrappers:7:13: error: 
function ‘libusbHotplugCallback’ redeclared as variable
  ../../../../tmp/go-build3834344537/b001/_cgo_export.c:68:5: note: previously 
declared here
     68 | int libusbHotplugCallback(libusb_context* ctx, libusb_device* dev, 
libusb_hotplug_event event, void* p)
        |     ^
  ../../../../tmp/go-build3834344537/b001/_cgo_export.c:21:13: error: variable 
‘_cgoexp_73d50ba221cf_avahiClientCallback’ redeclared as function
     21 | extern void _cgoexp_73d50ba221cf_avahiClientCallback(void *);
        |             ^
  ../../../../tmp/go-build3834344537/b001/cgo-generated-wrappers:10:5: note: 
previously declared here
  ../../../../tmp/go-build3834344537/b001/_cgo_export.c:43:13: error: variable 
‘_cgoexp_73d50ba221cf_avahiEntryGroupCallback’ redeclared as function
     43 | extern void _cgoexp_73d50ba221cf_avahiEntryGroupCallback(void *);
        |             ^
  ../../../../tmp/go-build3834344537/b001/cgo-generated-wrappers:11:5: note: 
previously declared here
  ../../../../tmp/go-build3834344537/b001/_cgo_export.c:65:13: error: variable 
‘_cgoexp_73d50ba221cf_libusbHotplugCallback’ redeclared as function
     65 | extern void _cgoexp_73d50ba221cf_libusbHotplugCallback(void *);
        |             ^
  ../../../../tmp/go-build3834344537/b001/cgo-generated-wrappers:12:5: note: 
previously declared here
  lto1: fatal error: errors during merging of translation units
  compilation terminated.
  lto-wrapper: fatal error: /usr/bin/gcc returned 1 exit status
  compilation terminated.
  /usr/bin/ld: error: lto-wrapper failed
  collect2: error: ld returned 1 exit status

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