/home/andy/bitcoin4/depends/work/build/x86_64-pc-linux-gnu/fontconfig/2.12.4-5ee293e84f5/missing: line 81: gperf: command not found
WARNING: 'gperf' is missing on your system.
         You might have modified some files without having the proper
         tools for further handling them.  Check the 'README' file, it
         often tells you about the needed prerequisites for installing
         this package.  You may also peek at any GNU archive site, in
         case some other package contains this missing 'gperf' program.

make[4]: Entering directory '/home/andy/bitcoin4/depends/work/build/x86_64-pc-linux-gnu/fontconfig/2.12.4-5ee293e84f5/src'
  CC       fcatomic.lo
  CC       fcblanks.lo
  CC       fccache.lo
  CC       fccfg.lo
  CC       fccharset.lo
  CC       fccompat.lo
  CC       fcdefault.lo
  CC       fcdbg.lo
  CC       fcdir.lo
  CC       fcformat.lo
  CC       fcfreetype.lo
  CC       fcinit.lo
  CC       fcfs.lo
  CC       fclang.lo
  CC       fclist.lo
  CC       fcmatch.lo
  CC       fcmatrix.lo
  CC       fcname.lo
  CC       fcobjs.lo
  CC       fcpat.lo
  CC       fcrange.lo
In file included from fcobjs.c:33:0:
fcobjshash.gperf:28:1: error: conflicting types for ‘FcObjectTypeHash’
 "aspect",FC_ASPECT_OBJECT
 ^~~~~~~~~~~~~~~~
fcobjs.c:28:1: note: previous declaration of ‘FcObjectTypeHash’ was here
 FcObjectTypeHash (register const char *str, register FC_GPERF_SIZE_T len);
 ^~~~~~~~~~~~~~~~
In file included from fcobjs.c:33:0:
fcobjshash.gperf:172:1: error: conflicting types for ‘FcObjectTypeLookup’
fcobjs.c:31:1: note: previous declaration of ‘FcObjectTypeLookup’ was here
 FcObjectTypeLookup (register const char *str, register FC_GPERF_SIZE_T len);
 ^~~~~~~~~~~~~~~~~~
Makefile:642: recipe for target 'fcobjs.lo' failed
make[4]: *** [fcobjs.lo] Error 1

/home/ubuntu/build/bitcoin/depends/work/build/i686-pc-linux-gnu/fontconfig/2.12.4-e57b06ea870/missing: line 81: gperf: command not found
WARNING: 'gperf' is missing on your system.