[Bug-ddrescue] Not compiling with uclibc++

[Rosen Penev]

Hello,

I recently tried to compile gddrescue 1.23 with uclibc++ but got the
following error:

In file included from
/home/mangix/devstuff/openwrt/staging_dir/target-mips_24kc_musl/usr/include/uClibc++/string:25:0,
                 from mapfile.cc:26:
/home/mangix/devstuff/openwrt/staging_dir/target-mips_24kc_musl/usr/include/uClibc++/vector:
In instantiation of 'void std::vector<T,
Allocator>::_insert_from_iterator(std::vector<T, Allocator>::iterator,
InputIterator, InputIterator) [with InputIterator = Sblock*; T =
Sblock; Allocator = std::allocator<Sblock>; std::vector<T,
Allocator>::iterator = Sblock*]':
/home/mangix/devstuff/openwrt/staging_dir/target-mips_24kc_musl/usr/include/uClibc++/vector:288:26:
  required from 'void std::vector<T,
Allocator>::_dispatch_insert(std::vector<T, Allocator>::iterator,
InputIterator, InputIterator, std::__false_type) [with InputIterator =
Sblock*; T = Sblock; Allocator = std::allocator<Sblock>;
std::vector<T, Allocator>::iterator = Sblock*]'
/home/mangix/devstuff/openwrt/staging_dir/target-mips_24kc_musl/usr/include/uClibc++/vector:297:20:
  required from 'void std::vector<T, Allocator>::insert(std::vector<T,
Allocator>::iterator, InputIterator, InputIterator) [with
InputIterator = Sblock*; T = Sblock; Allocator =
std::allocator<Sblock>; std::vector<T, Allocator>::iterator =
Sblock*]'
mapfile.cc:331:77:   required from here
/home/mangix/devstuff/openwrt/staging_dir/target-mips_24kc_musl/usr/include/uClibc++/vector:270:6:
error: no matching function for call to 'Sblock::Sblock()'
    T temp;
      ^~~~
In file included from mapfile.cc:30:0:
block.h:107:3: note: candidate: Sblock::Sblock(long long int, long
long int, Sblock::Status)
   Sblock( const long long p, const long long s, const Status st )
   ^~~~~~
block.h:107:3: note:   candidate expects 3 arguments, 0 provided
block.h:105:3: note: candidate: Sblock::Sblock(const Block&, Sblock::Status)
   Sblock( const Block & b, const Status st )
   ^~~~~~
block.h:105:3: note:   candidate expects 2 arguments, 0 provided
block.h:95:7: note: candidate: Sblock::Sblock(const Sblock&)
 class Sblock : public Block
       ^~~~~~
block.h:95:7: note:   candidate expects 1 argument, 0 provided
Makefile:64: recipe for target 'mapfile.o' failed
make[4]: *** [mapfile.o] Error 1

Anyone have any insight as to why it's failing?