directfb> ../../lib/direct/util.h:223:6: warning: 'register' storage class specifier is deprecated and incompatible with C++17 [-Wdeprecated-register]
directfb> 223 | register int ret = 0;
directfb> | ^~~~~~~~
directfb> ../../lib/direct/util.h:328:6: warning: 'register' storage class specifier is deprecated and incompatible with C++17 [-Wdeprecated-register]
directfb> 328 | register int ret = 0;
directfb> | ^~~~~~~~
directfb> In file included from String.cpp:37:
directfb> ./String.h:126:51: error: format argument not a string type
directfb> 126 | PrintF( const _CharT *format, ... ) D_FORMAT_PRINTF(2);
directfb> | ~~~~~~~~~~~~~~~~~~~~ ^ ~
directfb> ../../lib/direct/util.h:102:51: note: expanded from macro 'D_FORMAT_PRINTF'
directfb> 102 | #define D_FORMAT_PRINTF(n) __attribute__((__format__ (__printf__, n, n+1)))
directfb> | ^ ~
directfb> In file included from String.cpp:37:
directfb> ./String.h:131:55: error: format argument not a string type
directfb> 131 | static StringBase F( const _CharT *format, ... ) D_FORMAT_PRINTF(1);
directfb> | ~~~~~~~~~~~~~~~~~~~~ ^ ~
directfb> ../../lib/direct/util.h:102:51: note: expanded from macro 'D_FORMAT_PRINTF'
directfb> 102 | #define D_FORMAT_PRINTF(n) __attribute__((__format__ (__printf__, n, n+1)))
directfb> | ^ ~
directfb> String.cpp:111:19: warning: variable length arrays in C++ are a Clang extension [-Wvla-cxx-extension]
directfb> 111 | char buf[stack_buffer];
directfb> | ^~~~~~~~~~~~
directfb> String.cpp:111:19: note: function parameter 'stack_buffer' with unknown value cannot be used in a constant expression
directfb> String.cpp:108:58: note: declared here
directfb> 108 | String::PrintF( const char *format, va_list args, size_t stack_buffer )
directfb> | ^
directfb> 3 warnings and 2 errors generated.
directfb> make[4]: *** [Makefile:918: String.lo] Error 1
directfb> make[4]: Leaving directory '/build/source/lib/direct'
directfb> make[3]: *** [Makefile:975: all-recursive] Error 1
directfb> make[3]: Leaving directory '/build/source/lib/direct'
directfb> make[2]: *** [Makefile:513: all-recursive] Error 1
directfb> make[2]: Leaving directory '/build/source/lib'
directfb> make[1]: *** [Makefile:704: all-recursive] Error 1
directfb> make[1]: Leaving directory '/build/source'
directfb> make: *** [Makefile:572: all] Error 2
