for example, this is a problem that occurred when I installed the gmp extension locally
==================
All 3 tests passed
==================
Making check in cxx
/Library/Developer/CommandLineTools/usr/bin/make t-binary t-cast t-cxx11 t-headers t-iostream t-istream t-locale t-misc t-mix t-ops t-ops2 t-ops3 t-ostream t-prec t-ternary t-unary t-do-exceptions-work-at-all-with-this-compiler t-assign t-constr t-rand
gPP -DHAVE_CONFIG_H -I. -I../.. -I../.. -I../../tests -O2 -pedantic -fomit-frame-pointer -m64 -mtune=corei7 -march=corei7 -c -o t-binary.o t-binary.cc
/bin/sh ../../libtool --tag=CXX --mode=link gPP -O2 -pedantic -fomit-frame-pointer -m64 -mtune=corei7 -march=corei7 -o t-binary t-binary.o -L../../.libs ../../tests/libtests.la ../../libgmpxx.la ../../libgmp.la -lm
libtool: link: gPP -O2 -pedantic -fomit-frame-pointer -m64 -mtune=corei7 -march=corei7 -o .libs/t-binary t-binary.o -Wl,-bind_at_load -L../../.libs ../../tests/.libs/libtests.a ../../.libs/libgmpxx.dylib /Applications/MAMP/bin/php/php7.1.12/bin/gmp/.libs/libgmp.dylib ../../.libs/libgmp.dylib -lm
gPP -DHAVE_CONFIG_H -I. -I../.. -I../.. -I../../tests -O2 -pedantic -fomit-frame-pointer -m64 -mtune=corei7 -march=corei7 -c -o t-cast.o t-cast.cc
In file included from t-cast.cc:20:
In file included from ../../gmp.h:51:
/Library/Developer/CommandLineTools/usr/include/cPP/v1/cstddef:49:9: error: no member named "ptrdiff_t" in the global namespace
using ::ptrdiff_t;
~~^
In file included from t-cast.cc:21:
In file included from ../../gmpxx.h:29:
In file included from /Library/Developer/CommandLineTools/usr/include/cPP/v1/algorithm:643:
In file included from /Library/Developer/CommandLineTools/usr/include/cPP/v1/memory:650:
/Library/Developer/CommandLineTools/usr/include/cPP/v1/iterator:496:13: error: unknown type name "ptrdiff_t"
typedef ptrdiff_t difference_type;
^
/Library/Developer/CommandLineTools/usr/include/cPP/v1/iterator:529:56: error: unknown type name "ptrdiff_t"
template<class _Category, class _Tp, class _Distance = ptrdiff_t,
^
/Library/Developer/CommandLineTools/usr/include/cPP/v1/iterator:881:66: error: unknown type name "ptrdiff_t"
class _Traits = char_traits<_CharT>, class _Distance = ptrdiff_t>
^
/Library/Developer/CommandLineTools/usr/include/cPP/v1/iterator:881:54: error: template parameter missing a default argument
class _Traits = char_traits<_CharT>, class _Distance = ptrdiff_t>
^
/Library/Developer/CommandLineTools/usr/include/cPP/v1/iterator:881:27: note: previous default template argument defined here
class _Traits = char_traits<_CharT>, class _Distance = ptrdiff_t>
^
In file included from t-cast.cc:21:
In file included from ../../gmpxx.h:29:
In file included from /Library/Developer/CommandLineTools/usr/include/cPP/v1/algorithm:643:
In file included from /Library/Developer/CommandLineTools/usr/include/cPP/v1/memory:658:
/Library/Developer/CommandLineTools/usr/include/cPP/v1/atomic:1121:20: error: unknown type name "ptrdiff_t"
_Tp* fetch_add(ptrdiff_t __op, memory_order __m = memory_order_seq_cst)
^
/Library/Developer/CommandLineTools/usr/include/cPP/v1/atomic:1125:20: error: unknown type name "ptrdiff_t"
_Tp* fetch_add(ptrdiff_t __op, memory_order __m = memory_order_seq_cst) _NOEXCEPT
^
/Library/Developer/CommandLineTools/usr/include/cPP/v1/atomic:1128:20: error: unknown type name "ptrdiff_t"
_Tp* fetch_sub(ptrdiff_t __op, memory_order __m = memory_order_seq_cst)
^
/Library/Developer/CommandLineTools/usr/include/cPP/v1/atomic:1132:20: error: unknown type name "ptrdiff_t"
_Tp* fetch_sub(ptrdiff_t __op, memory_order __m = memory_order_seq_cst) _NOEXCEPT
^
/Library/Developer/CommandLineTools/usr/include/cPP/v1/atomic:1152:21: error: unknown type name "ptrdiff_t"
_Tp* operator+=(ptrdiff_t __op) volatile _NOEXCEPT {return fetch_add(__op) + __op;}
^
/Library/Developer/CommandLineTools/usr/include/cPP/v1/atomic:1154:21: error: unknown type name "ptrdiff_t"
_Tp* operator+=(ptrdiff_t __op) _NOEXCEPT {return fetch_add(__op) + __op;}
^
/Library/Developer/CommandLineTools/usr/include/cPP/v1/atomic:1156:21: error: unknown type name "ptrdiff_t"
_Tp* operator-=(ptrdiff_t __op) volatile _NOEXCEPT {return fetch_sub(__op) - __op;}
^
/Library/Developer/CommandLineTools/usr/include/cPP/v1/atomic:1158:21: error: unknown type name "ptrdiff_t"
_Tp* operator-=(ptrdiff_t __op) _NOEXCEPT {return fetch_sub(__op) - __op;}
^
/Library/Developer/CommandLineTools/usr/include/cPP/v1/atomic:1421:46: error: unknown type name "ptrdiff_t"
atomic_fetch_add(volatile atomic<_Tp*>* __o, ptrdiff_t __op) _NOEXCEPT
^
/Library/Developer/CommandLineTools/usr/include/cPP/v1/atomic:1429:37: error: unknown type name "ptrdiff_t"
atomic_fetch_add(atomic<_Tp*>* __o, ptrdiff_t __op) _NOEXCEPT
^
/Library/Developer/CommandLineTools/usr/include/cPP/v1/atomic:1463:55: error: unknown type name "ptrdiff_t"
atomic_fetch_add_explicit(volatile atomic<_Tp*>* __o, ptrdiff_t __op,
^
/Library/Developer/CommandLineTools/usr/include/cPP/v1/atomic:1472:46: error: unknown type name "ptrdiff_t"
atomic_fetch_add_explicit(atomic<_Tp*>* __o, ptrdiff_t __op, memory_order __m) _NOEXCEPT
^
/Library/Developer/CommandLineTools/usr/include/cPP/v1/atomic:1506:46: error: unknown type name "ptrdiff_t"
atomic_fetch_sub(volatile atomic<_Tp*>* __o, ptrdiff_t __op) _NOEXCEPT
^
/Library/Developer/CommandLineTools/usr/include/cPP/v1/atomic:1514:37: error: unknown type name "ptrdiff_t"
atomic_fetch_sub(atomic<_Tp*>* __o, ptrdiff_t __op) _NOEXCEPT
^
fatal error: too many errors emitted, stopping now [-ferror-limit=]
20 errors generated.
make[4]: *** [t-cast.o] Error 1
make[3]: *** [check-am] Error 2
make[2]: *** [check-recursive] Error 1
make[1]: *** [check-recursive] Error 1
make: *** [check] Error 2
this is a problem when executing make check. Is there something missing? Please give me your advice! My environment is MAMP mac integrated environment
the compilation is not successful, and the extension cannot be opened without getting the gmp.so file.