integer: suppress false-positive GCC 14.3.1 stringop-overflow/array-bounds

arm-none-eabi-gcc 14.3.1 (arm-gnu-toolchain-14.3.rel1) misdiagnoses the
std::copy byte-transfer in integer_storage::integer_storage(T, endian)
and to_integral() as overflowing when SIZE == 1, claiming a memmove of
"between 2 and 2147483647 bytes" into a 1-byte destination. The copy
count is always a compile-time constant bounded by min(sizeof(T), SIZE),
so this is a compiler false positive, not a real overflow.

Wrap the transfer logic in both functions with a GCC-only
diagnostic push/pop that ignores -Wstringop-overflow and
-Warray-bounds.

Signed-off-by: Benedek Kupper <kupper.benedek@gmail.com>

Author: benedekkupper

bitfilled/bitfilled/integer.hpp

@@ -88,6 +88,11 @@ struct integer_storage : public std::array<sized_unsigned_t<1>, SIZE>
         }
 #endif
         // transfer the bytes to the correct position
+#if defined(__GNUC__) && !defined(__clang__)
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wstringop-overflow"
+#pragma GCC diagnostic ignored "-Warray-bounds"
+#endif
         constexpr long size_diff = (long)sizeof(T) - (long)SIZE;
         constexpr auto min_size = std::min(sizeof(T), SIZE);
         if (endianness == std::endian::little)
@@ -111,6 +116,9 @@ struct integer_storage : public std::array<sized_unsigned_t<1>, SIZE>
                           this->data() - size_diff);
             }
         }
+#if defined(__GNUC__) && !defined(__clang__)
+#pragma GCC diagnostic pop
+#endif
     }
 
     template <std::integral T>
@@ -126,6 +134,11 @@ struct integer_storage : public std::array<sized_unsigned_t<1>, SIZE>
         }
 
         // transfer the bytes to the correct position
+#if defined(__GNUC__) && !defined(__clang__)
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wstringop-overflow"
+#pragma GCC diagnostic ignored "-Warray-bounds"
+#endif
         constexpr long size_diff = (long)SIZE - (long)sizeof(T);
         constexpr auto min_size = std::min(sizeof(T), SIZE);
         if (endianness == std::endian::little)
@@ -148,6 +161,9 @@ struct integer_storage : public std::array<sized_unsigned_t<1>, SIZE>
                 std::copy(this->data(), this->data() + SIZE, value_repr.data() - size_diff);
             }
         }
+#if defined(__GNUC__) && !defined(__clang__)
+#pragma GCC diagnostic pop
+#endif
 
         // if not native endianness, reverse byte order
 #if !__cpp_lib_byteswap