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While updating nghttp2-tools to version under MacPorts 1.62.0 CI ran into the following errors on all supported OS versions (Note: the nghttp2 library complied correctly):
/usr/bin/clang++ -std=gnu++11 -DHAVE_CONFIG_H -I. -I.. -DPKGDATADIR='"/opt/local/share/nghttp2"' -DPKGLIBDIR='"/opt/local/lib/nghttp2"' -I../lib/includes -I../lib/includes -I../lib -I../third-party -I../third-party/llhttp/include -I/opt/local/include/libxml2 -I/opt/local/include/openssl -I/opt/local/include -D__APPLE_USE_RFC_3542 -DHAVE_CONFIG_H -I/opt/local/include -isysroot/Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk -pipe -Os -stdlib=libc++ -isysroot/Library/Developer/CommandLineTools/SDKs/MacOSX10.15.sdk -arch x86_64 -MT nghttp.o -MD -MP -MF $depbase.Tpo -c -o nghttp.o nghttp.cc &&\
mv -f $depbase.Tpo $depbase.Po
In file included from http2.cc:25:
In file included from ./http2.h:40:
In file included from ./util.h:52:
/opt/local/include/ev.h:548:18: warning: mangled name of 'ev_set_allocator' will change in C++17 due to non-throwing exception specification in function signature [-Wc++17-compat-mangling]
EV_API_DECL void ev_set_allocator (void *(*cb)(void *ptr, long size) EV_NOEXCEPT) EV_NOEXCEPT;
^
/opt/local/include/ev.h:554:18: warning: mangled name of 'ev_set_syserr_cb' will change in C++17 due to non-throwing exception specification in function signature [-Wc++17-compat-mangling]
EV_API_DECL void ev_set_syserr_cb (void (*cb)(const char *msg) EV_NOEXCEPT) EV_NOEXCEPT;
^
/opt/local/include/ev.h:675:18: warning: mangled name of 'ev_set_loop_release_cb' will change in C++17 due to non-throwing exception specification in function signature [-Wc++17-compat-mangling]
EV_API_DECL void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P) EV_NOEXCEPT, void (*acquire)(EV_P) EV_NOEXCEPT) EV_NOEXCEPT;
^
In file included from util.cc:25:
In file included from ./util.h:52:
/opt/local/include/ev.h:548:18: warning: mangled name of 'ev_set_allocator' will change in C++17 due to non-throwing exception specification in function signature [-Wc++17-compat-mangling]
EV_API_DECL void ev_set_allocator (void *(*cb)(void *ptr, long size) EV_NOEXCEPT) EV_NOEXCEPT;
^
/opt/local/include/ev.h:554:18: warning: mangled name of 'ev_set_syserr_cb' will change in C++17 due to non-throwing exception specification in function signature [-Wc++17-compat-mangling]
EV_API_DECL void ev_set_syserr_cb (void (*cb)(const char *msg) EV_NOEXCEPT) EV_NOEXCEPT;
^
/opt/local/include/ev.h:675:18: warning: mangled name of 'ev_set_loop_release_cb' will change in C++17 due to non-throwing exception specification in function signature [-Wc++17-compat-mangling]
EV_API_DECL void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P) EV_NOEXCEPT, void (*acquire)(EV_P) EV_NOEXCEPT) EV_NOEXCEPT;
^
In file included from http2.cc:25:
In file included from ./http2.h:40:
In file included from ./util.h:57:
./template.h:61:27: error: no template named 'invoke_result_t' in namespace 'std'
using ResultType = std::invoke_result_t<F, T...>;
~~~~~^
./template.h:62:17: error: use of undeclared identifier 'ResultType'
std::function<ResultType()> f;
^
./template.h:83:19: error: no member named 'exchange' in namespace 'std'
: head{std::exchange(other.head, nullptr)},
~~~~~^
In file included from util.cc:25:
In file included from ./util.h:57:
./template.h:61:27: error: no template named 'invoke_result_t' in namespace 'std'
using ResultType = std::invoke_result_t<F, T...>;
~~~~~^
./template.h:84:19: ./template.h:62:17: error: use of undeclared identifier 'ResultType'
std::function<ResultType()> f;
^
error: no member named 'exchange' in namespace 'std'
tail{std::exchange(other.tail, nullptr)},
~~~~~^
./template.h:85:18: error: no member named 'exchange' in namespace 'std'
len{std::exchange(other.len, 0)} {}
~~~~~^
./template.h:83:19: error: no member named 'exchange' in namespace 'std'
: head{std::exchange(other.head, nullptr)},
~~~~~^
./template.h:91:17: error: no member named 'exchange' in namespace 'std'
head = std::exchange(other.head, nullptr);
~~~~~^
./template.h:84:19: error: no member named 'exchange' in namespace 'std'
tail{std::exchange(other.tail, nullptr)},
~~~~~^
./template.h:92:17: error: no member named 'exchange' in namespace 'std'
tail = std::exchange(other.tail, nullptr);
~~~~~^
./template.h:85:18: error: no member named 'exchange' in namespace 'std'
len{std::exchange(other.len, 0)} {}
~~~~~^
./template.h./template.h:93:16::91:17: error: no member named 'exchange' in namespace 'std'
head = std::exchange(other.head, nullptr);
~~~~~^
error: no member named 'exchange' in namespace 'std'
len = std::exchange(other.len, 0);
~~~~~^
./template.h:92:17: error: no member named 'exchange' in namespace 'std'
tail = std::exchange(other.tail, nullptr);
~~~~~^
./template.h:175:19: error: no member named 'make_unique' in namespace 'std'
auto res = std::make_unique<char[]>(last - first + 1);
~~~~~^
./template.h:175:35: error: expected '(' for function-style cast or type construction
auto res = std::make_unique<char[]>(last - first + 1);
~~~~^
./template.h:93:16: error: no member named 'exchange' in namespace 'std'
len = std::exchange(other.len, 0);
~~~~~^
./template.h:241:3: error: destructor cannot be marked constexpr
constexpr ~ImmutableString() {
^
./template.h:247:30: warning: 'constexpr' non-static member function will not be implicitly 'const' in C++14; add 'const' to avoid a change in behavior [-Wconstexpr-not-const]
constexpr ImmutableString &operator=(const ImmutableString &other) {
^
const
./template.h:258:30: warning: 'constexpr' non-static member function will not be implicitly 'const' in C++14; add 'const' to avoid a change in behavior [-Wconstexpr-not-const]
constexpr ImmutableString &operator=(ImmutableString &&other) noexcept {
^
const
./template.h:304:25: warning: 'constexpr' non-static member function will not be implicitly 'const' in C++14; add 'const' to avoid a change in behavior [-Wconstexpr-not-const]
constexpr const char *copystr(InputIt first, InputIt last) {
^
const
./template.h:230:22: error: constexpr constructor never produces a constant expression [-Winvalid-constexpr]
constexpr explicit ImmutableString(const char *s)
^
./template.h:231:13: note: non-constexpr function 'length' cannot be used in a constant expression
: len(traits_type::length(s)), base(copystr(s, s + len)) {}
^
/Library/Developer/CommandLineTools/usr/bin/../include/c++/v1/__string:217:5: note: declared here
length(const char_type* __s) _NOEXCEPT {return __builtin_strlen(__s);}
^
./template.h:175:19: error: no member named 'make_unique' in namespace 'std'
auto res = std::make_unique<char[]>(last - first + 1);
~~~~~^
./template.h:175:35: error: expected '(' for function-style cast or type construction
auto res = std::make_unique<char[]>(last - first + 1);
~~~~^
In file included from http2.cc:25:
In file included from ./http2.h:40:
In file included from ./util.h:57:
./template.h:240:18: error: no member named 'exchange' in namespace 'std'
: len{std::exchange(other.len, 0)}, base{std::exchange(other.base, "")} {}
~~~~~^
In file included from nghttp.cc:25:
In file included from ./nghttp.h:46:
/opt/local/include/ev.h:548:18: warning: mangled name of 'ev_set_allocator' will change in C++17 due to non-throwing exception specification in function signature [-Wc++17-compat-mangling]
EV_API_DECL void ev_set_allocator (void *(*cb)(void *ptr, long size) EV_NOEXCEPT) EV_NOEXCEPT;
^
./template.h:241:3: error: /opt/local/include/ev.h:destructor cannot be marked constexpr554:18: warning: mangled name of 'ev_set_syserr_cb' will change in C++17 due to non-throwing exception specification in function signature [-Wc++17-compat-mangling]
EV_API_DECL void ev_set_syserr_cb (void (*cb)(const char *msg) EV_NOEXCEPT) EV_NOEXCEPT;
^
constexpr ~ImmutableString() {
^
./template.h:247:30: warning: 'constexpr' non-static member function will not be implicitly 'const' in C++14; add 'const' to avoid a change in behavior [-Wconstexpr-not-const]
constexpr ImmutableString &operator=(const ImmutableString &other) {
^
const
/opt/local/include/ev.h:675:18: warning: mangled name of 'ev_set_loop_release_cb' will change in C++17 due to non-throwing exception specification in function signature [-Wc++17-compat-mangling]
EV_API_DECL void ev_set_loop_release_cb (EV_P_ void (*release)(EV_P) EV_NOEXCEPT, void (*acquire)(EV_P) EV_NOEXCEPT) EV_NOEXCEPT;
^
./template.h:258:30: warning: 'constexpr' non-static member function will not be implicitly 'const' in C++14; add 'const' to avoid a change in behavior [-Wconstexpr-not-const]
constexpr ImmutableString &operator=(ImmutableString &&other) noexcept {
^
const
./template.h:304:25: warning: 'constexpr' non-static member function will not be implicitly 'const' in C++14; add 'const' to avoid a change in behavior [-Wconstexpr-not-const]
constexpr const char *copystr(InputIt first, InputIt last) {
^
const
./template.h:230:22: error: constexpr constructor never produces a constant expression [-Winvalid-constexpr]
constexpr explicit ImmutableString(const char *s)
^
./template.h:231:13: note: non-constexpr function 'length' cannot be used in a constant expression
: len(traits_type::length(s)), base(copystr(s, s + len)) {}
^
/Library/Developer/CommandLineTools/usr/bin/../include/c++/v1/__string:217:5: note: declared here
length(const char_type* __s) _NOEXCEPT {return __builtin_strlen(__s);}
^
./template.h:240:53: error: no member named 'exchange' in namespace 'std'
: len{std::exchange(other.len, 0)}, base{std::exchange(other.base, "")} {}
~~~~~^
./template.h:239:13: error: constexpr constructor must initialize all members
constexpr ImmutableString(ImmutableString &&other) noexcept
^
./template.h:313:13: note: member not initialized by constructor
size_type len;
^
./template.h:314:15: note: member not initialized by constructor
const char *base;
^
./template.h:249:14: error: binding value of type 'const nghttp2::ImmutableString' to reference to type 'nghttp2::ImmutableString' drops 'const' qualifier
return *this;
^~~~~
./template.h:254:9: error: cannot assign to non-static data member within const member function 'operator='
len = other.len;
~~~ ^
./template.h:247:30: note: member function 'nghttp2::ImmutableString::operator=' is declared const here
constexpr ImmutableString &operator=(const ImmutableString &other) {
~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
./template.h:255:10: error: cannot assign to non-static data member within const member function 'operator='
base = copystr(std::begin(other), std::end(other));
~~~~ ^
./template.h:247:30: note: member function 'nghttp2::ImmutableString::operator=' is declared const here
constexpr ImmutableString &operator=(const ImmutableString &other) {
~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
./template.h:256:12: error: binding value of type 'const nghttp2::ImmutableString' to reference to type 'nghttp2::ImmutableString' drops 'const' qualifier
return *this;
^~~~~
./template.h:248:5: warning: use of this statement in a constexpr function is a C++14 extension [-Wc++14-extensions]
if (this == &other) {
^
fatal error: too many errors emitted, stopping now [-ferror-limit=]
In file included from util.cc:25:
In file included from ./util.h:57:
./template.h:240:18: error: no member named 'exchange' in namespace 'std'
: len{std::exchange(other.len, 0)}, base{std::exchange(other.base, "")} {}
~~~~~^
./template.h:240:53: error: no member named 'exchange' in namespace 'std'
: len{std::exchange(other.len, 0)}, base{std::exchange(other.base, "")} {}
~~~~~^
./template.h:239:13: error: constexpr constructor must initialize all members
constexpr ImmutableString(ImmutableString &&other) noexcept
^
./template.h:313:13: note: member not initialized by constructor
size_type len;
^
./template.h:314:15: note: member not initialized by constructor
const char *base;
^
./template.h:249:14: error: binding value of type 'const nghttp2::ImmutableString' to reference to type 'nghttp2::ImmutableString' drops 'const' qualifier
return *this;
^~~~~
./template.h:254:9: error: cannot assign to non-static data member within const member function 'operator='
len = other.len;
~~~ ^
./template.h:247:30: note: member function 'nghttp2::ImmutableString::operator=' is declared const here
constexpr ImmutableString &operator=(const ImmutableString &other) {
~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
./template.h:255:10: error: cannot assign to non-static data member within const member function 'operator='
base = copystr(std::begin(other), std::end(other));
~~~~ ^
./template.h:247:30: note: member function 'nghttp2::ImmutableString::operator=' is declared const here
constexpr ImmutableString &operator=(const ImmutableString &other) {
~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
./template.h:256:12: error: binding value of type 'const nghttp2::ImmutableString' to reference to type 'nghttp2::ImmutableString' drops 'const' qualifier
return *this;
^~~~~
./template.h:248:5: warning: use of this statement in a constexpr function is a C++14 extension [-Wc++14-extensions]
if (this == &other) {
^
fatal error: too many errors emitted, stopping now [-ferror-limit=]
7 warnings and 20 errors generated.
make[3]: *** [http2.o] Error 1
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