[Buildroot] [git commit] package/websocketpp: fix build with C++20
Thomas Petazzoni
thomas.petazzoni at bootlin.com
Sat Nov 4 13:41:19 UTC 2023
commit: https://git.buildroot.net/buildroot/commit/?id=9ac1a76fcf255a9b8d2ce15514595e02275efc8e
branch: https://git.buildroot.net/buildroot/commit/?id=refs/heads/master
websocketpp had some ill-formed usage of template parameters which was
finally removed in C++20. Hence build fails when building with C++20
support enabled.
The patch is already in the develop branch but no new release was
done.
There are no autobuilder failures because websocketpp is a header-only
library, and there are no packages in Buildroot that depned on
websocketpp.
A build issue was encountered when bumping an internal project to
C++20. This issue triggered quite some bug reports in the project [0]
and there are backports to other package managers like vcpkg [1] and
conan [2].
[0] https://github.com/zaphoyd/websocketpp/pull/1060
[1] https://github.com/microsoft/vcpkg/pull/23669
[2] https://github.com/conan-io/conan-center-index/pull/15295
Signed-off-by: Michael Nosthoff <buildroot at heine.tech>
[Thomas: extend commit log with details provided by Michael.]
Signed-off-by: Thomas Petazzoni <thomas.petazzoni at bootlin.com>
---
package/websocketpp/0001-fix_cpp20_build.patch | 108 +++++++++++++++++++++++++
1 file changed, 108 insertions(+)
diff --git a/package/websocketpp/0001-fix_cpp20_build.patch b/package/websocketpp/0001-fix_cpp20_build.patch
new file mode 100644
index 0000000000..77b2292051
--- /dev/null
+++ b/package/websocketpp/0001-fix_cpp20_build.patch
@@ -0,0 +1,108 @@
+From 3197a520eb4c1e4754860441918a5930160373eb Mon Sep 17 00:00:00 2001
+From: Peter Thorson <git at zaphoyd.com>
+Date: Tue, 29 Jun 2021 09:13:12 -0500
+Subject: [PATCH] [core] Remove the use of simple template ids as they have
+ been removed in c++20.
+ https://timsong-cpp.github.io/cppwp/n4861/diff.cpp17.class#2 references #991
+
+Signed-off-by: Michael Nosthoff <buildroot at heine.tech>
+Upstream: https://github.com/zaphoyd/websocketpp/commit/3197a520eb4c1e4754860441918a5930160373eb
+---
+ websocketpp/endpoint.hpp | 2 +-
+ websocketpp/logger/basic.hpp | 14 +++++++-------
+ websocketpp/roles/server_endpoint.hpp | 6 +++---
+ 3 files changed, 11 insertions(+), 11 deletions(-)
+
+diff --git a/websocketpp/endpoint.hpp b/websocketpp/endpoint.hpp
+index 825eaa46d..10f525689 100644
+--- a/websocketpp/endpoint.hpp
++++ b/websocketpp/endpoint.hpp
+@@ -111,7 +111,7 @@ class endpoint : public config::transport_type, public config::endpoint_base {
+
+
+ /// Destructor
+- ~endpoint<connection,config>() {}
++ ~endpoint() {}
+
+ #ifdef _WEBSOCKETPP_DEFAULT_DELETE_FUNCTIONS_
+ // no copy constructor because endpoints are not copyable
+diff --git a/websocketpp/logger/basic.hpp b/websocketpp/logger/basic.hpp
+index 84514130e..4c9d83649 100644
+--- a/websocketpp/logger/basic.hpp
++++ b/websocketpp/logger/basic.hpp
+@@ -58,33 +58,33 @@ namespace log {
+ template <typename concurrency, typename names>
+ class basic {
+ public:
+- basic<concurrency,names>(channel_type_hint::value h =
++ basic(channel_type_hint::value h =
+ channel_type_hint::access)
+ : m_static_channels(0xffffffff)
+ , m_dynamic_channels(0)
+ , m_out(h == channel_type_hint::error ? &std::cerr : &std::cout) {}
+
+- basic<concurrency,names>(std::ostream * out)
++ basic(std::ostream * out)
+ : m_static_channels(0xffffffff)
+ , m_dynamic_channels(0)
+ , m_out(out) {}
+
+- basic<concurrency,names>(level c, channel_type_hint::value h =
++ basic(level c, channel_type_hint::value h =
+ channel_type_hint::access)
+ : m_static_channels(c)
+ , m_dynamic_channels(0)
+ , m_out(h == channel_type_hint::error ? &std::cerr : &std::cout) {}
+
+- basic<concurrency,names>(level c, std::ostream * out)
++ basic(level c, std::ostream * out)
+ : m_static_channels(c)
+ , m_dynamic_channels(0)
+ , m_out(out) {}
+
+ /// Destructor
+- ~basic<concurrency,names>() {}
++ ~basic() {}
+
+ /// Copy constructor
+- basic<concurrency,names>(basic<concurrency,names> const & other)
++ basic(basic<concurrency,names> const & other)
+ : m_static_channels(other.m_static_channels)
+ , m_dynamic_channels(other.m_dynamic_channels)
+ , m_out(other.m_out)
+@@ -97,7 +97,7 @@ class basic {
+
+ #ifdef _WEBSOCKETPP_MOVE_SEMANTICS_
+ /// Move constructor
+- basic<concurrency,names>(basic<concurrency,names> && other)
++ basic(basic<concurrency,names> && other)
+ : m_static_channels(other.m_static_channels)
+ , m_dynamic_channels(other.m_dynamic_channels)
+ , m_out(other.m_out)
+diff --git a/websocketpp/roles/server_endpoint.hpp b/websocketpp/roles/server_endpoint.hpp
+index 4a5865eff..04fee18f9 100644
+--- a/websocketpp/roles/server_endpoint.hpp
++++ b/websocketpp/roles/server_endpoint.hpp
+@@ -75,11 +75,11 @@ class server : public endpoint<connection<config>,config> {
+ }
+
+ /// Destructor
+- ~server<config>() {}
++ ~server() {}
+
+ #ifdef _WEBSOCKETPP_DEFAULT_DELETE_FUNCTIONS_
+ // no copy constructor because endpoints are not copyable
+- server<config>(server<config> &) = delete;
++ server(server<config> &) = delete;
+
+ // no copy assignment operator because endpoints are not copyable
+ server<config> & operator=(server<config> const &) = delete;
+@@ -87,7 +87,7 @@ class server : public endpoint<connection<config>,config> {
+
+ #ifdef _WEBSOCKETPP_MOVE_SEMANTICS_
+ /// Move constructor
+- server<config>(server<config> && o) : endpoint<connection<config>,config>(std::move(o)) {}
++ server(server<config> && o) : endpoint<connection<config>,config>(std::move(o)) {}
+
+ #ifdef _WEBSOCKETPP_DEFAULT_DELETE_FUNCTIONS_
+ // no move assignment operator because of const member variables
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