From: Peter Korsgaard Date: Sat, 25 Feb 2017 21:17:01 +0000 (+0100) Subject: synergy: Fix build with gcc 6 X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=021f95a2a43b9d3e765856ab9eb5e8d5af5a3dcd;p=buildroot.git synergy: Fix build with gcc 6 Fixes: http://autobuild.buildroot.net/results/05b/05bbc22dd6cd5564462226e612ab1e95778fe935/ http://autobuild.buildroot.net/results/edf/edfe58749d1b7a1bb2e0184a6824a74b9d38ddb9/ http://autobuild.buildroot.net/results/139/1395eca13ca537bde928ddd68a5bc6e130e82ba3/ http://autobuild.buildroot.net/results/94a/94ad6e8bbbeb926ea834d9d6e3ba87d0398acb86/ Gcc 6.x defaults to C++14, and the iostream operator bool behaviour changed in C++11. In previous versions, a somewhat odd operator void* was used to return the status of the stream as a pointer. Since C++11 a more sensible operator bool is used to return the stream staus. For details, see: http://en.cppreference.com/w/cpp/io/basic_ios/operator_bool The code in CConfigReadContext assumes the pre-C++11 behaviour and provides its own operator void overload to return the status of the embedded iostream. With C++11, iostream no longer provides this overload, breaking the build: CConfig.cpp: In member function 'CConfigReadContext::operator void*() const': CConfig.cpp:1851:9: error: cannot convert 'std::istream {aka std::basic_istream}' to 'void*' in return return m_stream; To fix it, backport part of upstream commit 3d963bfbe7897d0a33ad (possible fix for mavericks) which changes the code to simply provide a getStream() method which returns a reference to the embedded stream and the calling code is changed to use operator bool on the returned stream, making the code compatible with both old and new compilers. This upstream commit is part of the 1.6.0 release, so can be dropped when the version is bumped. Signed-off-by: Peter Korsgaard Signed-off-by: Thomas Petazzoni --- diff --git a/package/synergy/0003-Fix-build-with-gcc-6.patch b/package/synergy/0003-Fix-build-with-gcc-6.patch new file mode 100644 index 0000000000..843078fe63 --- /dev/null +++ b/package/synergy/0003-Fix-build-with-gcc-6.patch @@ -0,0 +1,86 @@ +From b79d478c21ed6af20554ead97da72de845dc3206 Mon Sep 17 00:00:00 2001 +From: Peter Korsgaard +Date: Sat, 25 Feb 2017 21:57:19 +0100 +Subject: [PATCH] Fix build with gcc 6 + +Gcc 6.x defaults to C++14, and the iostream operator bool behaviour changed +in C++11. In previous versions, a somewhat odd operator void* was used to +return the status of the stream as a pointer. Since C++11 a more sensible +operator bool is used to return the stream staus. + +For details, see: + +http://en.cppreference.com/w/cpp/io/basic_ios/operator_bool + +The code in CConfigReadContext assumes the pre-C++11 behaviour and provides +its own operator void overload to return the status of the embedded +iostream. With C++11, iostream no longer provides this overload, breaking +the build: + +CConfig.cpp: In member function 'CConfigReadContext::operator void*() const': +CConfig.cpp:1851:9: error: cannot convert 'std::istream {aka std::basic_istream}' to 'void*' in return + return m_stream; + +To fix it, backport part of upstream commit 3d963bfbe7897d0a33ad (possible +fix for mavericks) which changes the code to simply provide a getStream() +method which returns a reference to the embedded stream and the calling code +is changed to use operator bool on the returned stream, making the code +compatible with both old and new compilers. + +This upstream commit is part of the 1.6.0 release, so can be dropped when +the version is bumped. + +Signed-off-by: Peter Korsgaard +--- + lib/server/CConfig.cpp | 7 +------ + lib/server/CConfig.h | 2 +- + 2 files changed, 2 insertions(+), 7 deletions(-) + +diff --git a/lib/server/CConfig.cpp b/lib/server/CConfig.cpp +index a502fe78..d67dde20 100644 +--- a/lib/server/CConfig.cpp ++++ b/lib/server/CConfig.cpp +@@ -607,7 +607,7 @@ void + CConfig::read(CConfigReadContext& context) + { + CConfig tmp; +- while (context) { ++ while (context.getStream()) { + tmp.readSection(context); + } + *this = tmp; +@@ -1846,11 +1846,6 @@ CConfigReadContext::getLineNumber() const + return m_line; + } + +-CConfigReadContext::operator void*() const +-{ +- return m_stream; +-} +- + bool + CConfigReadContext::operator!() const + { +diff --git a/lib/server/CConfig.h b/lib/server/CConfig.h +index c0d2faa8..0ee453cb 100644 +--- a/lib/server/CConfig.h ++++ b/lib/server/CConfig.h +@@ -480,7 +480,6 @@ public: + bool readLine(CString&); + UInt32 getLineNumber() const; + +- operator void*() const; + bool operator!() const; + + OptionValue parseBoolean(const CString&) const; +@@ -502,6 +501,7 @@ public: + IPlatformScreen::CButtonInfo* + parseMouse(const CString& mouse) const; + KeyModifierMask parseModifier(const CString& modifiers) const; ++ std::istream& getStream() const { return m_stream; }; + + private: + // not implemented +-- +2.11.0 +