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021f95a2a4
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<char>}' 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 <peter@korsgaard.com> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Buildroot is a simple, efficient and easy-to-use tool to generate embedded Linux systems through cross-compilation. The documentation can be found in docs/manual. You can generate a text document with 'make manual-text' and read output/docs/manual/manual.text. Online documentation can be found at http://buildroot.org/docs.html To build and use the buildroot stuff, do the following: 1) run 'make menuconfig' 2) select the target architecture and the packages you wish to compile 3) run 'make' 4) wait while it compiles 5) find the kernel, bootloader, root filesystem, etc. in output/images You do not need to be root to build or run buildroot. Have fun! Buildroot comes with a basic configuration for a number of boards. Run 'make list-defconfigs' to view the list of provided configurations. Please feed suggestions, bug reports, insults, and bribes back to the buildroot mailing list: buildroot@buildroot.org You can also find us on #buildroot on Freenode IRC. If you would like to contribute patches, please read https://buildroot.org/manual.html#submitting-patches