Akim Demaille 9307c173c7 build: reject C++ compilers that don't support std::vector::data ...

GCC 4.2 on macOS claims to support C++98, but does not feature it.

input.cc: In member function 'void state_stack::yycompressStack()':
input.cc:1774: error: 'class std::vector<glr_stack_item, std::allocator<glr_stack_item> >' has no member named 'data'

Reported by Christopher Nielsen <mascguy@github.com>.
<https://trac.macports.org/raw-attachment/ticket/59927/bison-test-results-20210811-95b72.log.xz>.

* m4/bison-cxx-std.m4 (_BISON_CXXSTD_98_snippet): Check for it.
* m4/cxx.m4 (BISON_TEST_FOR_WORKING_CXX_COMPILER): Ditto.

2021-08-12 10:13:26 +02:00

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