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@@ -137,12 +137,12 @@ Compiling against the newer (C++11 and later) ABI can be achieved by adding
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extension to differently mangle symbol names in order to link against the new ABI versions.
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(Some systems may be configured to build with the new ABI by default, and in that case you
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-build against the old ABI using D_GLIBCXX_USE_CXX11_ABI=1).
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+build against the old ABI using -D_GLIBCXX_USE_CXX11_ABI=0).
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This is problematic for several reasons. First, it prevents linking against the new ABI with
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other compilers that do not understand the language extension (LLVM i.e. clang++ does so
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in recent versions, so this is perhaps no longer much of a problem in practice). Secondly,
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-some aspects of library behavior are ABI-dependent but cannot be changed using the ABI
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+some aspects of library behaviour are ABI-dependent but cannot be changed using the ABI
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macro; in particular, exceptions thrown as a result of failed I/O operations are, in GCC
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versions 5.x and 6.x, always "old ABI" exceptions which cannot be caught by code compiled
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against the new ABI, and in GCC version 7.x they are always "new ABI" exceptions which cannot
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Davin McCall