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2016-06-21 12:54 GMT+08:00 Lei Zhang <zhanglei.april@×××××.com>: |
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> 2016-06-17 20:44 GMT+08:00 Lei Zhang <zhanglei.april@×××××.com>: |
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>> After putting about eight "#define _GNU_SOURCE"s in various *.cpp |
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>> files, it seems to work now :) |
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> |
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> I was wrong; it doesn't work... I still can't figure out a good solution :( |
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> |
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> Take glibc's strtoll_l for example: it's hidden by _GNU_SOURCE in |
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> stdlib.h and used exclusively by libc++'s header <locale>; but |
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> defining _GNU_SOURCE in <locale> could be too late, since stdlib.h |
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> might be included prior to <locale>. |
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> |
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> Though glibc's stdlib.h is only explicitly included in <cstdlib>, |
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> defining _GNU_SOURCE in <cstdlib> doesn't work either. It turns out |
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> strtoll_l (and others) is not directly protected by _GNU_SOURCE, but |
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> by __USE_GNU, which is in turn defined in features.h according to |
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> _GNU_SOURCE. That means "#define _GNU_SOURCE" must appear before the |
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> inclusion of features.h, and it's not very clear where "#undef |
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> _GNU_SOURCE" should be put. |
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> |
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> Any suggestions? |
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|
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The only feasible solution I can think of is to wrap every inclusion of C header |
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