gettext: AM_GNU_GETTEXT_NEED

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1 13.5.3 AM_GNU_GETTEXT_NEED in ‘gettext.m4’
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1 
1    The ‘AM_GNU_GETTEXT_NEED’ macro declares a constraint regarding the
1 GNU gettext implementation.  The syntax is
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1      AM_GNU_GETTEXT_NEED([NEEDSYMBOL])
1 
1    If NEEDSYMBOL is ‘need-ngettext’, then GNU gettext implementations
1 (in libc or libintl) without the ‘ngettext()’ function will be ignored.
1 If NEEDSYMBOL is ‘need-formatstring-macros’, then GNU gettext
1 implementations that don’t support the ISO C 99 ‘<inttypes.h>’
1 formatstring macros will be ignored.
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1    The optional second argument of ‘AM_GNU_GETTEXT’ is also taken into
1 account.
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1    The ‘AM_GNU_GETTEXT_NEED’ invocations can occur before or after the
1 ‘AM_GNU_GETTEXT’ invocation; the order doesn’t matter.
1