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https://kernel.googlesource.com/pub/scm/network/tftp/tftp-hpa
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fefaa2cc5c
Use my modular m4 library used for other things as well; update autoconf macros to 2.71 standard. Signed-off-by: H. Peter Anvin <hpa@zytor.com>
20 lines
936 B
Text
20 lines
936 B
Text
dnl --------------------------------------------------------------------------
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dnl PA_LANG_SEEN_LIST(subset)
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dnl
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dnl List of the language lang has been used in the configuration
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dnl script so far, possibly subset by [subset].
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dnl
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dnl This relies on overriding _AC_LANG_SET(from, to),
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dnl the internal implementation of _AC_LANG.
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dnl --------------------------------------------------------------------------
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m4_ifndef([_PA_LANG_SET],
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[m4_rename([_AC_LANG_SET], [_PA_LANG_SET])dnl
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m4_defun([_AC_LANG_SET], [m4_set_add([_PA_LANG_SEEN_SET],[$2])dnl
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_PA_LANG_SET($@)])])
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AC_DEFUN([PA_LANG_SEEN_LIST],
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[m4_set_delete([_pa_lang_seen_subset])dnl
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m4_pushdef([_pa_lang_seen_subset_list],m4_ifnblank([$1],[$1],m4_dquote(m4_set_list([_PA_LANG_SEEN_SET]))))dnl
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m4_set_add_all([_pa_lang_seen_subset],_pa_lang_seen_subset_list)dnl
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m4_cdr(m4_set_intersection([_pa_lang_seen_subset],[_PA_LANG_SEEN_SET]))dnl
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m4_popdef([_pa_lang_seen_subset_list])])
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