1# This file is used when building the Configure script from the metaconfig 2# units. Ordinarily, if any *.c or *.h or *.sh file mentions a symbol that can 3# be provided by a metaconfig unit, the generated Configure will include the 4# relevant probe. But in some cases, that's inappropriate: we have symbols that 5# we no longer need to probe for, but must define in perl.h for backwards 6# compatibilty with XS modules. Also, our C files contain tokens like "index" 7# that are used as the names of Perl builtins, but would be treated by 8# metaconfig as implicit requests for a particular unit that we don't need. 9# 10# Previously, we've used customised "stub" versions of metaconfig units to 11# handle this situation, but that doesn't scale (and, in particular, requires 12# us to maintain those customised units for as long as the relevant symbols are 13# defined by the units in the upstream dist package). 14# 15# A better approach is to list those symbols here (and invoke metaconfig with 16# the "-X .metaconf-exclusions.txt" option when generating Configure); that 17# will prevent the relevant units from being used. 18# 19# See also metaconfig.h, which works in the other direction — it forces units 20# to be included, even before specific code using the relevant symbols has been 21# written. 22 23I_LIMITS 24I_STDARG 25index 26rindex 27const 28