Posted here: http://gcc.gnu.org/ml/gcc/2006-02/msg00150.html
However, I have noticed this recenly as well. This is considered a bug, as
--enable-languages should actually work.
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Summary: --enable-languages=c,c++,fortran needs ada
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: bootstrap
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: bkoz at gcc dot gnu dot org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26259
