The Debian packaging of intelrdfpmath provides all variants of the
library, for static linking only, using the following naming
convention:

libbidgcc000b.a
      ^  ^^^^
      |  |||\- b suffix for UNCHANGED_BINARY_FLAGS=1
      |  ||\-- GLOBAL_FLAGS
      |  |\--- GLOBAL_RND
      |  \---- CALL_BY_REF
      \------- gcc (only variant in Debian)

For details of these settings, see the upstream README file, section 4
(Library build options). Note that CALL_BY_REF is also called
DECIMAL_CALL_BY_REFERENCE, GLOBAL_RND is also called
DECIMAL_GLOBAL_ROUNDING, GLOBAL_FLAGS is also called
DECIMAL_GLOBAL_EXCEPTION_FLAGS, and there are really four build
options, not three.

In most cases, to determine which variant is appropriate, you'll need
to check how the library is built in the project where you want to use
it. Look for the flags mentioned above, and choose the variant that
matches them.

 -- Stephen Kitt <skitt@debian.org>, Wed, 25 Feb 2026 13:29:45 +0100