```{index} single: _gmp_build_version (Math::GMP) ``` ```{index} single: Math::GMP::_gmp_build_version ``` # _gmp_build_version Return the version of `libgmp` this module is built on, as a v-string. ```perl printf "built on libgmp %vd\n", Math::GMP::_gmp_build_version(); # 6.3.0 ``` Upstream reports the GMP headers it was compiled against. libgmp is bound here when the module loads, not at compile time, so the library it is built on is the one loaded: this is `_gmp_lib_version`'s value.