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Why do I get errors like “undefined reference to `_gfortran_pow_r8_i4 when linking code compiled with gcc/gfortran v 4.3?

April 26, 2017code compiled errors gcc gfortran linking Reference undefined

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Why do I get errors like “undefined reference to `_gfortran_pow_r8_i4 when linking code compiled with gcc/gfortran v 4.3?

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A. GCC 4.3.2 requires libraries built with GCC 4.3 or later. In particular, users should load the modules xt-mpt/3.2.0 & xt-libsci/10.3.4 before linking. Also note that Fortran modules are incompatible with previous versions of GCC.