Mikael> I have a autoconf test that fails if i don't give -lg2c as Mikael> extra link flags. Without g2c there are undefined references Mikael> to e_wsfe, z_abs, c_sqrt, etc. Is not g2c an internal gcc Mikael> thing?
dnl this fails for lapack AC_CHECK_LIB(m, pow) AC_CHECK_LIB(blas,ddot_) AC_CHECK_LIB(lapack,sspsv_) dnl this succeeds for lapack AC_CHECK_LIB(m, pow) AC_CHECK_LIB(blas,ddot_) AC_CHECK_LIB(lapack,sspsv_,,,-lg2c) The blas and lapack libraries are originally written in Fortran, I believe. Thus gcc needs the Fortran compatibility library g2c when linking them. (The g in the name stands for g77, not very obvious unfortunately) -- Ian Zimmerman, Oakland, California, U.S.A. GPG: 433BA087 9C0F 194F 203A 63F7 B1B8 6E5A 8CA3 27DB 433B A087 EngSoc adopts market economy: cheap is wasteful, efficient is expensive.
