What is libg2c.a? And why do I have to link to it?

[Mikael Hedin <mikael.hedin@gmx.net>]

Hi,

I have a autoconf test that fails if i don't give -lg2c as extra link
flags.  Without g2c there are undefined references to e_wsfe, z_abs,
c_sqrt, etc.  Is not g2c an internal gcc thing?

The autoconf lines in question is:

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)

TIA,

Micce

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Mikael Hedin, MSc +46 (0)8 344979 (home) +46 (0)70 5891533 (mobile)
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