[gnuastro-devel] [bug #56300] Configure script finds gsl_interp_steffen but building fails

[Mohammad Akhlaghi]

URL:
  <https://savannah.gnu.org/bugs/?56300>

                 Summary: Configure script finds gsl_interp_steffen but
building fails
                 Project: GNU Astronomy Utilities
            Submitted by: makhlaghi
            Submitted on: Fri 10 May 2019 03:25:44 PM BST
                Category: Installation
                Severity: 3 - Normal
              Item Group: Crash
                  Status: Postponed
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any

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Details:

When there are multiple GSL installations on an system, and one of them
doesn't support the `gsl_interp_steffen' function, it can happen that the
configure script finds the header with this function, but the `make' script
fails because it can't link with it.

Currently `configure.ac' uses `AC_CHECK_DECLS' to find this symbol in the
headers. So a possible fix may be to also use the standard `AC_CHECK_LIB' and
if that fails inform the user at configure time and propose solutions.

If we can somehow ask configure to find the location of the header, we can
also modify the absolute address and add it to LDFLAGS, so it links with the
proper library also.




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