Re: [PPL-devel] User-visible changes to lib-link.m4 and lib-prefix.m4

Hi Roberto,

However, the problem we observe is not in the location of the library.

The problem should go away if, on Linux/x86_64 systems, you use --prefix=PREFIX --libdir=PREFIX/lib64 when installing the gmp library or, as a simple measure afterwards, copy or symlink lib to lib64.

The problem is that, passing from the version distributed with Gettext 0.14.6 to the version distributed with Gettext 0.15, the right -Idir flag is not added to CPPFLAGS.

The AC_LIB_LINKFLAGS macro does not augment CPPFLAGS if it does not find the library. Augmenting CPPFLAGS without setting the LIBGMP, LIBGMPXX variables accordingly would only cause trouble.

 AC_DEFUN([AC_CHECK_GMP],
 [
 dnl Since libgmp and libgmpxx are usually installed in the same location,
 dnl let the prefixes default from each other.
 if test -n "$with_libgmpxx_prefix" && test -z "$with_libgmp_prefix"; then
   with_libgmp_prefix="$with_libgmpxx_prefix"
 else
   if test -n "$with_libgmp_prefix" && test -z "$with_libgmpxx_prefix"; then
     with_libgmpxx_prefix="$with_libgmp_prefix"
   fi
 fi

 dnl Check how to link with libgmp.
 AC_LIB_LINKFLAGS([gmp])

 dnl Check how to link with libgmpxx.
 AC_LIB_LINKFLAGS([gmpxx], [gmp])

This all OK.

Bruno