gmp - enable-fat: missing dispatch function for __gmpn_add_nc

[Dan Grayson]

If I configure gmp 4.2.1 with --enable-fat then I can get a link error:

    % cat foo.c
    main () {
    __gmpn_add_n();
    }

    % gcc foo.c -L$HOME/local.Linux/lib -lgmp 
    /home/25/dan/local.Linux/lib/libgmp.so: undefined reference to `__gmpn_add_nc'
    /home/25/dan/local.Linux/lib/libgmp.so: undefined reference to `__gmpn_sub_nc'
    collect2: ld returned 1 exit status

Here is one fix that seems to work, but I don't know whether it's really right.

    diff -ur ../4.2.1-orig/gmp-4.2.1/mpn/generic/addsub_n.c ./gmp-4.2.1/mpn/generic/addsub_n.c
    --- ../4.2.1-orig/gmp-4.2.1/mpn/generic/addsub_n.c	2006-03-14 09:57:54.000000000 -0600
    +++ ./gmp-4.2.1/mpn/generic/addsub_n.c	2006-10-11 20:50:55.000000000 -0500
    @@ -58,13 +58,13 @@
	   for (off = 0; off < n; off += PART_SIZE)
	    {
	      this_n = MIN (n - off, PART_SIZE);
    -#if HAVE_NATIVE_mpn_add_nc || !HAVE_NATIVE_mpn_add_n
    +#if HAVE_NATIVE_mpn_add_nc
	      acyo = mpn_add_nc (r1p + off, s1p + off, s2p + off, this_n, acyo);
     #else
	      acyn = mpn_add_n (r1p + off, s1p + off, s2p + off, this_n);
	      acyo = acyn + mpn_add_1 (r1p + off, r1p + off, this_n, acyo);
     #endif
    -#if HAVE_NATIVE_mpn_sub_nc || !HAVE_NATIVE_mpn_sub_n
    +#if HAVE_NATIVE_mpn_sub_nc
	      scyo = mpn_sub_nc (r2p + off, s1p + off, s2p + off, this_n, scyo);
     #else
	      scyn = mpn_sub_n (r2p + off, s1p + off, s2p + off, this_n);
    @@ -81,13 +81,13 @@
	   for (off = 0; off < n; off += PART_SIZE)
	    {
	      this_n = MIN (n - off, PART_SIZE);
    -#if HAVE_NATIVE_mpn_sub_nc || !HAVE_NATIVE_mpn_sub_n
    +#if HAVE_NATIVE_mpn_sub_nc
	      scyo = mpn_sub_nc (r2p + off, s1p + off, s2p + off, this_n, scyo);
     #else
	      scyn = mpn_sub_n (r2p + off, s1p + off, s2p + off, this_n);
	      scyo = scyn + mpn_sub_1 (r2p + off, r2p + off, this_n, scyo);
     #endif
    -#if HAVE_NATIVE_mpn_add_nc || !HAVE_NATIVE_mpn_add_n
    +#if HAVE_NATIVE_mpn_add_nc
	      acyo = mpn_add_nc (r1p + off, s1p + off, s2p + off, this_n, acyo);
     #else
	      acyn = mpn_add_n (r1p + off, s1p + off, s2p + off, this_n);
    @@ -105,13 +105,13 @@
	   for (off = 0; off < n; off += PART_SIZE)
	    {
	      this_n = MIN (n - off, PART_SIZE);
    -#if HAVE_NATIVE_mpn_add_nc || !HAVE_NATIVE_mpn_add_n
    +#if HAVE_NATIVE_mpn_add_nc
	      acyo = mpn_add_nc (tp, s1p + off, s2p + off, this_n, acyo);
     #else
	      acyn = mpn_add_n (tp, s1p + off, s2p + off, this_n);
	      acyo = acyn + mpn_add_1 (tp, tp, this_n, acyo);
     #endif
    -#if HAVE_NATIVE_mpn_sub_nc || !HAVE_NATIVE_mpn_sub_n
    +#if HAVE_NATIVE_mpn_sub_nc
	      scyo = mpn_sub_nc (r2p + off, s1p + off, s2p + off, this_n, scyo);
     #else
	      scyn = mpn_sub_n (r2p + off, s1p + off, s2p + off, this_n);

Details of system:

    u123% gcc -v
    Using built-in specs.
    Target: i686-pc-linux-gnu
    Configured with: /home/25/dan/local/encap/capybara/share/capybara/packages/gcc/TMP/4.1.0/./gcc-4.1.0/./configure --prefix=/home/25/dan/local.Linux --enable-languages=c++,f95 --with-local-prefix=/home/25/dan/local.Linux/local --enable-shared --enable-threads=posix --with-as=/home/25/dan/local.Linux/bin/as --with-ld=/home/25/dan/local.Linux/bin/ld
    Thread model: posix
    gcc version 4.1.0

    u123% uname -a
    Linux u123.math.uiuc.edu 2.4.22-1.2199.4.legacy.nptl #1 Sun Feb 20 18:21:21 EST 2005 i686 i686 i386 GNU/Linux


    gmp configuration command:

    CC="gcc" CPPFLAGS="-I/home/25/dan/local/include -I/home/25/dan/local.Linux/include" LDFLAGS="-L/home/25/dan/local/lib" ./configure --prefix=/home/25/dan/local.Linux --enable-cxx --enable-fat