crosstool-ng: patches/gcc/4.2.1/270-soft-float.patch@ff2181adbd28

cc/gcc: disable complibs if not selected

Force gcc to not link with some companion libraries when
there are not needed (because selected-out).

There is no option to tell gcc *not* to build the Graphite and/or
LTO stuff. They *will* be built if gcc finds the suitable companion
libraries. If we do not provide them, but the host has them, then
gcc *will* find them, and link with them.

Consider the following:
- host has suitable PPL and CLooG (eg. Debian Squeeze)
- user wants to build gcc>=4.4
- user de-selects GRAPHITE
- gcc will find the hosts PPL and CLooG, and will use them
- the user moves the toolchain to an older host that does
not have them (eg. Debian Lenny)
- the toolchain fails, when it was properly setup not to

So, explicitly tell gcc *not* to use unneeded companion libs.

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>

     1 diff -uNpr gcc-4.2.1_orig/gcc/config/rs6000/darwin-ldouble.c gcc-4.2.1/gcc/config/rs6000/darwin-ldouble.c

     2 --- gcc-4.2.1_orig/gcc/config/rs6000/darwin-ldouble.c	2007-03-05 11:54:00.000000000 -0500

     3 +++ gcc-4.2.1/gcc/config/rs6000/darwin-ldouble.c	2008-01-31 17:51:24.000000000 -0500

     4 @@ -70,6 +70,8 @@ Software Foundation, 51 Franklin Street,

     5     but GCC currently generates poor code when a union is used to turn

     6     a long double into a pair of doubles.  */

     8 +#if defined (_SOFT_FLOAT) && defined (__LONG_DOUBLE_128__)

9 +

    10  long double __gcc_qadd (double, double, double, double);

    11  long double __gcc_qsub (double, double, double, double);

    12  long double __gcc_qmul (double, double, double, double);

    13 @@ -219,8 +221,6 @@ __gcc_qdiv (double a, double b, double c

    14    return z.ldval;

    15  }

    17 -#if defined (_SOFT_FLOAT) && defined (__LONG_DOUBLE_128__)

    18 -

    19  long double __gcc_qneg (double, double);

    20  int __gcc_qeq (double, double, double, double);

    21  int __gcc_qne (double, double, double, double);

author	"Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>
	Sun Sep 12 23:51:25 2010 +0200 (2010-09-12)
changeset 2123	ff2181adbd28
parent 616	6e78f7085707
permissions	-rw-r--r--