Add binutils patch.

doc/manual/installing.rst

@@ -81,6 +81,11 @@ and the ARTIQ kernels.
 
         $ mkdir ~/artiq-dev
 
+* Clone ARTIQ repository: ::
+
+        $ cd ~/artiq-dev
+        $ git clone --recursive https://github.com/m-labs/artiq
+
 * Install OpenRISC binutils (or1k-linux-...): ::
 
         $ cd ~/artiq-dev
@@ -88,8 +93,11 @@ and the ARTIQ kernels.
         $ tar xvf binutils-2.25.1.tar.bz2
         $ rm binutils-2.25.1.tar.bz2
 
-        $ mkdir binutils-2.25.1/build
+        $ cd binutils-2.25.1
-        $ cd binutils-2.25.1/build
+        $ patch -p1 <~/artiq-dev/misc/binutils-2.25.1-or1k-R_PCREL-pcrel_offset.patch
+
+        $ mkdir build
+        $ cd build
         $ ../configure --target=or1k-linux --prefix=/usr/local
         $ make -j4
         $ sudo make install

misc/binutils-2.25.1-or1k-R_PCREL-pcrel_offset.patch

@@ -0,0 +1,29 @@
+--- a/bfd/elf32-or1k.c        2015-08-02 15:45:34.275922535 +0300
++++ b/bfd/elf32-or1k.c        2015-08-02 15:45:36.635931622 +0300
+@@ -199,7 +199,7 @@
+          FALSE,                 /* partial_inplace */
+          0,                     /* src_mask */
+          0xffffffff,            /* dst_mask */
+-         FALSE),                /* pcrel_offset */
++         TRUE),                 /* pcrel_offset */
+
+   HOWTO (R_OR1K_16_PCREL,
+          0,                     /* rightshift */
+@@ -213,7 +213,7 @@
+          FALSE,                 /* partial_inplace */
+          0,                     /* src_mask */
+          0xffff,                /* dst_mask */
+-         FALSE),                /* pcrel_offset */
++         TRUE),                 /* pcrel_offset */
+
+   HOWTO (R_OR1K_8_PCREL,
+          0,                     /* rightshift */
+@@ -227,7 +227,7 @@
+          FALSE,                 /* partial_inplace */
+          0,                     /* src_mask */
+          0xff,                  /* dst_mask */
+-         FALSE),                /* pcrel_offset */
++         TRUE),                 /* pcrel_offset */
+
+    HOWTO (R_OR1K_GOTPC_HI16,    /* Type.  */
+          16,                    /* Rightshift.  */