gcc-4.8: fix compiling GCC when /usr/lib/libstdc++.so is present

libtool is picking up libstdc++.so from /usr/lib when trying to link
libasan due to libstdc++.la containing libdir="/usr/lib". If compiling
for x86 and the host has 64-bit /usr/lib/libstdc++.so, the compilation
fails linking libasan with:
/usr/lib/libstdc++.so: could not read symbols: File in wrong format

To resolve this, patch libtool to look for the library in the path the
.la is contained in rather than use the libdir which usually points to
a host path.

[YOCTO #4879]

Signed-off-by: Jonathan Liu <net147@gmail.com>
Signed-off-by: Saul Wold <sgw@linux.intel.com>

diff --git a/meta/recipes-devtools/gcc/gcc-4.8.inc b/meta/recipes-devtools/gcc/gcc-4.8.inc
index dafa2415ec467b22337c29fd7f7a77bbfbfa7602..42355f2102d5764196cfd6438151919d0c5f62cf 100644 (file)
--- a/meta/recipes-devtools/gcc/gcc-4.8.inc
+++ b/meta/recipes-devtools/gcc/gcc-4.8.inc
@@ -70,6 +70,7 @@ SRC_URI = "${GNU_MIRROR}/gcc/gcc-${PV}/gcc-${PV}.tar.bz2 \
           file://0038-gcc-4.8-build-args.patch \
           file://0039-gcc-4.8-PR57717.patch \
           file://0040-fix-g++-sysroot.patch \
+          file://0041-libtool-avoid-libdir.patch \
          "
 SRC_URI[md5sum] = "3b2386c114cd74185aa3754b58a79304"
 SRC_URI[sha256sum] = "545b44be3ad9f2c4e90e6880f5c9d4f0a8f0e5f67e1ffb0d45da9fa01bb05813"

diff --git a/meta/recipes-devtools/gcc/gcc-4.8/0041-libtool-avoid-libdir.patch b/meta/recipes-devtools/gcc/gcc-4.8/0041-libtool-avoid-libdir.patch
new file mode 100644 (file)
index 0000000..2dd9610
--- /dev/null
+++ b/meta/recipes-devtools/gcc/gcc-4.8/0041-libtool-avoid-libdir.patch
@@ -0,0 +1,19 @@
+Avoid using libdir from .la which usually points to a host path
+
+Upstream-Status: Inappropriate [embedded specific]
+Signed-off-by: Jonathan Liu <net147@gmail.com>
+
+diff --git a/ltmain.sh b/ltmain.sh
+index a03433f..1902a90 100644
+--- a/ltmain.sh
++++ b/ltmain.sh
+@@ -5628,6 +5628,9 @@ func_mode_link ()
+           absdir="$abs_ladir"
+           libdir="$abs_ladir"
+         else
++          # Instead of using libdir from .la which usually points to a host path,
++          # use the path the .la is contained in.
++          libdir="$abs_ladir"
+           dir="$libdir"
+           absdir="$libdir"
+         fi