libtool: Fix lto option passing for reproducible builds

If lto is enabled, we need the prefix-map variables to be passed to the linker.
Add these to the list of options libtool passes through.

(From OE-Core rev: 3dcc84e37ce7e94e746304ee2a4437251af0ae41)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
(cherry picked from commit 2c26d2c00b47df856fb2d9c35486b135094d46ac)
Signed-off-by: Steve Sakoman <steve@sakoman.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

2 files changed, 23 insertions, 0 deletions

diff --git a/meta/recipes-devtools/libtool/libtool-2.4.6.inc b/meta/recipes-devtools/libtool/libtool-2.4.6.inc
index e9225e140c..1bac81331d 100644
--- a/meta/recipes-devtools/libtool/libtool-2.4.6.inc
+++ b/meta/recipes-devtools/libtool/libtool-2.4.6.inc
@@ -23,6 +23,7 @@ SRC_URI = "${GNU_MIRROR}/libtool/libtool-${PV}.tar.gz \
            file://0001-libtool-Check-for-static-libs-for-internal-compiler-.patch \
            file://0001-Makefile.am-make-sure-autoheader-run-before-autoconf.patch \
            file://0001-Makefile.am-make-sure-autoheader-run-before-automake.patch \
+           file://lto-prefix.patch \
           "
 
 SRC_URI[md5sum] = "addf44b646ddb4e3919805aa88fa7c5e"
diff --git a/meta/recipes-devtools/libtool/libtool/lto-prefix.patch b/meta/recipes-devtools/libtool/libtool/lto-prefix.patch
new file mode 100644
index 0000000000..2bd010b8e4
--- /dev/null
+++ b/meta/recipes-devtools/libtool/libtool/lto-prefix.patch
@@ -0,0 +1,22 @@
+If lto is enabled, we need the prefix-map variables to be passed to the linker.
+Add these to the list of options libtool passes through.
+
+Upstream-Status: Pending
+Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
+
+Index: libtool-2.4.6/build-aux/ltmain.in
+===================================================================
+--- libtool-2.4.6.orig/build-aux/ltmain.in
++++ libtool-2.4.6/build-aux/ltmain.in
+@@ -5424,9 +5424,10 @@ func_mode_link ()
+       # --sysroot=*          for sysroot support
+       # -O*, -g*, -flto*, -fwhopr*, -fuse-linker-plugin GCC link-time optimization
+       # -stdlib=*            select c++ std lib with clang
++      # -f*-prefix-map*      needed for lto linking
+       -64|-mips[0-9]|-r[0-9][0-9]*|-xarch=*|-xtarget=*|+DA*|+DD*|-q*|-m*| \
+       -t[45]*|-txscale*|-p|-pg|--coverage|-fprofile-*|-F*|@*|-tp=*|--sysroot=*| \
+-      -O*|-g*|-flto*|-fwhopr*|-fuse-linker-plugin|-fstack-protector*|-stdlib=*)
++      -O*|-g*|-flto*|-fwhopr*|-fuse-linker-plugin|-fstack-protector*|-stdlib=*|-f*-prefix-map*)
+         func_quote_for_eval "$arg"
+        arg=$func_quote_for_eval_result
+         func_append compile_command " $arg"