gcc: Improve build reproduciblity

Prevent the gcc embedded checksum from containing a checksum that was
computed with build specific paths. The checksum-options file included
the value of LINKER/LDFLAGS which contains DEBUG_PREFIX_MAP and
STAGING_DIR_TARGET.

(From OE-Core rev: 0ead8cbdfb96c4fcbefd24c6647d0f50599f45b3)

Signed-off-by: Nathan Rossi <nathan@nathanrossi.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 7 insertions, 0 deletions

diff --git a/meta/recipes-devtools/gcc/gcc-cross.inc b/meta/recipes-devtools/gcc/gcc-cross.inc
index 06ba3ccd15..6784d9673f 100644
--- a/meta/recipes-devtools/gcc/gcc-cross.inc
+++ b/meta/recipes-devtools/gcc/gcc-cross.inc
@@ -68,6 +68,13 @@ do_compile () {
         sed -i 's@${STAGING_DIR_TARGET}@/host@g' ${B}/gcc/configargs.h
         sed -i 's@${STAGING_DIR_HOST}@/host@g' ${B}/gcc/configargs.h
 
+        # Prevent sysroot/workdir paths from being used in checksum-options.
+        # checksum-options is used to generate a checksum which is embedded into
+        # the output binary.
+        oe_runmake TARGET-gcc=checksum-options all-gcc
+        sed -i 's@${DEBUG_PREFIX_MAP}@@g' ${B}/gcc/checksum-options
+        sed -i 's@${STAGING_DIR_HOST}@/host@g' ${B}/gcc/checksum-options
+
         oe_runmake all-host configure-target-libgcc
         (cd ${B}/${TARGET_SYS}/libgcc; oe_runmake enable-execute-stack.c unwind.h md-unwind-support.h sfp-machine.h gthr-default.h)
         # now generate script to drive testing