toolchain/toolchain-wrapper: reproducible builds: omit absolute paths…

… from debug symbols In GCC6 the compiler was made smarter to omit the flag -fdebug-prefix-map from the DWARF DW_AT_producer section[1]. That flag contains the absolute path '$(BASE_DIR)' which breaks reproducibility. Prior to GCC6 however, the only way to omit the flag is to use -gno-record-gcc-switches which omits all flags. [1] https://gcc.gnu.org/git/?p=gcc.git;a=commit;h=266cc0c181549c2fb6b50f8f26213cdc89101026 Signed-off-by: Brandon Maier <[email protected]> [Arnout: invert condition to ifeq (,) instead of ifneq (,y)] Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <[email protected]>
blazium-engine · Jan 8, 2022 · 7ec9b3a · 7ec9b3a
1 parent 409e30a
commit 7ec9b3a
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/toolchain/toolchain-wrapper.mk b/toolchain/toolchain-wrapper.mk
@@ -32,6 +32,9 @@ endif
 ifeq ($(BR2_TOOLCHAIN_GCC_AT_LEAST_7),)
 TOOLCHAIN_WRAPPER_OPTS += -DBR_NEED_SOURCE_DATE_EPOCH
 endif
+ifeq ($(BR2_TOOLCHAIN_GCC_AT_LEAST_6),)
+TOOLCHAIN_WRAPPER_OPTS += -gno-record-gcc-switches
+endif
 endif
 
 # Disable -ftree-loop-distribute-patterns on microblaze to