From b737686b2c5277bfa62705c41e71ad60e1d44ae8 Mon Sep 17 00:00:00 2001
From: Felix Fietkau <nbd@openwrt.org>
Date: Mon, 25 Jan 2016 15:49:31 +0000
Subject: build: use -iremap feature to replace __FILE__ absolute path names in
 packages with ones relative to $(BUILD_DIR)

improves reproducible builds

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

SVN-Revision: 48489
---
 include/package.mk | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'include/package.mk')

diff --git a/include/package.mk b/include/package.mk
index 1dfbd68d33..ca315b59ac 100644
--- a/include/package.mk
+++ b/include/package.mk
@@ -14,6 +14,7 @@ PKG_INSTALL_DIR ?= $(PKG_BUILD_DIR)/ipkg-install
 PKG_MD5SUM ?= unknown
 PKG_BUILD_PARALLEL ?=
 PKG_USE_MIPS16 ?= 1
+PKG_IREMAP ?= 1
 
 ifneq ($(CONFIG_PKG_BUILD_USE_JOBSERVER),)
   MAKE_J:=$(if $(MAKE_JOBSERVER),$(MAKE_JOBSERVER) -j)
@@ -33,6 +34,10 @@ ifdef CONFIG_USE_MIPS16
     TARGET_CFLAGS += -mips16 -minterlink-mips16
   endif
 endif
+ifeq ($(strip $(PKG_IREMAP)),1)
+  IREMAP_CFLAGS = $(call iremap,$(PKG_BUILD_DIR),$(notdir $(PKG_BUILD_DIR)))
+  TARGET_CFLAGS += $(IREMAP_CFLAGS)
+endif
 
 include $(INCLUDE_DIR)/hardening.mk
 include $(INCLUDE_DIR)/prereq.mk
-- 
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