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build: Add _FORTIFY_SOURCE=3 support

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Add support for _FORTIFY_SOURCE level 3.

This is supported with glibc and with musl libc.

Link: https://github.com/openwrt/openwrt/pull/20313
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
This commit is contained in:
Hauke Mehrtens
2025-10-05 23:30:17 +02:00
parent 6268692bd2
commit 93f86627c4
3 changed files with 10 additions and 2 deletions
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5
include/hardening.mk
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@@ -51,6 +51,11 @@ ifdef CONFIG_PKG_FORTIFY_SOURCE_2
TARGET_CFLAGS += -D_FORTIFY_SOURCE=2
endif
endif
ifdef CONFIG_PKG_FORTIFY_SOURCE_3
ifeq ($(strip $(PKG_FORTIFY_SOURCE)),1)
TARGET_CFLAGS += -D_FORTIFY_SOURCE=3
endif
endif
ifdef CONFIG_PKG_RELRO_PARTIAL
ifeq ($(strip $(PKG_RELRO)),1)
TARGET_CFLAGS += -Wl,-z,relro