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From e4e456405177add4df5e21528caa3d873847056a Mon Sep 17 00:00:00 2001
From: Marco Felsch <m.felsch@pengutronix.de>
Date: Thu, 24 Nov 2022 11:02:05 +0100
Subject: [PATCH 2/4] build(makefile): add helper to detect linker options
This is a small helper to check for possible linker options. If the
linker supports the requested option it is returned and if not nothing
will be returned, e.g.:
TF_LDFLAGS += $(call ld_option, --no-warn-rwx-segments)
can be called unconditional.
Signed-off-by: Marco Felsch <m.felsch@pengutronix.de>
Change-Id: I236800852ece49948ff53a0b91fddba53c8f0f95
---
make_helpers/build_macros.mk | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/make_helpers/build_macros.mk b/make_helpers/build_macros.mk
index a58caf565163..06caeea19787 100644
--- a/make_helpers/build_macros.mk
+++ b/make_helpers/build_macros.mk
@@ -86,6 +86,12 @@ define assert_numerics
$(foreach num,$1,$(eval $(call assert_numeric,$(num))))
endef
+# Convenience function to check for a given linker option. An call to
+# $(call ld_option, --no-XYZ) will return --no-XYZ if supported by the linker
+define ld_option
+ $(shell if $(LD) $(1) -v >/dev/null 2>&1; then echo $(1); fi )
+endef
+
# CREATE_SEQ is a recursive function to create sequence of numbers from 1 to
# $(2) and assign the sequence to $(1)
define CREATE_SEQ
--
2.30.2
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