[Minios-devel] [UNIKRAFT PATCH 1/2] build: limit gcc version to 6.1 if LTO is enabled

[Yuri Volchkov <yuri.volchkov@xxxxxxxxx>]

Unikraft is using incremental linking, which is not supported by lto
in gcc earlier then 6.1.

Signed-off-by: Yuri Volchkov <yuri.volchkov@xxxxxxxxx>
---
 Makefile | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/Makefile b/Makefile
index efc94a1..abb4e03 100644
--- a/Makefile
+++ b/Makefile
@@ -474,6 +474,12 @@ ifneq ($(CONFIG_HAVE_BOOTENTRY),y)
 $(error You did not select a library that handles bootstrapping! (e.g., 
ukboot))
 endif
 
+ifeq ($(CONFIG_OPTIMIZE_LTO), y)
+ifneq ($(call gcc_version_ge,6,1),y)
+$(error Your gcc version does not support incremental link time optimisation)
+endif
+endif
+
 # Generate build rules
 include $(CONFIG_UK_BASE)/support/build/Makefile.build
 
-- 
2.19.2


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