[UNIKRAFT PATCH] build: Support gcc-10 compilation on Unikraft

[Sharan Santhanam <sharan.santhanam@xxxxxxxxx>]

When compiling Unikraft with gcc-10, the compiler replace the memset
function with a recursive builtin memset call, which result in a
infinite recursive call to the memset causing exhaustion of the stack
memory eventually leading to crash. To fix this the gcc provides
compiler flags -ffreestanding and -fhosted.

Signed-off-by: Sharan Santhanam <sharan.santhanam@xxxxxxxxx>
---
 Makefile.uk | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Makefile.uk b/Makefile.uk
index 4f1c764..e2d75a6 100644
--- a/Makefile.uk
+++ b/Makefile.uk
@@ -56,3 +56,6 @@ M4FLAGS      += -DUK_VERSION=$(UK_VERSION).$(UK_SUBVERSION)
 COMPFLAGS-$(call gcc_version_ge,6,1)   += -no-pie
 LIBLDFLAGS-$(call gcc_version_ge,6,1)  += -no-pie
 LDFLAGS-$(call gcc_version_ge,6,1)     += -no-pie
+ifeq ($(call gcc_version_ge,10,0),y)
+COMPFLAGS-y += -fhosted -ffreestanding -fno-tree-loop-distribute-patterns
+endif
-- 
2.7.4