build: suppress GNU ld 2.39 warning about RWX load segments

We cannot really avoid such and we're also not really at risk because of
them, as we control page table permissions ourselves rather than relying
on a loader of some sort.

Signed-off-by: Jan Beulich <jbeulich@suse.com>
Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com>

diff --git a/build/common.mk b/build/common.mk
index 90c216960c9c73c1f4c2e46669d1d3cec33af2bb..63345b3de299ae8b625512b85f8ff710b7567fbb 100644 (file)
--- a/build/common.mk
+++ b/build/common.mk
@@ -20,9 +20,15 @@ COMMON_FLAGS := -pipe -I$(ROOT)/include -I$(ROOT)/arch/x86/include -MMD -MP
 cc-option = $(shell if [ -z "`echo 'int p=1;' | $(CC) $(1) -S -o /dev/null -x c - 2>&1`" ]; \
                        then echo y; else echo n; fi)
 
+ld-option = $(shell if $(LD) -v $(1) >/dev/null 2>&1; then echo y; else echo n; fi)
+
 # Disable PIE, but need to check if compiler supports it
 COMMON_CFLAGS-$(call cc-option,-no-pie) += -no-pie
 
+# Suppress warnings about LOAD segments with RWX permissions, as what we build
+# aren't normal user-mode executables.
+LDFLAGS-$(call ld-option,--warn-rwx-segments) += --no-warn-rwx-segments
+
 COMMON_AFLAGS := $(COMMON_FLAGS) -D__ASSEMBLY__
 COMMON_CFLAGS := $(COMMON_FLAGS) $(COMMON_CFLAGS-y)
 COMMON_CFLAGS += -Wall -Wextra -Werror -std=gnu99 -Wstrict-prototypes -O3 -g