From: Paolo Bonzini <pbonzini@redhat.com>
Date: Thu, 11 Apr 2019 13:51:19 +0000 (+0200)
Subject: selftests: kvm: fix for compilers that do not support -no-pie
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=c2390f16fc5b847a22f442a190d459beba07e86f;p=openwrt%2Fstaging%2Fblogic.git

selftests: kvm: fix for compilers that do not support -no-pie

-no-pie was added to GCC at the same time as their configuration option
--enable-default-pie.  Compilers that were built before do not have
-no-pie, but they also do not need it.  Detect the option at build
time.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---

diff --git a/tools/testing/selftests/kvm/Makefile b/tools/testing/selftests/kvm/Makefile
index 7514fcea91a7..2d2e10b219d5 100644
--- a/tools/testing/selftests/kvm/Makefile
+++ b/tools/testing/selftests/kvm/Makefile
@@ -1,3 +1,5 @@
+include ../../../../scripts/Kbuild.include
+
 all:
 
 top_srcdir = ../../../..
@@ -30,7 +32,11 @@ INSTALL_HDR_PATH = $(top_srcdir)/usr
 LINUX_HDR_PATH = $(INSTALL_HDR_PATH)/include/
 LINUX_TOOL_INCLUDE = $(top_srcdir)/tools/include
 CFLAGS += -O2 -g -std=gnu99 -fno-stack-protector -fno-PIE -I$(LINUX_TOOL_INCLUDE) -I$(LINUX_HDR_PATH) -Iinclude -I$(<D) -Iinclude/$(UNAME_M) -I..
-LDFLAGS += -pthread -no-pie
+
+no-pie-option := $(call try-run, echo 'int main() { return 0; }' | \
+        $(CC) -Werror $(KBUILD_CPPFLAGS) $(CC_OPTION_CFLAGS) -no-pie -x c - -o "$$TMP", -no-pie)
+
+LDFLAGS += -pthread $(no-pie-option)
 
 # After inclusion, $(OUTPUT) is defined and
 # $(TEST_GEN_PROGS) starts with $(OUTPUT)/