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From: Paolo Bonzini <pbonzini@redhat.com>
To: linux-kernel@vger.kernel.org, kvm@vger.kernel.org
Cc: vkuznets@redhat.com,
	Sean Christopherson <sean.j.christopherson@intel.com>
Subject: [PATCH 2/3] selftests: kvm: fix for compilers that do not support -no-pie
Date: Thu, 11 Apr 2019 18:48:27 +0200	[thread overview]
Message-ID: <1555001308-36016-3-git-send-email-pbonzini@redhat.com> (raw)
In-Reply-To: <1555001308-36016-1-git-send-email-pbonzini@redhat.com>

-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>
---
 tools/testing/selftests/kvm/Makefile | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

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)/
-- 
1.8.3.1



  parent reply	other threads:[~2019-04-11 16:48 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-04-11 16:48 [PATCH 0/3] kvm: selftests fixes and a new smm_test Paolo Bonzini
2019-04-11 16:48 ` [PATCH 1/3] selftests: kvm/evmcs_test: complete I/O before migrating guest state Paolo Bonzini
2019-04-16 13:39   ` Andrew Jones
2019-04-11 16:48 ` Paolo Bonzini [this message]
2019-04-11 16:48 ` [PATCH 3/3] selftests: kvm: add a selftest for SMM Paolo Bonzini

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