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qemu/0040-build-link-with-libatomic-on-powerp.patch

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From f210e8f540cb261c11bffa4ed8e9918ad1731a9b Mon Sep 17 00:00:00 2001
From: Olaf Hering <olaf@aepfle.de>
Date: Fri, 1 Apr 2016 12:27:16 +0200
Subject: [PATCH] build: link with libatomic on powerpc-linux
Building on powerpc-linux fails with undefined reference to
__atomic_load_8 in icount_warp_rt(). Force linking to -latomic.
Fixes a0aa44b ("include/qemu/atomic.h: default to __atomic functions")
Signed-off-by: Olaf Hering <olaf@aepfle.de>
---
configure | 27 +++++++++++++++++++++++++++
1 file changed, 27 insertions(+)
diff --git a/configure b/configure
index bf74354..8892b36 100755
--- a/configure
+++ b/configure
@@ -4033,6 +4033,33 @@ if test "$usb_redir" != "no" ; then
fi
fi
+if test "$linux_user" = "no" -a "$cpu" = "ppc" -a "$targetos" = "Linux" ; then
+ # Do we need libm
+ cat > $TMPC << EOF
+ #include <unistd.h>
+ #include <stdint.h>
+ #include <qemu/atomic.h>
+ int64_t val;
+ int main(int argc, char **argv)
+ {
+ val = (int64_t)read(0, NULL, 0);
+ if (atomic_read(&val) == -1) {
+ return 0;
+ }
+ return 1;
+ }
+EOF
+ if compile_prog "-Iinclude" "" ; then
+ :
+ echo "No need to link with -latomic on powerpc-linux"
+ elif compile_prog "-Iinclude" "-latomic" ; then
+ echo "Link with -latomic on powerpc-linux"
+ libs_softmmu="$libs_softmmu -latomic"
+ else
+ error_exit "libatomic check failed"
+ fi
+fi
+
##########################################
# check if we have VSS SDK headers for win