path: root/Makefile.target
diff options
authorAlexey Kardashevskiy <aik@ozlabs.ru>2014-07-01 17:30:27 +1000
committerPaolo Bonzini <pbonzini@redhat.com>2014-07-01 10:36:28 +0200
commitf80ea9862fed7ca89a672785bdce0e2611f9ba97 (patch)
tree45a86142fb457318c12b712e4dcb3a19552577cb /Makefile.target
parent424baff549a9c8a7b5e814ce2bcb857d25163468 (diff)
configure: Fix -lm test, so that tools can be compiled on hosts that require -lm
The existing test whether "-lm" needs to be included or not is insufficient as it reports false negative on Fedora20/ppc64. This happens because sin(0.0) is a constant value which compiler can safely throw away and therefore there is no need to add "-lm". As the result, qemu-nbd/qemu-io/qemu-img tools cannot compile. This adds a global variable and uses it in the test to prevent from optimization. Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> [Use Peter's improvement on the test to fool LTO, and remove the now useless -lm addition in Makefile.target. - Paolo] Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'Makefile.target')
1 files changed, 0 insertions, 4 deletions
diff --git a/Makefile.target b/Makefile.target
index 6089d290df..137d0b0517 100644
--- a/Makefile.target
+++ b/Makefile.target
@@ -163,10 +163,6 @@ dummy := $(call unnest-vars,.., \
all-obj-y += $(common-obj-y)
all-obj-$(CONFIG_SOFTMMU) += $(block-obj-y)
# build either PROG or PROGW
$(QEMU_PROG_BUILD): $(all-obj-y) ../libqemuutil.a ../libqemustub.a
$(call LINK,$^)