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Merge pull request #33 from chavafg/topic/qemu-config-centos

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qemu: disable fno-semantic-interposition for old gcc
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Eric Ernst 2018-05-15 15:50:31 -07:00 committed by GitHub
commit d1bfd7ea17
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1 changed files with 12 additions and 1 deletions
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11
scripts/configure-hypervisor.sh
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@ -196,6 +196,14 @@ main()
[ -n "${qemu_version_minor}" ] \ [ -n "${qemu_version_minor}" ] \
|| die "cannot determine qemu minor version from file $qemu_version_file" || die "cannot determine qemu minor version from file $qemu_version_file"
local gcc_version_major=$(gcc -dumpversion | cut -f1 -d.)
local gcc_version_minor=$(gcc -dumpversion | cut -f2 -d.)
[ -n "${gcc_version_major}" ] \
|| die "cannot determine gcc major version, please ensure it is installed"
[ -n "${gcc_version_minor}" ] \
|| die "cannot determine gcc minor version, please ensure it is installed"
arch=$(arch) arch=$(arch)
# Array of configure options. # Array of configure options.
@ -362,7 +370,10 @@ main()
# Improve code quality by assuming identical semantics for interposed # Improve code quality by assuming identical semantics for interposed
# synmbols. # synmbols.
# Only enable if gcc is 5.3 or newer
if [ "${gcc_version_major}" -ge 5 ] && [ "${gcc_version_minor}" -ge 3 ]; then
_qemu_cflags+=" -fno-semantic-interposition" _qemu_cflags+=" -fno-semantic-interposition"
fi
# Performance optimisation # Performance optimisation
_qemu_cflags+=" -falign-functions=32" _qemu_cflags+=" -falign-functions=32"