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authorAndreas Sandberg <andreas@sandberg.pp.se>2013-10-01 15:56:47 +0200
committerAndreas Sandberg <andreas@sandberg.pp.se>2013-10-01 15:56:47 +0200
commitd3d53938c05aa2cecd47fd8b29ec36f1c71303d5 (patch)
tree9c7280bc91b997e6e31b5325544d72db94b2d6d2
parent7c52865d1bd63e4b3a4352d6178a391e1b0ed29d (diff)
downloadgem5-d3d53938c05aa2cecd47fd8b29ec36f1c71303d5.tar.xz
scons, kvm: Check for the presence of POSIX timers
The kvm-based CPU module requires support for POSIX timers. This changeset adds a check for POSIX timers and ensures that gem5 is linked with librt if necessary. KVM support is disabled if POSIX timers are not supported by the host. This fixes a compilation issue for some glibc versions where clock_nanosleep and timer_create are in different libraries.
-rwxr-xr-xSConstruct8
1 files changed, 8 insertions, 0 deletions
diff --git a/SConstruct b/SConstruct
index 1a2c53211..863a6caba 100755
--- a/SConstruct
+++ b/SConstruct
@@ -913,6 +913,10 @@ have_posix_clock = \
conf.CheckLibWithHeader('rt', 'time.h', 'C',
'clock_nanosleep(0,0,NULL,NULL);')
+have_posix_timers = \
+ conf.CheckLibWithHeader([None, 'rt'], [ 'time.h', 'signal.h' ], 'C',
+ 'timer_create(CLOCK_MONOTONIC, NULL, NULL);')
+
if conf.CheckLib('tcmalloc'):
main.Append(CCFLAGS=main['TCMALLOC_CCFLAGS'])
elif conf.CheckLib('tcmalloc_minimal'):
@@ -1224,6 +1228,10 @@ for variant_path in variant_paths:
if not have_kvm:
print "Warning: Can not enable KVM, host seems to lack KVM support"
env['USE_KVM'] = False
+ elif not have_posix_timers:
+ print "Warning: Can not enable KVM, host seems to lack support " \
+ "for POSIX timers"
+ env['USE_KVM'] = False
elif not is_isa_kvm_compatible(env['TARGET_ISA']):
print "Info: KVM support disabled due to unsupported host and " \
"target ISA combination"