From: Andreas Sandberg Date: Tue, 1 Oct 2013 13:56:47 +0000 (+0200) Subject: scons, kvm: Check for the presence of POSIX timers X-Git-Tag: stable_2014_02_15~103 X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=d3d53938c05aa2cecd47fd8b29ec36f1c71303d5;p=gem5.git 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. --- 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"