diff options
Diffstat (limited to 'src')
| -rwxr-xr-x | src/SConscript | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/src/SConscript b/src/SConscript index 3e7c4c9e9..8c407f4c7 100755 --- a/src/SConscript +++ b/src/SConscript @@ -943,15 +943,26 @@ ccflags = {'debug' : [], 'opt' : ['-g'], 'fast' : [], 'prof' : ['-g', '-pg'], ldflags = {'debug' : [], 'opt' : [], 'fast' : [], 'prof' : ['-pg'], 'perf' : ['-Wl,--no-as-needed', '-lprofiler', '-Wl,--as-needed']} +# For Link Time Optimization, the optimisation flags used to compile +# individual files are decoupled from those used at link time +# (i.e. you can compile with -O3 and perform LTO with -O0), so we need +# to also update the linker flags based on the target. if env['GCC']: if sys.platform == 'sunos5': ccflags['debug'] += ['-gstabs+'] else: ccflags['debug'] += ['-ggdb3'] ldflags['debug'] += ['-O0'] - # opt, fast, prof and perf all share the same cc flags + # opt, fast, prof and perf all share the same cc flags, also add + # the optimization to the ldflags as LTO defers the optimization + # to link time for target in ['opt', 'fast', 'prof', 'perf']: ccflags[target] += ['-O3'] + ldflags[target] += ['-O3'] + + ccflags['fast'] += env['LTO_CCFLAGS'] + ldflags['fast'] += env['LTO_LDFLAGS'] + elif env['SUNCC']: ccflags['debug'] += ['-g0'] ccflags['opt'] += ['-O'] |