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"""
Scans through a list list of libraries and adds
available libraries to the environment.
"""
def AddAvailableLibs(env, libs):
conf = env.Configure()
for lib in libs:
conf.CheckLib(lib)
conf.Finish()
"""
Checks if a compiler flag is valid.
"""
def check_compile_flag(ctx, flag):
ctx.Message('Checking for compiler flag %s... ' % flag)
old_flags = ctx.env['CCFLAGS']
ctx.env.Append(CCFLAGS = flag)
test = """
int main() {
return 0;
}
"""
result = ctx.TryCompile(test, '.c')
ctx.Result(result)
if not result:
ctx.env.Replace(CCFLAGS = old_flags)
return result
"""
Checks if a linker flag is valid.
"""
def check_link_flag(ctx, flag, run = 0, extension = '.c', code = None):
ctx.Message('Checking for linker flag %s... ' % flag)
old_flags = ctx.env['LINKFLAGS']
ctx.env.Append(LINKFLAGS = flag)
if code:
test = code
else:
test = """
int main() {
return 0;
}
"""
result = ctx.TryLink(test, extension)
if run:
result = result and ctx.TryRun(test, extension)[0]
ctx.Result(result)
if not result:
ctx.env.Replace(LINKFLAGS = old_flags)
return result
"""
Wrapper for env.Configure which adds two new tests:
CheckCompileFlag - checks for a compiler flag
CheckLinkFlag - checks for a linker flag
"""
def FlagsConfigure(env):
return env.Configure(custom_tests = { 'CheckCompileFlag' : check_compile_flag, 'CheckLinkFlag': check_link_flag })
Export('AddAvailableLibs FlagsConfigure')
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