diff --git a/wscript b/wscript
index 9297ea3..7ba2cf7 100644
--- a/wscript
+++ b/wscript
@@ -29,8 +29,6 @@ def options(opt):
 		help = 'allow targetting 64-bit engine(Linux/Windows/OSX x86 only) [default: %default]')
 	grp.add_option('--disable-werror', action = 'store_true', dest = 'DISABLE_WERROR', default = False,
 		help = 'disable compilation abort on warning')
-	grp.add_option('--enable-voicemgr', action = 'store_true', dest = 'USE_VOICEMGR', default = False,
-		help = 'Enable VOICE MANAGER')
 
 	opt.add_subproject('dlls')
 	opt.add_subproject('cl_dll')
@@ -181,22 +179,6 @@ def configure(conf):
 			conf.check_cc(lib='dl')
 		conf.check_cc(lib='m')
 
-	# check if we can use C99 tgmath
-	if conf.check_cc(header_name='tgmath.h', mandatory=False):
-		if conf.env.COMPILER_CC == 'msvc':
-			conf.define('_CRT_SILENCE_NONCONFORMING_TGMATH_H', 1)
-		tgmath_usable = conf.check_cc(fragment='''#include<tgmath.h>
-			const float val = 2, val2 = 3;
-			int main(void){ return (int)(-asin(val) + cos(val2)); }''',
-			msg='Checking if tgmath.h is usable', mandatory=False, use='M')
-		conf.define_cond('HAVE_TGMATH_H', tgmath_usable)
-	else:
-		conf.undefine('HAVE_TGMATH_H')
-	cmath_usable = conf.check_cxx(fragment='''#include<cmath>
-			int main(void){ return (int)sqrt(2.0f); }''',
-			msg='Checking if cmath is usable', mandatory = False)
-	conf.define_cond('HAVE_CMATH', cmath_usable)
-
 	if conf.env.COMPILER_CC == 'msvc':
 		conf.define('_CRT_SECURE_NO_WARNINGS', True)
 		conf.define('_CRT_NONSTDC_NO_DEPRECATE', True)