Revert to commit 87ce7ceddab2294d5e6f8d6c4c99837309757874

and disable the building of test-double-system and test-float-system
by default

test/Makefile

@@ -1,7 +1,7 @@
 OPENLIBM_HOME=$(abspath ..)
 include ../Make.inc
 
-all: test-double test-float test-double-system # test-float-system
+all: test-double test-float # test-double-system test-float-system
 
 test-double: test-double.c libm-test.c
 	$(CC) -g $@.c -D__BSD_VISIBLE -I ../include -I../src ../libopenlibm.a -o $@

test/libm-test.c

@@ -224,7 +224,7 @@ static FLOAT max_error, real_max_error, imag_max_error;
 #define MANT_DIG CHOOSE ((LDBL_MANT_DIG-1), (DBL_MANT_DIG-1), (FLT_MANT_DIG-1),  \
                          (LDBL_MANT_DIG-1), (DBL_MANT_DIG-1), (FLT_MANT_DIG-1))
 
-#if defined(__WIN32__) || defined(__APPLE__)
+#ifndef SYS_MATH_H
 void FUNC(sincos) (int n, FLOAT *s, FLOAT *c)
 {
 	*s = FUNC(sin) ( *s );