From cd9cd3483d3244aede3438960599d89ffc82039e Mon Sep 17 00:00:00 2001
From: Jakob Kaivo <jkk@ung.org>
Date: Thu, 8 Aug 2019 14:08:30 -0400
Subject: simpler and more correct tests for sybmolic macro existance

---
 Makefile |  5 ++++-
 _float.h | 27 +++++++++++++++++++++++++++
 float.c  | 10 +---------
 float.d  |  9 +++++++++
 4 files changed, 41 insertions(+), 10 deletions(-)
 create mode 100644 _float.h
 create mode 100644 float.d

diff --git a/Makefile b/Makefile
index 8b06b28..c50eef3 100644
--- a/Makefile
+++ b/Makefile
@@ -46,7 +46,7 @@ complex.o: complex.c test.h
 ctype.o: ctype.c test.h
 errno.o: errno.c test.h
 fenv.o: fenv.c test.h
-float.o: float.c test.h
+float.o: float.c test.h _float.h
 inttypes.o: inttypes.c test.h
 iso646.o: iso646.c test.h
 limits.o: limits.c test.h
@@ -74,5 +74,8 @@ wctype.o: wctype.c test.h
 test.o: test.c test.h
 main.o: main.c test.h
 
+_float.h: float.d
+	awk '{printf("#ifndef %s\n#error %s not defined\n#endif\n", $$0, $$0);}' float.d > $@
+
 clean:
 	rm -f *.o testlibc
diff --git a/_float.h b/_float.h
new file mode 100644
index 0000000..b438644
--- /dev/null
+++ b/_float.h
@@ -0,0 +1,27 @@
+#ifndef DBL_MANT_DIG
+#error DBL_MANT_DIG not defined
+#endif
+#ifndef DBL_MAX_EXP
+#error DBL_MAX_EXP not defined
+#endif
+#ifndef DBL_MIN_EXP
+#error DBL_MIN_EXP not defined
+#endif
+#ifndef FLT_MANT_DIG
+#error FLT_MANT_DIG not defined
+#endif
+#ifndef FLT_MAX_EXP
+#error FLT_MAX_EXP not defined
+#endif
+#ifndef FLT_MIN_EXP
+#error FLT_MIN_EXP not defined
+#endif
+#ifndef LDBL_MANT_DIG
+#error LDBL_MANT_DIG not defined
+#endif
+#ifndef LDBL_MAX_EXP
+#error LDBL_MAX_EXP not defined
+#endif
+#ifndef LDBL_MIN_EXP
+#error LDBL_MIN_EXP not defined
+#endif
diff --git a/float.c b/float.c
index e93c3c9..f7ab590 100644
--- a/float.c
+++ b/float.c
@@ -1,4 +1,5 @@
 #include <float.h>
+#include "_float.h"
 #include "test.h"
 
 void test_float_h(void)
@@ -6,26 +7,17 @@ void test_float_h(void)
 	testing_header("float.h");
 
 	test_min(DBL_DIG, 10);
-	test_defined(DBL_MANT_DIG);
 	test_min(DBL_MAX_10_EXP, 37);
-	test_defined(DBL_MAX_EXP);
 	test_min(DBL_MIN_10_EXP, -37);
-	test_defined(DBL_MIN_EXP);
 
 	test_min(FLT_DIG, 6);
-	test_defined(FLT_MANT_DIG);
 	test_min(FLT_MAX_10_EXP, 37);
-	test_defined(FLT_MAX_EXP);
 	test_min(FLT_MIN_10_EXP, -37);
-	test_defined(FLT_MIN_EXP);
 	test_min(FLT_RADIX, 2);
 	
 	test_min(LDBL_DIG, 6);
-	test_defined(LDBL_MANT_DIG);
 	test_min(LDBL_MAX_10_EXP, 37);
-	test_defined(LDBL_MAX_EXP);
 	test_min(LDBL_MIN_10_EXP, -37);
-	test_defined(LDBL_MIN_EXP);
 
 	test_min(DBL_MAX, 1e+37);
 	test_min(FLT_MAX, 1e+37);
diff --git a/float.d b/float.d
new file mode 100644
index 0000000..12b21de
--- /dev/null
+++ b/float.d
@@ -0,0 +1,9 @@
+DBL_MANT_DIG
+DBL_MAX_EXP
+DBL_MIN_EXP
+FLT_MANT_DIG
+FLT_MAX_EXP
+FLT_MIN_EXP
+LDBL_MANT_DIG
+LDBL_MAX_EXP
+LDBL_MIN_EXP
-- 
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