From ecd431535b8bb70d1b0b5f944d9053d6d85e084a Mon Sep 17 00:00:00 2001
From: Erwin Janssen <erwinjanssen@outlook.com>
Date: Sat, 24 Sep 2016 03:13:23 +0200
Subject: [PATCH] Remove define and usage of `_hdr_float`

The header file float.h is part of the standard C library, so we can
assume it is always available. This header file also isn't included in the
sfio build when `_SFBINARY` is defined, resulting in a failed build.
The checks defining `_hdr_float` are removed and <float.h> is only
included were required in lib/sfio: in sfputd.c
---
 ast_common.h.in              | 4 ----
 lib/sfio/features/sfio       | 1 -
 lib/sfio/sfhdr.h             | 5 -----
 lib/sfio/sfputd.c            | 2 ++
 windows/include/FEATURE/sfio | 1 -
 5 files changed, 2 insertions(+), 11 deletions(-)

diff --git a/ast_common.h.in b/ast_common.h.in
index cb35cbdbb..a374a6681 100644
--- a/ast_common.h.in
+++ b/ast_common.h.in
@@ -7,10 +7,6 @@
 #  define _sys_types 1
 #endif
 
-#ifdef HAVE_FLOAT_H
-#  define _hdr_float 1
-#endif
-
 #ifdef HAVE_SYS_TYPES_H
 #  define _sys_types 1
 #endif
diff --git a/lib/sfio/features/sfio b/lib/sfio/features/sfio
index aee3ad144..70dba1df3 100644
--- a/lib/sfio/features/sfio
+++ b/lib/sfio/features/sfio
@@ -14,7 +14,6 @@ lib qfrexp
 lib qldexp
 
 hdr unistd
-hdr float
 lib atexit
 lib onexit
 
diff --git a/lib/sfio/sfhdr.h b/lib/sfio/sfhdr.h
index 6d3e8eddd..82ffbb2cd 100644
--- a/lib/sfio/sfhdr.h
+++ b/lib/sfio/sfhdr.h
@@ -80,7 +80,6 @@ extern "C" {
 #undef  _hdr_vfork
 #undef  _sys_vfork
 #undef  _lib_vfork
-#undef  _hdr_float
 #undef  _hdr_math
 #undef  _sys_mman
 #undef  _hdr_mman
@@ -228,10 +227,6 @@ extern "C" {
 #include	<math.h>
 #endif
 
-#if _hdr_float
-#include	<float.h>
-#endif
-
 #if !defined(_ast_fltmax_double)
 
 #if defined(_lib_qfrexp) && _lib_qldexp
diff --git a/lib/sfio/sfputd.c b/lib/sfio/sfputd.c
index dfe48a0a6..e5459eeb6 100644
--- a/lib/sfio/sfputd.c
+++ b/lib/sfio/sfputd.c
@@ -13,6 +13,8 @@
 
 #include	"sfhdr.h"
 
+#include <float.h>
+
 /*	Write out a floating point value in a portable format
 **
 **	Written by Kiem-Phong Vo.
diff --git a/windows/include/FEATURE/sfio b/windows/include/FEATURE/sfio
index 49f199a31..7a6e303b3 100644
--- a/windows/include/FEATURE/sfio
+++ b/windows/include/FEATURE/sfio
@@ -6,7 +6,6 @@
 #define _sys_time	1	/* #include <sys/time.h> ok */
 #define _hdr_math	1	/* #include <math.h> ok */
 //#define _hdr_unistd	1	/* #include <unistd.h> ok */
-#define _hdr_float	1	/* #include <float.h> ok */
 #define _lib_atexit	1	/* atexit() in default lib(s) */
 #define _lib_ftruncate	0	/* ftruncate() in default lib(s) */
 #define _lib_lseek64	1	/* lseek64() in default lib(s) */
-- 
2.40.0