Fixed bug 3797 - configure check for float.h

Ozkan Sezer

Cmake checks for float.h, but configure does not:  the attached patch
adds float.h to checked headers in configury, and it adds the missing
HAVE_FLOAT_H macro to SDL_config.h.cmake and SDL_config.h.in.

In SDL_config_macosx.h and SDL_config_windows.h, defined HAVE_FLOAT_H
as 1, where I know that it's true.

configure

@@ -16169,7 +16169,7 @@ $as_echo "#define STDC_HEADERS 1" >>confdefs.h
 
 fi
 
-    for ac_header in sys/types.h stdio.h stdlib.h stddef.h stdarg.h malloc.h memory.h string.h strings.h wchar.h inttypes.h stdint.h ctype.h math.h iconv.h signal.h
+    for ac_header in sys/types.h stdio.h stdlib.h stddef.h stdarg.h malloc.h memory.h string.h strings.h wchar.h inttypes.h stdint.h ctype.h math.h float.h iconv.h signal.h
 do :
   as_ac_Header=`$as_echo "ac_cv_header_$ac_header" | $as_tr_sh`
 ac_fn_c_check_header_mongrel "$LINENO" "$ac_header" "$as_ac_Header" "$ac_includes_default"

configure.in

@@ -234,7 +234,7 @@ if test x$enable_libc = xyes; then
 
     dnl Check for C library headers
     AC_HEADER_STDC
-    AC_CHECK_HEADERS(sys/types.h stdio.h stdlib.h stddef.h stdarg.h malloc.h memory.h string.h strings.h wchar.h inttypes.h stdint.h ctype.h math.h iconv.h signal.h)
+    AC_CHECK_HEADERS(sys/types.h stdio.h stdlib.h stddef.h stdarg.h malloc.h memory.h string.h strings.h wchar.h inttypes.h stdint.h ctype.h math.h float.h iconv.h signal.h)
 
     dnl Check for typedefs, structures, etc.
     AC_TYPE_SIZE_T

include/SDL_config.h.cmake

@@ -78,6 +78,7 @@
 #cmakedefine HAVE_STDINT_H 1
 #cmakedefine HAVE_CTYPE_H 1
 #cmakedefine HAVE_MATH_H 1
+#cmakedefine HAVE_FLOAT_H 1
 #cmakedefine HAVE_ICONV_H 1
 #cmakedefine HAVE_SIGNAL_H 1
 #cmakedefine HAVE_ALTIVEC_H 1

include/SDL_config.h.in

@@ -78,6 +78,7 @@
 #undef HAVE_STDINT_H
 #undef HAVE_CTYPE_H
 #undef HAVE_MATH_H
+#undef HAVE_FLOAT_H
 #undef HAVE_ICONV_H
 #undef HAVE_SIGNAL_H
 #undef HAVE_ALTIVEC_H

include/SDL_config_macosx.h

@@ -46,6 +46,7 @@
 #define HAVE_STDINT_H   1
 #define HAVE_CTYPE_H    1
 #define HAVE_MATH_H 1
+#define HAVE_FLOAT_H    1
 #define HAVE_SIGNAL_H   1
 
 /* C library functions */

include/SDL_config_windows.h

@@ -91,6 +91,7 @@ typedef unsigned int uintptr_t;
 #define HAVE_STRING_H 1
 #define HAVE_CTYPE_H 1
 #define HAVE_MATH_H 1
+#define HAVE_FLOAT_H 1
 #define HAVE_SIGNAL_H 1
 
 /* C library functions */