From e44cca47c569ce0bf6738caf0029e399123cb1ec Mon Sep 17 00:00:00 2001
From: Kazuki Yamaguchi <k@rhe.jp>
Date: Fri, 14 Apr 2017 12:04:20 +0900
Subject: configure.in: don't check for time.h

It's part of C89.
---
 configure.in           | 21 +++++----------------
 include/ruby/missing.h |  4 +---
 win32/Makefile.sub     |  1 -
 3 files changed, 6 insertions(+), 20 deletions(-)

diff --git a/configure.in b/configure.in
index e4ebc705c9..294eaa8733 100644
--- a/configure.in
+++ b/configure.in
@@ -1416,7 +1416,6 @@ AC_CHECK_HEADERS(sys/times.h)
 AC_CHECK_HEADERS(sys/uio.h)
 AC_CHECK_HEADERS(sys/utime.h)
 AC_CHECK_HEADERS(syscall.h)
-AC_CHECK_HEADERS(time.h)
 AC_CHECK_HEADERS(ucontext.h)
 AC_CHECK_HEADERS(utime.h)
 
@@ -2039,18 +2038,14 @@ AC_CHECK_MEMBERS([struct stat.st_ctimespec])
 AC_CHECK_MEMBERS([struct stat.st_ctimensec])
 AC_CHECK_MEMBERS([struct stat.st_birthtimespec])
 
-AC_CHECK_TYPES([struct timeval], [], [], [@%:@ifdef HAVE_TIME_H
-@%:@include <time.h>
-@%:@endif
+AC_CHECK_TYPES([struct timeval], [], [], [@%:@include <time.h>
 @%:@ifdef HAVE_SYS_TIME_H
 @%:@include <sys/time.h>
 @%:@endif])
 
 AS_IF([test "${ac_cv_type_struct_timeval}" = yes], [
     RUBY_CHECK_SIZEOF([struct timeval.tv_sec], [time_t long "long long"], [],
-		      [@%:@ifdef HAVE_TIME_H
-@%:@include <time.h>
-@%:@endif
+		      [@%:@include <time.h>
 @%:@ifdef HAVE_SYS_TIME_H
 @%:@include <sys/time.h>
 @%:@endif])
@@ -2064,23 +2059,17 @@ AS_IF([test "${ac_cv_type_struct_timeval}" = yes], [
     ])
 ])
 
-AC_CHECK_TYPES([struct timespec], [], [], [@%:@ifdef HAVE_TIME_H
-@%:@include <time.h>
-@%:@endif
+AC_CHECK_TYPES([struct timespec], [], [], [@%:@include <time.h>
 @%:@ifdef HAVE_SYS_TIME_H
 @%:@include <sys/time.h>
 @%:@endif])
 
-AC_CHECK_TYPES([struct timezone], [], [], [@%:@ifdef HAVE_TIME_H
-@%:@ include <time.h>
-@%:@endif
+AC_CHECK_TYPES([struct timezone], [], [], [@%:@ include <time.h>
 @%:@ifdef HAVE_SYS_TIME_H
 @%:@ include <sys/time.h>
 @%:@endif])
 
-AC_CHECK_TYPES([clockid_t], [], [], [@%:@ifdef HAVE_TIME_H
-@%:@ include <time.h>
-@%:@endif
+AC_CHECK_TYPES([clockid_t], [], [], [@%:@ include <time.h>
 @%:@ifdef HAVE_SYS_TIME_H
 @%:@ include <sys/time.h>
 @%:@endif])
diff --git a/include/ruby/missing.h b/include/ruby/missing.h
index a3d7a6b7b7..fb5c3130c9 100644
--- a/include/ruby/missing.h
+++ b/include/ruby/missing.h
@@ -29,9 +29,7 @@ extern "C" {
 #endif
 
 #if !defined(HAVE_STRUCT_TIMEVAL) || !defined(HAVE_STRUCT_TIMESPEC)
-#if defined(HAVE_TIME_H)
-# include <time.h>
-#endif
+#include <time.h>
 #if defined(HAVE_SYS_TIME_H)
 # include <sys/time.h>
 #endif
diff --git a/win32/Makefile.sub b/win32/Makefile.sub
index 147a6171a3..7aab81deb4 100644
--- a/win32/Makefile.sub
+++ b/win32/Makefile.sub
@@ -635,7 +635,6 @@ $(CONFIG_H): $(MKFILES) $(srcdir)/win32/Makefile.sub $(win_srcdir)/Makefile.sub
 #define HAVE_DECL_SYS_NERR 1
 #define HAVE_FCNTL_H 1
 #define HAVE_SYS_UTIME_H 1
-#define HAVE_TIME_H 1
 #define rb_pid_t int
 #define rb_gid_t int
 #define rb_uid_t int
-- 
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