From: Peter Kokot <peterkokot@gmail.com>
Date: Wed, 5 Sep 2018 00:05:32 +0000 (+0200)
Subject: Remove HAVE_LIMITS_H
X-Git-Tag: v6.9.1~51^2
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=f0b4ac1bf90a55822239c3560a4e105c720d64e8;p=onig

Remove HAVE_LIMITS_H

The `<limits.h>` header file is part of the standard C89 headers [1] and
on current systems there is no need to do a manual check anymore if
header is present.

Build systems checked for the presence of the header file and defined
the `HAVE_LIMITS_H` symbol:
- Autoconf in configure.a [2]
- cmake in CMakeLists.txt

Refs:
[1] https://port70.net/~nsz/c/c89/c89-draft.html#4.1.4
[2] http://git.savannah.gnu.org/cgit/autoconf.git/tree/lib/autoconf/headers.m4
---

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 6aae87b..04d8ae8 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -39,7 +39,6 @@ check_include_files(stdint.h    HAVE_STDINT_H)
 check_include_files(stdlib.h    HAVE_STDLIB_H)
 check_include_files(strings.h   HAVE_STRINGS_H)
 check_include_files(string.h    HAVE_STRING_H)
-check_include_files(limits.h    HAVE_LIMITS_H)
 check_include_files(sys/times.h HAVE_SYS_TIMES_H)
 check_include_files(sys/time.h  HAVE_SYS_TIME_H)
 check_include_files(sys/types.h HAVE_SYS_TYPES_H)
diff --git a/configure.ac b/configure.ac
index fef00cd..5c9a086 100644
--- a/configure.ac
+++ b/configure.ac
@@ -50,7 +50,7 @@ dnl Checks for libraries.
 
 dnl Checks for header files.
 AC_HEADER_STDC
-AC_CHECK_HEADERS(stdlib.h string.h strings.h limits.h sys/time.h unistd.h sys/times.h)
+AC_CHECK_HEADERS(stdlib.h string.h strings.h sys/time.h unistd.h sys/times.h)
 
 dnl Checks for typedefs, structures, and compiler characteristics.
 AC_CHECK_SIZEOF(int, 4)
diff --git a/src/config.h.cmake.in b/src/config.h.cmake.in
index b59cc8d..f562a6b 100644
--- a/src/config.h.cmake.in
+++ b/src/config.h.cmake.in
@@ -31,9 +31,6 @@
 /* Define to 1 if you have the <string.h> header file. */
 #cmakedefine HAVE_STRING_H  ${HAVE_STRING_H}
 
-/* Define to 1 if you have the <limits.h> header file. */
-#cmakedefine HAVE_LIMITS_H ${HAVE_LIMITS_H}
-
 /* Define to 1 if you have the <sys/times.h> header file. */
 #cmakedefine HAVE_SYS_TIMES_H  ${HAVE_SYS_TIMES_H}
 
diff --git a/src/config.h.win32 b/src/config.h.win32
index 12609df..244dcc3 100644
--- a/src/config.h.win32
+++ b/src/config.h.win32
@@ -29,7 +29,6 @@
 #define STDC_HEADERS 1
 #define HAVE_STDLIB_H 1
 #define HAVE_STRING_H 1
-#define HAVE_LIMITS_H 1
 #define HAVE_FCNTL_H 1
 #define HAVE_SYS_UTIME_H 1
 #define HAVE_MEMORY_H 1
diff --git a/src/config.h.win64 b/src/config.h.win64
index e892086..5e89aec 100644
--- a/src/config.h.win64
+++ b/src/config.h.win64
@@ -29,7 +29,6 @@
 #define STDC_HEADERS 1
 #define HAVE_STDLIB_H 1
 #define HAVE_STRING_H 1
-#define HAVE_LIMITS_H 1
 #define HAVE_FCNTL_H 1
 #define HAVE_SYS_UTIME_H 1
 #define HAVE_MEMORY_H 1
diff --git a/src/config.h.windows.in b/src/config.h.windows.in
index 57fb426..31ccbdb 100644
--- a/src/config.h.windows.in
+++ b/src/config.h.windows.in
@@ -33,7 +33,6 @@
 #define STDC_HEADERS 1
 #define HAVE_STDLIB_H 1
 #define HAVE_STRING_H 1
-#define HAVE_LIMITS_H 1
 #define HAVE_FCNTL_H 1
 #define HAVE_SYS_UTIME_H 1
 #define HAVE_MEMORY_H 1
diff --git a/src/regint.h b/src/regint.h
index c3d1ee1..8fa210b 100644
--- a/src/regint.h
+++ b/src/regint.h
@@ -152,10 +152,7 @@
 
 
 #include <stddef.h>
-
-#ifdef HAVE_LIMITS_H
 #include <limits.h>
-#endif
 
 #ifdef HAVE_STDLIB_H
 #include <stdlib.h>