build: remove HAVE_LIMITS_H check

.. because limits.h presence isn't optional, it's required by C89.

Ref: http://port70.net/~nsz/c/c89/c89-draft.html#2.2.4.2

Closes https://github.com/curl/curl/pull/2215

19 files changed, 2 insertions, 44 deletions

diff --git a/lib/Makefile.netware b/lib/Makefile.netware
index a4ec4c8f3..f4b6528eb 100644
--- a/lib/Makefile.netware
+++ b/lib/Makefile.netware
@@ -589,7 +589,6 @@ endif
 	@echo $(DL)#define HAVE_INET_ADDR 1$(DL) >> $@
 	@echo $(DL)#define HAVE_IOCTL 1$(DL) >> $@
 	@echo $(DL)#define HAVE_IOCTL_FIONBIO 1$(DL) >> $@
-	@echo $(DL)#define HAVE_LIMITS_H 1$(DL) >> $@
 	@echo $(DL)#define HAVE_LL 1$(DL) >> $@
 	@echo $(DL)#define HAVE_LOCALE_H 1$(DL) >> $@
 	@echo $(DL)#define HAVE_LOCALTIME_R 1$(DL) >> $@
diff --git a/lib/asyn-ares.c b/lib/asyn-ares.c
index 38ede999c..aa581a49a 100644
--- a/lib/asyn-ares.c
+++ b/lib/asyn-ares.c
@@ -30,9 +30,7 @@
 
 #ifdef CURLRES_ARES
 
-#ifdef HAVE_LIMITS_H
 #include <limits.h>
-#endif
 #ifdef HAVE_NETINET_IN_H
 #include <netinet/in.h>
 #endif
diff --git a/lib/config-dos.h b/lib/config-dos.h
index eec7af988..ff1ea1558 100644
--- a/lib/config-dos.h
+++ b/lib/config-dos.h
@@ -53,7 +53,6 @@
 #define HAVE_IOCTL_FIONBIO     1
 #define HAVE_IOCTLSOCKET       1
 #define HAVE_IOCTLSOCKET_FIONBIO   1
-#define HAVE_LIMITS_H          1
 #define HAVE_LOCALE_H          1
 #define HAVE_LONGLONG          1
 #define HAVE_MEMORY_H          1
diff --git a/lib/config-symbian.h b/lib/config-symbian.h
index 92983d242..d23de3325 100644
--- a/lib/config-symbian.h
+++ b/lib/config-symbian.h
@@ -318,9 +318,6 @@
 /* Define to 1 if you have the `ssl' library (-lssl). */
 /*#define HAVE_LIBSSL 1*/
 
-/* Define to 1 if you have the <limits.h> header file. */
-#define HAVE_LIMITS_H 1
-
 /* if your compiler supports LL */
 #define HAVE_LL 1
 
diff --git a/lib/config-tpf.h b/lib/config-tpf.h
index d1eb3d906..778d9833f 100644
--- a/lib/config-tpf.h
+++ b/lib/config-tpf.h
@@ -284,9 +284,6 @@
 /* if zlib is available */
 /* #undef HAVE_LIBZ */
 
-/* Define to 1 if you have the <limits.h> header file. */
-#define HAVE_LIMITS_H 1
-
 /* if your compiler supports LL */
 #define HAVE_LL 1
 
diff --git a/lib/config-vxworks.h b/lib/config-vxworks.h
index 780a4a225..19f2d2354 100644
--- a/lib/config-vxworks.h
+++ b/lib/config-vxworks.h
@@ -384,9 +384,6 @@
 /* if zlib is available */
 #define HAVE_LIBZ 1
 
-/* Define to 1 if you have the <limits.h> header file. */
-#define HAVE_LIMITS_H 1
-
 /* if your compiler supports LL */
 #define HAVE_LL 1
 
diff --git a/lib/config-win32.h b/lib/config-win32.h
index 309f701a9..3e5567df2 100644
--- a/lib/config-win32.h
+++ b/lib/config-win32.h
@@ -61,9 +61,6 @@
 /* Define if you have the <io.h> header file. */
 #define HAVE_IO_H 1
 
-/* Define if you have the <limits.h> header file. */
-#define HAVE_LIMITS_H 1
-
 /* Define if you have the <locale.h> header file. */
 #define HAVE_LOCALE_H 1
 
diff --git a/lib/config-win32ce.h b/lib/config-win32ce.h
index 28a15f2a1..182052290 100644
--- a/lib/config-win32ce.h
+++ b/lib/config-win32ce.h
@@ -54,9 +54,6 @@
 /* Define if you have the <io.h> header file.  */
 #define HAVE_IO_H 1
 
-/* Define if you have the <limits.h> header file.  */
-#define HAVE_LIMITS_H 1
-
 /* Define if you need the malloc.h header header file even with stdlib.h  */
 #define NEED_MALLOC_H 1
 
diff --git a/lib/curl_config.h.cmake b/lib/curl_config.h.cmake
index e4d14c784..e640cc656 100644
--- a/lib/curl_config.h.cmake
+++ b/lib/curl_config.h.cmake
@@ -398,9 +398,6 @@
 /* if zlib is available */
 #cmakedefine HAVE_LIBZ 1
 
-/* Define to 1 if you have the <limits.h> header file. */
-#cmakedefine HAVE_LIMITS_H 1
-
 /* if your compiler supports LL */
 #cmakedefine HAVE_LL 1
 
diff --git a/lib/parsedate.c b/lib/parsedate.c
index b82605bbe..0fabbd269 100644
--- a/lib/parsedate.c
+++ b/lib/parsedate.c
@@ -75,9 +75,7 @@
 
 #include "curl_setup.h"
 
-#ifdef HAVE_LIMITS_H
 #include <limits.h>
-#endif
 
 #include <curl/curl.h>
 #include "strcase.h"
diff --git a/lib/security.c b/lib/security.c
index 9b989681f..ac39dae09 100644
--- a/lib/security.c
+++ b/lib/security.c
@@ -50,9 +50,7 @@
 #include <netdb.h>
 #endif
 
-#ifdef HAVE_LIMITS_H
 #include <limits.h>
-#endif
 
 #include "urldata.h"
 #include "curl_base64.h"
diff --git a/lib/setopt.c b/lib/setopt.c
index f40b78e0b..49b7fac63 100644
--- a/lib/setopt.c
+++ b/lib/setopt.c
@@ -22,9 +22,7 @@
 
 #include "curl_setup.h"
 
-#ifdef HAVE_LIMITS_H
 #include <limits.h>
-#endif
 
 #ifdef HAVE_NETINET_IN_H
 #include <netinet/in.h>
diff --git a/lib/ssh-libssh.c b/lib/ssh-libssh.c
index fb49a22d5..56775d70d 100644
--- a/lib/ssh-libssh.c
+++ b/lib/ssh-libssh.c
@@ -27,9 +27,7 @@
 
 #ifdef USE_LIBSSH
 
-#ifdef HAVE_LIMITS_H
 #include <limits.h>
-#endif
 
 #include <libssh/libssh.h>
 #include <libssh/sftp.h>
diff --git a/lib/ssh.c b/lib/ssh.c
index bf07432bd..6516c5d37 100644
--- a/lib/ssh.c
+++ b/lib/ssh.c
@@ -26,9 +26,7 @@
 
 #ifdef USE_LIBSSH2
 
-#ifdef HAVE_LIMITS_H
-#  include <limits.h>
-#endif
+#include <limits.h>
 
 #include <libssh2.h>
 #include <libssh2_sftp.h>
diff --git a/lib/url.c b/lib/url.c
index a4f3f37f8..d45da5e72 100644
--- a/lib/url.c
+++ b/lib/url.c
@@ -55,9 +55,7 @@
 #error "We can't compile without socket() support!"
 #endif
 
-#ifdef HAVE_LIMITS_H
 #include <limits.h>
-#endif
 
 #ifdef USE_LIBIDN2
 #include <idn2.h>
diff --git a/lib/vtls/cyassl.c b/lib/vtls/cyassl.c
index e06522304..46b71bfd3 100644
--- a/lib/vtls/cyassl.c
+++ b/lib/vtls/cyassl.c
@@ -76,9 +76,7 @@ and that's a problem since options.h hasn't been included yet. */
 #endif
 #endif
 
-#ifdef HAVE_LIMITS_H
 #include <limits.h>
-#endif
 
 #include "urldata.h"
 #include "sendf.h"
diff --git a/lib/vtls/darwinssl.c b/lib/vtls/darwinssl.c
index 316904224..53a7ec37b 100644
--- a/lib/vtls/darwinssl.c
+++ b/lib/vtls/darwinssl.c
@@ -39,9 +39,7 @@
 #pragma clang diagnostic ignored "-Wtautological-pointer-compare"
 #endif /* __clang__ */
 
-#ifdef HAVE_LIMITS_H
 #include <limits.h>
-#endif
 
 #include <Security/Security.h>
 /* For some reason, when building for iOS, the omnibus header above does
diff --git a/lib/vtls/gskit.c b/lib/vtls/gskit.c
index de496dd12..8f0cc0bb8 100644
--- a/lib/vtls/gskit.c
+++ b/lib/vtls/gskit.c
@@ -61,9 +61,7 @@
 #endif
 
 
-#ifdef HAVE_LIMITS_H
-#  include <limits.h>
-#endif
+#include <limits.h>
 
 #include <curl/curl.h>
 #include "urldata.h"
diff --git a/lib/vtls/openssl.c b/lib/vtls/openssl.c
index 89f873342..8680af2f2 100644
--- a/lib/vtls/openssl.c
+++ b/lib/vtls/openssl.c
@@ -34,9 +34,7 @@
 
 #ifdef USE_OPENSSL
 
-#ifdef HAVE_LIMITS_H
 #include <limits.h>
-#endif
 
 #include "urldata.h"
 #include "sendf.h"