From 1d914cc031ff246ac8c696ade2f38aa480115730 Mon Sep 17 00:00:00 2001
From: LoRd_MuldeR <mulder2@gmx.de>
Date: Tue, 22 Nov 2022 23:59:52 +0100
Subject: [PATCH] Linux build fixes.

---
 hashset/Makefile              | 2 +-
 hashset/src/main.c            | 1 +
 libhashset/Makefile           | 2 +-
 libhashset/include/hash_set.h | 9 +++++++--
 libhashset/src/hash_set.c     | 1 +
 5 files changed, 11 insertions(+), 4 deletions(-)

diff --git a/hashset/Makefile b/hashset/Makefile
index 206236d..31223af 100644
--- a/hashset/Makefile
+++ b/hashset/Makefile
@@ -13,7 +13,7 @@ endif
   EXE_SUFFIX := .exe
 endif
 
-CFLAGS = -O3 -DNDEBUG -I../libhashset/include $(XCFLAGS)
+CFLAGS = -std=c99 -O3 -DNDEBUG -D_DEFAULT_SOURCE -Wpedantic -I../libhashset/include $(XCFLAGS)
 
 SRC_PATH := src
 BIN_PATH := bin
diff --git a/hashset/src/main.c b/hashset/src/main.c
index ed2fb88..7ae47bd 100644
--- a/hashset/src/main.c
+++ b/hashset/src/main.c
@@ -8,6 +8,7 @@
 #include <stdio.h>
 #include <time.h>
 #include <string.h>
+#include <errno.h>
 
 #ifndef _WIN32
 #  include <unistd.h>
diff --git a/libhashset/Makefile b/libhashset/Makefile
index 55f36d2..54c5083 100644
--- a/libhashset/Makefile
+++ b/libhashset/Makefile
@@ -6,7 +6,7 @@ else ifneq ($(firstword $(filter i686-%,$(DUMPMACHINE))),)
   XCFLAGS = -march=pentiumpro -mtune=intel
 endif
 
-CFLAGS = -O3 -DNDEBUG -Iinclude $(XCFLAGS)
+CFLAGS = -std=c99 -O3 -DNDEBUG -Wpedantic -Iinclude $(XCFLAGS)
 
 SRC_PATH := src
 OBJ_PATH := obj
diff --git a/libhashset/include/hash_set.h b/libhashset/include/hash_set.h
index e6cca4c..471fd01 100644
--- a/libhashset/include/hash_set.h
+++ b/libhashset/include/hash_set.h
@@ -3,8 +3,8 @@
 /* This work has been released under the CC0 1.0 Universal license!           */
 /******************************************************************************/
 
-#ifndef _INC_HASH_SET_H
-#define _INC_HASH_SET_H
+#ifndef _HASHSET_INCLUDED
+#define _HASHSET_INCLUDED
 
 #include <stdlib.h>
 #include <stdint.h>
@@ -13,6 +13,11 @@
 extern "C" {
 #endif
 
+#if !defined(_MSC_VER) && !defined(__MINGW32__) && !defined(_ERRNO_T_DEFINED)
+typedef int errno_t;
+#define _ERRNO_T_DEFINED 1
+#endif
+
 #define HASHSET_OPT_FAILFAST UINT16_C(0x1)
 
 struct _hash_set;
diff --git a/libhashset/src/hash_set.c b/libhashset/src/hash_set.c
index e44e76d..6ef34a5 100644
--- a/libhashset/src/hash_set.c
+++ b/libhashset/src/hash_set.c
@@ -8,6 +8,7 @@
 /* CRT */
 #include <string.h>
 #include <errno.h>
+#include <limits.h>
 #include <float.h>
 
 typedef int bool_t;