From 78efbb99afdf2af98111e16fbf8d4a96b4eb8d7c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Anders=20Doozer=20S=C3=B8ndergaard=20Jensen?= <asj@one.com>
Date: Thu, 12 Sep 2024 20:49:51 +0200
Subject: [PATCH] remove warnings and enable build on newer gcc

---
 src/Makefile   | 2 +-
 src/pdclinux.c | 3 ++-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/Makefile b/src/Makefile
index 5f1d48a..ca63aab 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -30,7 +30,7 @@ STATIC=
 #PROFILE=-pg
 PROFILE=
 
-COPTS=-c -Wall -Wextra -std=c11 -DOS_LINUX $(PROFILE) -flto
+COPTS=-c -Wall -Wextra -std=c11 -DOS_LINUX -D_XOPEN_SOURCE=700 $(PROFILE) -flto
 ifeq ($(OPSYS),macos)
 COPTS+=-Oz -I/usr/local/opt/readline/include
 else
diff --git a/src/pdclinux.c b/src/pdclinux.c
index 92feacf..d725cf9 100644
--- a/src/pdclinux.c
+++ b/src/pdclinux.c
@@ -24,6 +24,7 @@
 #include <sys/stat.h>
 #include <sys/types.h>
 #include <unistd.h>
+#include <stdlib.h>
 
 #include <readline/readline.h>
 #include <readline/history.h>
@@ -548,7 +549,7 @@ PUBLIC void sys_sys_exp(struct exp_list *exproot, void **result, enum
                                   "SYS(sbrk) takes no further parameters");
 
                 *result = cell_alloc(INT_CPOOL);
-		**( (long **) result )=(long)sbrk(0);
+		**( (long **) result )=(long)malloc(0);
                 *type = V_INT;
 	} else if (strcmp(cmd, "now") == 0) {
                 if (exproot->next)