From 0960df714d626b7963f7544cc2df5aa1a6863d5b Mon Sep 17 00:00:00 2001
From: Thomas Oltmann <thomas.oltmann.hhg@gmail.com>
Date: Sat, 15 Mar 2025 23:33:20 +0100
Subject: [PATCH] Compiling lua without a C standard library

---
 libc/include/string.h | 14 ++++++++++++++
 lua/src/Makefile      |  7 ++++---
 2 files changed, 18 insertions(+), 3 deletions(-)
 create mode 100644 libc/include/string.h

diff --git a/libc/include/string.h b/libc/include/string.h
new file mode 100644
index 0000000..a39ab0e
--- /dev/null
+++ b/libc/include/string.h
@@ -0,0 +1,14 @@
+#pragma once
+
+#include <stddef.h>
+
+char *strchr(const char *s, int c);
+int strcmp(const char *s1, const char *s2);
+char *strcpy(char *restrict d, const char *restrict s);
+size_t strlen(const char *s);
+size_t strspn(const char *s, const char *a);
+char *strpbrk(const char *s, const char *a);
+int strcoll(const char *s1, const char *s2);
+
+void *memcpy(void *restrict dest, const void *restrict src, size_t n);
+int memcmp(const void *s1, const void *s2, size_t n);
diff --git a/lua/src/Makefile b/lua/src/Makefile
index 7a09f27..43dfdc1 100644
--- a/lua/src/Makefile
+++ b/lua/src/Makefile
@@ -6,8 +6,9 @@
 # Your platform. See PLATS for possible values.
 PLAT= generic
 
-CC= gcc -std=gnu99
-CFLAGS= -O2 -Wall -Wextra $(SYSCFLAGS) $(MYCFLAGS)
+CROSS_PATH = /home/thomas/karlos/gcc-14.2.0-nolibc/x86_64-linux/bin
+CC = $(CROSS_PATH)/x86_64-linux-gcc
+CFLAGS= -std=gnu99 -O2 -Wall -Wextra $(SYSCFLAGS) $(MYCFLAGS)
 LDFLAGS= $(SYSLDFLAGS) $(MYLDFLAGS)
 LIBS= -lm $(SYSLIBS) $(MYLIBS)
 
@@ -16,7 +17,7 @@ RANLIB= ranlib
 RM= rm -f
 UNAME= uname
 
-SYSCFLAGS=
+SYSCFLAGS=-nostdlib -ffreestanding -fpic -fno-stack-protector -fno-stack-check -fshort-wchar -mno-red-zone -maccumulate-outgoing-args -I ../../libc/include
 SYSLDFLAGS=
 SYSLIBS=