cleanup newlib a little

os3-toolchain/build.sh

@@ -35,9 +35,10 @@ make install-target-libgcc
 
 cd ../../
 cd newlib
+rm -rf build
 mkdir build
 cd build
-../newlib-4.4.0.20231231/configure --prefix=/usr --target=$TARGET
+../newlib-4.4.0.20231231/configure --enable-newlib-supplied-syscalls --prefix=/usr --target=$TARGET
 make -j$(nproc) all
 make DESTDIR="$OS2_ROOT/sysroot" install
 cp -r "$OS2_ROOT/sysroot/usr"/x86_64-os3/* "$OS2_ROOT/sysroot/usr"

os3-toolchain/gcc-x86_64-os3/gcc-13.2.0/gcc/config/os3.h

@@ -5,7 +5,7 @@
 /* Default arguments you want when running your
    i686-os3-gcc/x86_64-os3-gcc toolchain */
 #undef LIB_SPEC
-#define LIB_SPEC "-lc -lg -lm -lnosys" /* link against C standard library */
+#define LIB_SPEC "-lc -lg -lm" /* link against C standard library */
  
 /* Files that are linked before user code.
    The %s tells GCC to look for these files in the library directory. */
@@ -25,4 +25,4 @@
     builtin_assert ("system=myos");   \
     builtin_assert ("system=unix");   \
     builtin_assert ("system=posix");   \
-  } while(0);
+  } while(0);

os3-toolchain/newlib/newlib-4.4.0.20231231/config.sub

@@ -1725,7 +1725,7 @@ case $os in
 	     | skyos* | haiku* | rdos* | toppers* | drops* | es* \
 	     | onefs* | tirtos* | phoenix* | fuchsia* | redox* | bme* \
 	     | midnightbsd* | amdhsa* | unleashed* | emscripten* | wasi* \
-	     | nsk* | powerunix* | genode* | zvmoe* | qnx* | emx*)
+	     | nsk* | powerunix* | genode* | zvmoe* | qnx* | emx* | os3*)
 		;;
 	# This one is extra strict with allowed versions
 	sco3.2v2 | sco3.2v[4-9]* | sco5v6*)

os3-toolchain/newlib/newlib-4.4.0.20231231/libgloss/configure

@@ -2972,6 +2972,9 @@ case "${target}" in
 	config_testsuite=false
 	config_libnosys=false
 	;;
+  *-*-os3*)
+	config_libnosys=false
+	;;
   tic6x-*-*)
 	ac_config_files="$ac_config_files tic6x/Makefile"
 

os3-toolchain/newlib/newlib-4.4.0.20231231/libgloss/configure.ac

@@ -225,6 +225,9 @@ case "${target}" in
 	config_testsuite=false
 	config_libnosys=false
 	;;
+  *-*-os3*)
+	config_libnosys=false
+	;;
   tic6x-*-*)
 	AC_CONFIG_FILES([tic6x/Makefile])
 	subdirs="$subdirs tic6x"

os3-toolchain/newlib/newlib-4.4.0.20231231/newlib/configure

@@ -779,6 +779,8 @@ HAVE_LIBC_SYS_XTENSA_DIR_FALSE
 HAVE_LIBC_SYS_XTENSA_DIR_TRUE
 HAVE_LIBC_SYS_W65_DIR_FALSE
 HAVE_LIBC_SYS_W65_DIR_TRUE
+HAVE_LIBC_SYS_OS3_DIR_FALSE
+HAVE_LIBC_SYS_OS3_DIR_TRUE
 HAVE_LIBC_SYS_TIRTOS_DIR_FALSE
 HAVE_LIBC_SYS_TIRTOS_DIR_TRUE
 HAVE_LIBC_SYS_TIC80_DIR_FALSE
@@ -5511,6 +5513,13 @@ fi
 else
   HAVE_LIBC_SYS_W65_DIR_TRUE='#'
   HAVE_LIBC_SYS_W65_DIR_FALSE=
+fi
+ if test "${sys_dir}" = os3; then
+  HAVE_LIBC_SYS_OS3_DIR_TRUE=
+  HAVE_LIBC_SYS_OS3_DIR_FALSE='#'
+else
+  HAVE_LIBC_SYS_OS3_DIR_TRUE='#'
+  HAVE_LIBC_SYS_OS3_DIR_FALSE=
 fi
  if test "${sys_dir}" = xtensa; then
   HAVE_LIBC_SYS_XTENSA_DIR_TRUE=
@@ -7699,6 +7708,10 @@ if test -z "${HAVE_LIBC_SYS_W65_DIR_TRUE}" && test -z "${HAVE_LIBC_SYS_W65_DIR_F
   as_fn_error $? "conditional \"HAVE_LIBC_SYS_W65_DIR\" was never defined.
 Usually this means the macro was only invoked conditionally." "$LINENO" 5
 fi
+if test -z "${HAVE_LIBC_SYS_OS3_DIR_TRUE}" && test -z "${HAVE_LIBC_SYS_OS3_DIR_FALSE}"; then
+  as_fn_error $? "conditional \"HAVE_LIBC_SYS_OS#_DIR\" was never defined.
+Usually this means the macro was only invoked conditionally." "$LINENO" 5
+fi
 if test -z "${HAVE_LIBC_SYS_XTENSA_DIR_TRUE}" && test -z "${HAVE_LIBC_SYS_XTENSA_DIR_FALSE}"; then
   as_fn_error $? "conditional \"HAVE_LIBC_SYS_XTENSA_DIR\" was never defined.
 Usually this means the macro was only invoked conditionally." "$LINENO" 5

os3-toolchain/newlib/newlib-4.4.0.20231231/newlib/configure.host

@@ -426,6 +426,9 @@ fi
 # THIS TABLE IS ALPHA SORTED.  KEEP IT THAT WAY.
 
 case "${host}" in
+  *-*-os3*)
+    sys_dir=os3
+    ;;
   *-*-cygwin*)
 	posix_dir=posix
 	xdr_dir=xdr

os3-toolchain/newlib/newlib-4.4.0.20231231/newlib/libc/acinclude.m4

@@ -25,6 +25,7 @@ m4_foreach_w([SYS_DIR], [
   w65
   xtensa
   z8ksim
+  os3
 ], [AM_CONDITIONAL([HAVE_LIBC_SYS_]m4_toupper(SYS_DIR)[_DIR], test "${sys_dir}" = SYS_DIR)])
 
 AC_TYPE_LONG_DOUBLE

os3-toolchain/newlib/newlib-4.4.0.20231231/newlib/libc/sys/Makefile.inc

@@ -70,3 +70,6 @@ endif
 if HAVE_LIBC_SYS_Z8KSIM_DIR
 include %D%/z8ksim/Makefile.inc
 endif
+if HAVE_LIBC_SYS_OS3_DIR
+include %D%/os3/Makefile.inc
+endif

os3-toolchain/newlib/newlib-4.4.0.20231231/newlib/libc/sys/os3/Makefile.inc

@@ -0,0 +1 @@
+libc_a_SOURCES += %D%/crt0.c %D%/syscalls.c

os3-toolchain/newlib/newlib-4.4.0.20231231/newlib/libc/sys/os3/crt0.c

@@ -0,0 +1,9 @@
+#include <fcntl.h>
+ 
+extern void exit(int code);
+extern int main ();
+ 
+void _start() {
+    int ex = main();
+    exit(ex);
+}

os3-toolchain/newlib/newlib-4.4.0.20231231/newlib/libc/sys/os3/syscalls.c

@@ -0,0 +1,29 @@
+/* note these headers are all provided by newlib - you don't need to provide them */
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <sys/fcntl.h>
+#include <sys/times.h>
+#include <sys/errno.h>
+#include <sys/time.h>
+#include <stdio.h>
+ 
+void _exit(){}
+int close(int file){}
+char **environ; /* pointer to array of char * strings that define the current environment variables */
+int execve(char *name, char **argv, char **env){}
+int fork(){}
+int fstat(int file, struct stat *st){}
+int getpid(){}
+int isatty(int file){}
+int kill(int pid, int sig){}
+int link(char *old, char *new){}
+int lseek(int file, int ptr, int dir){}
+int open(const char *name, int flags, ...){}
+int read(int file, char *ptr, int len){}
+caddr_t sbrk(int incr){}
+int stat(const char *file, struct stat *st){}
+clock_t times(struct tms *buf){}
+int unlink(char *name){}
+int wait(int *status){}
+int write(int file, char *ptr, int len){}
+int gettimeofday(struct timeval * restrict p, void * restrict z){}