newlib: esp: add dirent.h header file

Support dirent in *-esp-* toolchains

newlib/Makefile.am

@@ -312,10 +312,10 @@ install-data-local: install-toollibLIBRARIES install-multi $(INSTALL_DATA_LOCAL)
 	     $(INSTALL_DATA) $$i $(DESTDIR)$(tooldir)/include/sys/`basename $$i`; \
 	    else true; fi ; \
 	  done ; \
-	  for i in $(srcdir)/libc/machine/$(machine_dir)/include/*.h; do \
-	    if [ -f $$i ]; then \
-	     $(INSTALL_DATA) $$i $(DESTDIR)$(tooldir)/include/`basename $$i`; \
-	    else true; fi ; \
+	  for i in $(call rwildcard,$(srcdir)/libc/machine/$(machine_dir)/include/,*.h); do \
+	    f=`echo $$i | sed s:^$(srcdir)/libc/machine/$(machine_dir)/::`; \
+	    $(MKDIR_P) $(DESTDIR)$(tooldir)/`dirname $$f`; \
+	    $(INSTALL_DATA) $$i $(DESTDIR)$(tooldir)/`dirname $$f`; \
 	  done ; \
 	  for i in $(srcdir)/libc/sys/$(sys_dir)/sys/*.h; do \
 	    if [ -f $$i ]; then \

newlib/configure

@@ -6263,7 +6263,7 @@ else
 /* end confdefs.h.  */
 #define _LIBM
 // targ-include does not exist yet, use relative path
-#include "../sys/xtensa/include/xtensa/config/core-isa.h"
+#include "../machine/xtensa/include/xtensa/config/core-isa.h"
 #if (!XCHAL_HAVE_FP_SQRT)
 # error "Have not XCHAL_HAVE_FP_SQRT"
 #endif

newlib/configure.host

@@ -446,6 +446,15 @@ case "${host}" in
 	sys_dir=tirtos
 	have_crt0="no"
 	;;
+  *-esp-*)
+	sys_dir=esp
+    have_crt0="no"
+	posix_dir=posix
+	newlib_cflags="${newlib_cflags} -D_NO_GLOB -D_NO_EXECVE -D_NO_GETLOGIN -D_NO_GETPWENT -D_NO_GETUT"
+	newlib_cflags="${newlib_cflags} -D_NO_GETPASS -D_NO_SIGSET -D_NO_WORDEXP -D_NO_POPEN -D_NO_POSIX_SPAWN"
+	newlib_cflags="${newlib_cflags} -DHAVE_FCNTL -DHAVE_BLKSIZE -DHAVE_OPENDIR -DHAVE_RENAME"
+	newlib_cflags="${newlib_cflags} -DGETREENT_PROVIDED -DSIGNAL_PROVIDED"
+	;;
   a29k-*-*)
 	sys_dir=a29khif
 	signal_dir=
@@ -579,9 +588,6 @@ case "${host}" in
   w65-*-*)
 	sys_dir=w65
 	;;
-  xtensa*-*-*)
-	sys_dir=xtensa
-	;;
   z8k-*-coff)
 	sys_dir=z8ksim
 	;;

newlib/libc/sys/esp/include/sys/dirent.h

@@ -0,0 +1,49 @@
+#ifndef _SYS_DIRENT_H
+#define _SYS_DIRENT_H
+
+#include <sys/cdefs.h>
+#include <sys/_types.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#ifndef _INO_T_DECLARED
+typedef	__ino_t ino_t;
+#define	_INO_T_DECLARED
+#endif
+
+struct dirent {
+    ino_t d_ino;            /* file number */
+    __uint8_t d_type;       /* file type, see below */
+    char d_name[255 + 1];   /* zero-terminated file name */
+};
+
+typedef struct {
+    __uint16_t dd_vfs_idx; /*!< VFS index, not to be used by applications */
+    __uint16_t dd_rsv;     /*!< field reserved for future extension */
+    /* remaining fields are defined by VFS implementation */
+} DIR;
+
+#if __BSD_VISIBLE
+#define MAXNAMLEN	 255
+
+/* File types */
+#define	DT_UNKNOWN	 0
+#define	DT_REG		 1
+#define	DT_DIR		 2
+
+/* File types which are not defined for ESP.
+ * But must be present to build libstd++ */
+#define	DT_CHR		 4
+#define	DT_BLK		 6
+#define	DT_FIFO		 8
+#define	DT_LNK		10
+#define	DT_SOCK		12
+#define	DT_WHT		14
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+#endif