3 files changed, 834 insertions, 0 deletions
diff --git a/CSAPP/chap1/hello_compilation_steps/hello.c b/CSAPP/chap1/hello_compilation_steps/hello.c
new file mode 100644
index 0000000..2581101
--- /dev/null
+++ b/CSAPP/chap1/hello_compilation_steps/hello.c
@@ -0,0 +1,7 @@
+#include <stdio.h>
+
+int main(void)
+{
+	printf("Hello world\n");
+	return 0;
+}
diff --git a/CSAPP/chap1/hello_compilation_steps/hello_asm_phase2.s b/CSAPP/chap1/hello_compilation_steps/hello_asm_phase2.s
new file mode 100644
index 0000000..08014a3
--- /dev/null
+++ b/CSAPP/chap1/hello_compilation_steps/hello_asm_phase2.s
@@ -0,0 +1,26 @@
+	.file	"hello.c"
+	.section	.rodata
+.LC0:
+	.string	"Hello world"
+	.text
+	.globl	main
+	.type	main, @function
+main:
+.LFB0:
+	.cfi_startproc
+	pushq	%rbp
+	.cfi_def_cfa_offset 16
+	.cfi_offset 6, -16
+	movq	%rsp, %rbp
+	.cfi_def_cfa_register 6
+	movl	$.LC0, %edi
+	call	puts
+	movl	$0, %eax
+	popq	%rbp
+	.cfi_def_cfa 7, 8
+	ret
+	.cfi_endproc
+.LFE0:
+	.size	main, .-main
+	.ident	"GCC: (GNU) 7.2.1 20170915 (Red Hat 7.2.1-2)"
+	.section	.note.GNU-stack,"",@progbits
diff --git a/CSAPP/chap1/hello_compilation_steps/hello_post_preprocessor.i b/CSAPP/chap1/hello_compilation_steps/hello_post_preprocessor.i
new file mode 100644
index 0000000..38966c9
--- /dev/null
+++ b/CSAPP/chap1/hello_compilation_steps/hello_post_preprocessor.i
@@ -0,0 +1,801 @@
+# 1 "./hello.c"
+# 1 "<built-in>"
+# 1 "<command-line>"
+# 31 "<command-line>"
+# 1 "/usr/include/stdc-predef.h" 1 3 4
+# 32 "<command-line>" 2
+# 1 "./hello.c"
+# 1 "/usr/include/stdio.h" 1 3 4
+# 27 "/usr/include/stdio.h" 3 4
+# 1 "/usr/include/bits/libc-header-start.h" 1 3 4
+# 33 "/usr/include/bits/libc-header-start.h" 3 4
+# 1 "/usr/include/features.h" 1 3 4
+# 423 "/usr/include/features.h" 3 4
+# 1 "/usr/include/sys/cdefs.h" 1 3 4
+# 419 "/usr/include/sys/cdefs.h" 3 4
+# 1 "/usr/include/bits/wordsize.h" 1 3 4
+# 420 "/usr/include/sys/cdefs.h" 2 3 4
+# 1 "/usr/include/bits/long-double.h" 1 3 4
+# 421 "/usr/include/sys/cdefs.h" 2 3 4
+# 424 "/usr/include/features.h" 2 3 4
+# 447 "/usr/include/features.h" 3 4
+# 1 "/usr/include/gnu/stubs.h" 1 3 4
+# 10 "/usr/include/gnu/stubs.h" 3 4
+# 1 "/usr/include/gnu/stubs-64.h" 1 3 4
+# 11 "/usr/include/gnu/stubs.h" 2 3 4
+# 448 "/usr/include/features.h" 2 3 4
+# 34 "/usr/include/bits/libc-header-start.h" 2 3 4
+# 28 "/usr/include/stdio.h" 2 3 4
+
+
+
+
+
+# 1 "/usr/lib/gcc/x86_64-redhat-linux/7/include/stddef.h" 1 3 4
+# 216 "/usr/lib/gcc/x86_64-redhat-linux/7/include/stddef.h" 3 4
+
+# 216 "/usr/lib/gcc/x86_64-redhat-linux/7/include/stddef.h" 3 4
+typedef long unsigned int size_t;
+# 34 "/usr/include/stdio.h" 2 3 4
+
+# 1 "/usr/include/bits/types.h" 1 3 4
+# 27 "/usr/include/bits/types.h" 3 4
+# 1 "/usr/include/bits/wordsize.h" 1 3 4
+# 28 "/usr/include/bits/types.h" 2 3 4
+
+
+typedef unsigned char __u_char;
+typedef unsigned short int __u_short;
+typedef unsigned int __u_int;
+typedef unsigned long int __u_long;
+
+
+typedef signed char __int8_t;
+typedef unsigned char __uint8_t;
+typedef signed short int __int16_t;
+typedef unsigned short int __uint16_t;
+typedef signed int __int32_t;
+typedef unsigned int __uint32_t;
+
+typedef signed long int __int64_t;
+typedef unsigned long int __uint64_t;
+
+
+
+
+
+
+
+typedef long int __quad_t;
+typedef unsigned long int __u_quad_t;
+
+
+
+
+
+
+
+typedef long int __intmax_t;
+typedef unsigned long int __uintmax_t;
+# 130 "/usr/include/bits/types.h" 3 4
+# 1 "/usr/include/bits/typesizes.h" 1 3 4
+# 131 "/usr/include/bits/types.h" 2 3 4
+
+
+typedef unsigned long int __dev_t;
+typedef unsigned int __uid_t;
+typedef unsigned int __gid_t;
+typedef unsigned long int __ino_t;
+typedef unsigned long int __ino64_t;
+typedef unsigned int __mode_t;
+typedef unsigned long int __nlink_t;
+typedef long int __off_t;
+typedef long int __off64_t;
+typedef int __pid_t;
+typedef struct { int __val[2]; } __fsid_t;
+typedef long int __clock_t;
+typedef unsigned long int __rlim_t;
+typedef unsigned long int __rlim64_t;
+typedef unsigned int __id_t;
+typedef long int __time_t;
+typedef unsigned int __useconds_t;
+typedef long int __suseconds_t;
+
+typedef int __daddr_t;
+typedef int __key_t;
+
+
+typedef int __clockid_t;
+
+
+typedef void * __timer_t;
+
+
+typedef long int __blksize_t;
+
+
+
+
+typedef long int __blkcnt_t;
+typedef long int __blkcnt64_t;
+
+
+typedef unsigned long int __fsblkcnt_t;
+typedef unsigned long int __fsblkcnt64_t;
+
+
+typedef unsigned long int __fsfilcnt_t;
+typedef unsigned long int __fsfilcnt64_t;
+
+
+typedef long int __fsword_t;
+
+typedef long int __ssize_t;
+
+
+typedef long int __syscall_slong_t;
+
+typedef unsigned long int __syscall_ulong_t;
+
+
+
+typedef __off64_t __loff_t;
+typedef __quad_t *__qaddr_t;
+typedef char *__caddr_t;
+
+
+typedef long int __intptr_t;
+
+
+typedef unsigned int __socklen_t;
+
+
+
+
+typedef int __sig_atomic_t;
+# 36 "/usr/include/stdio.h" 2 3 4
+# 1 "/usr/include/bits/types/__FILE.h" 1 3 4
+
+
+
+struct _IO_FILE;
+typedef struct _IO_FILE __FILE;
+# 37 "/usr/include/stdio.h" 2 3 4
+# 1 "/usr/include/bits/types/FILE.h" 1 3 4
+
+
+
+struct _IO_FILE;
+
+
+typedef struct _IO_FILE FILE;
+# 38 "/usr/include/stdio.h" 2 3 4
+
+
+
+# 1 "/usr/include/libio.h" 1 3 4
+# 31 "/usr/include/libio.h" 3 4
+# 1 "/usr/include/_G_config.h" 1 3 4
+# 15 "/usr/include/_G_config.h" 3 4
+# 1 "/usr/lib/gcc/x86_64-redhat-linux/7/include/stddef.h" 1 3 4
+# 16 "/usr/include/_G_config.h" 2 3 4
+
+# 1 "/usr/include/bits/types/__mbstate_t.h" 1 3 4
+# 13 "/usr/include/bits/types/__mbstate_t.h" 3 4
+typedef struct
+{
+  int __count;
+  union
+  {
+    unsigned int __wch;
+    char __wchb[4];
+  } __value;
+} __mbstate_t;
+# 18 "/usr/include/_G_config.h" 2 3 4
+
+
+
+
+typedef struct
+{
+  __off_t __pos;
+  __mbstate_t __state;
+} _G_fpos_t;
+typedef struct
+{
+  __off64_t __pos;
+  __mbstate_t __state;
+} _G_fpos64_t;
+# 32 "/usr/include/libio.h" 2 3 4
+# 49 "/usr/include/libio.h" 3 4
+# 1 "/usr/lib/gcc/x86_64-redhat-linux/7/include/stdarg.h" 1 3 4
+# 40 "/usr/lib/gcc/x86_64-redhat-linux/7/include/stdarg.h" 3 4
+typedef __builtin_va_list __gnuc_va_list;
+# 50 "/usr/include/libio.h" 2 3 4
+# 145 "/usr/include/libio.h" 3 4
+struct _IO_jump_t; struct _IO_FILE;
+
+
+
+
+typedef void _IO_lock_t;
+
+
+
+
+
+struct _IO_marker {
+  struct _IO_marker *_next;
+  struct _IO_FILE *_sbuf;
+
+
+
+  int _pos;
+# 173 "/usr/include/libio.h" 3 4
+};
+
+
+enum __codecvt_result
+{
+  __codecvt_ok,
+  __codecvt_partial,
+  __codecvt_error,
+  __codecvt_noconv
+};
+# 241 "/usr/include/libio.h" 3 4
+struct _IO_FILE {
+  int _flags;
+
+
+
+
+  char* _IO_read_ptr;
+  char* _IO_read_end;
+  char* _IO_read_base;
+  char* _IO_write_base;
+  char* _IO_write_ptr;
+  char* _IO_write_end;
+  char* _IO_buf_base;
+  char* _IO_buf_end;
+
+  char *_IO_save_base;
+  char *_IO_backup_base;
+  char *_IO_save_end;
+
+  struct _IO_marker *_markers;
+
+  struct _IO_FILE *_chain;
+
+  int _fileno;
+
+
+
+  int _flags2;
+
+  __off_t _old_offset;
+
+
+
+  unsigned short _cur_column;
+  signed char _vtable_offset;
+  char _shortbuf[1];
+
+
+
+  _IO_lock_t *_lock;
+# 289 "/usr/include/libio.h" 3 4
+  __off64_t _offset;
+
+
+
+
+
+
+
+  void *__pad1;
+  void *__pad2;
+  void *__pad3;
+  void *__pad4;
+
+  size_t __pad5;
+  int _mode;
+
+  char _unused2[15 * sizeof (int) - 4 * sizeof (void *) - sizeof (size_t)];
+
+};
+
+
+typedef struct _IO_FILE _IO_FILE;
+
+
+struct _IO_FILE_plus;
+
+extern struct _IO_FILE_plus _IO_2_1_stdin_;
+extern struct _IO_FILE_plus _IO_2_1_stdout_;
+extern struct _IO_FILE_plus _IO_2_1_stderr_;
+# 333 "/usr/include/libio.h" 3 4
+typedef __ssize_t __io_read_fn (void *__cookie, char *__buf, size_t __nbytes);
+
+
+
+
+
+
+
+typedef __ssize_t __io_write_fn (void *__cookie, const char *__buf,
+     size_t __n);
+
+
+
+
+
+
+
+typedef int __io_seek_fn (void *__cookie, __off64_t *__pos, int __w);
+
+
+typedef int __io_close_fn (void *__cookie);
+# 385 "/usr/include/libio.h" 3 4
+extern int __underflow (_IO_FILE *);
+extern int __uflow (_IO_FILE *);
+extern int __overflow (_IO_FILE *, int);
+# 429 "/usr/include/libio.h" 3 4
+extern int _IO_getc (_IO_FILE *__fp);
+extern int _IO_putc (int __c, _IO_FILE *__fp);
+extern int _IO_feof (_IO_FILE *__fp) __attribute__ ((__nothrow__ , __leaf__));
+extern int _IO_ferror (_IO_FILE *__fp) __attribute__ ((__nothrow__ , __leaf__));
+
+extern int _IO_peekc_locked (_IO_FILE *__fp);
+
+
+
+
+
+extern void _IO_flockfile (_IO_FILE *) __attribute__ ((__nothrow__ , __leaf__));
+extern void _IO_funlockfile (_IO_FILE *) __attribute__ ((__nothrow__ , __leaf__));
+extern int _IO_ftrylockfile (_IO_FILE *) __attribute__ ((__nothrow__ , __leaf__));
+# 458 "/usr/include/libio.h" 3 4
+extern int _IO_vfscanf (_IO_FILE * __restrict, const char * __restrict,
+   __gnuc_va_list, int *__restrict);
+extern int _IO_vfprintf (_IO_FILE *__restrict, const char *__restrict,
+    __gnuc_va_list);
+extern __ssize_t _IO_padn (_IO_FILE *, int, __ssize_t);
+extern size_t _IO_sgetn (_IO_FILE *, void *, size_t);
+
+extern __off64_t _IO_seekoff (_IO_FILE *, __off64_t, int, int);
+extern __off64_t _IO_seekpos (_IO_FILE *, __off64_t, int);
+
+extern void _IO_free_backup_area (_IO_FILE *) __attribute__ ((__nothrow__ , __leaf__));
+# 42 "/usr/include/stdio.h" 2 3 4
+
+
+
+
+typedef __gnuc_va_list va_list;
+# 57 "/usr/include/stdio.h" 3 4
+typedef __off_t off_t;
+# 71 "/usr/include/stdio.h" 3 4
+typedef __ssize_t ssize_t;
+
+
+
+
+
+
+typedef _G_fpos_t fpos_t;
+# 131 "/usr/include/stdio.h" 3 4
+# 1 "/usr/include/bits/stdio_lim.h" 1 3 4
+# 132 "/usr/include/stdio.h" 2 3 4
+
+
+
+extern struct _IO_FILE *stdin;
+extern struct _IO_FILE *stdout;
+extern struct _IO_FILE *stderr;
+
+
+
+
+
+
+extern int remove (const char *__filename) __attribute__ ((__nothrow__ , __leaf__));
+
+extern int rename (const char *__old, const char *__new) __attribute__ ((__nothrow__ , __leaf__));
+
+
+
+extern int renameat (int __oldfd, const char *__old, int __newfd,
+       const char *__new) __attribute__ ((__nothrow__ , __leaf__));
+
+
+
+
+
+
+
+extern FILE *tmpfile (void) ;
+# 173 "/usr/include/stdio.h" 3 4
+extern char *tmpnam (char *__s) __attribute__ ((__nothrow__ , __leaf__)) ;
+
+
+
+
+extern char *tmpnam_r (char *__s) __attribute__ ((__nothrow__ , __leaf__)) ;
+# 190 "/usr/include/stdio.h" 3 4
+extern char *tempnam (const char *__dir, const char *__pfx)
+     __attribute__ ((__nothrow__ , __leaf__)) __attribute__ ((__malloc__)) ;
+
+
+
+
+
+
+
+extern int fclose (FILE *__stream);
+
+
+
+
+extern int fflush (FILE *__stream);
+# 213 "/usr/include/stdio.h" 3 4
+extern int fflush_unlocked (FILE *__stream);
+# 232 "/usr/include/stdio.h" 3 4
+extern FILE *fopen (const char *__restrict __filename,
+      const char *__restrict __modes) ;
+
+
+
+
+extern FILE *freopen (const char *__restrict __filename,
+        const char *__restrict __modes,
+        FILE *__restrict __stream) ;
+# 265 "/usr/include/stdio.h" 3 4
+extern FILE *fdopen (int __fd, const char *__modes) __attribute__ ((__nothrow__ , __leaf__)) ;
+# 278 "/usr/include/stdio.h" 3 4
+extern FILE *fmemopen (void *__s, size_t __len, const char *__modes)
+  __attribute__ ((__nothrow__ , __leaf__)) ;
+
+
+
+
+extern FILE *open_memstream (char **__bufloc, size_t *__sizeloc) __attribute__ ((__nothrow__ , __leaf__)) ;
+
+
+
+
+
+extern void setbuf (FILE *__restrict __stream, char *__restrict __buf) __attribute__ ((__nothrow__ , __leaf__));
+
+
+
+extern int setvbuf (FILE *__restrict __stream, char *__restrict __buf,
+      int __modes, size_t __n) __attribute__ ((__nothrow__ , __leaf__));
+
+
+
+
+extern void setbuffer (FILE *__restrict __stream, char *__restrict __buf,
+         size_t __size) __attribute__ ((__nothrow__ , __leaf__));
+
+
+extern void setlinebuf (FILE *__stream) __attribute__ ((__nothrow__ , __leaf__));
+
+
+
+
+
+
+
+extern int fprintf (FILE *__restrict __stream,
+      const char *__restrict __format, ...);
+
+
+
+
+extern int printf (const char *__restrict __format, ...);
+
+extern int sprintf (char *__restrict __s,
+      const char *__restrict __format, ...) __attribute__ ((__nothrow__));
+
+
+
+
+
+extern int vfprintf (FILE *__restrict __s, const char *__restrict __format,
+       __gnuc_va_list __arg);
+
+
+
+
+extern int vprintf (const char *__restrict __format, __gnuc_va_list __arg);
+
+extern int vsprintf (char *__restrict __s, const char *__restrict __format,
+       __gnuc_va_list __arg) __attribute__ ((__nothrow__));
+
+
+
+extern int snprintf (char *__restrict __s, size_t __maxlen,
+       const char *__restrict __format, ...)
+     __attribute__ ((__nothrow__)) __attribute__ ((__format__ (__printf__, 3, 4)));
+
+extern int vsnprintf (char *__restrict __s, size_t __maxlen,
+        const char *__restrict __format, __gnuc_va_list __arg)
+     __attribute__ ((__nothrow__)) __attribute__ ((__format__ (__printf__, 3, 0)));
+# 365 "/usr/include/stdio.h" 3 4
+extern int vdprintf (int __fd, const char *__restrict __fmt,
+       __gnuc_va_list __arg)
+     __attribute__ ((__format__ (__printf__, 2, 0)));
+extern int dprintf (int __fd, const char *__restrict __fmt, ...)
+     __attribute__ ((__format__ (__printf__, 2, 3)));
+
+
+
+
+
+
+
+extern int fscanf (FILE *__restrict __stream,
+     const char *__restrict __format, ...) ;
+
+
+
+
+extern int scanf (const char *__restrict __format, ...) ;
+
+extern int sscanf (const char *__restrict __s,
+     const char *__restrict __format, ...) __attribute__ ((__nothrow__ , __leaf__));
+# 395 "/usr/include/stdio.h" 3 4
+extern int fscanf (FILE *__restrict __stream, const char *__restrict __format, ...) __asm__ ("" "__isoc99_fscanf")
+
+                               ;
+extern int scanf (const char *__restrict __format, ...) __asm__ ("" "__isoc99_scanf")
+                              ;
+extern int sscanf (const char *__restrict __s, const char *__restrict __format, ...) __asm__ ("" "__isoc99_sscanf") __attribute__ ((__nothrow__ , __leaf__))
+
+                      ;
+# 420 "/usr/include/stdio.h" 3 4
+extern int vfscanf (FILE *__restrict __s, const char *__restrict __format,
+      __gnuc_va_list __arg)
+     __attribute__ ((__format__ (__scanf__, 2, 0))) ;
+
+
+
+
+
+extern int vscanf (const char *__restrict __format, __gnuc_va_list __arg)
+     __attribute__ ((__format__ (__scanf__, 1, 0))) ;
+
+
+extern int vsscanf (const char *__restrict __s,
+      const char *__restrict __format, __gnuc_va_list __arg)
+     __attribute__ ((__nothrow__ , __leaf__)) __attribute__ ((__format__ (__scanf__, 2, 0)));
+# 443 "/usr/include/stdio.h" 3 4
+extern int vfscanf (FILE *__restrict __s, const char *__restrict __format, __gnuc_va_list __arg) __asm__ ("" "__isoc99_vfscanf")
+
+
+
+     __attribute__ ((__format__ (__scanf__, 2, 0))) ;
+extern int vscanf (const char *__restrict __format, __gnuc_va_list __arg) __asm__ ("" "__isoc99_vscanf")
+
+     __attribute__ ((__format__ (__scanf__, 1, 0))) ;
+extern int vsscanf (const char *__restrict __s, const char *__restrict __format, __gnuc_va_list __arg) __asm__ ("" "__isoc99_vsscanf") __attribute__ ((__nothrow__ , __leaf__))
+
+
+
+     __attribute__ ((__format__ (__scanf__, 2, 0)));
+# 477 "/usr/include/stdio.h" 3 4
+extern int fgetc (FILE *__stream);
+extern int getc (FILE *__stream);
+
+
+
+
+
+extern int getchar (void);
+# 495 "/usr/include/stdio.h" 3 4
+extern int getc_unlocked (FILE *__stream);
+extern int getchar_unlocked (void);
+# 506 "/usr/include/stdio.h" 3 4
+extern int fgetc_unlocked (FILE *__stream);
+# 517 "/usr/include/stdio.h" 3 4
+extern int fputc (int __c, FILE *__stream);
+extern int putc (int __c, FILE *__stream);
+
+
+
+
+
+extern int putchar (int __c);
+# 537 "/usr/include/stdio.h" 3 4
+extern int fputc_unlocked (int __c, FILE *__stream);
+
+
+
+
+
+
+
+extern int putc_unlocked (int __c, FILE *__stream);
+extern int putchar_unlocked (int __c);
+
+
+
+
+
+
+extern int getw (FILE *__stream);
+
+
+extern int putw (int __w, FILE *__stream);
+
+
+
+
+
+
+
+extern char *fgets (char *__restrict __s, int __n, FILE *__restrict __stream)
+     ;
+# 603 "/usr/include/stdio.h" 3 4
+extern __ssize_t __getdelim (char **__restrict __lineptr,
+          size_t *__restrict __n, int __delimiter,
+          FILE *__restrict __stream) ;
+extern __ssize_t getdelim (char **__restrict __lineptr,
+        size_t *__restrict __n, int __delimiter,
+        FILE *__restrict __stream) ;
+
+
+
+
+
+
+
+extern __ssize_t getline (char **__restrict __lineptr,
+       size_t *__restrict __n,
+       FILE *__restrict __stream) ;
+
+
+
+
+
+
+
+extern int fputs (const char *__restrict __s, FILE *__restrict __stream);
+
+
+
+
+
+extern int puts (const char *__s);
+
+
+
+
+
+
+extern int ungetc (int __c, FILE *__stream);
+
+
+
+
+
+
+extern size_t fread (void *__restrict __ptr, size_t __size,
+       size_t __n, FILE *__restrict __stream) ;
+
+
+
+
+extern size_t fwrite (const void *__restrict __ptr, size_t __size,
+        size_t __n, FILE *__restrict __s);
+# 673 "/usr/include/stdio.h" 3 4
+extern size_t fread_unlocked (void *__restrict __ptr, size_t __size,
+         size_t __n, FILE *__restrict __stream) ;
+extern size_t fwrite_unlocked (const void *__restrict __ptr, size_t __size,
+          size_t __n, FILE *__restrict __stream);
+
+
+
+
+
+
+
+extern int fseek (FILE *__stream, long int __off, int __whence);
+
+
+
+
+extern long int ftell (FILE *__stream) ;
+
+
+
+
+extern void rewind (FILE *__stream);
+# 707 "/usr/include/stdio.h" 3 4
+extern int fseeko (FILE *__stream, __off_t __off, int __whence);
+
+
+
+
+extern __off_t ftello (FILE *__stream) ;
+# 731 "/usr/include/stdio.h" 3 4
+extern int fgetpos (FILE *__restrict __stream, fpos_t *__restrict __pos);
+
+
+
+
+extern int fsetpos (FILE *__stream, const fpos_t *__pos);
+# 757 "/usr/include/stdio.h" 3 4
+extern void clearerr (FILE *__stream) __attribute__ ((__nothrow__ , __leaf__));
+
+extern int feof (FILE *__stream) __attribute__ ((__nothrow__ , __leaf__)) ;
+
+extern int ferror (FILE *__stream) __attribute__ ((__nothrow__ , __leaf__)) ;
+
+
+
+extern void clearerr_unlocked (FILE *__stream) __attribute__ ((__nothrow__ , __leaf__));
+extern int feof_unlocked (FILE *__stream) __attribute__ ((__nothrow__ , __leaf__)) ;
+extern int ferror_unlocked (FILE *__stream) __attribute__ ((__nothrow__ , __leaf__)) ;
+
+
+
+
+
+
+
+extern void perror (const char *__s);
+
+
+
+
+
+# 1 "/usr/include/bits/sys_errlist.h" 1 3 4
+# 26 "/usr/include/bits/sys_errlist.h" 3 4
+extern int sys_nerr;
+extern const char *const sys_errlist[];
+# 782 "/usr/include/stdio.h" 2 3 4
+
+
+
+
+extern int fileno (FILE *__stream) __attribute__ ((__nothrow__ , __leaf__)) ;
+
+
+
+
+extern int fileno_unlocked (FILE *__stream) __attribute__ ((__nothrow__ , __leaf__)) ;
+# 800 "/usr/include/stdio.h" 3 4
+extern FILE *popen (const char *__command, const char *__modes) ;
+
+
+
+
+
+extern int pclose (FILE *__stream);
+
+
+
+
+
+extern char *ctermid (char *__s) __attribute__ ((__nothrow__ , __leaf__));
+# 840 "/usr/include/stdio.h" 3 4
+extern void flockfile (FILE *__stream) __attribute__ ((__nothrow__ , __leaf__));
+
+
+
+extern int ftrylockfile (FILE *__stream) __attribute__ ((__nothrow__ , __leaf__)) ;
+
+
+extern void funlockfile (FILE *__stream) __attribute__ ((__nothrow__ , __leaf__));
+# 868 "/usr/include/stdio.h" 3 4
+
+# 2 "./hello.c" 2
+
+
+# 3 "./hello.c"
+int main(void)
+{
+ printf("Hello world\n");
+ return 0;
+}