openwrt 编译坑

P1 Can’t use ‘defined(@array)’

Linux kernel 无法编译通过，报了如下错误：

Can't use 'defined(@array)' (Maybe you should just omit the defined()?) at kernel/timeconst.pl line 373.

kernel/timeconst.pl 中的代码：

372     @val = @{$canned_values{$hz}};                                                                  
373     if (!defined(@val)) {                                                                                    
374         @val = compute_values($hz);                                                                 
375     }                                                                                               
376     output($hz, @val);

将if (!defined(@val))改为if (!@val)，再次编译就 OK。

原因：perl版本升级到 v5.22.1，发现官网因为一个bug，将defined(@array)去掉了。可以直接使用数组判断非空。

来自：http://blog.5ibc.net/p/48570.html

P2 /bin/automake.tmp line 3938.

Unescaped left brace in regex is illegal here in regex; marked by <-- HERE in m/\${ <-- HERE ([^ \t=:+{}]+)}/ at ./bin/automake.tmp line 3938.

增加patch
tools/automake/patches/210-fix-bug-because-of-high-perl-version.patch

diff --git a/bin/automake.in b/bin/automake.in
index 0ee37149dd..8ce621d1af 100644
--- a/bin/automake.in
+++ b/automake.in
@@ -3880,7 +3880,8 @@ sub substitute_ac_subst_variables_worker
 sub substitute_ac_subst_variables
 {
   my ($text) = @_;
-  $text =~ s/\${([^ \t=:+{}]+)}/substitute_ac_subst_variables_worker ($1)/ge;
+#  $text =~ s/\${([^ \t=:+{}]+)}/substitute_ac_subst_variables_worker ($1)/ge;
+  $text =~ s/\$[{]([^ \t=:+{}]+)}/substitute_ac_subst_variables_worker ($1)/ge;
   return $text;
 }

编译Openwrt源码，提示git依赖错误，意思是需要安装1.6.5以上版本的git，而系统中已安装2.17.1版本的git。

Build dependency: Please install Git (git-core) >= 1.6.5

/home/gooday/openwrt/include/prereq.mk:12: recipe for target 'prereq' failed

Prerequisite check failed. Use FORCE=1 to override.

/home/gooday/openwrt/include/toplevel.mk:140: recipe for target 'staging_dir/host/.prereq-build' failed

make: *** [staging_dir/host/.prereq-build] Error 1

解决方法：

方法一：

找到文件 openwrt/include/prereq-build.mk 的第148行，修改 git clone 2>&1 | grep -- --recursive 为 git verison

感谢网友【逸云飞扬】https://bbs.csdn.net/topics/392261336

方法二：

下载patch文件：https://gitlab.labs.nic.cz/turris/openwrt/uploads/0673001b14ab1d1769604ff0ce7d8781/git-version-check-fix.patch
将文件复制到/home/gooday/openwrt/include路径下
在当前路径下执行命令patch < git-version-check-fix.patch

出错信息：error: dereferencing pointer to incomplete type 'RSA {aka struct rsa_st}'

原因：由于默认使用了openssl 1.1.x 版本，导致的API不一致引起

解决：

1，直接安装openssl1.0版本，Debian 系：apt-get install libssl1.0-dev
————————————————
版权声明：本文为CSDN博主「princeofdream」的原创文章，遵循 CC 4.0 BY-SA 版权协议，转载请附上原文出处链接及本声明。
原文链接：https://blog.csdn.net/princeofdream/article/details/74546431

编译ncurses错误处理及解决办法

编译ncurses是编译linux内核时用到的一个工具，在make时遇到了如下错误：

In file included from ../ncurses/curses.priv.h:283:0,
                 from ../ncurses/lib_gen.c:19:
_46863.c:835:15: error: expected ‘)’ before ‘int’
../include/curses.h:1594:56: note: in definition of macro ‘mouse_trafo’
 #define mouse_trafo(y,x,to_screen) wmouse_trafo(stdscr,y,x,to_screen)
                                                        ^
Makefile:790: recipe for target '../objects/lib_gen.o' failed
make[1]: *** [../objects/lib_gen.o] Error 1
make[1]: Leaving directory '/home/ran/workspace/ncurses-5.9/ncurses'
Makefile:109: recipe for target 'all' failed
make: *** [all] Error 2

根据出错提示，找到ncurses目录下，include文件夹里的curses.h文件，查找mouse_trafo，锁定在1584行

1583 extern NCURSES_EXPORT(bool)    wmouse_trafo (const WINDOW*, int*, int*, bool);
1584 extern NCURSES_EXPORT(bool)    mouse_trafo (int*, int*, bool);              /* generated */

应该是由后面的一行注释引起的，具体原因不详
由于代码的部分是由另一个文件curses.tail
导入的，所以要修改curses.tail，

sudo vim curses.tail

查找mouse_trafo，定位到104行，去除104行后面的注释

103 extern NCURSES_EXPORT(bool)    wmouse_trafo (const WINDOW*, int*, int*, bool);
104 extern NCURSES_EXPORT(bool)    mouse_trafo (int*, int*, bool);              /* generated */

————————————————
版权声明：本文为CSDN博主「空灵花」的原创文章，遵循 CC 4.0 BY-SA 版权协议，转载请附上原文出处链接及本声明。
原文链接：https://blog.csdn.net/praying2/article/details/52143557

编译类openwrt sdk时，出现个gdate.c的错误，与编译器版本有关，打个patch就好

gdate.c: In function 'g_date_strftime':
gdate.c:2497:7: error: format not a string literal, format string not checked [-Werror=format-nonliteral]
      tmplen = strftime (tmpbuf, tmpbufsize, locale_format, &tm);
      ^~~~~~
cc1: some warnings being treated as errors
make[10]: *** [Makefile:1386: libglib_2_0_la-gdate.lo] Error 1
make[10]: Leaving directory '/opt/water/tina-sdk/out/mandolin-perf1/compile_dir/host/pkg-config-0.29/glib/glib'

解决：

单独改源码方式不好，下次重新编译有可能又要重新改，所以新建个patch一劳永逸

在tools/pkg-config/patches/目录下创建新文件001-glib-gdate-suppress-string-format-literal-warning.patch

内容如下：


--- a/glib/glib/gdate.c
+++ b/glib/glib/gdate.c
@@ -2439,6 +2439,9 @@ win32_strftime_helper (const GDate     *d,
  *
  * Returns: number of characters written to the buffer, or 0 the buffer was too small
  */
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wformat-nonliteral"
+
 gsize     
 g_date_strftime (gchar       *s, 
                  gsize        slen, 
@@ -2549,3 +2552,5 @@ g_date_strftime (gchar       *s,
   return retval;
 #endif
 }
+
+#pragma GCC diagnostic pop