修改ecb 2.4对于cedet 1.0的依赖

从ecb官网下载http://sourceforge.net/projects/ecb/下载2.4版本，make后报错ECB can only be used with [1.0pre6, 1.0.9]! Please install it and restart Emacs!

因为ecb2.4依赖于cedet1.0，并且做了版本检测。尝试着修改ecb-upgrade.el 文件，将ecb-check-requirements函数中的：

      ;; check if vedet-version is correct
 when (or (not (boundp 'cedet-version))
         (ecb-package-version-list<
         (ecb-package-version-str2list cedet-version)
          ecb-required-cedet-version-min)
         (ecb-package-version-list<
          ecb-required-cedet-version-max
          (ecb-package-version-str2list cedet-version)))
 (setq version-error (concat "cedet ["
                            cedet-required-version-str-min
                            ", "
                            cedet-required-version-str-max
                           "]")))

注释掉，重新make一下。将elc文件拷贝到ecb的目录。运行emacs24执行ecb-activate成功。这样emacs下开发的两个神器有可以正常使用了。

如果运行仍旧失败，并提示

Symbol's value as variable is void: stack-trace-on-error

在你的emacs配置中加上(setq stack-trace-on-error t)