编译opus lib失败 error AM_PROG_LIBTO

从官网下载了最新的opus 1.3的代码，然后按照readme说明进行编译。

配置的时候出现如下错误：

$ ./autogen.sh

Updating build configuration files, please wait....

configure.ac:38: warning: macro 'AM_PROG_LIBTOOL' not found in library

configure.ac:38: error: possibly undefined macro: AM_PROG_LIBTOOL

      If this token and others are legitimate, please use m4_pattern_allow.

      See the Autoconf documentation.

autoreconf: /usr/bin/autoconf failed with exit status: 1

搜索了一下，缺少libtool，安装解决

$ sudo apt-get install libtool

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接着来了第二个错误：

$ ./autogen.sh

Updating build configuration files, please wait....

libtoolize: putting auxiliary files in '.'.

libtoolize:  error: linking '/usr/share/libtool/build-aux/ltmain.sh' to './' failed

libtoolize: putting macros in AC_CONFIG_MACRO_DIRS, 'm4'.

libtoolize:  error: linking '/usr/share/aclocal/libtool.m4' to 'm4/' failed

libtoolize:  error: linking '/usr/share/aclocal/ltoptions.m4' to 'm4/' failed

libtoolize:  error: linking '/usr/share/aclocal/ltsugar.m4' to 'm4/' failed

libtoolize:  error: linking '/usr/share/aclocal/ltversion.m4' to 'm4/' failed

libtoolize:  error: linking '/usr/share/aclocal/lt~obsolete.m4' to 'm4/' failed

autoreconf: libtoolize failed with exit status: 1

原因是opus编译代码在我的共享文件夹下面，造成了权限问题。对我用的虚拟机VBox。

重新克隆一份opus代码到/usr/home下，再次执行autogen.sh，成功。

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there's actually another situation that can cause the libtoolize that was not really addressed here. Permission and access issues. Consider the following situation: you're in virtualbox and trying to run libtoolize out of a VBox Shared folder, you will get this error. Move the project within the machine, error is gone.

ref: https://stackoverflow.com/questions/31939729/regenerate-makefiles-sh-generates-libtoolize-linking-error-when-compiling-irstlm