如何在bitcoin源码的configure.ac文件中加入AC_PROG_CXX？

Question

我在Mac 电脑上编译比特币源码，开发环境配置已经完成，

执行autogen.sh报错

localhost:bitcoin zsc$ ./autogen.sh

configure.ac:28: installing 'build-aux/install-sh'

configure.ac:28: installing 'build-aux/missing'

Makefile.am:8: error: Libtool library used but 'LIBTOOL' is undefined

Makefile.am:8:   The usual way to define 'LIBTOOL' is to add 'LT_INIT'

Makefile.am:8:   to 'configure.ac' and run 'aclocal' and 'autoconf' again.

Makefile.am:8:   If 'LT_INIT' is in 'configure.ac', make sure

Makefile.am:8:   its definition is in aclocal's search path.

Makefile.am: installing 'build-aux/depcomp'

/usr/local/Cellar/automake/1.16.1_1/share/automake-1.16/am/depend2.am: error: am__fastdepCXX does not appear in AM_CONDITIONAL

/usr/local/Cellar/automake/1.16.1_1/share/automake-1.16/am/depend2.am:   The usual way to define 'am__fastdepCXX' is to add 'AC_PROG_CXX'

/usr/local/Cellar/automake/1.16.1_1/share/automake-1.16/am/depend2.am:   to 'configure.ac' and run 'aclocal' and 'autoconf' again

/usr/local/Cellar/automake/1.16.1_1/share/automake-1.16/am/depend2.am: error: AMDEP does not appear in AM_CONDITIONAL

/usr/local/Cellar/automake/1.16.1_1/share/automake-1.16/am/depend2.am:   The usual way to define 'AMDEP' is to add one of the compiler tests

/usr/local/Cellar/automake/1.16.1_1/share/automake-1.16/am/depend2.am:     AC_PROG_CC, AC_PROG_CXX, AC_PROG_OBJC, AC_PROG_OBJCXX,

/usr/local/Cellar/automake/1.16.1_1/share/automake-1.16/am/depend2.am:     AM_PROG_AS, AM_PROG_GCJ, AM_PROG_UPC

/usr/local/Cellar/automake/1.16.1_1/share/automake-1.16/am/depend2.am:   to 'configure.ac' and run 'aclocal' and 'autoconf' again

Makefile.am: error: C++ source seen but 'CXX' is undefined

Makefile.am:   The usual way to define 'CXX' is to add 'AC_PROG_CXX'

Makefile.am:   to 'configure.ac' and run 'autoconf' again.

parallel-tests: installing 'build-aux/test-driver'

autoreconf: automake failed with exit status: 1

根据这些信息，解决办法是要在configure.ac文件中加入AC_PROG_CXX

应该怎么加