Libtool library used but `LIBTOOL' is undefined?

Question

Im trying to install ffmpeg on my server. Im unsing centos 5.

When I try to install libfdk_aac I get the following error

` autoreconf: Entering directory `.'
autoreconf: configure.ac: not using Gettext
autoreconf: running: aclocal --force -I m4
autoreconf: configure.ac: tracing
autoreconf: configure.ac: not using Libtool
autoreconf: running: /usr/bin/autoconf --force
autoreconf: configure.ac: not using Autoheader
autoreconf: running: automake --add-missing --copy --force-missing
Makefile.am:31: Libtool library used but `LIBTOOL' is undefined
Makefile.am:31:
Makefile.am:31: The usual way to define `LIBTOOL' is to add `AC_PROG_LIBTOOL'
Makefile.am:31: to `configure.ac' and run `aclocal' and `autoconf' again.
Makefile.am: C objects in subdir but `AM_PROG_CC_C_O' not in `configure.ac'
autoreconf: automake failed with exit status: 1 ` 

If i type which libtool I get /usr/bin/libtool, so i think libtool is installed. So im not sure why this error is happening.

Thanks for any advice

Answer 1

The error is telling you that either libtool is not installed, or that you are not checking for it in configure.ac. Add the line LT_INIT in configure.ac. If autoreconf then complains that it doesn't know what LT_INIT is, you should either install libtool, upgrade your installation of libtool or use the deprecated AC_PROG_LIBTOOL in configure.ac. (AC_PROG_LIBTOOL should be replaced by LT_INIT in newer projects.)

Answer 2

I had the same issue. Did the following

$brew install libtool
==> Downloading https://downloads.sf.net/project/machomebrew/Bottles/libtool-    2.4.2.mavericks.bottle.2.tar.gz
######################################################################## 100.0%
==> Pouring libtool-2.4.2.mavericks.bottle.2.tar.gz
==> Caveats
In order to prevent conflicts with Apple's own libtool we have prepended a "g"
so, you have instead: glibtool and glibtoolize.
==> Summary
🍺  /usr/local/Cellar/libtool/2.4.2: 66 files, 2.2M
fdk-aac $ glibtoolize
fdk-aac $ autoreconf -fiv
fdk-aac $ ./configure
fdk-aac $ make
fdk-aac $ make -install
go to ffmpeg/build
ffmpeg/build$ ../configure --enable-libfdk-aac --enable-nonfree
ffmpeg/build$make
ffmpeg/build$sudo make install
do ls /usr/local/lib/*fdk* check that libfdk-aac is installed
go to my application

 myapp/build$cmake ../
 myapp/build$make

Hope this helps