I had a similar problem but figured it out. My reason for tessarct and 
hence leptonica was to compile pdfocr (https://github.com/gkovacs/pdfocr). 

Downloaded source for Leptonica 1.69. Untared and since I don't have root 
permissions ran in leptonica directory.
$ ./configure --prefix=/home/albert/usr/  && make && make install;

This succesfully put the leptonica bin,lib, and include dirs in my ~/usr 
folder.

I have the bin directory in the PATH, the lib directory in the 
LD_LIBRARY_PATH, and the include directory in C_INCLUDE_PATH however this 
is not enough, nor neccessary, to configure tessaract.

In fact, tessaract has flags for finding leptonica. Here is what I used in 
tcsh:
$ ( setenv LIBLEPT_HEADERSDIR /home/albert/usr/include/leptonica ; setenv 
LDFLAGS -L/home/albert/usr/lib ; ./configure --prefix=/home/albert/usr )

The brackets set up a subshell in which I temporarily set the leptonica 
header dir, and location of library, before calling configure. After just 
run 
$ make && make install

And it should work. Now I will continue compiling pdfocr and see if there 
are more requirments ;)

Cheers,
Josh


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