These macros for Autoconf test if latex and/or some others applications are installed

To use this macro, just do the following :

    add m4_include([latex.m4]) to the configure.in file

    use autoconf -I<path to folder of latex.m4>

or 
    aclocal -I <path to folder that contains these macro>
    autoconf
    
Then, you can use the following macro :

AC_LATEX_CLASS_ARTICLE
-> set $article to yes if class article exists

AC_LATEX_CLASS_BOOK
-> set $book to yes if class book exists

AC_LATEX_CLASS_REPORT
-> set $report to yes if class report exists

AC_LATEX_CLASS(<class>,<var>)
or
AC_LATEX_CLASS(<class>,<var>,<action if yes>)
or
AC_LATEX_CLASS(<class>,<var>,<action if yes>,<action if no>)
-> set $<var> to yes if <class> exists

AC_LATEX_CLASSES ([<class1, class2, ...>],<var>)
-> set $<var> to the first class that exists

AC_LATEX_PACKAGE_AMSMATH
-> set $amsmath to the right way to include amsmath

AC_LATEX_PACKAGE_FONTENC
-> set $fontenc to OT1 or T1

AC_LATEX_PACKAGE_INPUT(<package>,<class>,<var>)
-> set $<var> to yes if <package> can be \input within <class>

AC_LATEX_PACKAGE_OPT(<package>,<class>,<var>,<opt>)
-> set $<var> to yes if <package> with <opt> works within <class>

AC_LATEX_PACKAGE(<package>,<class>,<var>)
or
AC_LATEX_PACKAGE(<package>,<class>,<var>,<action if yes>)
or
AC_LATEX_PACKAGE(<package>,<class>,<var>,<action if yes>,<action if no>)
-> set $<var> to yes if <package> can be use within <class>

AC_LATEX_PACKAGES([<package1>,<package2>,...],<class>,<var>)
-> set $<var> to the first package that works with <class>

AC_PROG_DVIPDF
-> test if dvipdf exists and set $dvipdf

AC_PROG_DVIPS
-> test if dvips exists and set $dvips

AC_PROG_FIG2DEV
-> test if fig2dev exists and set $fig2dev

AC_PROG_GNUPLOT
-> test if gnuplot exists and set $gnuplot

AC_PROG_GUNZIP
-> test if gunzip exists and set $gunzip

AC_PROG_GZIP
-> test if gzip exists and set $gzip

AC_PROG_LATEX
-> test if latex exists and set $latex

AC_PROG_MF
-> test if mf exists and set $mf

AC_PROG_PDFLATEX
-> test if pdflatex exists and set $pdflatex

AC_PROG_PS2PDF
-> test if ps2pdf exists and set $ps2pdf

AC_PROG_BIBTEX
-> test if bibtex exists and set $bibtex

AC_PROG_LATEX2HTML
-> test if latex2html exists and set $latex2html

AC_PROG_LATEX2MAN
-> test if latex2man exists and set $latex2man

AC_PROG_MAKEINDEX
-> test if makeindex exists and set $makeindex

AC_PROG_JPEG2PS
-> test if jpeg2ps exists and set $jpeg2ps

AC_LATEX_DVIPS_T (<paper>,<var>,[on|off])
-> test if option -t <paper> in dvips works and set var to yes or no. if last parameter is on, use -t landscape and -t <paper>

AC_LATEX_DVIPS_T_A4 
-> test if option -t a4 in dvips works and set dvips_t_a4 to yes or no

AC_LATEX_DVIPS_T_LETTER
-> test if option -t letter in dvips works and set dvips_t_letter to yes or no

AC_LATEX_DVIPS_T_A4_LANDSCAPE
-> test if option -t a4 -t landscape in dvips works and set dvips_t_a4_landscape to yes or no

AC_LATEX_DVIPS_T_LETTER_LANDSCAPE
-> test if option -t letter -t landscape in dvips works and set dvips_t_letter_landscape to yes or no

AC_LATEX_DVIPS_O_STDOUT
-> test if option -t- in dvips works and set dvips_o_stdout to yes or no

AC_PROG_MKTEXPK
-> test if mktexpk exists and set $mktexpk

AC_PROG_TEXHASH
-> test if texhash exists and set $texhash

AC_PROG_KPSEWHICH
-> test if kpsewhich exists and set $kpsewhich

AC_TEXMF_PATH
-> test for a local texmf path where to install class and package

AC_PROG_PNGTOPNM
-> test if pngtopnm exists and set $pngtopnm

AC_PROG_PNMTOPS
-> test if pnmtops exists and set $pnmtops

AC_PROG_JPEGTOPNM
-> test if jpegtopnm exists and set $jpegtopnm

AC_PROG_LATEX2PNG
-> test if latex2png exists and set $latex2png

AC_PROG_LATEX2RTF
-> test if latex2rtf exists and set $latex2rtf

AC_PROG_PSBOOK
-> test if psbook exists and set $psbook

AC_PROG_PSNUP
-> test if psnup exists and set $psnup

AC_PROG_PSSELECT
-> test if psselect exists and set $psselect

AC_PROG_PSRESIZE
-> test if psresize exists and set $psresize

AC_PROG_DVIBOOK
-> test if dvibook exists and set $dvibook

History :
2004-08-14 : Version 1.3 of these macros
2004-07-24 : Changing .dvips folder to be destroy at end
2004-07-14 : Changing AC_LATEX_CLASS and AC_LATEX_PACKAGE to add feature
             to support if and else operation
             Adding AC_PROG_PNGTOPNM
             Adding AC_PROG_PNMTOPS
             Adding AC_PROG_JPEGTOPNM
             Adding AC_PROG_LATEX2PNG
             Adding AC_PROG_LATEX2RTF
             Adding AC_PROG_PSBOOK
             Adding AC_PROG_PSNUP
             Adding AC_PROG_PSSELECT
             Adding AC_PROG_PSRESIZE
             Adding AC_PROG_DVIBOOK
2004-06-18 : Adding AC_PROG_TEXHASH
             Adding AC_PROG_KPSEWHICH
             Adding AC_TEXMF_PATH
2004-04-21 : Adding AC_LATEX_DVIPS_T_LETTER
             Adding AC_LATEX_DVIPS_T_A4_LANDSCAPE
             Adding AC_LATEX_DVIPS_T_LETTER_LANDSCAPE
             Adding AC_LATEX_DVIPS_O_STDOUT
             Adding AC_PROG_MKTEXPK
             Bugs correction and adding some comments
2004-04-20 : Adding AC_PROG_BIBTEX
             Adding AC_PROG_LATEX2HTML
             Adding AC_PROG_LATEX2MAN
             Adding AC_PROG_MAKEINDEX
             Adding AC_PROG_JPEG2PS
             Adding AC_LATEX_DVIPS_T
             Adding AC_LATEX_DVIPS_T_A4
2004-04-19 : Version 1