AC_caolan_CHECK_PACKAGE(PACKAGE, FUNCTION, LIBRARY , HEADERFILE [, ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]])
, 

2003-10-29

Caolan McNamara <caolan@skynet.ie>

AllPermissive
Copying and distribution of this file, with or without modification, are permitted in any medium without royalty provided the copyright notice and this notice are preserved. Users of this software should generally follow the principles of the MIT License includings its disclaimer.

cryp.to ac-archive's Installed Packages (released)

Provides --with-PACKAGE, --with-PACKAGE-include and --with-PACKAGE-libdir options to configure. Supports the now standard --with-PACKAGE=DIR approach where the package's include dir and lib dir are underneath DIR, but also allows the include and lib directories to be specified seperately

adds the extra -Ipath to CFLAGS if needed adds extra -Lpath to LD_FLAGS if needed searches for the FUNCTION in the LIBRARY with AC_CHECK_LIBRARY and thus adds the lib to LIBS

defines HAVE_PKG_PACKAGE if it is found, (where PACKAGE in the HAVE_PKG_PACKAGE is replaced with the actual first parameter passed) note that autoheader will complain of not having the HAVE_PKG_PACKAGE and you will have to add it to acconfig.h manually

with fixes from... Alexandre Duret-Lutz <duret_g@lrde.epita.fr> Matthew Mueller <donut@azstarnet.com>

AC_DEFUN([AC_caolan_CHECK_PACKAGE],
[

AC_ARG_WITH($1,
[  --with-$1[=DIR]	root directory of $1 installation],
with_$1=$withval
if test "${with_$1}" != yes; then
	$1_include="$withval/include"
	$1_libdir="$withval/lib"
fi
)

AC_ARG_WITH($1-include,
[  --with-$1-include=DIR        specify exact include dir for $1 headers],
$1_include="$withval")

AC_ARG_WITH($1-libdir,
[  --with-$1-libdir=DIR        specify exact library dir for $1 library
  --without-$1        disables $1 usage completely],
$1_libdir="$withval")

if test "${with_$1}" != no ; then
	OLD_LIBS=$LIBS
	OLD_LDFLAGS=$LDFLAGS
	OLD_CFLAGS=$CFLAGS
	OLD_CPPFLAGS=$CPPFLAGS

	if test "${$1_libdir}" ; then
		LDFLAGS="$LDFLAGS -L${$1_libdir}"
	fi
	if test "${$1_include}" ; then
		CPPFLAGS="$CPPFLAGS -I${$1_include}"
		CFLAGS="$CFLAGS -I${$1_include}"
	fi

	no_good=no
	AC_CHECK_LIB($3,$2,,no_good=yes)
	AC_CHECK_HEADER($4,,no_good=yes)
	if test "$no_good" = yes; then
dnl	broken
		ifelse([$6], , , [$6])

		LIBS=$OLD_LIBS
		LDFLAGS=$OLD_LDFLAGS
		CPPFLAGS=$OLD_CPPFLAGS
		CFLAGS=$OLD_CFLAGS
	else
dnl	fixed
		ifelse([$5], , , [$5])

		AC_DEFINE(HAVE_PKG_$1)
	fi

fi

])