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dnl Copyright (C) 2011 Vincent Torri <vtorri at univ-evry dot fr>
dnl That code is public domain and can be freely used or copied.
dnl Macro that check if a library is in a specified directory.
dnl Usage: OPJ_CHECK_LIB_WITH_PREFIX(prefix, header, lib, func [, ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]])
dnl Call AC_SUBST(THELIB_CFLAGS)
dnl Call AC_SUBST(THELIB_LIBS)
dnl where THELIB is the uppercase value of 'lib'
AC_DEFUN([OPJ_CHECK_LIB_WITH_PREFIX],
[
m4_pushdef([UP], m4_toupper([$3]))
m4_pushdef([DOWN], m4_tolower([$3]))
__opj_prefix=$1
__opj_header=$2
__opj_lib=$3
__opj_func=$4
__opj_have_dep="no"
save_CPPFLAGS=${CPPFLAGS}
save_LIBS=${LIBS}
if test "x$UP[_CFLAGS]" != "x"; then
CPPFLAGS="${CPPFLAGS} $UP[_CFLAGS]"
else
if test "x${__opj_prefix}" != "x" ; then
__opj_CPPFLAGS="-I${__opj_prefix}/include"
else
__opj_CPPFLAGS=""
fi
CPPFLAGS="${CPPFLAGS} ${__opj_CPPFLAGS}"
fi
if test "x$UP[_LIBS]" != "x"; then
LIBS="${LIBS} $UP[_LIBS]"
else
if test "x${__opj_prefix}" != "x" ; then
__opj_LIBS="-L${__opj_prefix}/lib -l${__opj_lib}"
else
__opj_LIBS="-l${__opj_lib}"
fi
LIBS="${LIBS} ${__opj_LIBS}"
fi
AC_LINK_IFELSE(
[AC_LANG_PROGRAM(
[[
#include <${__opj_header}>
]],
[[
${__opj_func}();
]])],
[__opj_have_dep="yes"],
[__opj_have_dep="no"])
CPPFLAGS=${save_CPPFLAGS}
LIBS=${save_LIBS}
if test "x${__opj_prefix}" = "x" ; then
AC_MSG_CHECKING([whether ]UP[ library is available in standard or predefined directories])
else
AC_MSG_CHECKING([whether ]UP[ library is available in ${__opj_prefix}])
fi
AC_MSG_RESULT([${__opj_have_dep}])
if test "x${__opj_have_dep}" = "xyes"; then
if test "x${UP[]_CFLAGS}" = "x" ; then
UP[]_CFLAGS="${__opj_CPPFLAGS}"
fi
if test "x${UP[]_LIBS}" = "x" ; then
UP[]_LIBS="${__opj_LIBS}"
fi
fi
AS_IF([test "x${__opj_have_dep}" = "xyes"], [$5], [$6])
m4_popdef([UP])
m4_popdef([DOWN])
])
dnl Macro that check if a library is in a set of directories.
dnl Usage: OPJ_CHECK_LIB(header, lib, func [, ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]])
AC_DEFUN([OPJ_CHECK_LIB],
[
m4_pushdef([UP], m4_toupper([$2]))
__opj_have_dep="no"
OPJ_CHECK_LIB_WITH_PREFIX([],
[$1],
[$2],
[$3],
[__opj_have_dep="yes"],
[__opj_have_dep="no"])
if ! test "x${__opj_have_dep}" = "xyes" ; then
OPJ_CHECK_LIB_WITH_PREFIX([/usr],
[$1],
[$2],
[$3],
[__opj_have_dep="yes"],
[__opj_have_dep="no"])
fi
if ! test "x${__opj_have_dep}" = "xyes" ; then
OPJ_CHECK_LIB_WITH_PREFIX([/usr/local],
[$1],
[$2],
[$3],
[__opj_have_dep="yes"],
[__opj_have_dep="no"])
fi
if ! test "x${__opj_have_dep}" = "xyes" ; then
OPJ_CHECK_LIB_WITH_PREFIX([/opt/local],
[$1],
[$2],
[$3],
[__opj_have_dep="yes"],
[__opj_have_dep="no"])
fi
AC_ARG_VAR(UP[_CFLAGS], [preprocessor flags for lib$2])
AC_SUBST(UP[_CFLAGS])
AC_ARG_VAR(UP[_LIBS], [linker flags for lib$2])
AC_SUBST(UP[_LIBS])
AS_IF([test "x${__opj_have_dep}" = "xyes"], [$4], [$5])
m4_popdef([UP])
])
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