/usr/share/aclocal/ax_lib_firebird.m4 is in autoconf-archive 20170928-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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# https://www.gnu.org/software/autoconf-archive/ax_lib_firebird.html
# ===========================================================================
#
# SYNOPSIS
#
# AX_LIB_FIREBIRD([MINIMUM-VERSION])
#
# DESCRIPTION
#
# Test for the Firebird client library of a particular version (or newer).
# This macro takes only one optional argument, the required version of
# Firebird library. If required version is not passed, then 1.5.0 is used
# in test of existence of Firebird client library.
#
# For more information about Firebird API versioning check: API Identifies
# Client Version http://www.firebirdsql.org/rlsnotes20/rnfbtwo-apiods.html
#
# If no installation prefix to the installed Firebird library is given the
# macro searches under /usr, /usr/local, and /opt.
#
# This macro calls:
#
# AC_SUBST(FIREBIRD_CFLAGS)
# AC_SUBST(FIREBIRD_LDFLAGS)
# AC_SUBST(FIREBIRD_VERSION)
#
# And sets:
#
# HAVE_FIREBIRD
#
# LICENSE
#
# Copyright (c) 2008 Mateusz Loskot <mateusz@loskot.net>
#
# 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. This file is offered as-is, without any
# warranty.
#serial 13
AC_DEFUN([AX_LIB_FIREBIRD],
[
AC_ARG_WITH([firebird],
AS_HELP_STRING(
[--with-firebird=@<:@ARG@:>@],
[use Firebird client library @<:@default=yes@:>@, optionally specify the prefix for firebird library]
),
[
if test "$withval" = "no"; then
WANT_FIREBIRD="no"
elif test "$withval" = "yes"; then
WANT_FIREBIRD="yes"
ac_firebird_path=""
else
WANT_FIREBIRD="yes"
ac_firebird_path="$withval"
fi
],
[WANT_FIREBIRD="yes"]
)
FIREBIRD_CFLAGS=""
FIREBIRD_LDFLAGS=""
FIREBIRD_VERSION=""
if test "x$WANT_FIREBIRD" = "xyes"; then
ac_firebird_header="ibase.h"
firebird_version_req=ifelse([$1], [], [3.0.0], [$1])
firebird_version_req_shorten=`expr $firebird_version_req : '\([[0-9]]*\.[[0-9]]*\)'`
firebird_version_req_major=`expr $firebird_version_req : '\([[0-9]]*\)'`
firebird_version_req_minor=`expr $firebird_version_req : '[[0-9]]*\.\([[0-9]]*\)'`
firebird_version_req_micro=`expr $firebird_version_req : '[[0-9]]*\.[[0-9]]*\.\([[0-9]]*\)'`
if test "x$firebird_version_req_micro" = "x" ; then
firebird_version_req_micro="0"
fi
dnl FB_API_VER represents the version of Firebird as follows:
dnl - Any version of Interbase, or Firebird 1.0.x: 10
dnl - Firebird 1.5.x: 15
dnl - Firebird 2.0.x: 20
firebird_version_req_number=`expr $firebird_version_req_major \+ $firebird_version_req_minor`
AC_MSG_CHECKING([for Firebird client library >= $firebird_version_req])
if test "$ac_firebird_path" != ""; then
ac_firebird_ldflags="-L$ac_firebird_path/lib"
ac_firebird_cppflags="-I$ac_firebird_path/include"
else
for ac_firebird_path_tmp in /usr /usr/local /opt ; do
if test -f "$ac_firebird_path_tmp/include/$ac_firebird_header" \
&& test -r "$ac_firebird_path_tmp/include/$ac_firebird_header"; then
ac_firebird_path=$ac_firebird_path_tmp
ac_firebird_cppflags="-I$ac_firebird_path_tmp/include"
ac_firebird_ldflags="-L$ac_firebird_path_tmp/lib"
break;
fi
done
fi
ac_firebird_header_path="$ac_firebird_path/include/$ac_firebird_header"
if test ! -f "$ac_firebird_header_path"; then
AC_MSG_RESULT([no])
success="no"
else
ac_firebird_ldflags="$ac_firebird_ldflags -lfbclient -lpthread"
saved_CPPFLAGS="$CPPFLAGS"
CPPFLAGS="$CPPFLAGS $ac_firebird_cppflags"
AC_LANG_PUSH(C++)
AC_COMPILE_IFELSE(
[
AC_LANG_PROGRAM([[@%:@include <ibase.h>]],
[[
#if (FB_API_VER >= $firebird_version_req_number)
// Everything is okay
#else
# error Firebird version is too old
#endif
]]
)
],
[
AC_MSG_RESULT([yes])
success="yes"
],
[
AC_MSG_RESULT([not found])
success="no"
]
)
AC_LANG_POP([C++])
CPPFLAGS="$saved_CPPFLAGS"
if test "$success" = "yes"; then
FIREBIRD_CFLAGS="$ac_firebird_cppflags"
FIREBIRD_LDFLAGS="$ac_firebird_ldflags"
dnl Retrieve Firebird release version
ac_firebird_version=`cat $ac_firebird_header_path | \
grep '#define.*FB_API_VER.*' | \
sed -e 's/.* //'`
if test -n "$ac_firebird_version"; then
ac_firebird_version_major=`expr $ac_firebird_version \/ 10`
ac_firebird_version_minor=`expr $ac_firebird_version \% 10`
FIREBIRD_VERSION="$ac_firebird_version_major.$ac_firebird_version_minor.x"
else
AC_MSG_WARN([Could not find FB_API_VER macro in $ac_firebird_header to get Firebird version.])
fi
AC_SUBST(FIREBIRD_CFLAGS)
AC_SUBST(FIREBIRD_LDFLAGS)
AC_SUBST(FIREBIRD_VERSION)
AC_DEFINE(HAVE_FIREBIRD)
fi
fi
fi
])
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