1 files changed, 72 insertions, 0 deletions
diff --git a/m4/package.m4 b/m4/package.m4
new file mode 100644
index 000000000..764f70d45
--- /dev/null
+++ b/m4/package.m4
@@ -0,0 +1,72 @@
+dnl _ACX_VERSION_PARSE(version)
+AC_DEFUN([_ACX_VERSION_PARSE], [`echo $1 | perl -e 'my $v = <>; chomp $v;
+my @v = split(" ", $v); $v = $v[$#v]; $v =~ s/[^0-9.].*$//; @v = split (/\./, $v);
+push @v, 0 while $#v < 2; print $v[0] * 10000 + $v[1] * 100 + $v[2], "\n"'`])
+
+dnl ACX_VERSION_CHECK(required, actual)
+AC_DEFUN([ACX_VERSION_CHECK], [
+    required_version=ifelse([$1], , [0.0.0], [$1])
+    required_version_parsed=_ACX_VERSION_PARSE([$required_version])
+    actual_version=ifelse([$2], , [0.0.0], [$2])
+    actual_version_parsed=_ACX_VERSION_PARSE([$actual_version])
+    if test $required_version_parsed -ge $actual_version_parsed; then
+        ifelse([$3], , [:], [$3])
+    else
+        ifelse([$4], , [:], [$4])
+    fi
+])
+
+AC_DEFUN([ASX_TR_LOWER], [m4_translit([[$1]], [ABCDEFGHIJKLMNOPQRSTUVWXYZ], [abcdefghijklmnopqrstuvwxyz])])
+
+dnl ACX_PACKAGE_CHECK(VARIABLE-PREFIX, MINIMUM-VERSION, CONFIG-SCRIPT,
+dnl     [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])
+AC_DEFUN([ACX_PACKAGE_CHECK], [
+    AC_ARG_VAR([$1][_CONFIG], [Full path to $3])
+    AC_ARG_WITH(ASX_TR_LOWER([$1][-prefix]),
+                [AS_HELP_STRING(ASX_TR_LOWER([--with-][$1][-prefix])[=PATH], [prefix where $3 is installed (optional)])],
+                [package_config_prefix="$withval"], [package_config_prefix=""])
+    AC_ARG_WITH(ASX_TR_LOWER([$1][-exec-prefix]),
+                [AS_HELP_STRING(ASX_TR_LOWER([--with-][$1][-exec-prefix])[=PATH], [exec prefix where $3 is installed (optional)])],
+                [package_config_exec_prefix="$withval"], [package_config_exec_prefix=""])
+    package_config_args=""
+    if test x"$package_config_exec_prefix" != x""; then
+        package_config_args="$package_config_args --exec-prefix=$package_config_exec_prefix"
+        test x"${[$1][_CONFIG]+set}" != x"set" && [$1][_CONFIG]="$package_config_exec_prefix/bin/$3"
+    fi
+    if test x"$package_config_prefix" != x""; then
+        package_config_args="$package_config_args --prefix=$package_config_prefix"
+        test x"${[$1][_CONFIG]+set}" != x"set" && [$1][_CONFIG]="$package_config_prefix/bin/$3"
+    fi
+
+    min_package_version=ifelse([$2], , [0.0.0], [$2])
+    AC_PATH_TOOL([[$1][_CONFIG]], [$3], [no])
+    AC_MSG_CHECKING([for $1 version >= $min_package_version])
+    if test x"$[$1][_CONFIG]" = x"no"; then
+        AC_MSG_RESULT([unknown])
+        AC_MSG_NOTICE([The $3 script installed by $1 could not be found.
+*** If $1 was installed in PREFIX, make sure PREFIX/bin is in your path, or
+*** set the $1][_CONFIG environment variable to the full path to the program.])
+    else
+        [$1][_CFLAGS]="`$[$1][_CONFIG] $package_config_args --cflags`"
+        [$1][_LIBS]="`$[$1][_CONFIG] $package_config_args --libs`"
+        [$1][_VERSION]="`$[$1][_CONFIG] $package_config_args --version`"
+        ACX_VERSION_CHECK([$min_package_version], [$[$1][_VERSION]],
+                          [package_version_ok=yes; AC_MSG_RESULT([yes -- $[$1][_VERSION]])],
+                          [[$1][_CFLAGS]="" [$1][_LIBS]=""; AC_MSG_RESULT([no -- $[$1][_VERSION]])
+                           AC_MSG_NOTICE([If you have already installed a sufficiently new version,
+*** this error probably means that the wrong copy of the $3
+*** shell script is being found. The easiest way to fix this is to remove the
+*** old version, but you can also set the $1][_CONFIG environment
+*** variable to point to the correct copy. In this case, you will have to
+*** modify your LD_LIBRARY_PATH environment variable, or edit /etc/ld.so.conf
+*** so that the correct libraries are found at run-time.])])
+    fi
+
+    if test x"$package_version_ok" = x"yes"; then
+        ifelse([$4], , [:], [$4])
+    else
+        ifelse([$5], , [:], [$5])
+    fi
+    AC_SUBST([$1][_CFLAGS])
+    AC_SUBST([$1][_LIBS])
+])