I have been updating my build tools to optionally use autotools (autoconfig/automake/libtool etc..)

As part of this change I have written a couple of M4 macros. This not being something I have done before, any input appreciated on style or if things can be done better.

This macro checks to see if the yaml libraries are installed.

AC_DEFUN([AX_FUNC_THOR_USE_YAML],
[
    AC_ARG_WITH(
        [yamlroot],
        AS_HELP_STRING([--with-yamlroot=<location>], [Directory of YAML_ROOT])
    )
    AC_ARG_ENABLE(
        [yaml],
        AS_HELP_STRING([--disable-yaml], [Disable yaml serializsation])
    )
    AS_IF(
        [test "x$enable_yaml" != "xno"],

        ORIG_LDFLAGS="${LDFLAGS}"
        if test "${with_yamlroot}" != ""; then
            LDFLAGS="$LDFLAGS -L$with_yamlroot/lib"
        fi

        AC_CHECK_LIB(
            [yaml],
            [yaml_parser_initialize],
            [
                AC_DEFINE([HAVE_YAML], 1, [When on Yaml Serialization code will be compiled])
                with_yamllib=-lyaml
            ],
            [AC_MSG_ERROR([
 
Error: Could not find libyaml

You can solve this by installing libyaml
    see http://pyyaml.org/wiki/LibYAML

Alternately specify install location with:
    --with-yamlroot=<location of yaml installation>

If you do not want to use yaml serialization then it
can be disabled with:
    --disable-yaml

                ], [1])]
        )

        LDFLAGS="${ORIG_LDFLAGS}"
    )
])

If yaml is detected then no problems.
If the configure script can not find them the error message is generated. With three options:

1. Disable the use of yaml
2. Provide the location where yaml is installed (not default)
3. Instructions on how to install

I have been updating my build tools to optionally use autotools (autoconfig/automake/libtool etc.).

As part of this change I have written a couple of M4 macros. This not being something I have done before, any input is appreciated on style or if things can be done better.

This macro checks to see if the YAML libraries are installed:

AC_DEFUN([AX_FUNC_THOR_USE_YAML],
[
    AC_ARG_WITH(
        [yamlroot],
        AS_HELP_STRING([--with-yamlroot=<location>], [Directory of YAML_ROOT])
    )
    AC_ARG_ENABLE(
        [yaml],
        AS_HELP_STRING([--disable-yaml], [Disable yaml serializsation])
    )
    AS_IF(
        [test "x$enable_yaml" != "xno"],

        ORIG_LDFLAGS="${LDFLAGS}"
        if test "${with_yamlroot}" != ""; then
            LDFLAGS="$LDFLAGS -L$with_yamlroot/lib"
        fi

        AC_CHECK_LIB(
            [yaml],
            [yaml_parser_initialize],
            [
                AC_DEFINE([HAVE_YAML], 1, [When on Yaml Serialization code will be compiled])
                with_yamllib=-lyaml
            ],
            [AC_MSG_ERROR([
 
Error: Could not find libyaml

You can solve this by installing libyaml
    see http://pyyaml.org/wiki/LibYAML

Alternately specify install location with:
    --with-yamlroot=<location of yaml installation>

If you do not want to use yaml serialization then it
can be disabled with:
    --disable-yaml

                ], [1])]
        )

        LDFLAGS="${ORIG_LDFLAGS}"
    )
])

If YAML is detected, then no problems. If the configure script cannot find them, the error message is generated with three options:

1. Disable the use of YAML
2. Provide the location where YAML is installed (not default)
3. Instructions on how to install

I have been updating my build tools to optionally us autotools (autoconfig/automake/libtool etc..)

As part of this change I have written a couple of M4 macros. This not being something I have done before any input appreciated on style or if things can be done better.

This macro checks to see if the yaml libraries are insalled.

AC_DEFUN([AX_FUNC_THOR_USE_YAML],
[
    AC_ARG_WITH(
        [yamlroot],
        AS_HELP_STRING([--with-yamlroot=<location>], [Directory of YAML_ROOT])
    )
    AC_ARG_ENABLE(
        [yaml],
        AS_HELP_STRING([--disable-yaml], [Disable yaml serializsation])
    )
    AS_IF(
        [test "x$enable_yaml" != "xno"],

        ORIG_LDFLAGS="${LDFLAGS}"
        if test "${with_yamlroot}" != ""; then
            LDFLAGS="$LDFLAGS -L$with_yamlroot/lib"
        fi

        AC_CHECK_LIB(
            [yaml],
            [yaml_parser_initialize],
            [
                AC_DEFINE([HAVE_YAML], 1, [When on Yaml Serialization code will be compiled])
                with_yamllib=-lyaml
            ],
            [AC_MSG_ERROR([
 
Error: Could not find libyaml

You can solve this by installing libyaml
    see http://pyyaml.org/wiki/LibYAML

Alternately specify install location with:
    --with-yamlroot=<location of yaml installation>

If you do not want to use yaml serialization then it
can be disabled with:
    --disable-yaml

                ], [1])]
        )

        LDFLAGS="${ORIG_LDFLAGS}"
    )
])

If yaml is detects then no problems.
If the configure script can not find them the error message is generated. With three options.

1. Disable the use of yaml
2. Provide the location were yaml is installed (not default)
3. Instructions on how to install

I have been updating my build tools to optionally use autotools (autoconfig/automake/libtool etc..)

As part of this change I have written a couple of M4 macros. This not being something I have done before, any input appreciated on style or if things can be done better.

This macro checks to see if the yaml libraries are installed.

AC_DEFUN([AX_FUNC_THOR_USE_YAML],
[
    AC_ARG_WITH(
        [yamlroot],
        AS_HELP_STRING([--with-yamlroot=<location>], [Directory of YAML_ROOT])
    )
    AC_ARG_ENABLE(
        [yaml],
        AS_HELP_STRING([--disable-yaml], [Disable yaml serializsation])
    )
    AS_IF(
        [test "x$enable_yaml" != "xno"],

        ORIG_LDFLAGS="${LDFLAGS}"
        if test "${with_yamlroot}" != ""; then
            LDFLAGS="$LDFLAGS -L$with_yamlroot/lib"
        fi

        AC_CHECK_LIB(
            [yaml],
            [yaml_parser_initialize],
            [
                AC_DEFINE([HAVE_YAML], 1, [When on Yaml Serialization code will be compiled])
                with_yamllib=-lyaml
            ],
            [AC_MSG_ERROR([
 
Error: Could not find libyaml

You can solve this by installing libyaml
    see http://pyyaml.org/wiki/LibYAML

Alternately specify install location with:
    --with-yamlroot=<location of yaml installation>

If you do not want to use yaml serialization then it
can be disabled with:
    --disable-yaml

                ], [1])]
        )

        LDFLAGS="${ORIG_LDFLAGS}"
    )
])

If yaml is detected then no problems.
If the configure script can not find them the error message is generated. With three options:

1. Disable the use of yaml
2. Provide the location where yaml is installed (not default)
3. Instructions on how to install