[libgpiod] Add pkg-config support

Create a libgpiod.pc file for pkg-config. Allows to use
PKG_CHECK_MODULES([gpiod], [libgpiod >= 1.0],,) in other
autoconf-based projects.

Signed-off-by: Clemens Gruber <clemens.gruber@pqgruber.com>
---
 Makefile.am    |  3 +++
 configure.ac   |  3 ++-
 libgpiod.pc.in | 11 +++++++++++
 3 files changed, 16 insertions(+), 1 deletion(-)
 create mode 100644 libgpiod.pc.in

2018-01-22 17:12 GMT+01:00 Clemens Gruber <clemens.gruber@pqgruber.com>:
> Create a libgpiod.pc file for pkg-config. Allows to use
> PKG_CHECK_MODULES([gpiod], [libgpiod >= 1.0],,) in other
> autoconf-based projects.
>
> Signed-off-by: Clemens Gruber <clemens.gruber@pqgruber.com>
> ---
>  Makefile.am    |  3 +++
>  configure.ac   |  3 ++-
>  libgpiod.pc.in | 11 +++++++++++
>  3 files changed, 16 insertions(+), 1 deletion(-)
>  create mode 100644 libgpiod.pc.in
>
> diff --git a/Makefile.am b/Makefile.am
> index af7aecb..dfa6d47 100644
> --- a/Makefile.am
> +++ b/Makefile.am
> @@ -11,6 +11,9 @@ ACLOCAL_AMFLAGS = -I m4
>  AUTOMAKE_OPTIONS = foreign
>  SUBDIRS = include src
>
> +pkgconfigdir = $(libdir)/pkgconfig
> +pkgconfig_DATA = libgpiod.pc
> +
>  if WITH_TESTS
>
>  SUBDIRS += tests
> diff --git a/configure.ac b/configure.ac
> index b4bf214..bb18868 100644
> --- a/configure.ac
> +++ b/configure.ac
> @@ -120,7 +120,8 @@ then
>         AC_MSG_NOTICE([doxygen not found - documentation cannot be generated])
>  fi
>
> -AC_CONFIG_FILES([Makefile
> +AC_CONFIG_FILES([libgpiod.pc
> +                Makefile
>                  include/Makefile
>                  src/Makefile
>                  src/lib/Makefile
> diff --git a/libgpiod.pc.in b/libgpiod.pc.in
> new file mode 100644
> index 0000000..48ff113
> --- /dev/null
> +++ b/libgpiod.pc.in
> @@ -0,0 +1,11 @@
> +prefix=@prefix@
> +exec_prefix=@exec_prefix@
> +libdir=@libdir@
> +includedir=@includedir@
> +
> +Name: libgpiod
> +Description: Library and tools for the Linux GPIO chardev
> +URL: @PACKAGE_URL@
> +Version: @PACKAGE_VERSION@
> +Libs: -L${libdir} -lgpiod
> +Cflags: -I${includedir}
> --
> 2.16.0
>

Applied, thanks!
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