AC_PREREQ(2.59)

dnl ================================================================
dnl XXX: If you are making a release then you need to check these
dnl sections:
dnl » API versions
dnl   (the pretty numbers that the users see)
dnl
dnl » Interface version details for libtool
dnl   (the shared library versioning information)
dnl
dnl » Source code release status
dnl   (mark the source code as being part of a "release" or from "git")
dnl ================================================================

dnl ================================================================
dnl API versions (i.e. the pretty numbers that users see)
dnl ================================================================
m4_define([cogl_major_version], [2])
m4_define([cogl_minor_version], [0])
m4_define([cogl_micro_version], [0])
m4_define([cogl_version],
          [cogl_major_version.cogl_minor_version.cogl_micro_version])

dnl Since the core Cogl library has to also maintain support for the
dnl Cogl 1.x API for Clutter then we track the 1.x version separately.
m4_define([cogl_1_minor_version], [6])
m4_define([cogl_1_micro_version], [0])
m4_define([cogl_1_version], [1.cogl_1_minor_version.cogl_1_micro_version])

dnl ================================================================
dnl Interface version details for libtool
dnl ================================================================
# Note: we don't automatically deduce the libtool version info from
# the pretty version number that users sees. This is because we want
# to update the pretty version number before making a release since it
# can affect the name of our pkg-config file and the naming or
# location of other installed files which we want to be able to verify
# as correct well before making a release.
#
# For reference on how the various numbers should be updated at
# release time these rules are adapted from the libtool info pages:
#
#  1. Update the version information only immediately before a public
#     release.
#
#  2. If the library source code has changed at all since the last
#     update, then increment REVISION (`C:R:A' becomes `C:r+1:A').
#
#  3. If any interfaces have been added, removed, or changed since the
#     last update, increment CURRENT, and set REVISION to 0.
#
#  4. If any interfaces have been added since the last public release,
#     then increment AGE.
#
#  5. If any interfaces have been removed since the last public release,
#     then set AGE to 0.
m4_define([cogl_lt_current], 0)
m4_define([cogl_lt_revision], 0)
m4_define([cogl_lt_age], 0)
# We do also tell libtool the pretty version:
m4_define([cogl_lt_release], [cogl_version])


dnl ================================================================
dnl Source code release status
dnl ================================================================
# Finally we explicitly track when we are building development source
# from Git vs building source corresponding to a release. As with the
# libtool version info we don't automatically derive this from the
# pretty version number because we want to test the results of
# updating the version number in advance of a release.
m4_define([cogl_release_status], [git])


dnl ================================================================
dnl Required versions for dependencies
dnl ================================================================
m4_define([glib_req_version],           [2.26.0])
m4_define([pangocairo_req_version],     [1.20])
m4_define([gi_req_version],             [0.9.5])
m4_define([gdk_pixbuf_req_version],     [2.0])
m4_define([uprof_req_version],          [0.3])
m4_define([gtk_doc_req_version],        [1.13])
m4_define([xfixes_req_version],         [3])
m4_define([xcomposite_req_version],     [0.4])


AC_INIT(cogl, [cogl_version])
AC_CONFIG_SRCDIR(cogl/cogl.h)
AC_CONFIG_AUX_DIR([build])
AC_CONFIG_MACRO_DIR([build/autotools])
AC_CONFIG_HEADERS(config.h)

# Save this value here, since automake will set cflags later and we
# want to know if the user specified custom cflags or not.
cflags_set=${CFLAGS+set}

AM_INIT_AUTOMAKE([1.11 foreign -Wno-portability no-define no-dist-gzip
                  dist-bzip2])
AM_SILENT_RULES([yes])


dnl ================================================================
dnl Export the API versioning
dnl ================================================================
AC_SUBST([COGL_MAJOR_VERSION],[cogl_major_version])
AC_SUBST([COGL_MINOR_VERSION],[cogl_minor_version])
AC_SUBST([COGL_MICRO_VERSION],[cogl_micro_version])
AC_SUBST([COGL_VERSION],[cogl_version])
AC_SUBST([COGL_API_VERSION],[cogl_major_version.0])
AC_SUBST([COGL_API_VERSION_AM],[$COGL_MAJOR_VERSION\_0])

AC_SUBST([COGL_1_MINOR_VERSION],[cogl_1_minor_version])
AC_SUBST([COGL_1_MICRO_VERSION],[cogl_1_micro_version])
AC_SUBST([COGL_1_VERSION],[cogl_1_version])


dnl ================================================================
dnl Export the libtool versioning
dnl ================================================================
AC_SUBST([COGL_LT_CURRENT], [cogl_lt_current])
AC_SUBST([COGL_LT_REVISION], [cogl_lt_revision])
AC_SUBST([COGL_LT_AGE], [cogl_lt_age])
AC_SUBST([COGL_LT_RELEASE], [cogl_lt_release])


dnl ================================================================
dnl Export the source code release status
dnl ================================================================
AC_SUBST([COGL_RELEASE_STATUS], [cogl_release_status])


dnl ================================================================
dnl Handle extra configure options
dnl ================================================================

dnl     ============================================================
dnl     Enable debugging
dnl     ============================================================
m4_define([default], [m4_if(cogl_release_status, [git], [yes], [no])])
AC_ARG_ENABLE(
  [debug],
  [AC_HELP_STRING([--enable-debug=@<:@no/yes@:>@], [Control Cogl debugging level @<:@default=]default[@:>@])],
  [],
  enable_debug=default
)

AS_CASE(
  [$enable_debug],
  [yes],
  [
    test "$cflags_set" = set || CFLAGS="$CFLAGS -g -O0"
    COGL_EXTRA_CFLAGS="-DCOGL_GL_DEBUG -DCOGL_OBJECT_DEBUG -DCOGL_HANDLE_DEBUG -DCOGL_ENABLE_DEBUG"
  ],
  [no],
  [
    COGL_EXTRA_CFLAGS="-DCOGL_ENABLE_DEBUG -DG_DISABLE_CHECKS -DG_DISABLE_CAST_CHECKS"
  ],
  [AC_MSG_ERROR([Unknown argument for --enable-debug])]
)

AC_SUBST(COGL_DEBUG_CFLAGS)


dnl     ============================================================
dnl     Enable strict compiler flags
dnl     ============================================================

# use strict compiler flags only when building from git; the rules for
# distcheck will take care of turning this on when making a release
m4_define([default], [m4_if(cogl_release_status, [git], [yes], [no])])
AC_ARG_ENABLE(
  [maintainer-flags],
  [AC_HELP_STRING([--enable-maintainer-flags=@<:@no/yes/error@:>@], [Use strict compiler flags @<:@default=]default[@:>@])],
  [],
  enable_maintainer_flags=default
)

MAINTAINER_COMPILER_FLAGS="-Wall -Wshadow -Wcast-align -Wuninitialized
                           -Wno-strict-aliasing -Wempty-body -Wformat
                           -Wformat-security -Winit-self
                           -Wdeclaration-after-statement -Wvla
                           -Wpointer-arith"

AS_CASE(
  [$enable_maintainer_flags],
  [yes],
  [
    AS_COMPILER_FLAGS([MAINTAINER_CFLAGS], [$MAINTAINER_COMPILER_FLAGS])
  ],
  [no],
  [
  ],
  [error],
  [
    MAINTAINER_COMPILER_FLAGS="$MAINTAINER_COMPILER_FLAGS -Werror"
    AS_COMPILER_FLAGS([MAINTAINER_CFLAGS], [$MAINTAINER_COMPILER_FLAGS])
  ],
  [*],
  [AC_MSG_ERROR([Invalid option for --enable-maintainer-flags])]
)

# strip leading spaces
COGL_EXTRA_CFLAGS="$COGL_EXTRA_CFLAGS ${MAINTAINER_CFLAGS/#  }"


dnl     ============================================================
dnl     Choose image loading backend
dnl     ============================================================
AC_ARG_ENABLE(
  [gdk-pixbuf],
  [AC_HELP_STRING([--enable-gdk-pixbuf=@<:@no/yes@:>@], [Enable image loading via gdk-pixbuf @<:@default=yes@:>@])],
  [],
  enable_gdk_pixbuf=yes
)

if test "x$enable_gdk_pixbuf" = "xyes"; then
  PKG_CHECK_EXISTS([xi], [have_gdk_pixbuf=yes], [have_gdk_pixbuf=no])
else
  have_gdk_pixbuf=no
fi

AC_ARG_ENABLE(
  [quartz-image],
  [AC_HELP_STRING([--enable-quartz-image=@<:@no/yes@:>@], [Enable image loading via quartz @<:@default=no@:>@])],
  [],
  enable_quartz_image=no
)

AS_IF(
  [test "x$have_gdk_pixbuf" = "xyes"],
  [
    AC_DEFINE([USE_GDKPIXBUF], 1, [Use GdkPixbuf for loading image data])
    COGL_PKG_REQUIRES="$COGL_PKG_REQUIRES gdk-pixbuf-2.0 >= gdk_pixbuf_req_version"
    COGL_IMAGE_BACKEND="gdk-pixbuf"
  ],
  [test "x$enable_quartz_image" = "xyes"],
  [
    EXPERIMENTAL_CONFIG=yes
    EXPERIMENTAL_OPTIONS="$EXPERIMENTAL_OPTIONS Quartz Core Graphics,"
    AC_DEFINE([USE_QUARTZ], 1,
	      [Use Core Graphics (Quartz) for loading image data])
    COGL_IMAGE_BACKEND="quartz"
  ],
  [
    EXPERIMENTAL_CONFIG=yes
    EXPERIMENTAL_OPTIONS="$EXPERIMENTAL_OPTIONS fallback image decoding (stb_image),"
    AC_DEFINE([USE_INTERNAL], 1,
	      [Use internal image decoding for loading image data])
    COGL_IMAGE_BACKEND="stb_image"
  ]
)


dnl     ============================================================
dnl     Determine which window systems and drivers we can support
dnl     ============================================================

AM_CONDITIONAL(COGL_STANDALONE_BUILD, [true])
AC_DEFINE([COGL_HAS_FULL_WINSYS], [1], [Cogl can create its own OpenGL context])

AC_DEFINE([COGL_HAS_X11_SUPPORT], [1], [Cogl supports the X11 window system])
AC_DEFINE([COGL_HAS_XLIB_SUPPORT], [1], [Cogl supports X11 using the Xlib API])
AC_DEFINE([COGL_HAS_GLX_SUPPORT], [1], [Cogl supports OpenGL using the GLX API])
AC_DEFINE([HAVE_COGL_GL], [1], [Have GL for rendering])

AM_CONDITIONAL(SUPPORT_GLX, [true])
AM_CONDITIONAL(SUPPORT_X11, [true])
AM_CONDITIONAL(SUPPORT_XLIB, [true])
AM_CONDITIONAL(SUPPORT_EGL, [false])
AM_CONDITIONAL(SUPPORT_EGL_PLATFORM_POWERVR_X11, [false])
AM_CONDITIONAL(SUPPORT_EGL_PLATFORM_POWERVR_NULL, [false])
AM_CONDITIONAL(SUPPORT_EGL_PLATFORM_POWERVR_GDL, [false])
AM_CONDITIONAL(SUPPORT_EGL_PLATFORM_DRM_SURFACELESS, [false])
AM_CONDITIONAL(SUPPORT_OSX, [false])
AM_CONDITIONAL(SUPPORT_WIN32, [false])
AM_CONDITIONAL(SUPPORT_CEX100, [false])
AM_CONDITIONAL(SUPPORT_WAYLAND, [false])

AM_CONDITIONAL([COGL_DRIVER_GLES], [false])
AM_CONDITIONAL([COGL_DRIVER_GL],   [true])


dnl ================================================================
dnl Compiler stuff.
dnl ================================================================
AC_PROG_CC
AC_PROG_CPP
AM_PROG_CC_C_O
AC_ISC_POSIX
AC_C_CONST


dnl ================================================================
dnl Libtool stuff.
dnl ================================================================
dnl AC_PROG_LIBTOOL
dnl LIBTOOL="$LIBTOOL --preserve-dup-deps"
LT_PREREQ([2.2.6])
LT_INIT([disable-static])

dnl ================================================================
dnl I18n stuff.
dnl ================================================================
AM_GNU_GETTEXT_VERSION([0.17])
AM_GNU_GETTEXT([external])

GETTEXT_PACKAGE="cogl"
AC_SUBST(GETTEXT_PACKAGE)
AC_DEFINE_UNQUOTED(GETTEXT_PACKAGE,
                   "$GETTEXT_PACKAGE",
                   [The prefix for our gettext translation domains.])
AS_ALL_LINGUAS


dnl ================================================================
dnl Documentation stuff.
dnl ================================================================
GTK_DOC_CHECK([gtk_doc_req_version], [--flavour no-tmpl])


dnl ================================================================
dnl Check for dependency packages.
dnl ================================================================

dnl     ============================================================
dnl     Check glib dependencies
dnl     ============================================================
AM_PATH_GLIB_2_0([glib_req_version],
                 [have_glib=yes], [have_glib=no],
                 [gobject gthread gmodule-no-export])
AS_IF([test "x$have_glib" = "xno"], AC_MSG_ERROR([glib-2.0 is required]))

COGL_PKG_REQUIRES="$COGL_PKG_REQUIRES glib-2.0 pangocairo >= pangocairo_req_version gl"
AC_SUBST(COGL_PKG_REQUIRES)
PKG_CHECK_MODULES(COGL_DEP, [$COGL_PKG_REQUIRES])

dnl     ============================================================
dnl     Check X11 dependencies (if supporting any X11 based winsys)
dnl     ============================================================
AS_IF(
  [test "x$SUPPORT_XLIB" = "x1"],
  [COGL_PKG_REQUIRES="$COGL_PKG_REQUIRES x11 xext xfixes >= xfixes_req_version xdamage xcomposite >= xcomposite_req_version"]
)

AM_CONDITIONAL(X11_TESTS, [test "x$SUPPORT_XLIB" = "x1"])


dnl ================================================================
dnl Misc program dependencies.
dnl ================================================================
AC_PROG_INSTALL

dnl ================================================================
dnl GObject-Introspection check
dnl ================================================================
GOBJECT_INTROSPECTION_CHECK([gi_req_version])

dnl ================================================================
dnl Checks for header files.
dnl ================================================================
AC_PATH_X
AC_HEADER_STDC
AC_CHECK_HEADERS(fcntl.h limits.h unistd.h signal.h)


dnl ================================================================
dnl Checks for library functions.
dnl ================================================================
AC_TYPE_SIGNAL
AC_CHECK_FUNCS(putenv strdup)


COGL_DEFINES_SYMBOLS="COGL_HAS_X11 COGL_HAS_X11_SUPPORT COGL_HAS_XLIB COGL_HAS_XLIB_SUPPORT COGL_HAS_GL CLUTTER_COGL_HAS_GL"

COGL_DEFINES=""
for x in $COGL_DEFINES_SYMBOLS; do
  COGL_DEFINES="$COGL_DEFINES
#define $x 1"
done;

AC_SUBST(COGL_DEFINES)

COGL_GL_HEADER_INCLUDES="#include <GL/gl.h>"
AC_SUBST(COGL_GL_HEADER_INCLUDES)

AM_CONDITIONAL([COGL_DRIVER_GL],   [true])
AC_DEFINE([COGL_ENABLE_EXPERIMENTAL_2_0_API], [1],
          [Can use Cogl 2.0 API internally])

PKG_CHECK_EXISTS([gl],
		 [BACKEND_PC_FILES="$BACKEND_PC_FILES gl"],
		 # if a pkg-config file isn't found just add -lGL
		 # and hope for the best.
		 [FLAVOUR_LIBS="$FLAVOUR_LIBS -lGL"])

COGL_WINSYS=glx
AC_SUBST([COGL_WINSYS])
COGL_DRIVER=gl
AC_SUBST([COGL_DRIVER])

COGL_DEBUG_CFLAGS="-DCOGL_GL_DEBUG -DCOGL_OBJECT_DEBUG -DCOGL_HANDLE_DEBUG -DCOGL_ENABLE_DEBUG"

dnl ================================================================
dnl What needs to be substituted in other files
dnl ================================================================
AC_SUBST(COGL_DEP_CFLAGS)
AC_SUBST(COGL_DEP_LIBS)
AC_SUBST(COGL_EXTRA_CFLAGS)
AC_SUBST(COGL_EXTRA_LDFLAGS)

AC_OUTPUT(
Makefile
cogl/Makefile
cogl/cogl-1.0.pc
cogl/cogl-$COGL_MAJOR_VERSION.0.pc:cogl/cogl.pc.in
cogl/cogl-defines.h
pango/Makefile
po/Makefile.in
)

dnl ================================================================
dnl Dah Da!
dnl ================================================================
echo ""
echo "Cogl - $COGL_1_VERSION/$COGL_VERSION (${COGL_RELEASE_STATUS})"

# Global flags
echo ""
echo " • Global:"
echo "        Prefix: ${prefix}"

# Compiler/Debug related flags
echo ""
echo " • Compiler options:"
echo "        Cogl debug: ${enable_debug}"
echo "        Compiler flags: ${CFLAGS} ${COGL_EXTRA_CFLAGS}"

# Miscellaneous
echo ""
echo " • Extra:"
echo "        Build introspection data: ${enable_introspection}"
echo "        Image backend: ${COGL_IMAGE_BACKEND}"

echo ""

# General warning about experimental features
if test "x$EXPERIMENTAL_CONFIG" = "xyes"; then
echo ""
echo "☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠"
echo " *WARNING*"
echo ""
echo "  The stability of your build might be affected by one or more"
echo "  experimental configuration options."
echo
echo "  experimental options: $EXPERIMENTAL_OPTIONS"
echo "☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠☠"
echo ""
fi