configure: Look for Khronos OpenGL spec files using pkg-config

Look for Khronos OpenGL spec files using pkg-config, rather than downloading them

Also add a --with-khronos-spec-dir=PATH configure option so XWin can be directed
where to find these files without using the khronos-spec-files package

XWin with AIGLX requires OpenGL spec files in order to generate wrapper code which:
(1) thunks from the glapi dispatch table which uses the default cdecl calling convention
to native GL functions using the stdcall calling convention.
(2) performs function address lookup for OpenGL 1.2+ functions, which are treated
as extensions and so not directly linkable.

v2: KHRONOS_SPEC_DIR is only valid when XWIN_GLX_WINDOWS is defined. Avoid 'make dist'
seeing invalid dependencies by only including rules using KHRONOS_SPEC_DIR if
XWIN_GLX_WINDOWS is defined

Signed-off-by: Jon TURNEY <jon.turney@dronecode.org.uk>
Reviewed-by: Colin Harrison <colin.harrison@virgin.net>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
This commit is contained in:
Jon TURNEY 2011-04-06 16:23:45 +01:00
commit a50878682c
3 changed files with 21 additions and 29 deletions

View file

@ -598,6 +598,9 @@ AC_ARG_ENABLE(glx-tls, AS_HELP_STRING([--enable-glx-tls], [Build GLX with
GLX_USE_TLS=yes
fi])
AC_SUBST(GLX_TLS, ${GLX_USE_TLS})
AC_ARG_WITH(khronos-spec-dir, AS_HELP_STRING([--with-khronos-spec-dir=PATH], [Path to Khronos OpenGL registry database files (default: auto)]),
[KHRONOS_SPEC_DIR="${withval}"],
[KHRONOS_SPEC_DIR=auto])
dnl Extensions.
AC_ARG_ENABLE(registry, AS_HELP_STRING([--disable-registry], [Build string registry module (default: enabled)]), [XREGISTRY=$enableval], [XREGISTRY=yes])
@ -1854,6 +1857,16 @@ if test "x$XWIN" = xyes; then
AC_DEFINE(DDXOSVERRORF, 1, [Use OsVendorVErrorF])
AC_DEFINE(DDXBEFORERESET, 1, [Use ddxBeforeReset ])
dnl XWin with AIGLX requires OpenGL spec files in order to generate wrapper code for native GL functions
if [test "x$XWIN" = xyes && test "x$AIGLX" = xyes] ; then
if test "x$KHRONOS_SPEC_DIR" = "xauto" ; then
PKG_CHECK_MODULES([KHRONOS_OPENGL_REGISTRY], [khronos-opengl-registry])
KHRONOS_SPEC_DIR=`pkg-config khronos-opengl-registry --variable=specdir`
fi
AC_SUBST(KHRONOS_SPEC_DIR)
fi
fi
AM_CONDITIONAL(XWIN, [test "x$XWIN" = xyes])
AM_CONDITIONAL(XWIN_MULTIWINDOW, [test "x$XWIN" = xyes])