loader: introduce the loader util lib

All the various window system integration layers duplicate roughly the
same code for figuring out device and driver name, pci-id's, etc.  Which
is sad.  So extract it out into a loader util lib.

v2 (Emil)
* Separate the introduction of libloader from the code de-duplication.
* Strip out non-pci devices support.
* Add scons + Android build system support.
* Add VISIBILITY_CFLAGS to avoid exporting the loader funcs.

v3 (Emil)
* PIPE_OS_ANDROID is undefined at this scope, use ANDROID
* Make sure we define _EGL_NO_DRM when building only swrast

Signed-off-by: Rob Clark <[email protected]>
Signed-off-by: Emil Velikov <[email protected]>
Reviewed-by: Rob Clark <[email protected]>
Reviewed-by: Kristian Høgsberg <[email protected]>
Reviewed-by: Ian Romanick <[email protected]>

1 files changed, 28 insertions, 0 deletions

diff --git a/src/loader/SConscript b/src/loader/SConscript
new file mode 100644
index 00000000000..454e3284491
--- /dev/null
+++ b/src/loader/SConscript
@@ -0,0 +1,28 @@
+Import('*')
+
+if not env['drm']:
+    Return()
+
+env = env.Clone()
+
+env.Prepend(CPPPATH = [
+    '.',
+    '#include'
+])
+
+env.PkgUseModules('DRM')
+
+if env['udev']:
+    env.PkgUseModules('UDEV')
+    env.Append(CPPDEFINES = ['HAVE_LIBUDEV'])
+
+# parse Makefile.sources
+sources = env.ParseSourceList('Makefile.sources', 'LOADER_C_FILES')
+
+libloader = env.ConvenienceLibrary(
+    target = 'libloader',
+    source = sources,
+)
+
+env.Alias('libloader', libloader)
+Export('libloader')