meson: build libgl-gdi target

v4: - Fix check for broken mingw (should be for x86 not x86_64)
    - Add comment about why check is needed

Acked-by: Kristian H. Kristensen <hoegsberg@google.com>

src/gallium/meson.build

@@ -207,6 +207,7 @@ if with_gallium_st_nine
 endif
 if with_platform_windows
   subdir('state_trackers/wgl')
+  subdir('targets/libgl-gdi')
 endif
 if with_tests
   subdir('targets/graw-null')

src/gallium/targets/libgl-gdi/meson.build

@@ -0,0 +1,45 @@
+# Copyright © 2018 Intel Corporation
+
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+
+# The above copyright notice and this permission notice shall be included in
+# all copies or substantial portions of the Software.
+
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.
+
+# DEF parser in certain versions of MinGW is busted, as does not behave as
+# MSVC. mingw-w64 works fine.
+if cc.get_id() == 'gcc' and host_machine.cpu_family() != 'x86_64'
+  ogldef = files('../../state_trackers/wgl/opengl32.mingw.def')[0]
+else
+  ogldef = files('../../state_trackers/wgl/opengl32.def')[0]
+endif
+
+libopengl32 = shared_library(
+  'opengl32',
+  ['libgl_gdi.c'],
+  vs_module_defs : ogldef,
+  include_directories : [
+    inc_common, inc_wgl, inc_gallium_winsys_sw, inc_gallium_drivers,
+  ],
+  link_whole : [libwgl],
+  link_with : [
+    libgallium, libglsl, libmesa_gallium, libwsgdi, libglapi_static, libglapi
+  ],
+  dependencies : [
+    dep_ws2_32, idep_nir, idep_mesautil, driver_swrast, driver_swr,
+  ],
+  name_prefix : '',  # otherwise mingw will create libopengl32.dll
+  install : true,
+)