meson: fix building OpenGL video output on OpenBSD / NetBSD
[135/1731] Compiling C object modules/video_output/opengl/libvlc_opengl.a.p/filter.c.o
FAILED: modules/video_output/opengl/libvlc_opengl.a.p/filter.c.o
cc -Imodules/video_output/opengl/libvlc_opengl.a.p -Imodules/video_output/opengl -I../modules/video_output/opengl -I. -I.. -Iinclude -I../include -I../compat/stdbit -I../compat/stdckdint -fdiagnostics-color=always -D_FILE_OFFSET_BITS=64 -Wall -Winvalid-pch -std=gnu17 -O0 -g -DHAVE_CONFIG_H=1 -Wno-deprecated-copy -Wextra -Wsign-compare -Wundef -Wpointer-arith -Wvolatile-register-var -Wformat -Wformat-security -Wbad-function-cast -Wwrite-strings -Wmissing-prototypes -Werror-implicit-function-declaration -Winit-self -pipe -mbranch-protection=standard -Wall -Werror-implicit-function-declaration -fvisibility=hidden -fPIC -MD -MQ modules/video_output/opengl/libvlc_opengl.a.p/filter.c.o -MF modules/video_output/opengl/libvlc_opengl.a.p/filter.c.o.d -o modules/video_output/opengl/libvlc_opengl.a.p/filter.c.o -c ../modules/video_output/opengl/filter.c
In file included from ../modules/video_output/opengl/filter.c:26:
In file included from ../modules/video_output/opengl/filter_priv.h:30:
In file included from ../modules/video_output/opengl/picture.h:30:
../modules/video_output/opengl/gl_common.h:47:12: fatal error: 'GL/gl.h' file not found
^~~~~~~~~
1 error generated.
[136/1731] Compiling C object modules/video_output/opengl/libvlc_opengl.a.p/gl_api.c.o
FAILED: modules/video_output/opengl/libvlc_opengl.a.p/gl_api.c.o
cc -Imodules/video_output/opengl/libvlc_opengl.a.p -Imodules/video_output/opengl -I../modules/video_output/opengl -I. -I.. -Iinclude -I../include -I../compat/stdbit -I../compat/stdckdint -fdiagnostics-color=always -D_FILE_OFFSET_BITS=64 -Wall -Winvalid-pch -std=gnu17 -O0 -g -DHAVE_CONFIG_H=1 -Wno-deprecated-copy -Wextra -Wsign-compare -Wundef -Wpointer-arith -Wvolatile-register-var -Wformat -Wformat-security -Wbad-function-cast -Wwrite-strings -Wmissing-prototypes -Werror-implicit-function-declaration -Winit-self -pipe -mbranch-protection=standard -Wall -Werror-implicit-function-declaration -fvisibility=hidden -fPIC -MD -MQ modules/video_output/opengl/libvlc_opengl.a.p/gl_api.c.o -MF modules/video_output/opengl/libvlc_opengl.a.p/gl_api.c.o.d -o modules/video_output/opengl/libvlc_opengl.a.p/gl_api.c.o -c ../modules/video_output/opengl/gl_api.c
In file included from ../modules/video_output/opengl/gl_api.c:26:
In file included from ../modules/video_output/opengl/gl_api.h:33:
../modules/video_output/opengl/gl_common.h:47:12: fatal error: 'GL/gl.h' file not found
^~~~~~~~~
1 error generated.
[138/1731] Compiling C object modules/video_output/opengl/libvlc_opengl.a.p/gl_util.c.o
FAILED: modules/video_output/opengl/libvlc_opengl.a.p/gl_util.c.o
cc -Imodules/video_output/opengl/libvlc_opengl.a.p -Imodules/video_output/opengl -I../modules/video_output/opengl -I. -I.. -Iinclude -I../include -I../compat/stdbit -I../compat/stdckdint -fdiagnostics-color=always -D_FILE_OFFSET_BITS=64 -Wall -Winvalid-pch -std=gnu17 -O0 -g -DHAVE_CONFIG_H=1 -Wno-deprecated-copy -Wextra -Wsign-compare -Wundef -Wpointer-arith -Wvolatile-register-var -Wformat -Wformat-security -Wbad-function-cast -Wwrite-strings -Wmissing-prototypes -Werror-implicit-function-declaration -Winit-self -pipe -mbranch-protection=standard -Wall -Werror-implicit-function-declaration -fvisibility=hidden -fPIC -MD -MQ modules/video_output/opengl/libvlc_opengl.a.p/gl_util.c.o -MF modules/video_output/opengl/libvlc_opengl.a.p/gl_util.c.o.d -o modules/video_output/opengl/libvlc_opengl.a.p/gl_util.c.o -c ../modules/video_output/opengl/gl_util.c
In file included from ../modules/video_output/opengl/gl_util.c:26:
In file included from ../modules/video_output/opengl/gl_util.h:31:
../modules/video_output/opengl/gl_common.h:47:12: fatal error: 'GL/gl.h' file not found
^~~~~~~~~
1 error generated.
[139/1731] Compiling C object modules/video_output/opengl/libvlc_opengl.a.p/importer.c.o
FAILED: modules/video_output/opengl/libvlc_opengl.a.p/importer.c.o
cc -Imodules/video_output/opengl/libvlc_opengl.a.p -Imodules/video_output/opengl -I../modules/video_output/opengl -I. -I.. -Iinclude -I../include -I../compat/stdbit -I../compat/stdckdint -fdiagnostics-color=always -D_FILE_OFFSET_BITS=64 -Wall -Winvalid-pch -std=gnu17 -O0 -g -DHAVE_CONFIG_H=1 -Wno-deprecated-copy -Wextra -Wsign-compare -Wundef -Wpointer-arith -Wvolatile-register-var -Wformat -Wformat-security -Wbad-function-cast -Wwrite-strings -Wmissing-prototypes -Werror-implicit-function-declaration -Winit-self -pipe -mbranch-protection=standard -Wall -Werror-implicit-function-declaration -fvisibility=hidden -fPIC -MD -MQ modules/video_output/opengl/libvlc_opengl.a.p/importer.c.o -MF modules/video_output/opengl/libvlc_opengl.a.p/importer.c.o.d -o modules/video_output/opengl/libvlc_opengl.a.p/importer.c.o -c ../modules/video_output/opengl/importer.c
In file included from ../modules/video_output/opengl/importer.c:29:
In file included from ../modules/video_output/opengl/importer_priv.h:26:
In file included from ../modules/video_output/opengl/gl_api.h:33:
../modules/video_output/opengl/gl_common.h:47:12: fatal error: 'GL/gl.h' file not found
^~~~~~~~~
1 error generated.
[140/1731] Compiling C object modules/video_output/opengl/libvlc_opengl.a.p/interop.c.o
FAILED: modules/video_output/opengl/libvlc_opengl.a.p/interop.c.o
cc -Imodules/video_output/opengl/libvlc_opengl.a.p -Imodules/video_output/opengl -I../modules/video_output/opengl -I. -I.. -Iinclude -I../include -I../compat/stdbit -I../compat/stdckdint -fdiagnostics-color=always -D_FILE_OFFSET_BITS=64 -Wall -Winvalid-pch -std=gnu17 -O0 -g -DHAVE_CONFIG_H=1 -Wno-deprecated-copy -Wextra -Wsign-compare -Wundef -Wpointer-arith -Wvolatile-register-var -Wformat -Wformat-security -Wbad-function-cast -Wwrite-strings -Wmissing-prototypes -Werror-implicit-function-declaration -Winit-self -pipe -mbranch-protection=standard -Wall -Werror-implicit-function-declaration -fvisibility=hidden -fPIC -MD -MQ modules/video_output/opengl/libvlc_opengl.a.p/interop.c.o -MF modules/video_output/opengl/libvlc_opengl.a.p/interop.c.o.d -o modules/video_output/opengl/libvlc_opengl.a.p/interop.c.o -c ../modules/video_output/opengl/interop.c
In file included from ../modules/video_output/opengl/interop.c:28:
In file included from ../modules/video_output/opengl/gl_util.h:31:
../modules/video_output/opengl/gl_common.h:47:12: fatal error: 'GL/gl.h' file not found
^~~~~~~~~
1 error generated.