=> "/opt/local/bin/bmake" ["-C", "/data/jenkins/workspace/pkgsrc-trunk-x86_64/sysutils/intel-backlight", "all", "BATCH=1", "DEPENDS_TARGET=/nonexistent"]
===> Building for intel-backlight-20200418nb1
--- intel_backlight ---
gcc -o intel_backlight  -L/opt/local/lib -Wl,-R/opt/local/lib -L/usr/lib/amd64 -Wl,-R/usr/lib/amd64 intel_reg_map.c intel_mmio.c intel_backlight.c intel_drm.c intel_pci.c -pipe -O2 -msave-args -fno-aggressive-loop-optimizations -I/opt/local/include -I/opt/local/include/libdrm -I/usr/include  -ldrm_intel -lpciaccess
intel_drm.c: In function 'intel_get_total_swap_mb':
intel_drm.c:174:2: warning: #warning "Unknown how to get swap size for this OS" [-Wcpp]
  174 | #warning "Unknown how to get swap size for this OS"
      |  ^~~~~~~