[PATCH RESEND i-g-t v4 19/31] tools/intel_backlight: link with minimal sub-libraries

intel_backlight only needs MMIO/register access helpers and the chipset
metadata they use. The full libigt.so stack is unnecessary.

Add lib_igt_reg_tools and link intel_backlight against it instead of
libigt.so.

ldd before: 35  (ldd | wc -l)
ldd after:   5  (ldd | wc -l)

Signed-off-by: Sebastian Brzezinka <[email protected]>
Acked-by: Ashutosh Dixit <[email protected]>
Reviewed-by: Krzysztof Niemiec <[email protected]>
Reviewed-by: Krzysztof Karas <[email protected]>
---
 tools/meson.build | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/tools/meson.build b/tools/meson.build
index 46cf1a717..8899a5b49 100644
--- a/tools/meson.build
+++ b/tools/meson.build
@@ -15,7 +15,6 @@ tools_progs = [
 	'igt_facts',
 	'igt_power',
 	'intel_audio_dump',
-	'intel_backlight',
 	'intel_bios_dumper',
 	'intel_display_bandwidth',
 	'intel_display_crc',
@@ -92,6 +91,11 @@ executable('intel_vbt_decode', 'intel_vbt_decode.c',
 	   install_rpath : bindir_rpathdir,
 	   install : true)
 
+executable('intel_backlight', 'intel_backlight.c',
+	   dependencies : [lib_igt_reg_tools, pciaccess, libdrm],
+	   install_rpath : bindir_rpathdir,
+	   install : true)
+
 if libudev.found()
 	intel_dp_compliance_src = [
 		'intel_dp_compliance.c',
-- 
2.53.0