util: automake: rework the format_srgb.c rule
A handful of changes/cleanups paving the way to bmake support:
- Remove optional $(srcdir)/ prefix for files in the prereq list.
- Drop the space after the AM_V_GEN variable.
- Using $< in a non-suffix rule is a GNU make idiom.
- Use $(@D) over $(dir $@). The latter is a POSIX standard.
v2: Cosmetic tweaks in the commit summary.
Cc: 11.0 <mesa-stable@lists.freedesktop.org>
Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
Reviewed-by: Matt Turner <mattst88@gmail.com> (v1)
diff --git a/src/util/Makefile.am b/src/util/Makefile.am
index 761023d..e05a2c5 100644
--- a/src/util/Makefile.am
+++ b/src/util/Makefile.am
@@ -55,5 +55,7 @@
CLEANFILES = $(BUILT_SOURCES)
EXTRA_DIST = format_srgb.py SConscript
-format_srgb.c: $(srcdir)/format_srgb.py
- $(AM_V_GEN) $(PYTHON2) $< > $@
+PYTHON_GEN = $(AM_V_GEN)$(PYTHON2) $(PYTHON_FLAGS)
+
+format_srgb.c: format_srgb.py
+ $(PYTHON_GEN) $(srcdir)/format_srgb.py > $@