DO NOT MERGE Update libpng to 1.6.20
BUG:23265085
Change-Id: I85199805636d771f3597b691b63bc0bf46084833
(cherry picked from commit bbe98b40cda082024b669fa508931042eed18f82)
diff --git a/scripts/makefile.tc3 b/scripts/makefile.tc3
index 62279b7..1d01502 100644
--- a/scripts/makefile.tc3
+++ b/scripts/makefile.tc3
@@ -12,6 +12,14 @@
LD=tcc
LIB=tlib
LDFLAGS=-m$(MODEL) -L..\zlib
+CP=copy
+
+# Pre-built configuration
+# See scripts\pnglibconf.mak for more options
+!ifndef PNGLIBCONF_H_PREBUILT
+PNGLIBCONF_H_PREBUILT = scripts\pnglibconf.h.prebuilt
+!endif
+
O=.obj
E=.exe
@@ -25,9 +33,8 @@
all: libpng$(MODEL).lib pngtest$(E)
-# see scripts/pnglibconf.mak for more options
-pnglibconf.h: scripts/pnglibconf.h.prebuilt
- cp scripts/pnglibconf.h.prebuilt $@
+pnglibconf.h: $(PNGLIBCONF_H_PREBUILT)
+ $(CP) $(PNGLIBCONF_H_PREBUILT) $@
pngtest: pngtest$(E)