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pngminus: Use the system zlib by default

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If a zlib source tree exists besides the libpng source tree in the
same parent directory, the pngminus build may fail, unless the zlib
tree is built fully. In order to avoid this failing scenario, do not
use the custom-built zlib by default.

(The custom-built zlib is still necessary on platforms that lack a
system-built zlib.)
This commit is contained in:
Cosmin Truta 2019-04-10 22:23:25 -04:00
parent 62a56d4fcc
commit 27e8b99287
1 changed files with 8 additions and 3 deletions
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11
contrib/pngminus/Makefile
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@ -11,9 +11,14 @@ PNGINC = -I../..
PNGLIB_SHARED = -L../.. -lpng
PNGLIB_STATIC = ../../libpng.a
ZINC = -I../../../zlib
ZLIB_SHARED = -L../../../zlib -lz
ZLIB_STATIC = ../../../zlib/libz.a
# Uncomment the following if you have a custom zlib build at ../../../zlib
#ZINC = -I../../../zlib
#ZLIB_SHARED = -L../../../zlib -lz
#ZLIB_STATIC = ../../../zlib/libz.a
# Use the system zlib otherwise
ZLIB_SHARED = -lz
ZLIB_STATIC = -lz
CPPFLAGS = $(PNGINC) $(ZINC)
CFLAGS =