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cmake: make finding zlib in-tree easier

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When building libspng as a sub-module alongside zlib as a sub-module,
then it becomes much easier to locate the in-tree zlib when the
ZLIB_ROOT variable can be set to ${zlib_BINARY_DIR}.  This is especially
useful when building on Windows where zlib-dev typically isn't
installed.
This commit is contained in:
Michael Malone 2022-04-21 14:09:48 +12:00 committed by Randy
parent 0bd962bb8e
commit 82b0c5107d
1 changed files with 5 additions and 0 deletions
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5
CMakeLists.txt
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@ -14,6 +14,11 @@ option(BUILD_EXAMPLES "Build examples" ON)
include(GNUInstallDirs)
# Allow the usage of [PackageName]_ROOT variables for FindPackage
if(${CMAKE_VERSION} VERSION_GREATER_EQUAL "3.12")
cmake_policy(SET CMP0074 NEW)
endif()
find_package(ZLIB REQUIRED)
include_directories(${ZLIB_INCLUDE_DIRS})