From 55924d11095df25ab25c405fadfe93d0a46f82eb Mon Sep 17 00:00:00 2001
From: costan <costan@google.com>
Date: Wed, 16 Aug 2017 18:46:27 -0700
Subject: Add GNUInstallDirs to CMake configuration.

This is modeled after https://github.com/google/googletest/pull/1160.
The immediate benefit is fixing the library install paths on 64-bit
Linux distributions, which tend to support running 32-bit and 64-bit
code side by side by installing 32-bit libraries in /usr/lib and  64-bit
libraries in /usr/lib64.
---
 CMakeLists.txt | 18 ++++++++++++++----
 1 file changed, 14 insertions(+), 4 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 2a90a08..035f862 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -140,14 +140,20 @@ if(SNAPPY_BUILD_TESTS)
     COMMAND "${PROJECT_BINARY_DIR}/snappy_unittest")
 endif(SNAPPY_BUILD_TESTS)
 
-install(TARGETS snappy EXPORT SnappyTargets DESTINATION lib)
+include(GNUInstallDirs)
+install(TARGETS snappy
+  EXPORT SnappyTargets
+  RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
+  LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
+  ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
+)
 install(
   FILES
     "${PROJECT_SOURCE_DIR}/snappy-c.h"
     "${PROJECT_SOURCE_DIR}/snappy-sinksource.h"
     "${PROJECT_SOURCE_DIR}/snappy.h"
     "${PROJECT_BINARY_DIR}/snappy-stubs-public.h"
-  DESTINATION include
+  DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}
 )
 
 include(CMakePackageConfigHelpers)
@@ -155,10 +161,14 @@ write_basic_package_version_file(
     "${PROJECT_BINARY_DIR}/SnappyConfigVersion.cmake"
     COMPATIBILITY SameMajorVersion
 )
-install(EXPORT SnappyTargets NAMESPACE Snappy:: DESTINATION lib/cmake/Snappy)
+install(
+  EXPORT SnappyTargets
+  NAMESPACE Snappy::
+  DESTINATION "${CMAKE_INSTALL_LIBDIR}/cmake/Snappy"
+)
 install(
   FILES
     "${PROJECT_SOURCE_DIR}/cmake/SnappyConfig.cmake"
     "${PROJECT_BINARY_DIR}/SnappyConfigVersion.cmake"
-  DESTINATION lib/cmake/Snappy
+  DESTINATION "${CMAKE_INSTALL_LIBDIR}/cmake/Snappy"
 )
-- 
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