https://github.com/OSGeo/libgeotiff/pull/74

From d18deccb461990c826ceee8fbcc57a44502ace2e Mon Sep 17 00:00:00 2001
From: Sam James <sam@gentoo.org>
Date: Sun, 20 Mar 2022 02:55:50 +0000
Subject: [PATCH] CMake: adopt GNUInstallDirs

This makes it a lot easier for packagers (it happens by default
if we've setup our environment correctly) to have files installed in the right
places, including libdir, but also documentation, which can vary.

This works cross-platform still but it means libgeotiff uses the
standard options which CMake projects tend to use for such locations
and therefore no special treatment is needed when packaging it.

Fixes: https://github.com/OSGeo/issues/33
Signed-off-by: Sam James <sam@gentoo.org>
---
 CMakeLists.txt     | 41 ++++++++++-------------------------
 bin/CMakeLists.txt |  6 ++---
 2 files changed, 14 insertions(+), 33 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 001df67..1840258 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -7,6 +7,8 @@
 ###############################################################################
 PROJECT(GeoTIFF)
 
+include(GNUInstallDirs)
+
 SET(GEOTIFF_LIB_NAME geotiff)
 SET(GEOTIFF_LIBRARY_TARGET geotiff_library)
 
@@ -239,38 +241,17 @@ SET(GEOTIFF_MAN_PAGES
 
 #    ${PROJECT_BINARY_DIR}/geotiff_version.h
 
-SET(DEFAULT_BIN_SUBDIR bin)
-SET(DEFAULT_LIB_SUBDIR lib)
-SET(DEFAULT_INCLUDE_SUBDIR include)
-
-# Locations are changeable by user to customize layout of GeoTIFF installation
-# (default values are platform-specIFic)
-SET(GEOTIFF_BIN_SUBDIR ${DEFAULT_BIN_SUBDIR} CACHE STRING
-    "Subdirectory where executables will be installed")
-SET(GEOTIFF_LIB_SUBDIR ${DEFAULT_LIB_SUBDIR} CACHE STRING
-    "Subdirectory where libraries will be installed")
-SET(GEOTIFF_INCLUDE_SUBDIR ${DEFAULT_INCLUDE_SUBDIR} CACHE STRING
-    "Subdirectory where header files will be installed")
-
-# Mark *_SUBDIR variables as advanced and dedicated to use by power-users only.
-MARK_AS_ADVANCED(GEOTIFF_BIN_SUBDIR GEOTIFF_LIB_SUBDIR GEOTIFF_INCLUDE_SUBDIR)
-
-# Full paths for the installation
-SET(GEOTIFF_BIN_DIR ${GEOTIFF_BIN_SUBDIR})
-SET(GEOTIFF_LIB_DIR ${GEOTIFF_LIB_SUBDIR})
-SET(GEOTIFF_INCLUDE_DIR ${GEOTIFF_INCLUDE_SUBDIR})
-
 # Install doc files
 INSTALL(FILES
     AUTHORS ChangeLog COPYING INSTALL LICENSE README README_BIN README.WIN
-    DESTINATION doc)
+    DESTINATION ${CMAKE_INSTALL_DOCDIR})
 
 # Install man pages
-INSTALL(FILES ${GEOTIFF_MAN_PAGES} DESTINATION share/man/man1)
+INSTALL(FILES ${GEOTIFF_MAN_PAGES} DESTINATION ${CMAKE_INSTALL_MANDIR}/man1)
 
 
 # Install header files for development distribution
-INSTALL(FILES ${GEOTIFF_LIB_HEADERS} DESTINATION ${GEOTIFF_INCLUDE_DIR})
+INSTALL(FILES ${GEOTIFF_LIB_HEADERS} DESTINATION ${CMAKE_INSTALL_INCLUDEDIR})
 
 ###############################################################################
 # Build libxtiff library
@@ -323,7 +304,7 @@ if(UNIX)
       set_target_properties(
         ${GEOTIFF_LIBRARY_TARGET}
         PROPERTIES
-        INSTALL_NAME_DIR "${CMAKE_INSTALL_PREFIX}/${GEOTIFF_LIB_DIR}")
+        INSTALL_NAME_DIR "${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_LIBDIR}")
    endif()
 endif()
 
@@ -348,14 +329,14 @@ target_link_libraries(${GEOTIFF_LIBRARY_TARGET} PRIVATE
 target_include_directories(
   ${GEOTIFF_LIBRARY_TARGET}
   PUBLIC $<BUILD_INTERFACE:${PROJECT_SOURCE_DIR}>
-         $<INSTALL_INTERFACE:${GEOTIFF_INCLUDE_DIR}>)
+         $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>)
 
 INSTALL( TARGETS ${GEOTIFF_LIBRARY_TARGET}
      EXPORT depends
-     RUNTIME DESTINATION ${GEOTIFF_BIN_DIR}
-     LIBRARY DESTINATION ${GEOTIFF_LIB_DIR}
-     PUBLIC_HEADER DESTINATION ${GEOTIFF_INCLUDE_DIR}
-     ARCHIVE DESTINATION ${GEOTIFF_LIB_DIR} )
+     RUNTIME DESTINATION ${CMAKE_INSTALLL_BINDIR}
+     LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
+     PUBLIC_HEADER DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}
+     ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR} )
 
 # Define grouping of source files in PROJECT file (e.g. Visual Studio)
 SOURCE_GROUP("CMake Files" FILES CMakeLists.txt)
diff --git a/bin/CMakeLists.txt b/bin/CMakeLists.txt
index dad465f..c61585c 100644
--- a/bin/CMakeLists.txt
+++ b/bin/CMakeLists.txt
@@ -41,6 +41,6 @@ MESSAGE(STATUS "Adding GeoTIFF utilities to build - done: ${GEOTIFF_UTILITIES}")
 # Targets installation
 
 INSTALL(TARGETS ${GEOTIFF_UTILITIES}
-    RUNTIME DESTINATION ${GEOTIFF_BIN_DIR}
-    LIBRARY DESTINATION ${GEOTIFF_LIB_DIR}
-    ARCHIVE DESTINATION ${GEOTIFF_LIB_DIR})
+    RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
+    LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
+    ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR})