From e42c088333a16b76a6bacd49e4bcdbdcb2f942ca Mon Sep 17 00:00:00 2001
From: Andreas Sturmlechner <asturm@gentoo.org>
Date: Sun, 28 Sep 2025 21:12:53 +0200
Subject: [PATCH] Use GNUInstallDirs

Mostly slotting in easily.

Signed-off-by: Andreas Sturmlechner <asturm@gentoo.org>
---
 cmake/modules/instdirs.cmake | 40 +++---------------------------------
 examples/CMakeLists.txt      |  4 ++--
 2 files changed, 5 insertions(+), 39 deletions(-)

diff --git a/cmake/modules/instdirs.cmake b/cmake/modules/instdirs.cmake
index 3eb0290..c130551 100644
--- a/cmake/modules/instdirs.cmake
+++ b/cmake/modules/instdirs.cmake
@@ -12,48 +12,14 @@
 # CMAKE_INSTALL_OLDINCLUDEDIR not set because libLASi does not use those
 # install locations).
 
+include(GNUInstallDirs)
+
 set(
 CMAKE_INSTALL_EXEC_PREFIX 
 ${CMAKE_INSTALL_PREFIX}
 CACHE PATH "install location for architecture-dependent files"
 )
 
-set(
-CMAKE_INSTALL_BINDIR
-${CMAKE_INSTALL_EXEC_PREFIX}/bin
-CACHE PATH "install location for user executables"
-)
-
-set(
-CMAKE_INSTALL_DATADIR
-${CMAKE_INSTALL_PREFIX}/share
-CACHE PATH "install location for read-only architecture-independent data"
-)
-
-set(
-CMAKE_INSTALL_LIBDIR
-${CMAKE_INSTALL_EXEC_PREFIX}/lib
-CACHE PATH "install location for object code libraries"
-)
-
-set(
-CMAKE_INSTALL_INCLUDEDIR
-${CMAKE_INSTALL_PREFIX}/include
-CACHE PATH "install location for C header files"
-)
-
-set(
-CMAKE_INSTALL_INFODIR
-${CMAKE_INSTALL_DATADIR}/info
-CACHE PATH "install location for info documentation"
-)
-
-set(
-CMAKE_INSTALL_MANDIR
-${CMAKE_INSTALL_DATADIR}/man
-CACHE PATH "install location for man documentation"
-)
-
 # These cached default PATHS are derived from those above and
 # are the ones actually used by the libLASi build system.
 set(prefix ${CMAKE_INSTALL_PREFIX}
@@ -76,7 +42,7 @@ set(includedir ${CMAKE_INSTALL_INCLUDEDIR}
 CACHE PATH "install location for headers"
 )
 
-set(docdir ${CMAKE_INSTALL_DATADIR}/doc/libLASi-${VERSION}
+set(docdir ${CMAKE_INSTALL_DOCDIR}
 CACHE PATH "install location for documentation"
 )
 
diff --git a/examples/CMakeLists.txt b/examples/CMakeLists.txt
index bc963b0..5707826 100644
--- a/examples/CMakeLists.txt
+++ b/examples/CMakeLists.txt
@@ -90,7 +90,7 @@ install(FILES
   MissingGlyphExample.png
   SimpleLASiExample.png
   ComplexTextLayoutExample.png
-  DESTINATION ${DATA_DIR}/examples
+  DESTINATION ${CMAKE_INSTALL_DOCDIR}/examples
   )
 
 # Sort out RPATH issues for build of installed examples.
@@ -114,6 +114,6 @@ ${CMAKE_CURRENT_BINARY_DIR}/Makefile.examples
 )
 
 install(FILES ${CMAKE_CURRENT_BINARY_DIR}/Makefile.examples
-DESTINATION ${DATA_DIR}/examples
+DESTINATION ${CMAKE_INSTALL_DOCDIR}/examples
 RENAME Makefile
 )
-- 
2.51.0