In several projects I've had a need to compute the "full" absolute path
for an installation directory. The logic to do this is in the
GNUInstallDirs module, used to compute the CMAKE_INSTALL_FULL_*
variables for each of the CMAKE_INSTALL_* cache variables it defines.
In order to allow for this logic to be reused, I've separated it out
into a macro "set_full_install_dir". This can then be used by any end
user to compute their own absolute paths using the same logic.
The reason for this is that my projects are creating their own
project-specific installation directory cache variables based upon the
GNUInstallDirs variables, or sometimes even from scratch. I then need
to compute the full path. But I need this macro to be able to do that
to match the GNUInstallDirs behaviour.
The macro name might need adjusting, but I hope the basic approach is OK
in principle.
Kind regards,
Roger
>From ed6301e40a8b5d71fb45b55a8ac2dbacb5804be7 Mon Sep 17 00:00:00 2001
From: Roger Leigh <rle...@codelibre.net>
Date: Sun, 28 Aug 2016 18:19:02 +0100
Subject: [PATCH] GNUInstallDirs: Add set_full_install_dir macro
---
Modules/GNUInstallDirs.cmake | 80 +++++++++++++++++++++++++++-----------------
1 file changed, 50 insertions(+), 30 deletions(-)
diff --git a/Modules/GNUInstallDirs.cmake b/Modules/GNUInstallDirs.cmake
index b42084e..50a6797 100644
--- a/Modules/GNUInstallDirs.cmake
+++ b/Modules/GNUInstallDirs.cmake
@@ -99,6 +99,22 @@
# `Filesystem Hierarchy Standard`_.
#
# .. _`Filesystem Hierarchy Standard`: https://refspecs.linuxfoundation.org/FHS_3.0/fhs/index.html
+#
+# Macros
+# ^^^^^^
+#
+# ::
+#
+# set_full_install_dir(fullvar var)
+#
+# Set the given variable ``fullvar`` to the absolute path contained
+# within the variable ``var``. This is to allow the computation of an
+# absolute path, accounting for all the special cases documented
+# above. While this macro is used to compute the various
+# ``CMAKE_INSTALL_FULL_<dir>`` variables, it is exposed publicly to
+# allow users who create additional path variables to also compute
+# absolute paths where necessary, using the same logic.
+#
#=============================================================================
# Copyright 2015 Alex Turbov <i.za...@gmail.com>
@@ -300,55 +316,59 @@ mark_as_advanced(
CMAKE_INSTALL_DOCDIR
)
-# Result directories
-#
-foreach(dir
- BINDIR
- SBINDIR
- LIBEXECDIR
- SYSCONFDIR
- SHAREDSTATEDIR
- LOCALSTATEDIR
- LIBDIR
- INCLUDEDIR
- OLDINCLUDEDIR
- DATAROOTDIR
- DATADIR
- INFODIR
- LOCALEDIR
- MANDIR
- DOCDIR
- )
- if(NOT IS_ABSOLUTE "${CMAKE_INSTALL_${dir}}")
+macro(set_full_install_dir fullvar var)
+ if(NOT IS_ABSOLUTE "${${var}}")
# Handle special cases:
# - CMAKE_INSTALL_PREFIX == /
# - CMAKE_INSTALL_PREFIX == /usr
# - CMAKE_INSTALL_PREFIX == /opt/...
if("${CMAKE_INSTALL_PREFIX}" STREQUAL "/")
if("${dir}" STREQUAL "SYSCONFDIR" OR "${dir}" STREQUAL "LOCALSTATEDIR")
- set(CMAKE_INSTALL_FULL_${dir} "/${CMAKE_INSTALL_${dir}}")
+ set(${fullvar} "/${${var}}")
else()
- if (NOT "${CMAKE_INSTALL_${dir}}" MATCHES "^usr/")
- set(CMAKE_INSTALL_${dir} "usr/${CMAKE_INSTALL_${dir}}")
+ if (NOT "${${var}}" MATCHES "^usr/")
+ set(${var} "usr/${${var}}")
endif()
- set(CMAKE_INSTALL_FULL_${dir} "/${CMAKE_INSTALL_${dir}}")
+ set(${fullvar} "/${${var}}")
endif()
elseif("${CMAKE_INSTALL_PREFIX}" MATCHES "^/usr/?$")
if("${dir}" STREQUAL "SYSCONFDIR" OR "${dir}" STREQUAL "LOCALSTATEDIR")
- set(CMAKE_INSTALL_FULL_${dir} "/${CMAKE_INSTALL_${dir}}")
+ set(${fullvar} "/${${var}}")
else()
- set(CMAKE_INSTALL_FULL_${dir} "${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_${dir}}")
+ set(${fullvar} "${CMAKE_INSTALL_PREFIX}/${${var}}")
endif()
elseif("${CMAKE_INSTALL_PREFIX}" MATCHES "^/opt/.*")
if("${dir}" STREQUAL "SYSCONFDIR" OR "${dir}" STREQUAL "LOCALSTATEDIR")
- set(CMAKE_INSTALL_FULL_${dir} "/${CMAKE_INSTALL_${dir}}${CMAKE_INSTALL_PREFIX}")
+ set(${fullvar} "/${${var}}${CMAKE_INSTALL_PREFIX}")
else()
- set(CMAKE_INSTALL_FULL_${dir} "${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_${dir}}")
+ set(${fullvar} "${CMAKE_INSTALL_PREFIX}/${${var}}")
endif()
else()
- set(CMAKE_INSTALL_FULL_${dir} "${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_${dir}}")
+ set(${fullvar} "${CMAKE_INSTALL_PREFIX}/${${var}}")
endif()
else()
- set(CMAKE_INSTALL_FULL_${dir} "${CMAKE_INSTALL_${dir}}")
+ set(${fullvar} "${${var}}")
endif()
+endmacro()
+
+# Result directories
+#
+foreach(dir
+ BINDIR
+ SBINDIR
+ LIBEXECDIR
+ SYSCONFDIR
+ SHAREDSTATEDIR
+ LOCALSTATEDIR
+ LIBDIR
+ INCLUDEDIR
+ OLDINCLUDEDIR
+ DATAROOTDIR
+ DATADIR
+ INFODIR
+ LOCALEDIR
+ MANDIR
+ DOCDIR
+ )
+ set_full_install_dir(CMAKE_INSTALL_FULL_${dir} CMAKE_INSTALL_${dir})
endforeach()
--
2.7.4
--
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