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build: allow installing into the root directory (/)

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It turns out that CMake always canonicalizes `CMAKE_INSTALL_PREFIX` to
an absolute path--if it's a relative path, it canonicalizes it relative
to the build directory.  As a result, the only thing the DESTDIR and
relative directory check prevents is an installation into the root
directory since CMake strips the trailing slash, turning "/" into an
empty string.  Let's just remove the check all together, since it cannot
accomplish what we intended.
This commit is contained in:
John Szakmeister 2014-11-09 17:48:19 -05:00
parent 5714044617
commit 6e87557c08
1 changed files with 0 additions and 4 deletions
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4
cmake/InstallHelpers.cmake
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@ -22,10 +22,6 @@ function(create_install_dir_with_perms)
install(CODE
"
if(DEFINED ENV{DESTDIR} AND NOT IS_ABSOLUTE \${CMAKE_INSTALL_PREFIX})
message(FATAL_ERROR \"Install prefix must be absolute when using DESTDIR\")
endif()
set(_current_dir \"\${CMAKE_INSTALL_PREFIX}/${_install_dir_DESTINATION}\")
set(_dir_permissions \"${_install_dir_DIRECTORY_PERMISSIONS}\")