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Handle absolute path in CMAKE_INSTALL_DATADIR

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Cmake accepts both absolute and relative paths in CMAKE_INSTALL_DATADIR.
For the latter case CMAKE_INSTALL_PREFIX is being prepended
automatically. %{rel_datadir} is derived from CMAKE_INSTALL_DATADIR
which was assumed to be relative and otherwise causes issues in a .pc
file where prefix is being prepended unconditionally.

Make sure %{rel_datadir} is relative by calculating RELATIVE_PATH from
CMAKE_INSTALL_PREFIX to CMAKE_INSTALL_FULL_DATADIR which is known to be
absolute.

Fixes #8150
This commit is contained in:
Jan Palus 2021-07-20 00:14:44 +02:00 committed by Fabian Homborg
parent b0dc72ee78
commit 0918653510
1 changed files with 1 additions and 1 deletions
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cmake/Install.cmake
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@ -14,8 +14,8 @@ set(bindir ${CMAKE_INSTALL_BINDIR})
set(sysconfdir ${CMAKE_INSTALL_SYSCONFDIR})
set(mandir ${CMAKE_INSTALL_MANDIR})
set(rel_datadir ${CMAKE_INSTALL_DATADIR})
set(datadir ${CMAKE_INSTALL_FULL_DATADIR})
file(RELATIVE_PATH rel_datadir ${CMAKE_INSTALL_PREFIX} ${datadir})
set(docdir ${CMAKE_INSTALL_DOCDIR})