Merge branch 'revert-debian-libexec' into release-3.19

Merge-request: !6607

Modules/GNUInstallDirs.cmake

@@ -167,6 +167,8 @@ _GNUInstallDirs_cache_path(CMAKE_INSTALL_BINDIR "bin"
   "User executables (bin)")
 _GNUInstallDirs_cache_path(CMAKE_INSTALL_SBINDIR "sbin"
   "System admin executables (sbin)")
+_GNUInstallDirs_cache_path(CMAKE_INSTALL_LIBEXECDIR "libexec"
+  "Program executables (libexec)")
 _GNUInstallDirs_cache_path(CMAKE_INSTALL_SYSCONFDIR "etc"
   "Read-only single-machine data (etc)")
 _GNUInstallDirs_cache_path(CMAKE_INSTALL_SHAREDSTATEDIR "com"
@@ -260,19 +262,6 @@ set(_GNUInstallDirs_LAST_CMAKE_INSTALL_PREFIX "${CMAKE_INSTALL_PREFIX}" CACHE IN
 unset(_libdir_set)
 unset(__LAST_LIBDIR_DEFAULT)
 
-if(CMAKE_SYSTEM_NAME MATCHES "^(Linux|kFreeBSD|GNU)$"
-    AND NOT CMAKE_CROSSCOMPILING
-    AND NOT EXISTS "/etc/arch-release"
-    AND EXISTS "/etc/debian_version" # is this a debian system ?
-    AND "${CMAKE_INSTALL_PREFIX}" MATCHES "^/usr/?$")
-  # see https://refspecs.linuxfoundation.org/FHS_3.0/fhs-3.0.html#usrlibexec
-  # and https://www.debian.org/doc/debian-policy/ch-opersys#file-system-structure (section 9.1.1 bullet point 4)
-  _GNUInstallDirs_cache_path(CMAKE_INSTALL_LIBEXECDIR "${CMAKE_INSTALL_LIBDIR}"
-    "Program executables (${CMAKE_INSTALL_LIBDIR})")
-else()
-  _GNUInstallDirs_cache_path(CMAKE_INSTALL_LIBEXECDIR "libexec"
-    "Program executables (libexec)")
-endif()
 _GNUInstallDirs_cache_path(CMAKE_INSTALL_INCLUDEDIR "include"
   "C header files (include)")
 _GNUInstallDirs_cache_path(CMAKE_INSTALL_OLDINCLUDEDIR "/usr/include"

Tests/RunCMake/GNUInstallDirs/Usr-Debian-stderr.txt

@@ -5,7 +5,7 @@ CMAKE_INSTALL_DOCDIR='share/doc/Usr'
 CMAKE_INSTALL_INCLUDEDIR='include'
 CMAKE_INSTALL_INFODIR='share/info'
 CMAKE_INSTALL_LIBDIR='lib/arch'
-CMAKE_INSTALL_LIBEXECDIR='lib/arch'
+CMAKE_INSTALL_LIBEXECDIR='libexec'
 CMAKE_INSTALL_LOCALEDIR='share/locale'
 CMAKE_INSTALL_LOCALSTATEDIR='var'
 CMAKE_INSTALL_RUNSTATEDIR='var/run'
@@ -20,7 +20,7 @@ CMAKE_INSTALL_FULL_DOCDIR='/usr/share/doc/Usr'
 CMAKE_INSTALL_FULL_INCLUDEDIR='/usr/include'
 CMAKE_INSTALL_FULL_INFODIR='/usr/share/info'
 CMAKE_INSTALL_FULL_LIBDIR='/usr/lib/arch'
-CMAKE_INSTALL_FULL_LIBEXECDIR='/usr/lib/arch'
+CMAKE_INSTALL_FULL_LIBEXECDIR='/usr/libexec'
 CMAKE_INSTALL_FULL_LOCALEDIR='/usr/share/locale'
 CMAKE_INSTALL_FULL_LOCALSTATEDIR='/var'
 CMAKE_INSTALL_FULL_RUNSTATEDIR='/var/run'