Add option to control 'bin' directory of CMake's own installation (#16076)

Add a `CMAKE_BIN_DIR` cache entry to CMake's own build configuration.
Add a `--bindir` option to the `bootstrap` script to set it.

1 files changed, 5 insertions, 0 deletions

diff --git a/Source/CMakeInstallDestinations.cmake b/Source/CMakeInstallDestinations.cmake
index 2f9d95a..023f6c0 100644
--- a/Source/CMakeInstallDestinations.cmake
+++ b/Source/CMakeInstallDestinations.cmake
@@ -1,27 +1,32 @@
 # Keep formatting here consistent with bootstrap script expectations.
 if(BEOS)
+  set(CMAKE_BIN_DIR_DEFAULT "bin") # HAIKU
   set(CMAKE_DATA_DIR_DEFAULT "share/cmake-${CMake_VERSION_MAJOR}.${CMake_VERSION_MINOR}") # HAIKU
   set(CMAKE_MAN_DIR_DEFAULT "documentation/man") # HAIKU
   set(CMAKE_DOC_DIR_DEFAULT "documentation/doc/cmake-${CMake_VERSION_MAJOR}.${CMake_VERSION_MINOR}") # HAIKU
   set(CMAKE_XDGDATA_DIR_DEFAULT "share") # HAIKU
 elseif(CYGWIN)
+  set(CMAKE_BIN_DIR_DEFAULT "bin") # CYGWIN
   set(CMAKE_DATA_DIR_DEFAULT "share/cmake-${CMake_VERSION}") # CYGWIN
   set(CMAKE_DOC_DIR_DEFAULT "share/doc/cmake-${CMake_VERSION}") # CYGWIN
   set(CMAKE_MAN_DIR_DEFAULT "share/man") # CYGWIN
   set(CMAKE_XDGDATA_DIR_DEFAULT "share") # CYGWIN
 else()
+  set(CMAKE_BIN_DIR_DEFAULT "bin") # OTHER
   set(CMAKE_DATA_DIR_DEFAULT "share/cmake-${CMake_VERSION_MAJOR}.${CMake_VERSION_MINOR}") # OTHER
   set(CMAKE_DOC_DIR_DEFAULT "doc/cmake-${CMake_VERSION_MAJOR}.${CMake_VERSION_MINOR}") # OTHER
   set(CMAKE_MAN_DIR_DEFAULT "man") # OTHER
   set(CMAKE_XDGDATA_DIR_DEFAULT "share") # OTHER
 endif()
 
+set(CMAKE_BIN_DIR_DESC "bin")
 set(CMAKE_DATA_DIR_DESC "data")
 set(CMAKE_DOC_DIR_DESC "docs")
 set(CMAKE_MAN_DIR_DESC "man pages")
 set(CMAKE_XDGDATA_DIR_DESC "XDG specific files")
 
 foreach(v
+    CMAKE_BIN_DIR
     CMAKE_DATA_DIR
     CMAKE_DOC_DIR
     CMAKE_MAN_DIR