Use standard CMake variable names for installation paths

Rename INSTALL_INC and INSTALL_BIN to INCLUDE_INSTALL_DIR and
BIN_INSTALL_DIR, which are more commonly used. This is also
consistent with the variable for the library path which is
already LIB_INSTALL_DIR.

CMakeLists.txt

@@ -66,9 +66,9 @@ ELSE (ZLIB_FOUND)
 ENDIF()
 
 # Installation paths
-SET(INSTALL_BIN bin CACHE PATH "Where to install binaries to.")
+SET(BIN_INSTALL_DIR bin CACHE PATH "Where to install binaries to.")
 SET(LIB_INSTALL_DIR lib CACHE PATH "Where to install libraries to.")
-SET(INSTALL_INC include CACHE PATH "Where to install headers to.")
+SET(INCLUDE_INSTALL_DIR include CACHE PATH "Where to install headers to.")
 
 # Build options
 OPTION (BUILD_SHARED_LIBS "Build Shared Library (OFF for Static)" ON)
@@ -170,13 +170,13 @@ ENDIF()
 
 # Install
 INSTALL(TARGETS git2
-	RUNTIME DESTINATION ${INSTALL_BIN}
+	RUNTIME DESTINATION ${BIN_INSTALL_DIR}
 	LIBRARY DESTINATION ${LIB_INSTALL_DIR}
 	ARCHIVE DESTINATION ${LIB_INSTALL_DIR}
 )
 INSTALL(FILES ${CMAKE_CURRENT_BINARY_DIR}/libgit2.pc DESTINATION ${LIB_INSTALL_DIR}/pkgconfig )
-INSTALL(DIRECTORY include/git2 DESTINATION ${INSTALL_INC} )
-INSTALL(FILES include/git2.h DESTINATION ${INSTALL_INC} )
+INSTALL(DIRECTORY include/git2 DESTINATION ${INCLUDE_INSTALL_DIR} )
+INSTALL(FILES include/git2.h DESTINATION ${INCLUDE_INSTALL_DIR} )
 
 # Tests
 IF (BUILD_CLAR)

README.md

@@ -66,9 +66,9 @@ For more advanced use or questions about CMake please read <http://www.cmake.org
 
 The following CMake variables are declared:
 
-- `INSTALL_BIN`: Where to install binaries to.
+- `BIN_INSTALL_DIR`: Where to install binaries to.
 - `LIB_INSTALL_DIR`: Where to install libraries to.
-- `INSTALL_INC`: Where to install headers to.
+- `INCLUDE_INSTALL_DIR`: Where to install headers to.
 - `BUILD_SHARED_LIBS`: Build libgit2 as a Shared Library (defaults to ON)
 - `BUILD_CLAR`: Build [Clar](https://github.com/tanoku/clar)-based test suite (defaults to ON)
 - `THREADSAFE`: Build libgit2 with threading support (defaults to OFF)

libgit2.pc.in

 libdir=@CMAKE_INSTALL_PREFIX@/@LIB_INSTALL_DIR@
-includedir=@CMAKE_INSTALL_PREFIX@/@INSTALL_INC@
+includedir=@CMAKE_INSTALL_PREFIX@/@INCLUDE_INSTALL_DIR@
 
 Name: libgit2
 Description: The git library, take 2