Cmake: Accept custom install dirs in various formats from command line.

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 49f2e75acc9e6d9070c4402ccff657a2160acff0..e365c03d9c2cfbacfd03f2228eecd3815cfec587 100644 (file)
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -36,12 +36,6 @@ message(STATUS "ZLIBNG_HEADER_VERSION: ${ZLIBNG_HEADER_VERSION}")
 
 project(zlib VERSION ${ZLIB_HEADER_VERSION} LANGUAGES C)
 
-set(BIN_INSTALL_DIR "${CMAKE_INSTALL_PREFIX}/bin" CACHE PATH "Installation directory for executables")
-set(LIB_INSTALL_DIR "${CMAKE_INSTALL_PREFIX}/lib" CACHE PATH "Installation directory for libraries")
-set(INC_INSTALL_DIR "${CMAKE_INSTALL_PREFIX}/include" CACHE PATH "Installation directory for headers")
-set(MAN_INSTALL_DIR "${CMAKE_INSTALL_PREFIX}/share/man" CACHE PATH "Installation directory for manual pages")
-set(PKGCONFIG_INSTALL_DIR "${LIB_INSTALL_DIR}/pkgconfig" CACHE PATH "Installation directory for pkgconfig (.pc) files")
-
 include(CheckTypeSize)
 include(CheckSymbolExists)
 include(CheckFunctionExists)
@@ -53,6 +47,7 @@ include(CMakeDependentOption)
 include(FeatureSummary)
 
 include(cmake/detect-arch.cmake)
+include(cmake/detect-install-dirs.cmake)
 include(cmake/detect-coverage.cmake)
 include(cmake/detect-sanitizer.cmake)
 

diff --git a/cmake/detect-install-dirs.cmake b/cmake/detect-install-dirs.cmake
new file mode 100644 (file)
index 0000000..4214954
--- /dev/null
+++ b/cmake/detect-install-dirs.cmake
@@ -0,0 +1,55 @@
+# detect-install-dirs.cmake -- Detect install directory parameters
+# Copyright (C) 2021 Hans Kristian Rosbach
+# Licensed under the Zlib license, see LICENSE.md for details
+
+# Determine installation directory for executables
+if (DEFINED BIN_INSTALL_DIR)
+    set(BIN_INSTALL_DIR "${BIN_INSTALL_DIR}" CACHE PATH "Installation directory for executables" FORCE)
+elseif (DEFINED INSTALL_BIN_DIR)
+    set(BIN_INSTALL_DIR "${INSTALL_BIN_DIR}" CACHE PATH "Installation directory for executables" FORCE)
+elseif (DEFINED CMAKE_INSTALL_FULL_BINDIR)
+    set(BIN_INSTALL_DIR "${CMAKE_INSTALL_FULL_BINDIR}" CACHE PATH "Installation directory for executables" FORCE)
+elseif (DEFINED CMAKE_INSTALL_BINDIR)
+    set(BIN_INSTALL_DIR "${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_BINDIR}" CACHE PATH "Installation directory for executables" FORCE)
+else()
+    set(BIN_INSTALL_DIR "${CMAKE_INSTALL_PREFIX}/bin" CACHE PATH "Installation directory for executables")
+endif()
+
+# Determine installation directory for libraries
+if (DEFINED LIB_INSTALL_DIR)
+    set(LIB_INSTALL_DIR "${LIB_INSTALL_DIR}" CACHE PATH "Installation directory for libraries" FORCE)
+elseif (DEFINED INSTALL_LIB_DIR)
+    set(LIB_INSTALL_DIR "${INSTALL_LIB_DIR}" CACHE PATH "Installation directory for libraries" FORCE)
+elseif (DEFINED CMAKE_INSTALL_FULL_LIBDIR)
+    set(LIB_INSTALL_DIR "${CMAKE_INSTALL_FULL_LIBDIR}" CACHE PATH "Installation directory for libraries" FORCE)
+elseif (DEFINED CMAKE_INSTALL_LIBDIR)
+    set(LIB_INSTALL_DIR "${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_LIBDIR}" CACHE PATH "Installation directory for libraries" FORCE)
+else()
+    set(LIB_INSTALL_DIR "${CMAKE_INSTALL_PREFIX}/lib" CACHE PATH "Installation directory for libraries")
+endif()
+
+# Determine installation directory for include files
+if (DEFINED INC_INSTALL_DIR)
+    set(INC_INSTALL_DIR "${INC_INSTALL_DIR}" CACHE PATH "Installation directory for headers" FORCE)
+elseif (DEFINED INSTALL_INC_DIR)
+    set(INC_INSTALL_DIR "${INSTALL_INC_DIR}" CACHE PATH "Installation directory for headers" FORCE)
+elseif (DEFINED CMAKE_INSTALL_FULL_INCDIR)
+    set(INC_INSTALL_DIR "${CMAKE_INSTALL_FULL_INCLUDEDIR}" CACHE PATH "Installation directory for headers" FORCE)
+elseif (DEFINED CMAKE_INSTALL_INCDIR)
+    set(INC_INSTALL_DIR "${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_INCLUDEDIR}" CACHE PATH "Installation directory for headers" FORCE)
+else()
+    set(INC_INSTALL_DIR "${CMAKE_INSTALL_PREFIX}/include" CACHE PATH "Installation directory for headers")
+endif()
+
+# Determine installation directory for pkgconfig files
+if (DEFINED PKGCONFIG_INSTALL_DIR)
+    set(PKGCONFIG_INSTALL_DIR "${PKGCONFIG_INSTALL_DIR}" CACHE PATH "Installation directory for pkgconfig (.pc) files" FORCE)
+elseif (DEFINED INSTALL_PKGCONFIG_DIR)
+    set(PKGCONFIG_INSTALL_DIR "${INSTALL_PKGCONFIG_DIR}" CACHE PATH "Installation directory for pkgconfig (.pc) files" FORCE)
+elseif (DEFINED CMAKE_INSTALL_FULL_PKGCONFIGDIR)
+    set(PKGCONFIG_INSTALL_DIR "${CMAKE_INSTALL_FULL_PKGCONFIGDIR}" CACHE PATH "Installation directory for pkgconfig (.pc) files" FORCE)
+elseif (DEFINED CMAKE_INSTALL_PKGCONFIGDIR)
+    set(PKGCONFIG_INSTALL_DIR "${LIB_INSTALL_DIR}/${CMAKE_INSTALL_PKGCONFIGDIR}" CACHE PATH "Installation directory for pkgconfig (.pc) files" FORCE)
+else()
+    set(PKGCONFIG_INSTALL_DIR "${LIB_INSTALL_DIR}/pkgconfig" CACHE PATH "Installation directory for pkgconfig (.pc) files")
+endif()