cmake: Add CMake variable to cache only when gflags is not a subproject
This change allows the user to include the gflags project as subtree/
submodule in their own project. In this case, no CMake variables used
to configure the build and installation of the gflags library should be
added to the CMake cache.
diff --git a/CMakeLists.txt b/CMakeLists.txt
index e479f51..bd81648 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,3 +1,65 @@
+## CMake configuration file of gflags project
+##
+## This CMakeLists.txt defines some gflags specific configuration variables
+## using the "gflags_define" utility macro. The default values of these variables
+## can be overridden either on the CMake command-line using the -D option of
+## the cmake command or in a super-project which includes the gflags source
+## tree by setting the GFLAGS_<varname> CMake variables before adding the
+## gflags source directory via CMake's "add_subdirectory" command. Only when
+## the non-cached variable GFLAGS_IS_SUBPROJECT has a value equivalent to FALSE,
+## these configuration variables are added to the CMake cache so they can be
+## edited in the CMake GUI. By default, GFLAGS_IS_SUBPROJECT is set to TRUE when
+## the CMAKE_SOURCE_DIR is not identical to the directory of this CMakeLists.txt
+## file, i.e., the top-level directory of the gflags project source tree.
+##
+## When this project is a subproject (GFLAGS_IS_SUBPROJECT is TRUE), the default
+## settings are such that only the static single-threaded library is built without
+## installation of the gflags files. The "gflags" target is in this case an ALIAS
+## library target for the "gflags_nothreads-static" library target. Targets which
+## depend on the gflags library should link to the "gflags" library target.
+##
+## Example CMakeLists.txt of user project which requires separate gflags installation:
+## cmake_minimum_required(VERSION 2.8.12 FATAL_ERROR)
+##
+## project(Foo)
+##
+## find_package(gflags REQUIRED)
+##
+## add_executable(foo src/foo.cc)
+## target_link_libraries(foo gflags)
+##
+## Example CMakeLists.txt of super-project which contains gflags source tree:
+## cmake_minimum_required(VERSION 2.8.12 FATAL_ERROR)
+##
+## project(Foo)
+##
+## add_subdirectory(gflags)
+##
+## add_executable(foo src/foo.cc)
+## target_link_libraries(foo gflags)
+##
+## Variables to configure the source files:
+## - GFLAGS_IS_A_DLL
+## - GFLAGS_NAMESPACE
+## - GFLAGS_ATTRIBUTE_UNUSED
+## - GFLAGS_INTTYPES_FORMAT
+##
+## Variables to configure the build:
+## - GFLAGS_SOVERSION
+## - GFLAGS_BUILD_SHARED_LIBS
+## - GFLAGS_BUILD_STATIC_LIBS
+## - GFLAGS_BUILD_gflags_LIB
+## - GFLAGS_BUILD_gflags_nothreads_LIB
+## - GFLAGS_BUILD_TESTING
+## - GFLAGS_BUILD_PACKAGING
+##
+## Variables to configure the installation:
+## - GFLAGS_INCLUDE_DIR
+## - GFLAGS_LIBRARY_INSTALL_DIR or LIB_INSTALL_DIR or LIB_SUFFIX
+## - GFLAGS_INSTALL_HEADERS
+## - GFLAGS_INSTALL_SHARED_LIBS
+## - GFLAGS_INSTALL_STATIC_LIBS
+
cmake_minimum_required (VERSION 2.8.12 FATAL_ERROR)
if (POLICY CMP0042)
@@ -34,17 +96,36 @@
PACKAGE_VERSION_PATCH
)
-set (PACKAGE_SOVERSION "${PACKAGE_VERSION_MAJOR}")
+# shared library ABI version number, can be overridden by package maintainers
+# using -DGFLAGS_SOVERSION=XXX on the command-line
+if (GFLAGS_SOVERSION)
+ set (PACKAGE_SOVERSION "${GFLAGS_SOVERSION}")
+else ()
+ set (PACKAGE_SOVERSION "${PACKAGE_VERSION_MAJOR}")
+endif ()
+
+# when gflags is included as subproject (e.g., as Git submodule/subtree) in the source
+# tree of a project that uses it, no variables should be added to the CMake cache;
+# users may set the non-cached variable GFLAGS_IS_SUBPROJECT before add_subdirectory(gflags)
+if (NOT DEFINED GFLAGS_IS_SUBPROJECT)
+ if ("^${CMAKE_SOURCE_DIR}$" STREQUAL "^${PROJECT_SOURCE_DIR}$")
+ set (GFLAGS_IS_SUBPROJECT FALSE)
+ else ()
+ set (GFLAGS_IS_SUBPROJECT TRUE)
+ endif ()
+endif ()
+
+# prefix for package variables in CMake configuration file
+string (TOUPPER "${PACKAGE_NAME}" PACKAGE_PREFIX)
# ----------------------------------------------------------------------------
# options
-if (NOT GFLAGS_NAMESPACE)
- # maintain binary backwards compatibility with gflags library version <= 2.0,
- # but at the same time enable the use of the preferred new "gflags" namespace
- set (GFLAGS_NAMESPACE "google;${PACKAGE_NAME}" CACHE STRING "Name(s) of library namespace (separate multiple options by semicolon)")
- mark_as_advanced (GFLAGS_NAMESPACE)
-endif ()
-set (GFLAGS_NAMESPACE_SECONDARY "${GFLAGS_NAMESPACE}")
+
+# maintain binary backwards compatibility with gflags library version <= 2.0,
+# but at the same time enable the use of the preferred new "gflags" namespace
+gflags_define (STRING NAMESPACE "Name(s) of library namespace (separate multiple options by semicolon)" "google;${PACKAGE_NAME}" "${PACKAGE_NAME}")
+gflags_property (NAMESPACE ADVANCED TRUE)
+set (GFLAGS_NAMESPACE_SECONDARY "${NAMESPACE}")
list (REMOVE_DUPLICATES GFLAGS_NAMESPACE_SECONDARY)
if (NOT GFLAGS_NAMESPACE_SECONDARY)
message (FATAL_ERROR "GFLAGS_NAMESPACE must be set to one (or more) valid C++ namespace identifier(s separated by semicolon \";\").")
@@ -57,46 +138,54 @@
list (GET GFLAGS_NAMESPACE_SECONDARY 0 GFLAGS_NAMESPACE)
list (REMOVE_AT GFLAGS_NAMESPACE_SECONDARY 0)
-option (BUILD_SHARED_LIBS "Request build of shared libraries." OFF)
-option (BUILD_STATIC_LIBS "Request build of static libraries (default if BUILD_SHARED_LIBS is OFF)." OFF)
-option (BUILD_gflags_LIB "Request build of the multi-threaded gflags library." ON)
-option (BUILD_gflags_nothreads_LIB "Request build of the single-threaded gflags library." ON)
-option (BUILD_PACKAGING "Enable build of distribution packages using CPack." OFF)
-option (BUILD_TESTING "Enable build of the unit tests and their execution using CTest." OFF)
-option (INSTALL_HEADERS "Request packaging of headers and other development files." ON)
+# cached build options when gflags is not a subproject, otherwise non-cached CMake variables
+# usage: gflags_define(BOOL <name> <doc> <default> [<subproject default>])
+gflags_define (BOOL BUILD_SHARED_LIBS "Request build of shared libraries." OFF OFF)
+gflags_define (BOOL BUILD_STATIC_LIBS "Request build of static libraries (default if BUILD_SHARED_LIBS is OFF)." OFF ON)
+gflags_define (BOOL BUILD_gflags_LIB "Request build of the multi-threaded gflags library." ON OFF)
+gflags_define (BOOL BUILD_gflags_nothreads_LIB "Request build of the single-threaded gflags library." ON ON)
+gflags_define (BOOL BUILD_PACKAGING "Enable build of distribution packages using CPack." OFF OFF)
+gflags_define (BOOL BUILD_TESTING "Enable build of the unit tests and their execution using CTest." OFF OFF)
+gflags_define (BOOL INSTALL_HEADERS "Request installation of headers and other development files." ON OFF)
+gflags_define (BOOL INSTALL_SHARED_LIBS "Request installation of shared libraries." ON ON)
+gflags_define (BOOL INSTALL_STATIC_LIBS "Request installation of static libraries." ON OFF)
-mark_as_advanced (CLEAR CMAKE_INSTALL_PREFIX)
-mark_as_advanced (CMAKE_CONFIGURATION_TYPES
- BUILD_STATIC_LIBS
- INSTALL_HEADERS)
-if (APPLE)
- mark_as_advanced(CMAKE_OSX_ARCHITECTURES
- CMAKE_OSX_DEPLOYMENT_TARGET
- CMAKE_OSX_SYSROOT)
-endif ()
+gflags_property (BUILD_STATIC_LIBS ADVANCED TRUE)
+gflags_property (INSTALL_HEADERS ADVANCED TRUE)
+gflags_property (INSTALL_SHARED_LIBS ADVANCED TRUE)
+gflags_property (INSTALL_STATIC_LIBS ADVANCED TRUE)
+
+if (NOT GFLAGS_IS_SUBPROJECT)
+ foreach (varname IN ITEMS CMAKE_INSTALL_PREFIX)
+ gflags_property (${varname} ADVANCED FALSE)
+ endforeach ()
+ foreach (varname IN ITEMS CMAKE_CONFIGURATION_TYPES CMAKE_OSX_ARCHITECTURES CMAKE_OSX_DEPLOYMENT_TARGET CMAKE_OSX_SYSROOT)
+ gflags_property (${varname} ADVANCED TRUE)
+ endforeach ()
+ if (NOT CMAKE_BUILD_TYPE AND NOT CMAKE_CXX_FLAGS)
+ gflags_set (CMAKE_BUILD_TYPE Release)
+ endif ()
+ if (CMAKE_CONFIGURATION_TYPES)
+ gflags_property (CMAKE_BUILD_TYPE STRINGS "${CMAKE_CONFIGURATION_TYPES}")
+ endif ()
+endif () # NOT GFLAGS_IS_SUBPROJECT
if (NOT BUILD_SHARED_LIBS AND NOT BUILD_STATIC_LIBS)
set (BUILD_STATIC_LIBS ON)
endif ()
if (NOT BUILD_gflags_LIB AND NOT BUILD_gflags_nothreads_LIB)
- message (FATAL_ERROR "At least one of BUILD_gflags_LIB and BUILD_gflags_nothreads_LIB must be ON.")
+ message (FATAL_ERROR "At least one of [GFLAGS_]BUILD_gflags_LIB and [GFLAGS_]BUILD_gflags_nothreads_LIB must be ON.")
endif ()
-if (NOT CMAKE_BUILD_TYPE AND NOT CMAKE_CXX_FLAGS)
- set_property (CACHE CMAKE_BUILD_TYPE PROPERTY VALUE Release)
+gflags_define (STRING INCLUDE_DIR "Name of include directory of installed header files relative to CMAKE_INSTALL_PREFIX/include/" "${PACKAGE_NAME}")
+gflags_property (INCLUDE_DIR ADVANCED TRUE)
+if (IS_ABSOLUTE INCLUDE_DIR)
+ message (FATAL_ERROR "[GFLAGS_]INCLUDE_DIR must be a path relative to CMAKE_INSTALL_PREFIX/include/")
endif ()
-
-if (NOT GFLAGS_INCLUDE_DIR)
- set (GFLAGS_INCLUDE_DIR "${PACKAGE_NAME}" CACHE STRING "Name of include directory of installed header files")
- mark_as_advanced (GFLAGS_INCLUDE_DIR)
-else ()
- if (IS_ABSOLUTE GFLAGS_INCLUDE_DIR)
- message (FATAL_ERROR "GFLAGS_INCLUDE_DIR must be a path relative to CMAKE_INSTALL_PREFIX/include")
- endif ()
- if (GFLAGS_INCLUDE_DIR MATCHES "^\\.\\.[/\\]")
- message (FATAL_ERROR "GFLAGS_INCLUDE_DIR must not start with parent directory reference (../)")
- endif ()
+if (INCLUDE_DIR MATCHES "^\\.\\.[/\\]")
+ message (FATAL_ERROR "[GFLAGS_]INCLUDE_DIR must not start with parent directory reference (../)")
endif ()
+set (GFLAGS_INCLUDE_DIR "${INCLUDE_DIR}")
# ----------------------------------------------------------------------------
# system checks
@@ -135,10 +224,10 @@
endif ()
endif ()
-set (GFLAGS_INTTYPES_FORMAT "" CACHE STRING "Format of integer types: \"C99\" (uint32_t), \"BSD\" (u_int32_t), \"VC7\" (__int32)")
-set_property (CACHE GFLAGS_INTTYPES_FORMAT PROPERTY STRINGS "C99;BSD;VC7")
-mark_as_advanced (GFLAGS_INTTYPES_FORMAT)
-if (NOT GFLAGS_INTTYPES_FORMAT)
+gflags_define (STRING INTTYPES_FORMAT "Format of integer types: \"C99\" (uint32_t), \"BSD\" (u_int32_t), \"VC7\" (__int32)" "")
+gflags_property (INTTYPES_FORMAT STRINGS "C99;BSD;VC7")
+gflags_property (INTTYPES_FORMAT ADVANCED TRUE)
+if (NOT INTTYPES_FORMAT)
set (TYPES uint32_t u_int32_t)
if (MSVC)
list (INSERT TYPES 0 __int32)
@@ -150,29 +239,30 @@
endif ()
endforeach ()
if (HAVE_uint32_t)
- set_property (CACHE GFLAGS_INTTYPES_FORMAT PROPERTY VALUE C99)
+ gflags_set (INTTYPES_FORMAT C99)
elseif (HAVE_u_int32_t)
- set_property (CACHE GFLAGS_INTTYPES_FORMAT PROPERTY VALUE BSD)
+ gflags_set (INTTYPES_FORMAT BSD)
elseif (HAVE___int32)
- set_property (CACHE GFLAGS_INTTYPES_FORMAT PROPERTY VALUE VC7)
+ gflags_set (INTTYPES_FORMAT VC7)
else ()
- mark_as_advanced (CLEAR GFLAGS_INTTYPES_FORMAT)
+ gflags_property (INTTYPES_FORMAT ADVANCED FALSE)
message (FATAL_ERROR "Do not know how to define a 32-bit integer quantity on your system!"
" Neither uint32_t, u_int32_t, nor __int32 seem to be available."
- " Set GFLAGS_INTTYPES_FORMAT to either C99, BSD, or VC7 and try again.")
+ " Set [GFLAGS_]INTTYPES_FORMAT to either C99, BSD, or VC7 and try again.")
endif ()
endif ()
# use of special characters in strings to circumvent bug #0008226
-if ("^${GFLAGS_INTTYPES_FORMAT}$" STREQUAL "^WIN$")
- set_property (CACHE GFLAGS_INTTYPES_FORMAT PROPERTY VALUE VC7)
+if ("^${INTTYPES_FORMAT}$" STREQUAL "^WIN$")
+ gflags_set (INTTYPES_FORMAT VC7)
endif ()
-if (NOT GFLAGS_INTTYPES_FORMAT MATCHES "^(C99|BSD|VC7)$")
- message (FATAL_ERROR "Invalid value for GFLAGS_INTTYPES_FORMAT! Choose one of \"C99\", \"BSD\", or \"VC7\"")
+if (NOT INTTYPES_FORMAT MATCHES "^(C99|BSD|VC7)$")
+ message (FATAL_ERROR "Invalid value for [GFLAGS_]INTTYPES_FORMAT! Choose one of \"C99\", \"BSD\", or \"VC7\"")
endif ()
+set (GFLAGS_INTTYPES_FORMAT "${INTTYPES_FORMAT}")
set (GFLAGS_INTTYPES_FORMAT_C99 0)
set (GFLAGS_INTTYPES_FORMAT_BSD 0)
set (GFLAGS_INTTYPES_FORMAT_VC7 0)
-set ("GFLAGS_INTTYPES_FORMAT_${GFLAGS_INTTYPES_FORMAT}" 1)
+set ("GFLAGS_INTTYPES_FORMAT_${INTTYPES_FORMAT}" 1)
if (MSVC)
set (HAVE_strtoll 0)
@@ -184,26 +274,29 @@
endif ()
endif ()
-set (CMAKE_THREAD_PREFER_PTHREAD TRUE)
-find_package (Threads)
-if (Threads_FOUND AND CMAKE_USE_PTHREADS_INIT)
- set (HAVE_PTHREAD 1)
- check_type_size (pthread_rwlock_t RWLOCK LANGUAGE CXX)
+if (BUILD_gflags_LIB)
+ set (CMAKE_THREAD_PREFER_PTHREAD TRUE)
+ find_package (Threads)
+ if (Threads_FOUND AND CMAKE_USE_PTHREADS_INIT)
+ set (HAVE_PTHREAD 1)
+ check_type_size (pthread_rwlock_t RWLOCK LANGUAGE CXX)
+ else ()
+ set (HAVE_PTHREAD 0)
+ endif ()
+ if (UNIX AND NOT HAVE_PTHREAD)
+ if (CMAKE_HAVE_PTHREAD_H)
+ set (what "library")
+ else ()
+ set (what ".h file")
+ endif ()
+ message (FATAL_ERROR "Could not find pthread${what}. Check the log file"
+ "\n\t${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log"
+ "\nor disable the build of the multi-threaded gflags library (BUILD_gflags_LIB=OFF).")
+ endif ()
else ()
set (HAVE_PTHREAD 0)
endif ()
-if (UNIX AND NOT HAVE_PTHREAD AND BUILD_gflags_LIB)
- if (CMAKE_HAVE_PTHREAD_H)
- set (what "library")
- else ()
- set (what ".h file")
- endif ()
- message (FATAL_ERROR "Could not find pthread${what}. Check the log file"
- "\n\t${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log"
- "\nor disable the build of the multi-threaded gflags library (BUILD_gflags_LIB=OFF).")
-endif ()
-
# ----------------------------------------------------------------------------
# source files - excluding root subdirectory and/or .in suffix
set (PUBLIC_HDRS
@@ -244,19 +337,23 @@
# ----------------------------------------------------------------------------
# configure source files
-if (CMAKE_COMPILER_IS_GNUCXX)
- set (GFLAGS_ATTRIBUTE_UNUSED "__attribute((unused))")
-else ()
- set (GFLAGS_ATTRIBUTE_UNUSED)
+if (NOT DEFINED GFLAGS_ATTRIBUTE_UNUSED)
+ if (CMAKE_COMPILER_IS_GNUCXX)
+ set (GFLAGS_ATTRIBUTE_UNUSED "__attribute((unused))")
+ else ()
+ set (GFLAGS_ATTRIBUTE_UNUSED)
+ endif ()
endif ()
# whenever we build a shared library (DLL on Windows), configure the public
# headers of the API for use of this library rather than the optionally
# also build statically linked library; users can override GFLAGS_DLL_DECL
-if (BUILD_SHARED_LIBS)
- set (GFLAGS_IS_A_DLL 1)
-else ()
- set (GFLAGS_IS_A_DLL 0)
+if (NOT DEFINED GFLAGS_IS_A_DLL)
+ if (BUILD_SHARED_LIBS)
+ set (GFLAGS_IS_A_DLL 1)
+ else ()
+ set (GFLAGS_IS_A_DLL 0)
+ endif ()
endif ()
configure_headers (PUBLIC_HDRS ${PUBLIC_HDRS})
@@ -265,9 +362,11 @@
# ----------------------------------------------------------------------------
# output directories
-set (CMAKE_RUNTIME_OUTPUT_DIRECTORY "bin")
-set (CMAKE_LIBRARY_OUTPUT_DIRECTORY "lib")
-set (CMAKE_ARCHIVE_OUTPUT_DIRECTORY "lib")
+if (NOT GFLAGS_IS_SUBPROJECT)
+ set (CMAKE_RUNTIME_OUTPUT_DIRECTORY "bin")
+ set (CMAKE_LIBRARY_OUTPUT_DIRECTORY "lib")
+ set (CMAKE_ARCHIVE_OUTPUT_DIRECTORY "lib")
+endif ()
# ----------------------------------------------------------------------------
# installation directories
@@ -281,13 +380,11 @@
# The LIB_INSTALL_DIR and LIB_SUFFIX variables are used by the Fedora
# package maintainers. Also package maintainers of other distribution
# packages need to be able to specify the name of the library directory.
- if (NOT LIB_INSTALL_DIR)
- set (LIB_INSTALL_DIR "lib${LIB_SUFFIX}")
+ if (NOT GFLAGS_LIBRARY_INSTALL_DIR AND LIB_INSTALL_DIR)
+ set (GFLAGS_LIBRARY_INSTALL_DIR "${LIB_INSTALL_DIR}")
endif ()
- set (LIBRARY_INSTALL_DIR "${LIB_INSTALL_DIR}"
- CACHE PATH "Directory of installed libraries, e.g., \"lib64\""
- )
- mark_as_advanced (LIBRARY_INSTALL_DIR)
+ gflags_define (PATH LIBRARY_INSTALL_DIR "Directory of installed libraries, e.g., \"lib64\"" "lib${LIB_SUFFIX}")
+ gflags_property (LIBRARY_INSTALL_DIR ADVANCED TRUE)
set (INCLUDE_INSTALL_DIR include)
set (CONFIG_INSTALL_DIR ${LIBRARY_INSTALL_DIR}/cmake/${PACKAGE_NAME})
endif ()
@@ -340,23 +437,55 @@
if (HAVE_SHLWAPI_H)
target_link_libraries (gflags${opts}-${type} shlwapi.lib)
endif ()
- if (NOT TARGET gflags${opts})
- add_custom_target (gflags${opts})
- endif ()
- add_dependencies (gflags${opts} gflags${opts}-${type})
list (APPEND TARGETS gflags${opts}-${type})
+ # add convenience make target for build of both shared and static libraries
+ if (NOT GFLAGS_IS_SUBPROJECT)
+ if (NOT TARGET gflags${opts})
+ add_custom_target (gflags${opts})
+ endif ()
+ add_dependencies (gflags${opts} gflags${opts}-${type})
+ endif ()
endif ()
endforeach ()
endif ()
endforeach ()
+# add ALIAS target for use in super-project, prefer static over shared, single-threaded over multi-threaded
+if (GFLAGS_IS_SUBPROJECT)
+ foreach (type IN ITEMS static shared)
+ foreach (opts IN ITEMS "_nothreads" "")
+ if (TARGET gflags${opts}-${type})
+ add_library (gflags ALIAS gflags${opts}-${type})
+ break ()
+ endif ()
+ endforeach ()
+ if (TARGET gflags)
+ break ()
+ endif ()
+ endforeach ()
+endif ()
+
# ----------------------------------------------------------------------------
# installation rules
file (RELATIVE_PATH INSTALL_PREFIX_REL2CONFIG_DIR "${CMAKE_INSTALL_PREFIX}/${CONFIG_INSTALL_DIR}" "${CMAKE_INSTALL_PREFIX}")
configure_file (cmake/config.cmake.in "${PROJECT_BINARY_DIR}/${PACKAGE_NAME}-config-install.cmake" @ONLY)
configure_file (cmake/version.cmake.in "${PROJECT_BINARY_DIR}/${PACKAGE_NAME}-config-version.cmake" @ONLY)
-install (TARGETS ${TARGETS} DESTINATION ${LIBRARY_INSTALL_DIR} EXPORT gflags-lib)
+if (BUILD_SHARED_LIBS AND INSTALL_SHARED_LIBS)
+ foreach (opts IN ITEMS "" _nothreads)
+ if (BUILD_gflags${opts}_LIB)
+ install (TARGETS gflags${opts}-shared DESTINATION ${LIBRARY_INSTALL_DIR} EXPORT gflags-lib)
+ endif ()
+ endforeach ()
+endif ()
+if (BUILD_STATIC_LIBS AND INSTALL_STATIC_LIBS)
+ foreach (opts IN ITEMS "" _nothreads)
+ if (BUILD_gflags${opts}_LIB)
+ install (TARGETS gflags${opts}-static DESTINATION ${LIBRARY_INSTALL_DIR} EXPORT gflags-lib)
+ endif ()
+ endforeach ()
+endif ()
+
if (INSTALL_HEADERS)
install (FILES ${PUBLIC_HDRS} DESTINATION ${INCLUDE_INSTALL_DIR}/${GFLAGS_INCLUDE_DIR})
install (
@@ -399,10 +528,13 @@
"\n BUILD_SHARED_LIBS=ON"
"\n BUILD_STATIC_LIBS=OFF"
"\n INSTALL_HEADERS=OFF"
+ "\n INSTALL_SHARED_LIBS=ON"
"\nRecommended options for generation of development package:"
"\n BUILD_SHARED_LIBS=ON"
"\n BUILD_STATIC_LIBS=ON"
- "\n INSTALL_HEADERS=ON")
+ "\n INSTALL_HEADERS=ON"
+ "\n INSTALL_SHARED_LIBS=ON"
+ "\n INSTALL_STATIC_LIBS=ON")
endif ()
# default package generators
diff --git a/cmake/utils.cmake b/cmake/utils.cmake
index 9cef463..038baf3 100644
--- a/cmake/utils.cmake
+++ b/cmake/utils.cmake
@@ -11,7 +11,7 @@
endmacro ()
# ----------------------------------------------------------------------------
-## Extract version numbers from version string.
+## Extract version numbers from version string
function (version_numbers version major minor patch)
if (version MATCHES "([0-9]+)(\\.[0-9]+)?(\\.[0-9]+)?(rc[1-9][0-9]*|[a-z]+)?")
if (CMAKE_MATCH_1)
@@ -42,6 +42,73 @@
endfunction ()
# ----------------------------------------------------------------------------
+## Determine if cache entry exists
+macro (gflags_is_cached retvar varname)
+ if (DEFINED ${varname})
+ get_property (${retvar} CACHE ${varname} PROPERTY TYPE SET)
+ else ()
+ set (${retvar} FALSE)
+ endif ()
+endmacro ()
+
+# ----------------------------------------------------------------------------
+## Add gflags configuration variable
+#
+# The default value of the (cached) configuration value can be overridden either
+# on the CMake command-line or the super-project by setting the GFLAGS_<varname>
+# variable. When gflags is a subproject of another project (GFLAGS_IS_SUBPROJECT),
+# the variable is not added to the CMake cache. Otherwise it is cached.
+macro (gflags_define type varname docstring default)
+ if (ARGC GREATER 5)
+ message (FATAL_ERROR "gflags_variable: Too many macro arguments")
+ endif ()
+ if (NOT DEFINED GFLAGS_${varname})
+ if (GFLAGS_IS_SUBPROJECT AND ARGC EQUAL 5)
+ set (GFLAGS_${varname} "${ARGV4}")
+ else ()
+ set (GFLAGS_${varname} "${default}")
+ endif ()
+ endif ()
+ if (GFLAGS_IS_SUBPROJECT)
+ if (NOT DEFINED ${varname})
+ set (${varname} "${GFLAGS_${varname}}")
+ endif ()
+ else ()
+ set (${varname} "${GFLAGS_${varname}}" CACHE ${type} "${docstring}")
+ endif ()
+endmacro ()
+
+# ----------------------------------------------------------------------------
+## Set property of cached gflags configuration variable
+macro (gflags_property varname property value)
+ gflags_is_cached (_cached ${varname})
+ if (_cached)
+ if (property STREQUAL ADVANCED)
+ if (${value})
+ mark_as_advanced (FORCE ${varname})
+ else ()
+ mark_as_advanced (CLEAR ${varname})
+ endif ()
+ else ()
+ set_property (CACHE ${varname} PROPERTY "${property}" "${value}")
+ endif ()
+ endif ()
+ unset (_cached)
+endmacro ()
+
+# ----------------------------------------------------------------------------
+## Modify value of gflags configuration variable
+macro (gflags_set varname value)
+ gflags_is_cached (_cached ${varname})
+ if (_cached)
+ set_property (CACHE ${varname} PROPERTY VALUE "${value}")
+ else ()
+ set (${varname} "${value}")
+ endif ()
+ unset (_cached)
+endmacro ()
+
+# ----------------------------------------------------------------------------
## Configure public header files
function (configure_headers out)
set (tmp)
