CMake

(4 intermediate revisions by the same user not shown)

Line 9:

* Release -- optimized, no symbols

* MinSizeRel -- optimized for size

If <tt>CMAKE_BUILD_TYPE</tt> is not provided, none of these is used -- no debugging flags are set, and no optimization flags are set, in a somewhat stunning bit of unexpected behavior. The following snippet will ensure a default, and allow the value to be selected from a set in the gui:

If <tt>CMAKE_BUILD_TYPE</tt> is not provided, none of these is used -- no debugging flags are set, and no optimization flags are set, in a somewhat stunning bit of unexpected behavior. The following snippet will ensure a default of RelWithDebInfo, and allow the value to be selected from a set in the gui:

<pre>

~~# Set a default build type if none was specified~~

set_property(CACHE CMAKE_BUILD_TYPE PROPERTY STRINGS "Debug" "Release" "MinSizeRel" "RelWithDebInfo")

~~set~~(~~default_build_type~~ "Release")

~~if(EXISTS~~ "~~${CMAKE_SOURCE_DIR}/.git~~")

~~set(default_build_type~~ "~~Debug~~")

~~endif()~~

if(NOT CMAKE_BUILD_TYPE AND NOT CMAKE_CONFIGURATION_TYPES)

~~message(STATUS "Setting build type to '${default_build_type}' as none was specified.")~~

set(CMAKE_BUILD_TYPE "RelWithDebInfo" CACHE STRING "Choose build mode." FORCE)

set(CMAKE_BUILD_TYPE "~~${default_build_type}~~" CACHE

STRING "Choose ~~the type of~~ build." FORCE)

~~# Set the possible values of build type for cmake-gui~~

~~set_property(CACHE CMAKE_BUILD_TYPE PROPERTY STRINGS~~

~~"Debug" "Release" "MinSizeRel" "RelWithDebInfo"~~)

endif()

message(STATUS "Requested build mode: ${CMAKE_BUILD_TYPE}")

</pre>

Build types can be added. I thought this might be useful for a <tt>Coverage</tt> target, but I ended up stuffing the coverage flags into <tt>CMAKE_C_FLAGS_DEBUG</tt>/<tt>CMAKE_CXX_FLAGS_DEBUG</tt>.

==Debugging==

Dump all current variables with:

<pre>

get_cmake_property(_variableNames VARIABLES)

list (SORT _variableNames)

foreach (_variableName ${_variableNames})

message(STATUS "${_variableName}=${${_variableName}}")

endforeach()

</pre>

Better yet, <tt>include(CMakePrintHelpers)</tt> to get the useful commands <tt>cmake_print_properties()</tt> and <tt>cmake_print_variables()</tt>.

CMake: Difference between revisions

Dank (talk | contribs)

@@ Line 9: / Line 9: @@
 * Release -- optimized, no symbols
 * MinSizeRel -- optimized for size
-If <tt>CMAKE_BUILD_TYPE</tt> is not provided, none of these is used -- no debugging flags are set, and no optimization flags are set, in a somewhat stunning bit of unexpected behavior. The following snippet will ensure a default, and allow the value to be selected from a set in the gui:
+If <tt>CMAKE_BUILD_TYPE</tt> is not provided, none of these is used -- no debugging flags are set, and no optimization flags are set, in a somewhat stunning bit of unexpected behavior. The following snippet will ensure a default of RelWithDebInfo, and allow the value to be selected from a set in the gui:
 <pre>
-# Set a default build type if none was specified
+set_property(CACHE CMAKE_BUILD_TYPE PROPERTY STRINGS "Debug" "Release" "MinSizeRel" "RelWithDebInfo")
-set(default_build_type "Release")
-if(EXISTS "${CMAKE_SOURCE_DIR}/.git")
-  set(default_build_type "Debug")
-endif()
 if(NOT CMAKE_BUILD_TYPE AND NOT CMAKE_CONFIGURATION_TYPES)
-  message(STATUS "Setting build type to '${default_build_type}' as none was specified.")
+   set(CMAKE_BUILD_TYPE "RelWithDebInfo" CACHE STRING "Choose build mode." FORCE)
-   set(CMAKE_BUILD_TYPE "${default_build_type}" CACHE
-      STRING "Choose the type of build." FORCE)
-  # Set the possible values of build type for cmake-gui
-  set_property(CACHE CMAKE_BUILD_TYPE PROPERTY STRINGS
-    "Debug" "Release" "MinSizeRel" "RelWithDebInfo")
 endif()
+message(STATUS "Requested build mode: ${CMAKE_BUILD_TYPE}")
+</pre>
+Build types can be added. I thought this might be useful for a <tt>Coverage</tt> target, but I ended up stuffing the coverage flags into <tt>CMAKE_C_FLAGS_DEBUG</tt>/<tt>CMAKE_CXX_FLAGS_DEBUG</tt>.
+==Debugging==
+Dump all current variables with:
+<pre>
+get_cmake_property(_variableNames VARIABLES)
+list (SORT _variableNames)
+foreach (_variableName ${_variableNames})
+    message(STATUS "${_variableName}=${${_variableName}}")
+endforeach()
 </pre>
+Better yet, <tt>include(CMakePrintHelpers)</tt> to get the useful commands <tt>cmake_print_properties()</tt> and <tt>cmake_print_variables()</tt>.