1 files changed, 78 insertions, 0 deletions

diff --git a/project/cmake/scripts/common/AddOptions.cmake b/project/cmake/scripts/common/AddOptions.cmake
new file mode 100644
index 0000000..96837c1
--- /dev/null
+++ b/project/cmake/scripts/common/AddOptions.cmake
@@ -0,0 +1,78 @@
+# - Add options without repeating them on the command line
+#
+# Synopsis:
+#
+#       add_options (lang build opts)
+#
+# where:
+#
+#       lang       Name of the language whose compiler should receive the
+#                  options, e.g. CXX. If a comma-separated list is received
+#                  then the option is added for all those languages. Use the
+#                  special value ALL_LANGUAGES for these languages: CXX, C
+#                  and Fortran
+#
+#       build      Kind of build to which this options should apply,
+#              such as DEBUG and RELEASE. This can also be a comma-
+#                  separated list. Use the special value ALL_BUILDS to apply
+#                  to all builds.
+#
+#       opts       List of options to add. Each should be quoted.
+#
+# Example:
+#
+#       add_options (CXX RELEASE "-O3" "-DNDEBUG" "-Wall")
+
+function(add_options langs builds)
+  # special handling of empty language specification
+  if("${langs}" STREQUAL "ALL_LANGUAGES")
+        set(langs CXX C Fortran)
+  endif()
+  foreach(lang IN LISTS langs)
+        # prepend underscore if necessary
+        foreach(build IN LISTS builds)
+          if(NOT ("${build}" STREQUAL "ALL_BUILDS"))
+                set(_bld "_${build}")
+                string(TOUPPER "${_bld}" _bld)
+          else()
+                set(_bld "")
+          endif()
+          foreach(_opt IN LISTS ARGN)
+                set(_var "CMAKE_${lang}_FLAGS${_bld}")
+                #message(STATUS "Adding \"${_opt}\" to \${${_var}}")
+                # remove it first
+                string(REPLACE "${_opt}" "" _without "${${_var}}")
+                string(STRIP "${_without}" _without)
+                # we need to strip this one as well, so they are comparable
+                string(STRIP "${${_var}}" _stripped)
+                # if it wasn't there, then add it at the end
+                if("${_without}" STREQUAL "${_stripped}")
+                  # don't add any extra spaces if no options yet are set
+                  if(NOT ${_stripped} STREQUAL "")
+                        set(${_var} "${_stripped} ${_opt}")
+                  else()
+                        set(${_var} "${_opt}")
+                  endif()
+                  set(${_var} "${${_var}}" PARENT_SCOPE)
+                endif()
+          endforeach()
+        endforeach()
+  endforeach()
+endfunction()
+
+# set varname to flag unless user has specified something that matches regex
+function(set_default_option varname flag regex)
+  if(NOT "$ENV{CXXFLAGS}" MATCHES "${regex}"
+          AND NOT "${CMAKE_CXX_FLAGS}" MATCHES "${regex}"
+          AND NOT "${CMAKE_CXX_FLAGS_${CMAKE_BUILD_TYPE}}" MATCHES "${regex}")
+        set(${varname} ${flag} PARENT_SCOPE)
+  else()
+        set(${varname} PARENT_SCOPE)
+  endif()
+endfunction()
+
+# note: this must be called before project()
+macro(no_default_options)
+  # prevent the platform probe to set options
+  set(CMAKE_NOT_USING_CONFIG_FLAGS TRUE)
+endmacro()