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-rw-r--r--src/civetweb/cmake/AddCXXCompilerFlag.cmake38
1 files changed, 38 insertions, 0 deletions
diff --git a/src/civetweb/cmake/AddCXXCompilerFlag.cmake b/src/civetweb/cmake/AddCXXCompilerFlag.cmake
new file mode 100644
index 000000000..5e58c6de4
--- /dev/null
+++ b/src/civetweb/cmake/AddCXXCompilerFlag.cmake
@@ -0,0 +1,38 @@
+# - Adds a compiler flag if it is supported by the compiler
+#
+# This function checks that the supplied compiler flag is supported and then
+# adds it to the corresponding compiler flags
+#
+# add_cxx_compiler_flag(<FLAG> [<VARIANT>])
+#
+# - Example
+#
+# include(AddCXXCompilerFlag)
+# add_cxx_compiler_flag(-Wall)
+# add_cxx_compiler_flag(-no-strict-aliasing RELEASE)
+# Requires CMake 2.6+
+
+if(__add_cxx_compiler_flag)
+ return()
+endif()
+set(__add_cxx_compiler_flag INCLUDED)
+
+include(CheckCXXCompilerFlag)
+
+function(add_cxx_compiler_flag FLAG)
+ string(TOUPPER "HAVE_CXX_FLAG_${FLAG}" SANITIZED_FLAG)
+ string(REPLACE "+" "X" SANITIZED_FLAG ${SANITIZED_FLAG})
+ string(REGEX REPLACE "[^A-Za-z_0-9]" "_" SANITIZED_FLAG ${SANITIZED_FLAG})
+ string(REGEX REPLACE "_+" "_" SANITIZED_FLAG ${SANITIZED_FLAG})
+ set(CMAKE_REQUIRED_FLAGS "${FLAG}")
+ check_cxx_compiler_flag("" ${SANITIZED_FLAG})
+ if(${SANITIZED_FLAG})
+ set(VARIANT ${ARGV1})
+ if(ARGV1)
+ string(REGEX REPLACE "[^A-Za-z_0-9]" "_" VARIANT "${VARIANT}")
+ string(TOUPPER "_${VARIANT}" VARIANT)
+ endif()
+ set(CMAKE_CXX_FLAGS${VARIANT} "${CMAKE_CXX_FLAGS${VARIANT}} ${FLAG}" PARENT_SCOPE)
+ endif()
+endfunction()
+