import std_call_once_bug/ from gh-pages

I rewrote this repository's history completely in an attempt to organize
things properly.
One of those things is moving code to master.
I couldn't figure out how to preserve the history though.
Luckily, it's a very small code sample.

1 files changed, 96 insertions, 0 deletions

diff --git a/common.cmake b/common.cmake
new file mode 100644
index 0000000..d719542
--- /dev/null
+++ b/common.cmake
@@ -0,0 +1,96 @@
+# Copyright (c) 2017 Egor Tensin <Egor.Tensin@gmail.com>
+# It's a CMake code snippet I use in all of my CMake projects.
+# It makes targets link the runtime statically by default + strips debug
+# symbols in release builds.
+# The latest version can be found at
+# https://gist.github.com/egor-tensin/cmake-common.
+# Distributed under the MIT License.
+
+# Version: 2017-05-19T13:51:22+00:00
+
+get_directory_property(parent_directory PARENT_DIRECTORY)
+set(is_root_project $<NOT:parent_directory>)
+
+set(USE_STATIC_RUNTIME "${is_root_project}" CACHE BOOL "Link the runtime statically")
+set(STRIP_SYMBOL_TABLE "${is_root_project}" CACHE BOOL "Strip symbol tables")
+
+if(is_root_project)
+    if(MSVC)
+        add_compile_options(/MP /W4)
+    elseif(CMAKE_COMPILER_IS_GNUCC OR CMAKE_COMPILER_IS_GNUCXX)
+        add_compile_options(-Wall -Wextra)
+    endif()
+endif()
+
+set(CMAKE_CXX_STANDARD 11)
+set(CMAKE_CXX_STANDARD_REQUIRED ON)
+set(CMAKE_CXX_EXTENSIONS OFF)
+
+function(use_static_runtime_msvc target)
+    get_target_property(target_type "${target}" TYPE)
+    if(target_type STREQUAL INTERFACE_LIBRARY)
+    else()
+        target_compile_options("${target}" PRIVATE
+            $<$<CONFIG:Debug>:/MTd>
+            $<$<NOT:$<CONFIG:Debug>>:/MT>)
+    endif()
+endfunction()
+
+function(use_static_runtime_gcc target)
+    get_target_property(target_type "${target}" TYPE)
+    if(target_type STREQUAL EXECUTABLE)
+        target_link_libraries("${target}" PRIVATE -static)
+    endif()
+endfunction()
+
+function(use_static_runtime target)
+    if(MSVC)
+        use_static_runtime_msvc("${target}")
+    elseif(CMAKE_COMPILER_IS_GNUCC OR CMAKE_COMPILER_IS_GNUCXX)
+        use_static_runtime_gcc("${target}")
+    else()
+        message(WARNING "Unrecognized toolset")
+    endif()
+endfunction()
+
+function(strip_symbol_table_gcc target)
+    get_target_property(target_type "${target}" TYPE)
+    set(release_build $<OR:$<CONFIG:Release>,$<CONFIG:MinSizeRel>>)
+    if(target_type STREQUAL INTERFACE_LIBRARY)
+    else()
+        target_link_libraries("${target}" PRIVATE $<${release_build}:-s>)
+    endif()
+endfunction()
+
+function(strip_symbol_table target)
+    if(MSVC)
+    elseif(CMAKE_COMPILER_IS_GNUCC OR CMAKE_COMPILER_IS_GNUCXX)
+        strip_symbol_table_gcc("${target}")
+    else()
+        message(WARNING "Unrecognized toolset")
+    endif()
+endfunction()
+
+function(apply_common_settings target)
+    if(TARGET "${target}")
+        get_target_property(target_imported "${target}" IMPORTED)
+        if(target_imported STREQUAL NOTFOUND OR NOT target_imported)
+            if(STRIP_SYMBOL_TABLE)
+                strip_symbol_table("${target}")
+            endif()
+            if(USE_STATIC_RUNTIME)
+                use_static_runtime("${target}")
+            endif()
+        endif()
+    endif()
+endfunction()
+
+macro(add_executable target)
+    _add_executable(${ARGV})
+    apply_common_settings("${target}")
+endmacro()
+
+macro(add_library target)
+    _add_library(${ARGV})
+    apply_common_settings("${target}")
+endmacro()