Set default language version through variable (#937)

wdhongtw · web-flow · commit fac9bc6862a3 · 2025-04-29T22:48:29.000-05:00
Use CMake reserved variable to specify default C++ language version,
so version can be adjust later by each target accordingly.
diff --git a/CMakeLists.txt b/CMakeLists.txt
@@ -152,9 +152,9 @@ add_definitions(
   -DPACKAGE_NAME="${PACKAGE_NAME}"
 )
 
+set(CMAKE_CXX_STANDARD 14) # default C++ version for new target afterward
 if ("${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang")
   add_definitions(
-    -std=c++14
     -Wall
   )
   set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -pthread")
@@ -163,7 +163,6 @@ if ("${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang")
   endif ()
 elseif ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")
   add_definitions(
-    -std=c++14
     -Wall
   )
   set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -pthread")

Original file line number	Diff line number	Diff line change
`@@ -152,9 +152,9 @@ add_definitions(`
`152`	`152`	`-DPACKAGE_NAME="${PACKAGE_NAME}"`
`153`	`153`	`)`
`154`	`154`
	`155`	`+set(CMAKE_CXX_STANDARD 14) # default C++ version for new target afterward`
`155`	`156`	`if ("${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang")`
`156`	`157`	`add_definitions(`
`157`		`- -std=c++14`
`158`	`158`	`-Wall`
`159`	`159`	`)`
`160`	`160`	`set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -pthread")`
`@@ -163,7 +163,6 @@ if ("${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang")`
`163`	`163`	`endif ()`
`164`	`164`	`elseif ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")`
`165`	`165`	`add_definitions(`
`166`		`- -std=c++14`
`167`	`166`	`-Wall`
`168`	`167`	`)`
`169`	`168`	`set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -pthread")`