CMake Build: Use C++17 (C++20 not yet supported on all target platforms, i.e. Debian 10 Buster with GCC 8.3)

GCC 10.1 mostly covers C++20 and is default on Debian 11 Bullseye, we will move there when established.

For now let's use C++17 at least, especially since GCC C++ ABI fixes a few code generation issues
and we intend to further simplify our C++ codebase.

5 files changed, 25 insertions, 12 deletions

diff --git a/examples/CMakeLists.txt b/examples/CMakeLists.txt
index b6336c3c..d0d05fa5 100644
--- a/examples/CMakeLists.txt
+++ b/examples/CMakeLists.txt
@@ -66,19 +66,22 @@ endif()
 add_executable (dbt_scanner00 direct_bt_scanner00/dbt_scanner00.cpp)
 set_target_properties(dbt_scanner00
     PROPERTIES
-    CXX_STANDARD 11
+    CXX_STANDARD 17
+    CXX_STANDARD_REQUIRED ON
     COMPILE_FLAGS "-Wall -Wextra -Werror")
 
 add_executable (dbt_scanner01 direct_bt_scanner01/dbt_scanner01.cpp)
 set_target_properties(dbt_scanner01
     PROPERTIES
-    CXX_STANDARD 11
+    CXX_STANDARD 17
+    CXX_STANDARD_REQUIRED ON
     COMPILE_FLAGS "-Wall -Wextra -Werror")
 
 add_executable (dbt_scanner10 direct_bt_scanner10/dbt_scanner10.cpp)
 set_target_properties(dbt_scanner10
     PROPERTIES
-    CXX_STANDARD 11
+    CXX_STANDARD 17
+    CXX_STANDARD_REQUIRED ON
     COMPILE_FLAGS "-Wall -Wextra -Werror")
 
 target_link_libraries (dbt_scanner00 direct_bt)
diff --git a/java/jni/direct_bt/CMakeLists.txt b/java/jni/direct_bt/CMakeLists.txt
index 9fd40026..d508c3c0 100644
--- a/java/jni/direct_bt/CMakeLists.txt
+++ b/java/jni/direct_bt/CMakeLists.txt
@@ -45,7 +45,8 @@ set_target_properties(
     PROPERTIES
     SOVERSION ${tinyb_VERSION_MAJOR}
     VERSION ${tinyb_VERSION_STRING}
-    CXX_STANDARD 11
+    CXX_STANDARD 17
+    CXX_STANDARD_REQUIRED ON
     COMPILE_FLAGS "-Wall -Wextra -Werror"
 )
 
diff --git a/src/direct_bt/CMakeLists.txt b/src/direct_bt/CMakeLists.txt
index c8b90ebe..05cbd4be 100644
--- a/src/direct_bt/CMakeLists.txt
+++ b/src/direct_bt/CMakeLists.txt
@@ -47,7 +47,8 @@ set_target_properties(
    PROPERTIES
    SOVERSION ${tinyb_VERSION_MAJOR}
    VERSION ${tinyb_VERSION_STRING}
-   CXX_STANDARD 11
+   CXX_STANDARD 17
+   CXX_STANDARD_REQUIRED ON
    COMPILE_FLAGS "-Wall -Wextra -Werror"
 )
 install (DIRECTORY ${PROJECT_SOURCE_DIR}/api/direct_bt/ DESTINATION include/direct_bt)
diff --git a/test/direct_bt/CMakeLists.txt b/test/direct_bt/CMakeLists.txt
index 80bbe827..4d9e3b51 100644
--- a/test/direct_bt/CMakeLists.txt
+++ b/test/direct_bt/CMakeLists.txt
@@ -12,32 +12,38 @@ add_executable (test_lfringbuffer11  test_lfringbuffer11.cpp)
 
 set_target_properties(test_functiondef01
     PROPERTIES
-    CXX_STANDARD 11
+    CXX_STANDARD 17
+    CXX_STANDARD_REQUIRED ON
     COMPILE_FLAGS "-Wall -Wextra -Werror"
 )
 set_target_properties(test_uuid
     PROPERTIES
-    CXX_STANDARD 11
+    CXX_STANDARD 17
+    CXX_STANDARD_REQUIRED ON
     COMPILE_FLAGS "-Wall -Wextra -Werror"
 )
 set_target_properties(test_basictypes01
     PROPERTIES
-    CXX_STANDARD 11
+    CXX_STANDARD 17
+    CXX_STANDARD_REQUIRED ON
     COMPILE_FLAGS "-Wall -Wextra -Werror"
 )
 set_target_properties(test_attpdu01
     PROPERTIES
-    CXX_STANDARD 11
+    CXX_STANDARD 17
+    CXX_STANDARD_REQUIRED ON
     COMPILE_FLAGS "-Wall -Wextra -Werror"
 )
 set_target_properties(test_lfringbuffer01
     PROPERTIES
-    CXX_STANDARD 11
+    CXX_STANDARD 17
+    CXX_STANDARD_REQUIRED ON
     COMPILE_FLAGS "-Wall -Wextra -Werror"
 )
 set_target_properties(test_lfringbuffer11
     PROPERTIES
-    CXX_STANDARD 11
+    CXX_STANDARD 17
+    CXX_STANDARD_REQUIRED ON
     COMPILE_FLAGS "-Wall -Wextra -Werror"
 )
 
diff --git a/test/ieee11073/CMakeLists.txt b/test/ieee11073/CMakeLists.txt
index 1f144641..3b8f9b38 100644
--- a/test/ieee11073/CMakeLists.txt
+++ b/test/ieee11073/CMakeLists.txt
@@ -7,7 +7,9 @@ add_executable (test_datatypes01     test_datatypes01.cpp)
 
 set_target_properties(test_datatypes01
     PROPERTIES
-    CXX_STANDARD 11)
+    CXX_STANDARD 17
+    CXX_STANDARD_REQUIRED ON
+)
 
 target_link_libraries (test_datatypes01 direct_bt)