Set C++11 as default C++ standard

Autoconf manual states that CXXFLAGS is a user variable and should not
be overriden, so I did not use AX_APPEND_COMPILE_FLAGS for this. Thus,
there are no checks if the compiler supports it, but also the builder can
override this flag by passing another flag that overrides it on the
command line. Okay, this is now way too theoretical.

Indeed, the override happens with ./configure 'CXXFLAGS=-std=c++17'
(both flags in final command line)

Do note:
- The standard was not explicitly set for some builds (thus compiler
default was used)
- The default on my own box is C++17
- I'm setting C++11 as that's required by my previous change. Upgrade to
  C++17 is deferred to until it becomes required.
- The use of CPPFLAGS could be reviewed... they may be used incorrectly
  (instead of CXXFLAGS). I would really like to get all the builders going
  before requirements are raised.
- CI cleanup would be nice
- wish 4144 would return.

****
mana/plus!128

7 files changed, 42 insertions, 43 deletions

diff --git a/tools/ci/branches/ci_h/.gitlab-ci.yml b/tools/ci/branches/ci_h/.gitlab-ci.yml
index 87eb88666..7054d42d6 100644
--- a/tools/ci/branches/ci_h/.gitlab-ci.yml
+++ b/tools/ci/branches/ci_h/.gitlab-ci.yml
@@ -18,11 +18,11 @@ gcc-5_h_all:
   stage: build
   script:
   - ./tools/ci/scripts/patchsdl1.sh
-  - ./tools/ci/jobs/gcc5_h.sh -std=c++0x -DDEBUGBUILD -DTMWA_SUPPORT -DENABLE_NLS -DUSE_OPENGL -DENABLE_LIBXML -I/usr/include/SDL
-  - ./tools/ci/jobs/gcc5_h.sh -std=c++0x -DDEBUGBUILD -DTMWA_SUPPORT -DENABLE_LIBXML -I/usr/include/SDL
-  - ./tools/ci/jobs/gcc5_h.sh -std=c++0x -DDEBUGBUILD -DTMWA_SUPPORT -DENABLE_NLS -DUSE_OPENGL -DENABLE_LIBXML -DUNITTESTS -DUNITTESTS_CATCH -DUNITTESTS_EMBED -I/usr/include/SDL
-  - ./tools/ci/jobs/gcc5_h.sh -std=c++0x -DDEBUGBUILD -DTMWA_SUPPORT -DENABLE_NLS -DENABLE_LIBXML -I/usr/include/SDL
-  - ./tools/ci/jobs/gcc5_h.sh -std=c++0x -DDEBUGBUILD -DENABLE_NLS -DUSE_OPENGL -DENABLE_LIBXML -I/usr/include/SDL
+  - ./tools/ci/jobs/gcc5_h.sh -std=c++11 -DDEBUGBUILD -DTMWA_SUPPORT -DENABLE_NLS -DUSE_OPENGL -DENABLE_LIBXML -I/usr/include/SDL
+  - ./tools/ci/jobs/gcc5_h.sh -std=c++11 -DDEBUGBUILD -DTMWA_SUPPORT -DENABLE_LIBXML -I/usr/include/SDL
+  - ./tools/ci/jobs/gcc5_h.sh -std=c++11 -DDEBUGBUILD -DTMWA_SUPPORT -DENABLE_NLS -DUSE_OPENGL -DENABLE_LIBXML -DUNITTESTS -DUNITTESTS_CATCH -DUNITTESTS_EMBED -I/usr/include/SDL
+  - ./tools/ci/jobs/gcc5_h.sh -std=c++11 -DDEBUGBUILD -DTMWA_SUPPORT -DENABLE_NLS -DENABLE_LIBXML -I/usr/include/SDL
+  - ./tools/ci/jobs/gcc5_h.sh -std=c++11 -DDEBUGBUILD -DENABLE_NLS -DUSE_OPENGL -DENABLE_LIBXML -I/usr/include/SDL
   <<: *job-push
   image: ubuntu:xenial
   variables:
@@ -36,11 +36,11 @@ gcc-5_h_all_i386:
   stage: build
   script:
   - ./tools/ci/scripts/patchsdl1.sh
-  - ./tools/ci/jobs/gcc5_h.sh -std=c++0x -DDEBUGBUILD -DTMWA_SUPPORT -DENABLE_NLS -DUSE_OPENGL -DENABLE_LIBXML -I/usr/include/SDL
-  - ./tools/ci/jobs/gcc5_h.sh -std=c++0x -DDEBUGBUILD -DTMWA_SUPPORT -DENABLE_LIBXML -I/usr/include/SDL
-  - ./tools/ci/jobs/gcc5_h.sh -std=c++0x -DDEBUGBUILD -DTMWA_SUPPORT -DENABLE_NLS -DUSE_OPENGL -DENABLE_LIBXML -DUNITTESTS -DUNITTESTS_CATCH -DUNITTESTS_EMBED -I/usr/include/SDL
-  - ./tools/ci/jobs/gcc5_h.sh -std=c++0x -DDEBUGBUILD -DTMWA_SUPPORT -DENABLE_NLS -DENABLE_LIBXML -I/usr/include/SDL
-  - ./tools/ci/jobs/gcc5_h.sh -std=c++0x -DDEBUGBUILD -DENABLE_NLS -DUSE_OPENGL -DENABLE_LIBXML -I/usr/include/SDL
+  - ./tools/ci/jobs/gcc5_h.sh -std=c++11 -DDEBUGBUILD -DTMWA_SUPPORT -DENABLE_NLS -DUSE_OPENGL -DENABLE_LIBXML -I/usr/include/SDL
+  - ./tools/ci/jobs/gcc5_h.sh -std=c++11 -DDEBUGBUILD -DTMWA_SUPPORT -DENABLE_LIBXML -I/usr/include/SDL
+  - ./tools/ci/jobs/gcc5_h.sh -std=c++11 -DDEBUGBUILD -DTMWA_SUPPORT -DENABLE_NLS -DUSE_OPENGL -DENABLE_LIBXML -DUNITTESTS -DUNITTESTS_CATCH -DUNITTESTS_EMBED -I/usr/include/SDL
+  - ./tools/ci/jobs/gcc5_h.sh -std=c++11 -DDEBUGBUILD -DTMWA_SUPPORT -DENABLE_NLS -DENABLE_LIBXML -I/usr/include/SDL
+  - ./tools/ci/jobs/gcc5_h.sh -std=c++11 -DDEBUGBUILD -DENABLE_NLS -DUSE_OPENGL -DENABLE_LIBXML -I/usr/include/SDL
   image: i386/ubuntu:xenial
   <<: *job-push
   variables:
@@ -56,11 +56,11 @@ gcc-5_h_pugi_all:
   stage: build
   script:
   - ./tools/ci/scripts/patchsdl1.sh
-  - ./tools/ci/jobs/gcc5_h.sh -std=c++0x -DDEBUGBUILD -DTMWA_SUPPORT -DENABLE_NLS -DUSE_OPENGL -DENABLE_PUGIXML -I/usr/include/SDL
-  - ./tools/ci/jobs/gcc5_h.sh -std=c++0x -DDEBUGBUILD -DTMWA_SUPPORT -DENABLE_PUGIXML -I/usr/include/SDL
-  - ./tools/ci/jobs/gcc5_h.sh -std=c++0x -DDEBUGBUILD -DTMWA_SUPPORT -DENABLE_NLS -DENABLE_PUGIXML -I/usr/include/SDL
-  - ./tools/ci/jobs/gcc5_h.sh -std=c++0x -DDEBUGBUILD -DTMWA_SUPPORT -DENABLE_NLS -DUSE_OPENGL -DENABLE_PUGIXML -DUNITTESTS -DUNITTESTS_CATCH -DUNITTESTS_EMBED -I/usr/include/SDL
-  - ./tools/ci/jobs/gcc5_h.sh -std=c++0x -DDEBUGBUILD -DENABLE_NLS -DUSE_OPENGL -DENABLE_PUGIXML -I/usr/include/SDL
+  - ./tools/ci/jobs/gcc5_h.sh -std=c++11 -DDEBUGBUILD -DTMWA_SUPPORT -DENABLE_NLS -DUSE_OPENGL -DENABLE_PUGIXML -I/usr/include/SDL
+  - ./tools/ci/jobs/gcc5_h.sh -std=c++11 -DDEBUGBUILD -DTMWA_SUPPORT -DENABLE_PUGIXML -I/usr/include/SDL
+  - ./tools/ci/jobs/gcc5_h.sh -std=c++11 -DDEBUGBUILD -DTMWA_SUPPORT -DENABLE_NLS -DENABLE_PUGIXML -I/usr/include/SDL
+  - ./tools/ci/jobs/gcc5_h.sh -std=c++11 -DDEBUGBUILD -DTMWA_SUPPORT -DENABLE_NLS -DUSE_OPENGL -DENABLE_PUGIXML -DUNITTESTS -DUNITTESTS_CATCH -DUNITTESTS_EMBED -I/usr/include/SDL
+  - ./tools/ci/jobs/gcc5_h.sh -std=c++11 -DDEBUGBUILD -DENABLE_NLS -DUSE_OPENGL -DENABLE_PUGIXML -I/usr/include/SDL
   image: ubuntu:xenial
   <<: *job-push
   variables:
@@ -74,11 +74,11 @@ gcc-5_h_tinyxml2_all:
   stage: build
   script:
   - ./tools/ci/scripts/patchsdl1.sh
-  - ./tools/ci/jobs/gcc5_h.sh -std=c++0x -DDEBUGBUILD -DTMWA_SUPPORT -DENABLE_NLS -DUSE_OPENGL -DENABLE_TINYXML2 -I/usr/include/SDL
-  - ./tools/ci/jobs/gcc5_h.sh -std=c++0x -DDEBUGBUILD -DTMWA_SUPPORT -DENABLE_TINYXML2 -I/usr/include/SDL
-  - ./tools/ci/jobs/gcc5_h.sh -std=c++0x -DDEBUGBUILD -DTMWA_SUPPORT -DENABLE_NLS -DENABLE_TINYXML2 -I/usr/include/SDL
-  - ./tools/ci/jobs/gcc5_h.sh -std=c++0x -DDEBUGBUILD -DTMWA_SUPPORT -DENABLE_NLS -DUSE_OPENGL -DENABLE_TINYXML2 -DUNITTESTS -DUNITTESTS_CATCH -DUNITTESTS_EMBED -I/usr/include/SDL
-  - ./tools/ci/jobs/gcc5_h.sh -std=c++0x -DDEBUGBUILD -DENABLE_NLS -DUSE_OPENGL -DENABLE_TINYXML2 -I/usr/include/SDL
+  - ./tools/ci/jobs/gcc5_h.sh -std=c++11 -DDEBUGBUILD -DTMWA_SUPPORT -DENABLE_NLS -DUSE_OPENGL -DENABLE_TINYXML2 -I/usr/include/SDL
+  - ./tools/ci/jobs/gcc5_h.sh -std=c++11 -DDEBUGBUILD -DTMWA_SUPPORT -DENABLE_TINYXML2 -I/usr/include/SDL
+  - ./tools/ci/jobs/gcc5_h.sh -std=c++11 -DDEBUGBUILD -DTMWA_SUPPORT -DENABLE_NLS -DENABLE_TINYXML2 -I/usr/include/SDL
+  - ./tools/ci/jobs/gcc5_h.sh -std=c++11 -DDEBUGBUILD -DTMWA_SUPPORT -DENABLE_NLS -DUSE_OPENGL -DENABLE_TINYXML2 -DUNITTESTS -DUNITTESTS_CATCH -DUNITTESTS_EMBED -I/usr/include/SDL
+  - ./tools/ci/jobs/gcc5_h.sh -std=c++11 -DDEBUGBUILD -DENABLE_NLS -DUSE_OPENGL -DENABLE_TINYXML2 -I/usr/include/SDL
   image: ubuntu:xenial
   <<: *job-push
   variables:
@@ -91,10 +91,10 @@ gcc-5_h_tinyxml2_all:
 gcc-5_h_sdl2:
   stage: build
   script:
-  - ./tools/ci/jobs/gcc5_h.sh -std=c++0x -DDEBUGBUILD -DTMWA_SUPPORT -DENABLE_NLS -DUSE_OPENGL -DENABLE_LIBXML -DUSE_SDL2 -I/usr/include/SDL2
-  - ./tools/ci/jobs/gcc5_h.sh -std=c++0x -DDEBUGBUILD -DTMWA_SUPPORT -DENABLE_LIBXML -DUSE_SDL2 -I/usr/include/SDL2
-  - ./tools/ci/jobs/gcc5_h.sh -std=c++0x -DDEBUGBUILD -DTMWA_SUPPORT -DENABLE_NLS -DENABLE_LIBXML -DUSE_SDL2 -I/usr/include/SDL2
-  - ./tools/ci/jobs/gcc5_h.sh -std=c++0x -DDEBUGBUILD -DTMWA_SUPPORT -DENABLE_NLS -DUSE_OPENGL -DENABLE_LIBXML -DUNITTESTS -DUNITTESTS_CATCH -DUNITTESTS_EMBED -DUSE_SDL2 -I/usr/include/SDL2
+  - ./tools/ci/jobs/gcc5_h.sh -std=c++11 -DDEBUGBUILD -DTMWA_SUPPORT -DENABLE_NLS -DUSE_OPENGL -DENABLE_LIBXML -DUSE_SDL2 -I/usr/include/SDL2
+  - ./tools/ci/jobs/gcc5_h.sh -std=c++11 -DDEBUGBUILD -DTMWA_SUPPORT -DENABLE_LIBXML -DUSE_SDL2 -I/usr/include/SDL2
+  - ./tools/ci/jobs/gcc5_h.sh -std=c++11 -DDEBUGBUILD -DTMWA_SUPPORT -DENABLE_NLS -DENABLE_LIBXML -DUSE_SDL2 -I/usr/include/SDL2
+  - ./tools/ci/jobs/gcc5_h.sh -std=c++11 -DDEBUGBUILD -DTMWA_SUPPORT -DENABLE_NLS -DUSE_OPENGL -DENABLE_LIBXML -DUNITTESTS -DUNITTESTS_CATCH -DUNITTESTS_EMBED -DUSE_SDL2 -I/usr/include/SDL2
   image: ubuntu:xenial
   <<: *job-push
   variables:
@@ -107,10 +107,10 @@ gcc-5_h_sdl2:
 gcc-5_h_sdl2_i386:
   stage: build
   script:
-  - ./tools/ci/jobs/gcc5_h.sh -std=c++0x -DDEBUGBUILD -DTMWA_SUPPORT -DENABLE_NLS -DUSE_OPENGL -DENABLE_LIBXML -DUSE_SDL2 -I/usr/include/SDL2
-  - ./tools/ci/jobs/gcc5_h.sh -std=c++0x -DDEBUGBUILD -DTMWA_SUPPORT -DENABLE_LIBXML -DUSE_SDL2 -I/usr/include/SDL2
-  - ./tools/ci/jobs/gcc5_h.sh -std=c++0x -DDEBUGBUILD -DTMWA_SUPPORT -DENABLE_NLS -DENABLE_LIBXML -DUSE_SDL2 -I/usr/include/SDL2
-  - ./tools/ci/jobs/gcc5_h.sh -std=c++0x -DDEBUGBUILD -DTMWA_SUPPORT -DENABLE_NLS -DUSE_OPENGL -DENABLE_LIBXML -DUNITTESTS -DUNITTESTS_CATCH -DUNITTESTS_EMBED -DUSE_SDL2 -I/usr/include/SDL2
+  - ./tools/ci/jobs/gcc5_h.sh -std=c++11 -DDEBUGBUILD -DTMWA_SUPPORT -DENABLE_NLS -DUSE_OPENGL -DENABLE_LIBXML -DUSE_SDL2 -I/usr/include/SDL2
+  - ./tools/ci/jobs/gcc5_h.sh -std=c++11 -DDEBUGBUILD -DTMWA_SUPPORT -DENABLE_LIBXML -DUSE_SDL2 -I/usr/include/SDL2
+  - ./tools/ci/jobs/gcc5_h.sh -std=c++11 -DDEBUGBUILD -DTMWA_SUPPORT -DENABLE_NLS -DENABLE_LIBXML -DUSE_SDL2 -I/usr/include/SDL2
+  - ./tools/ci/jobs/gcc5_h.sh -std=c++11 -DDEBUGBUILD -DTMWA_SUPPORT -DENABLE_NLS -DUSE_OPENGL -DENABLE_LIBXML -DUNITTESTS -DUNITTESTS_CATCH -DUNITTESTS_EMBED -DUSE_SDL2 -I/usr/include/SDL2
   image: i386/ubuntu:xenial
   <<: *job-push
   variables:
diff --git a/tools/ci/branches/master/.gitlab-ci.yml b/tools/ci/branches/master/.gitlab-ci.yml
index 610c4dfda..fc91cad31 100644
--- a/tools/ci/branches/master/.gitlab-ci.yml
+++ b/tools/ci/branches/master/.gitlab-ci.yml
@@ -281,11 +281,11 @@ linters:
 gcc-5_h_all:
   stage: prebuild
   script:
-  - ./tools/ci/jobs/gcc5_h.sh -std=c++0x -DDEBUGBUILD -DTMWA_SUPPORT -DENABLE_NLS -DUSE_OPENGL -DENABLE_LIBXML -I/usr/include/SDL
-  - ./tools/ci/jobs/gcc5_h.sh -std=c++0x -DDEBUGBUILD -DTMWA_SUPPORT -DENABLE_LIBXML -I/usr/include/SDL
-  - ./tools/ci/jobs/gcc5_h.sh -std=c++0x -DDEBUGBUILD -DTMWA_SUPPORT -DENABLE_NLS -DUSE_OPENGL -DENABLE_LIBXML -DUNITTESTS -DUNITTESTS_CATCH -DUNITTESTS_EMBED -I/usr/include/SDL
-  - ./tools/ci/jobs/gcc5_h.sh -std=c++0x -DDEBUGBUILD -DTMWA_SUPPORT -DENABLE_NLS -DENABLE_LIBXML -I/usr/include/SDL
-  - ./tools/ci/jobs/gcc5_h.sh -std=c++0x -DDEBUGBUILD -DENABLE_NLS -DUSE_OPENGL -DENABLE_LIBXML -I/usr/include/SDL
+  - ./tools/ci/jobs/gcc5_h.sh -std=c++11 -DDEBUGBUILD -DTMWA_SUPPORT -DENABLE_NLS -DUSE_OPENGL -DENABLE_LIBXML -I/usr/include/SDL
+  - ./tools/ci/jobs/gcc5_h.sh -std=c++11 -DDEBUGBUILD -DTMWA_SUPPORT -DENABLE_LIBXML -I/usr/include/SDL
+  - ./tools/ci/jobs/gcc5_h.sh -std=c++11 -DDEBUGBUILD -DTMWA_SUPPORT -DENABLE_NLS -DUSE_OPENGL -DENABLE_LIBXML -DUNITTESTS -DUNITTESTS_CATCH -DUNITTESTS_EMBED -I/usr/include/SDL
+  - ./tools/ci/jobs/gcc5_h.sh -std=c++11 -DDEBUGBUILD -DTMWA_SUPPORT -DENABLE_NLS -DENABLE_LIBXML -I/usr/include/SDL
+  - ./tools/ci/jobs/gcc5_h.sh -std=c++11 -DDEBUGBUILD -DENABLE_NLS -DUSE_OPENGL -DENABLE_LIBXML -I/usr/include/SDL
   <<: *job-push
   variables:
     PACKAGES: gcc-5 g++-5 
@@ -296,11 +296,11 @@ gcc-5_h_all:
 gcc-5_h_all_i386:
   stage: prebuild
   script:
-  - ./tools/ci/jobs/gcc5_h.sh -std=c++0x -DDEBUGBUILD -DTMWA_SUPPORT -DENABLE_NLS -DUSE_OPENGL -DENABLE_LIBXML -I/usr/include/SDL
-  - ./tools/ci/jobs/gcc5_h.sh -std=c++0x -DDEBUGBUILD -DTMWA_SUPPORT -DENABLE_LIBXML -I/usr/include/SDL
-  - ./tools/ci/jobs/gcc5_h.sh -std=c++0x -DDEBUGBUILD -DTMWA_SUPPORT -DENABLE_NLS -DUSE_OPENGL -DENABLE_LIBXML -DUNITTESTS -DUNITTESTS_CATCH -DUNITTESTS_EMBED -I/usr/include/SDL
-  - ./tools/ci/jobs/gcc5_h.sh -std=c++0x -DDEBUGBUILD -DTMWA_SUPPORT -DENABLE_NLS -DENABLE_LIBXML -I/usr/include/SDL
-  - ./tools/ci/jobs/gcc5_h.sh -std=c++0x -DDEBUGBUILD -DENABLE_NLS -DUSE_OPENGL -DENABLE_LIBXML -I/usr/include/SDL
+  - ./tools/ci/jobs/gcc5_h.sh -std=c++11 -DDEBUGBUILD -DTMWA_SUPPORT -DENABLE_NLS -DUSE_OPENGL -DENABLE_LIBXML -I/usr/include/SDL
+  - ./tools/ci/jobs/gcc5_h.sh -std=c++11 -DDEBUGBUILD -DTMWA_SUPPORT -DENABLE_LIBXML -I/usr/include/SDL
+  - ./tools/ci/jobs/gcc5_h.sh -std=c++11 -DDEBUGBUILD -DTMWA_SUPPORT -DENABLE_NLS -DUSE_OPENGL -DENABLE_LIBXML -DUNITTESTS -DUNITTESTS_CATCH -DUNITTESTS_EMBED -I/usr/include/SDL
+  - ./tools/ci/jobs/gcc5_h.sh -std=c++11 -DDEBUGBUILD -DTMWA_SUPPORT -DENABLE_NLS -DENABLE_LIBXML -I/usr/include/SDL
+  - ./tools/ci/jobs/gcc5_h.sh -std=c++11 -DDEBUGBUILD -DENABLE_NLS -DUSE_OPENGL -DENABLE_LIBXML -I/usr/include/SDL
   image: i386/debian:unstable
   <<: *job-push
   variables:
diff --git a/tools/ci/jobs/gcc47_c++11.sh b/tools/ci/jobs/gcc47_c++11.sh
index 3860ee79e..b93a03b7b 100755
--- a/tools/ci/jobs/gcc47_c++11.sh
+++ b/tools/ci/jobs/gcc47_c++11.sh
@@ -16,7 +16,6 @@ source ./tools/ci/scripts/init.sh
 
 export CXXFLAGS="$CXXFLAGS -ggdb3 -O2 -pipe -ffast-math \
 -funswitch-loops \
--std=c++0x \
 -fno-omit-frame-pointer $POST_CXXFLAGS"
 
 do_init
diff --git a/tools/ci/jobs/gcc48_c++11.sh b/tools/ci/jobs/gcc48_c++11.sh
index 9652f1fc1..c6030ea22 100755
--- a/tools/ci/jobs/gcc48_c++11.sh
+++ b/tools/ci/jobs/gcc48_c++11.sh
@@ -31,7 +31,7 @@ export CXXFLAGS="$CXXFLAGS -ggdb3 -O2 -pipe -ffast-math \
 -Wwrite-strings -Wstack-protector -Wshadow -Wunused-macros -Wsynth \
 -Wbuiltin-macro-redefined -Wctor-dtor-privacy -Wdeprecated \
 -Wendif-labels -Wformat=1 -Wimport -Wnon-virtual-dtor -Wpsabi \
--Wsign-promo -Wwrite-strings -D_FORTIFY_SOURCE=2 -Wc++11-compat -std=c++0x \
+-Wsign-promo -Wwrite-strings -D_FORTIFY_SOURCE=2 -Wc++17-compat -std=c++11 \
 -Wdelete-non-virtual-dtor -Wmaybe-uninitialized -Wunused-local-typedefs \
 -Wvector-operation-performance -Wfree-nonheap-object -Winvalid-memory-model \
 -Wnarrowing -Wzero-as-null-pointer-constant -funsafe-loop-optimizations \
diff --git a/tools/ci/jobs/gcc49_c++11.sh b/tools/ci/jobs/gcc49_c++11.sh
index e9ecdc154..09c161367 100755
--- a/tools/ci/jobs/gcc49_c++11.sh
+++ b/tools/ci/jobs/gcc49_c++11.sh
@@ -30,7 +30,7 @@ export CXXFLAGS="$CXXFLAGS -ggdb3 -O2 -pipe -ffast-math \
 -Wwrite-strings -Wstack-protector -Wshadow -Wunused-macros -Wsynth \
 -Wbuiltin-macro-redefined -Wctor-dtor-privacy -Wdeprecated \
 -Wendif-labels -Wformat=1 -Wimport -Wnon-virtual-dtor -Wpsabi \
--Wsign-promo -Wwrite-strings -D_FORTIFY_SOURCE=2 -Wc++11-compat -std=c++0x \
+-Wsign-promo -Wwrite-strings -D_FORTIFY_SOURCE=2 -Wc++17-compat -std=c++11 \
 -Wdelete-non-virtual-dtor -Wmaybe-uninitialized -Wunused-local-typedefs \
 -Wvector-operation-performance -Wfree-nonheap-object -Winvalid-memory-model \
 -Wnarrowing -Wzero-as-null-pointer-constant -funsafe-loop-optimizations \
diff --git a/tools/ci/jobs/gcc49_sanitize.sh b/tools/ci/jobs/gcc49_sanitize.sh
index f9ae60711..3c22f7e21 100755
--- a/tools/ci/jobs/gcc49_sanitize.sh
+++ b/tools/ci/jobs/gcc49_sanitize.sh
@@ -32,7 +32,7 @@ export CXXFLAGS="$CXXFLAGS -ggdb3 -O2 -ffast-math \
 -Wwrite-strings -Wstack-protector -Wshadow -Wunused-macros -Wsynth \
 -Wbuiltin-macro-redefined -Wctor-dtor-privacy -Wdeprecated \
 -Wendif-labels -Wformat=1 -Wimport -Wnon-virtual-dtor -Wpsabi \
--Wsign-promo -Wwrite-strings -D_FORTIFY_SOURCE=2 -Wc++11-compat -std=c++0x \
+-Wsign-promo -Wwrite-strings -D_FORTIFY_SOURCE=2 -Wc++17-compat -std=c++11 \
 -Wdelete-non-virtual-dtor -Wmaybe-uninitialized -Wunused-local-typedefs \
 -Wvector-operation-performance -Wfree-nonheap-object -Winvalid-memory-model \
 -Wnarrowing -Wzero-as-null-pointer-constant -funsafe-loop-optimizations \
diff --git a/tools/ci/jobs/gcc49_sanitize_tests.sh b/tools/ci/jobs/gcc49_sanitize_tests.sh
index 787022b13..2432dc02d 100755
--- a/tools/ci/jobs/gcc49_sanitize_tests.sh
+++ b/tools/ci/jobs/gcc49_sanitize_tests.sh
@@ -32,7 +32,7 @@ export CXXFLAGS="$CXXFLAGS -ggdb3 -O2 -ffast-math \
 -Wwrite-strings -Wstack-protector -Wshadow -Wunused-macros -Wsynth \
 -Wbuiltin-macro-redefined -Wctor-dtor-privacy -Wdeprecated \
 -Wendif-labels -Wformat=1 -Wimport -Wnon-virtual-dtor -Wpsabi \
--Wsign-promo -Wwrite-strings -D_FORTIFY_SOURCE=2 -Wc++11-compat -std=c++0x \
+-Wsign-promo -Wwrite-strings -D_FORTIFY_SOURCE=2 -Wc++17-compat -std=c++11 \
 -Wdelete-non-virtual-dtor -Wmaybe-uninitialized -Wunused-local-typedefs \
 -Wvector-operation-performance -Wfree-nonheap-object -Winvalid-memory-model \
 -Wnarrowing -Wzero-as-null-pointer-constant -funsafe-loop-optimizations \