Use for Fedora raw hide own gcc flags, because gcc most time outdated.

6 files changed, 373 insertions, 4 deletions

diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 33045890b..6d172d359 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -671,6 +671,7 @@ gcc-7_sanitize:
   variables:
     PMUPDATE: "dnf install --refresh -y @development-tools"
     PMINSTALL: "dnf install -y bash tar findutils gcc gcc-c++ make libpng-devel libcurl-devel openssl-devel libxml2-devel gcc SDL-devel SDL_net-devel SDL_image-devel SDL_ttf-devel SDL_mixer-devel SDL_gfx-devel zlib-devel gettext-devel automake autoconf valgrind libasan liblsan libubsan"
+    FLAGS: "gccfedora.sh"
   tags:
   - docker
 
@@ -684,6 +685,7 @@ gcc-7_sanitize:
   variables:
     PMUPDATE: "dnf install --refresh -y @development-tools"
     PMINSTALL: "dnf install -y bash tar findutils mesa-libGL-devel gcc gcc-c++ make libpng-devel libcurl-devel openssl-devel libxml2-devel gcc SDL2-devel SDL2_net-devel SDL2_image-devel SDL2_ttf-devel SDL2_mixer-devel SDL2_gfx-devel zlib-devel gettext-devel automake autoconf valgrind libasan liblsan libubsan"
+    FLAGS: "gccfedora.sh"
   tags:
   - docker
 
@@ -2487,6 +2489,7 @@ fedora_gcc-snapshot_tests:
   variables:
     PMUPDATE: "dnf install --refresh -y @development-tools"
     PMINSTALL: "dnf install -y bash tar findutils gcc gcc-c++ make libpng-devel libcurl-devel openssl-devel libxml2-devel gcc SDL-devel SDL_net-devel SDL_image-devel SDL_ttf-devel SDL_mixer-devel SDL_gfx-devel zlib-devel gettext-devel automake autoconf valgrind"
+    FLAGS: "gccfedora.sh"
   tags:
   - docker
 
@@ -2499,6 +2502,7 @@ fedora_gcc-snapshot_sdl2_tests:
   variables:
     PMUPDATE: "dnf install --refresh -y @development-tools"
     PMINSTALL: "dnf install -y bash tar findutils mesa-libGL-devel gcc gcc-c++ make libpng-devel libcurl-devel openssl-devel libxml2-devel gcc SDL2-devel SDL2_net-devel SDL2_image-devel SDL2_ttf-devel SDL2_mixer-devel SDL2_gfx-devel zlib-devel gettext-devel automake autoconf valgrind"
+    FLAGS: "gccfedora.sh"
   tags:
   - docker
 
@@ -2512,6 +2516,7 @@ fedora_gcc-snapshot:
   variables:
     PMUPDATE: "dnf install --refresh -y @development-tools"
     PMINSTALL: "dnf install -y nc bash tar findutils gcc gcc-c++ make libpng-devel libcurl-devel openssl-devel libxml2-devel gcc SDL-devel SDL_net-devel SDL_image-devel SDL_ttf-devel SDL_mixer-devel SDL_gfx-devel zlib-devel gettext-devel automake autoconf"
+    FLAGS: "gccfedora.sh"
   tags:
   - docker
 
@@ -2525,6 +2530,7 @@ fedora_gcc-snapshot_sdl2:
   variables:
     PMUPDATE: "dnf install --refresh -y @development-tools"
     PMINSTALL: "dnf install -y nc bash tar findutils mesa-libGL-devel gcc gcc-c++ make libpng-devel libcurl-devel openssl-devel libxml2-devel gcc SDL2-devel SDL2_net-devel SDL2_image-devel SDL2_ttf-devel SDL2_mixer-devel SDL2_gfx-devel zlib-devel gettext-devel automake autoconf"
+    FLAGS: "gccfedora.sh"
   tags:
   - docker
 
diff --git a/tools/ci/flags/gccfedora.sh b/tools/ci/flags/gccfedora.sh
new file mode 100755
index 000000000..9ac663bc1
--- /dev/null
+++ b/tools/ci/flags/gccfedora.sh
@@ -0,0 +1,347 @@
+#!/bin/bash
+
+#export CXXFLAGS="${CXXFLAGS} --all-warnings"
+#export CXXFLAGS="${CXXFLAGS} --extra-warnings"
+export CXXFLAGS="${CXXFLAGS} -W"
+export CXXFLAGS="${CXXFLAGS} -Wabi"
+# ignoring
+#export CXXFLAGS="${CXXFLAGS} -Wabi-tag"
+#export CXXFLAGS="${CXXFLAGS} -Wabi="
+export CXXFLAGS="${CXXFLAGS} -Waddress"
+# +++ ignoring. may be can be fixed?
+#export CXXFLAGS="${CXXFLAGS} -Waggregate-return"
+export CXXFLAGS="${CXXFLAGS} -Waggressive-loop-optimizations"
+# not for C++
+#export CXXFLAGS="${CXXFLAGS} -Waliasing"
+#export CXXFLAGS="${CXXFLAGS} -Walign-commons"
+export CXXFLAGS="${CXXFLAGS} -Waligned-new=all"
+export CXXFLAGS="${CXXFLAGS} -Wall"
+# for future usage?
+#export CXXFLAGS="${CXXFLAGS} -Walloc-size-larger-than=N"
+export CXXFLAGS="${CXXFLAGS} -Walloc-zero"
+export CXXFLAGS="${CXXFLAGS} -Walloca"
+#-Walloca already inlcude this
+#export CXXFLAGS="${CXXFLAGS} -Walloca-larger-than="
+# not for C++
+#export CXXFLAGS="${CXXFLAGS} -Wampersand"
+#export CXXFLAGS="${CXXFLAGS} -Wargument-mismatch"
+export CXXFLAGS="${CXXFLAGS} -Warray-bounds"
+# +++ need try it
+export CXXFLAGS="${CXXFLAGS} -Warray-bounds=2"
+# not for C++
+#export CXXFLAGS="${CXXFLAGS} -Warray-temporaries"
+#export CXXFLAGS="${CXXFLAGS} -Wassign-intercept"
+export CXXFLAGS="${CXXFLAGS} -Wattributes"
+# not for C++
+#export CXXFLAGS="${CXXFLAGS} -Wbad-function-cast"
+export CXXFLAGS="${CXXFLAGS} -Wbool-compare"
+export CXXFLAGS="${CXXFLAGS} -Wbool-operation"
+export CXXFLAGS="${CXXFLAGS} -Wbuiltin-declaration-mismatch"
+export CXXFLAGS="${CXXFLAGS} -Wbuiltin-macro-redefined"
+#export CXXFLAGS="${CXXFLAGS} -Wc++-compat"
+#export CXXFLAGS="${CXXFLAGS} -Wc++0x-compat"
+#export CXXFLAGS="${CXXFLAGS} -Wc++11-compat"
+#export CXXFLAGS="${CXXFLAGS} -Wc++14-compat"
+#export CXXFLAGS="${CXXFLAGS} -Wc++17-compat"
+export CXXFLAGS="${CXXFLAGS} -Wc++1z-compat"
+# not for C++
+#export CXXFLAGS="${CXXFLAGS} -Wc-binding-type"
+#export CXXFLAGS="${CXXFLAGS} -Wc90-c99-compat"
+#export CXXFLAGS="${CXXFLAGS} -Wc99-c11-compat"
+export CXXFLAGS="${CXXFLAGS} -Wcast-align"
+export CXXFLAGS="${CXXFLAGS} -Wcast-qual"
+# +++ enable after. some warnings
+#export CXXFLAGS="${CXXFLAGS} -Wcatch-value=3"
+export CXXFLAGS="${CXXFLAGS} -Wchar-subscripts"
+# not for C++
+#export CXXFLAGS="${CXXFLAGS} -Wcharacter-truncation"
+export CXXFLAGS="${CXXFLAGS} -Wchkp"
+# still missing in fedora
+#export CXXFLAGS="${CXXFLAGS} -Wclass-memaccess"
+export CXXFLAGS="${CXXFLAGS} -Wclobbered"
+export CXXFLAGS="${CXXFLAGS} -Wcomment"
+export CXXFLAGS="${CXXFLAGS} -Wcomments"
+# not for C++
+#export CXXFLAGS="${CXXFLAGS} -Wcompare-reals"
+export CXXFLAGS="${CXXFLAGS} -Wconditionally-supported"
+# +++ need fix in future
+#export CXXFLAGS="${CXXFLAGS} -Wconversion"
+# not for C++
+#export CXXFLAGS="${CXXFLAGS} -Wconversion-extra"
+export CXXFLAGS="${CXXFLAGS} -Wconversion-null"
+export CXXFLAGS="${CXXFLAGS} -Wcoverage-mismatch"
+export CXXFLAGS="${CXXFLAGS} -Wcpp"
+export CXXFLAGS="${CXXFLAGS} -Wctor-dtor-privacy"
+export CXXFLAGS="${CXXFLAGS} -Wdangling-else"
+export CXXFLAGS="${CXXFLAGS} -Wdate-time"
+# not for C++
+#export CXXFLAGS="${CXXFLAGS} -Wdeclaration-after-statement"
+export CXXFLAGS="${CXXFLAGS} -Wdelete-incomplete"
+export CXXFLAGS="${CXXFLAGS} -Wdelete-non-virtual-dtor"
+export CXXFLAGS="${CXXFLAGS} -Wdeprecated"
+export CXXFLAGS="${CXXFLAGS} -Wdeprecated-declarations"
+# not for C++
+#export CXXFLAGS="${CXXFLAGS} -Wdesignated-init"
+export CXXFLAGS="${CXXFLAGS} -Wdisabled-optimization"
+# not for C++
+#export CXXFLAGS="${CXXFLAGS} -Wdiscarded-array-qualifiers"
+#export CXXFLAGS="${CXXFLAGS} -Wdiscarded-qualifiers"
+export CXXFLAGS="${CXXFLAGS} -Wdiv-by-zero"
+# +++ need fix in future
+#export CXXFLAGS="${CXXFLAGS} -Wdouble-promotion"
+# not for C++
+#export CXXFLAGS="${CXXFLAGS} -Wduplicate-decl-specifier"
+export CXXFLAGS="${CXXFLAGS} -Wduplicated-branches"
+export CXXFLAGS="${CXXFLAGS} -Wduplicated-cond"
+# +++ too many warnings. may be used some times
+#export CXXFLAGS="${CXXFLAGS} -Weffc++"
+export CXXFLAGS="${CXXFLAGS} -Wempty-body"
+export CXXFLAGS="${CXXFLAGS} -Wendif-labels"
+export CXXFLAGS="${CXXFLAGS} -Wenum-compare"
+export CXXFLAGS="${CXXFLAGS} -Werror-implicit-function-declaration"
+export CXXFLAGS="${CXXFLAGS} -Wexpansion-to-defined"
+export CXXFLAGS="${CXXFLAGS} -Wextra"
+
+# not in all snapshots. need return after
+#export CXXFLAGS="${CXXFLAGS} -Wextra-semi"
+# +++ need fix in future
+#export CXXFLAGS="${CXXFLAGS} -Wfloat-conversion"
+# +++ need fix in future
+#export CXXFLAGS="${CXXFLAGS} -Wfloat-equal"
+export CXXFLAGS="${CXXFLAGS} -Wformat=1"
+export CXXFLAGS="${CXXFLAGS} -Wformat-contains-nul"
+export CXXFLAGS="${CXXFLAGS} -Wformat-extra-args"
+# +++ ignoring. probably need use some times
+#export CXXFLAGS="${CXXFLAGS} -Wformat-nonliteral"
+export CXXFLAGS="${CXXFLAGS} -Wformat-overflow=2"
+export CXXFLAGS="${CXXFLAGS} -Wformat-security"
+export CXXFLAGS="${CXXFLAGS} -Wformat-signedness"
+export CXXFLAGS="${CXXFLAGS} -Wformat-truncation=2"
+export CXXFLAGS="${CXXFLAGS} -Wformat-y2k"
+export CXXFLAGS="${CXXFLAGS} -Wformat-zero-length"
+#export CXXFLAGS="${CXXFLAGS} -Wformat="
+export CXXFLAGS="${CXXFLAGS} -Wframe-address"
+#export CXXFLAGS="${CXXFLAGS} -Wframe-larger-than=<number>"
+export CXXFLAGS="${CXXFLAGS} -Wfree-nonheap-object"
+# not for C++
+#export CXXFLAGS="${CXXFLAGS} -Wfunction-elimination"
+export CXXFLAGS="${CXXFLAGS} -Whsa"
+export CXXFLAGS="${CXXFLAGS} -Wignored-attributes"
+export CXXFLAGS="${CXXFLAGS} -Wignored-qualifiers"
+# not for C++
+#export CXXFLAGS="${CXXFLAGS} -Wimplicit"
+#export CXXFLAGS="${CXXFLAGS} -Wimplicit-fallthrough"
+export CXXFLAGS="${CXXFLAGS} -Wimplicit-fallthrough=5"
+#export CXXFLAGS="${CXXFLAGS} -Wimplicit-function-declaration"
+#export CXXFLAGS="${CXXFLAGS} -Wimplicit-int"
+#export CXXFLAGS="${CXXFLAGS} -Wimplicit-interface"
+#export CXXFLAGS="${CXXFLAGS} -Wimplicit-procedure"
+#export CXXFLAGS="${CXXFLAGS} -Wincompatible-pointer-types"
+export CXXFLAGS="${CXXFLAGS} -Winherited-variadic-ctor"
+export CXXFLAGS="${CXXFLAGS} -Winit-self"
+# ignoting
+#export CXXFLAGS="${CXXFLAGS} -Winline"
+# not for C++
+#export CXXFLAGS="${CXXFLAGS} -Wint-conversion"
+export CXXFLAGS="${CXXFLAGS} -Wint-in-bool-context"
+export CXXFLAGS="${CXXFLAGS} -Wint-to-pointer-cast"
+# not for C++
+#export CXXFLAGS="${CXXFLAGS} -Winteger-division"
+#export CXXFLAGS="${CXXFLAGS} -Wintrinsic-shadow"
+#export CXXFLAGS="${CXXFLAGS} -Wintrinsics-std"
+export CXXFLAGS="${CXXFLAGS} -Winvalid-memory-model"
+export CXXFLAGS="${CXXFLAGS} -Winvalid-offsetof"
+export CXXFLAGS="${CXXFLAGS} -Winvalid-pch"
+# not for C++
+#export CXXFLAGS="${CXXFLAGS} -Wjump-misses-init"
+#export CXXFLAGS="${CXXFLAGS} -Wlarger-than-"
+#export CXXFLAGS="${CXXFLAGS} -Wlarger-than="
+#export CXXFLAGS="${CXXFLAGS} -Wline-truncation"
+export CXXFLAGS="${CXXFLAGS} -Wliteral-suffix"
+export CXXFLAGS="${CXXFLAGS} -Wlogical-not-parentheses"
+export CXXFLAGS="${CXXFLAGS} -Wlogical-op"
+export CXXFLAGS="${CXXFLAGS} -Wlong-long"
+export CXXFLAGS="${CXXFLAGS} -Wlto-type-mismatch"
+export CXXFLAGS="${CXXFLAGS} -Wmain"
+export CXXFLAGS="${CXXFLAGS} -Wmaybe-uninitialized"
+export CXXFLAGS="${CXXFLAGS} -Wmemset-elt-size"
+export CXXFLAGS="${CXXFLAGS} -Wmemset-transposed-args"
+export CXXFLAGS="${CXXFLAGS} -Wmisleading-indentation"
+export CXXFLAGS="${CXXFLAGS} -Wmissing-braces"
+export CXXFLAGS="${CXXFLAGS} -Wmissing-declarations"
+export CXXFLAGS="${CXXFLAGS} -Wmissing-field-initializers"
+export CXXFLAGS="${CXXFLAGS} -Wmissing-format-attribute"
+export CXXFLAGS="${CXXFLAGS} -Wmissing-include-dirs"
+export CXXFLAGS="${CXXFLAGS} -Wmissing-noreturn"
+# not for C++
+#export CXXFLAGS="${CXXFLAGS} -Wmissing-parameter-type"
+#export CXXFLAGS="${CXXFLAGS} -Wmissing-prototypes"
+export CXXFLAGS="${CXXFLAGS} -Wmultichar"
+# ignoring
+#export CXXFLAGS="${CXXFLAGS} -Wmultiple-inheritance"
+# ignoring
+#export CXXFLAGS="${CXXFLAGS} -Wnamespaces"
+export CXXFLAGS="${CXXFLAGS} -Wnarrowing"
+# not for C++
+#export CXXFLAGS="${CXXFLAGS} -Wnested-externs"
+export CXXFLAGS="${CXXFLAGS} -Wnoexcept"
+export CXXFLAGS="${CXXFLAGS} -Wnoexcept-type"
+export CXXFLAGS="${CXXFLAGS} -Wnon-template-friend"
+export CXXFLAGS="${CXXFLAGS} -Wnon-virtual-dtor"
+export CXXFLAGS="${CXXFLAGS} -Wnonnull"
+export CXXFLAGS="${CXXFLAGS} -Wnonnull-compare"
+#export CXXFLAGS="${CXXFLAGS} -Wnormalized"
+export CXXFLAGS="${CXXFLAGS} -Wnormalized=nfkc"
+export CXXFLAGS="${CXXFLAGS} -Wnull-dereference"
+export CXXFLAGS="${CXXFLAGS} -Wodr"
+export CXXFLAGS="${CXXFLAGS} -Wold-style-cast"
+# not for C++
+#export CXXFLAGS="${CXXFLAGS} -Wold-style-declaration"
+#export CXXFLAGS="${CXXFLAGS} -Wold-style-definition"
+export CXXFLAGS="${CXXFLAGS} -Wopenmp-simd"
+export CXXFLAGS="${CXXFLAGS} -Woverflow"
+export CXXFLAGS="${CXXFLAGS} -Woverlength-strings"
+export CXXFLAGS="${CXXFLAGS} -Woverloaded-virtual"
+# not for C++
+#export CXXFLAGS="${CXXFLAGS} -Woverride-init"
+#export CXXFLAGS="${CXXFLAGS} -Woverride-init-side-effects"
+export CXXFLAGS="${CXXFLAGS} -Wpacked"
+export CXXFLAGS="${CXXFLAGS} -Wpacked-bitfield-compat"
+# +++ may be need fix in future?
+#export CXXFLAGS="${CXXFLAGS} -Wpadded"
+export CXXFLAGS="${CXXFLAGS} -Wparentheses"
+export CXXFLAGS="${CXXFLAGS} -Wpedantic"
+export CXXFLAGS="${CXXFLAGS} -Wplacement-new"
+#export CXXFLAGS="${CXXFLAGS} -Wplacement-new="
+export CXXFLAGS="${CXXFLAGS} -Wpmf-conversions"
+export CXXFLAGS="${CXXFLAGS} -Wpointer-arith"
+export CXXFLAGS="${CXXFLAGS} -Wpointer-compare"
+# not for C++
+#export CXXFLAGS="${CXXFLAGS} -Wpointer-sign"
+#export CXXFLAGS="${CXXFLAGS} -Wpointer-to-int-cast"
+export CXXFLAGS="${CXXFLAGS} -Wpragmas"
+# not for C++
+#export CXXFLAGS="${CXXFLAGS} -Wproperty-assign-default"
+#export CXXFLAGS="${CXXFLAGS} -Wprotocol"
+export CXXFLAGS="${CXXFLAGS} -Wpsabi"
+#export CXXFLAGS="${CXXFLAGS} -Wreal-q-constant"
+#export CXXFLAGS="${CXXFLAGS} -Wrealloc-lhs"
+#export CXXFLAGS="${CXXFLAGS} -Wrealloc-lhs-all"
+export CXXFLAGS="${CXXFLAGS} -Wredundant-decls"
+export CXXFLAGS="${CXXFLAGS} -Wregister"
+export CXXFLAGS="${CXXFLAGS} -Wreorder"
+export CXXFLAGS="${CXXFLAGS} -Wrestrict"
+export CXXFLAGS="${CXXFLAGS} -Wreturn-local-addr"
+export CXXFLAGS="${CXXFLAGS} -Wreturn-type"
+export CXXFLAGS="${CXXFLAGS} -Wscalar-storage-order"
+# not for C++
+#export CXXFLAGS="${CXXFLAGS} -Wselector"
+export CXXFLAGS="${CXXFLAGS} -Wsequence-point"
+export CXXFLAGS="${CXXFLAGS} -Wshadow"
+# not for C++
+#export CXXFLAGS="${CXXFLAGS} -Wshadow-ivar"
+export CXXFLAGS="${CXXFLAGS} -Wshift-count-negative"
+export CXXFLAGS="${CXXFLAGS} -Wshift-count-overflow"
+export CXXFLAGS="${CXXFLAGS} -Wshift-negative-value"
+export CXXFLAGS="${CXXFLAGS} -Wshift-overflow"
+#export CXXFLAGS="${CXXFLAGS} -Wshift-overflow="
+export CXXFLAGS="${CXXFLAGS} -Wsign-compare"
+# +++ need fix in future
+#export CXXFLAGS="${CXXFLAGS} -Wsign-conversion"
+export CXXFLAGS="${CXXFLAGS} -Wsign-promo"
+export CXXFLAGS="${CXXFLAGS} -Wsized-deallocation"
+export CXXFLAGS="${CXXFLAGS} -Wsizeof-array-argument"
+# still missing in fedora
+#export CXXFLAGS="${CXXFLAGS} -Wsizeof-pointer-div"
+export CXXFLAGS="${CXXFLAGS} -Wsizeof-pointer-memaccess"
+export CXXFLAGS="${CXXFLAGS} -Wstack-protector"
+#export CXXFLAGS="${CXXFLAGS} -Wstack-usage="
+export CXXFLAGS="${CXXFLAGS} -Wstrict-aliasing"
+#export CXXFLAGS="${CXXFLAGS} -Wstrict-aliasing="
+export CXXFLAGS="${CXXFLAGS} -Wstrict-null-sentinel"
+# used before
+#export CXXFLAGS="${CXXFLAGS} -Wstrict-overflow"
+#export CXXFLAGS="${CXXFLAGS} -Wstrict-overflow="
+# not for C++
+#export CXXFLAGS="${CXXFLAGS} -Wstrict-prototypes"
+export CXXFLAGS="${CXXFLAGS} -Wstringop-overflow=4"
+#export CXXFLAGS="${CXXFLAGS} -Wstrict-selector-match"
+export CXXFLAGS="${CXXFLAGS} -Wsubobject-linkage"
+# +++ ignoring
+#export CXXFLAGS="${CXXFLAGS} -Wsuggest-attribute=const"
+#export CXXFLAGS="${CXXFLAGS} -Wsuggest-attribute=format"
+export CXXFLAGS="${CXXFLAGS} -Wsuggest-attribute=noreturn"
+# +++ ignoring
+#export CXXFLAGS="${CXXFLAGS} -Wsuggest-attribute=pure"
+#export CXXFLAGS="${CXXFLAGS} -Wsuggest-final-methods"
+#export CXXFLAGS="${CXXFLAGS} -Wsuggest-final-types"
+export CXXFLAGS="${CXXFLAGS} -Wsuggest-override"
+# not for C++
+#export CXXFLAGS="${CXXFLAGS} -Wsurprising"
+export CXXFLAGS="${CXXFLAGS} -Wswitch"
+export CXXFLAGS="${CXXFLAGS} -Wswitch-bool"
+export CXXFLAGS="${CXXFLAGS} -Wswitch-default"
+export CXXFLAGS="${CXXFLAGS} -Wswitch-enum"
+export CXXFLAGS="${CXXFLAGS} -Wswitch-unreachable"
+export CXXFLAGS="${CXXFLAGS} -Wsync-nand"
+export CXXFLAGS="${CXXFLAGS} -Wsynth"
+# ignoring
+#export CXXFLAGS="${CXXFLAGS} -Wsystem-headers"
+# not for C++
+#export CXXFLAGS="${CXXFLAGS} -Wtabs"
+#export CXXFLAGS="${CXXFLAGS} -Wtarget-lifetime"
+export CXXFLAGS="${CXXFLAGS} -Wtautological-compare"
+# ignoring
+#export CXXFLAGS="${CXXFLAGS} -Wtemplates"
+export CXXFLAGS="${CXXFLAGS} -Wterminate"
+# not for C++
+#export CXXFLAGS="${CXXFLAGS} -Wtraditional"
+#export CXXFLAGS="${CXXFLAGS} -Wtraditional-conversion"
+export CXXFLAGS="${CXXFLAGS} -Wtrampolines"
+export CXXFLAGS="${CXXFLAGS} -Wtrigraphs"
+export CXXFLAGS="${CXXFLAGS} -Wtype-limits"
+# not for C++
+#export CXXFLAGS="${CXXFLAGS} -Wundeclared-selector"
+export CXXFLAGS="${CXXFLAGS} -Wundef"
+# not for C++
+#export CXXFLAGS="${CXXFLAGS} -Wundefined-do-loop"
+# not for C++
+#export CXXFLAGS="${CXXFLAGS} -Wunderflow"
+export CXXFLAGS="${CXXFLAGS} -Wuninitialized"
+export CXXFLAGS="${CXXFLAGS} -Wunknown-pragmas"
+export CXXFLAGS="${CXXFLAGS} -Wunreachable-code"
+# +++ may be try use in future?
+#export CXXFLAGS="${CXXFLAGS} -Wunsafe-loop-optimizations"
+# not for C++
+#export CXXFLAGS="${CXXFLAGS} -Wunsuffixed-float-constants"
+export CXXFLAGS="${CXXFLAGS} -Wunused"
+export CXXFLAGS="${CXXFLAGS} -Wunused-but-set-parameter"
+export CXXFLAGS="${CXXFLAGS} -Wunused-but-set-variable"
+export CXXFLAGS="${CXXFLAGS} -Wunused-const-variable=1"
+# not for C++
+#export CXXFLAGS="${CXXFLAGS} -Wunused-dummy-argument"
+export CXXFLAGS="${CXXFLAGS} -Wunused-function"
+export CXXFLAGS="${CXXFLAGS} -Wunused-label"
+export CXXFLAGS="${CXXFLAGS} -Wunused-local-typedefs"
+export CXXFLAGS="${CXXFLAGS} -Wunused-macros"
+export CXXFLAGS="${CXXFLAGS} -Wunused-parameter"
+export CXXFLAGS="${CXXFLAGS} -Wunused-result"
+export CXXFLAGS="${CXXFLAGS} -Wunused-value"
+export CXXFLAGS="${CXXFLAGS} -Wunused-variable"
+# not for C++
+#export CXXFLAGS="${CXXFLAGS} -Wuse-without-only"
+# +++ need from time to time
+#export CXXFLAGS="${CXXFLAGS} -Wuseless-cast"
+export CXXFLAGS="${CXXFLAGS} -Wvarargs"
+export CXXFLAGS="${CXXFLAGS} -Wvariadic-macros"
+export CXXFLAGS="${CXXFLAGS} -Wvector-operation-performance"
+export CXXFLAGS="${CXXFLAGS} -Wvirtual-inheritance"
+export CXXFLAGS="${CXXFLAGS} -Wvirtual-move-assign"
+export CXXFLAGS="${CXXFLAGS} -Wvla"
+#export CXXFLAGS="${CXXFLAGS} -Wvla-larger-than="
+export CXXFLAGS="${CXXFLAGS} -Wvolatile-register-var"
+export CXXFLAGS="${CXXFLAGS} -Wwrite-strings"
+export CXXFLAGS="${CXXFLAGS} -Wzero-as-null-pointer-constant"
+# not for C++
+#export CXXFLAGS="${CXXFLAGS} -Wzerotrip"
+#export CXXFLAGS="${CXXFLAGS} -frequire-return-statement"
diff --git a/tools/ci/jobs/gccsnapshot.sh b/tools/ci/jobs/gccsnapshot.sh
index b9b677fd8..00e7a9944 100755
--- a/tools/ci/jobs/gccsnapshot.sh
+++ b/tools/ci/jobs/gccsnapshot.sh
@@ -11,6 +11,10 @@ if [ "$NEWCXX" != "" ]; then
     export CXX="$NEWCXX"
 fi
 
+if [ "$FLAGS" == "" ]; then
+    export FLAGS="gccsnapshot.sh"
+fi
+
 export PATH=/usr/lib/gcc-snapshot/bin:$PATH
 
 source ./tools/ci/scripts/init.sh
@@ -20,7 +24,7 @@ export CXXFLAGS="$CXXFLAGS -pedantic -ggdb3 -O2 -pipe -Wstrict-aliasing=2 \
 -std=gnu++1z -Wformat=1 \
 -Wno-attributes -fno-omit-frame-pointer"
 
-source ./tools/ci/flags/gccsnapshot.sh
+source ./tools/ci/flags/${FLAGS}
 
 export CXXFLAGS="$CXXFLAGS $POST_CXXFLAGS"
 
diff --git a/tools/ci/jobs/gccsnapshot_sanitize_tests.sh b/tools/ci/jobs/gccsnapshot_sanitize_tests.sh
index 7568d455e..d831291e9 100755
--- a/tools/ci/jobs/gccsnapshot_sanitize_tests.sh
+++ b/tools/ci/jobs/gccsnapshot_sanitize_tests.sh
@@ -10,6 +10,10 @@ if [ "$NEWCXX" != "" ]; then
     export CXX="$NEWCXX"
 fi
 
+if [ "$FLAGS" == "" ]; then
+    export FLAGS="gccsnapshot.sh"
+fi
+
 export LOGFILE=gcc-snapshot.log
 export PATH=/usr/lib/gcc-snapshot/bin:$PATH
 
@@ -28,7 +32,7 @@ export CXXFLAGS="$CXXFLAGS -pedantic -ggdb3 -O2 -pipe -Wstrict-aliasing=2 \
 -std=gnu++1z -Wformat=1 \
 -Wno-attributes"
 
-source ./tools/ci/flags/gcc6.sh
+source ./tools/ci/flags/${FLAGS}
 
 export CXXFLAGS="$CXXFLAGS $POST_CXXFLAGS"
 
diff --git a/tools/ci/jobs/gccsnapshot_sdl2.sh b/tools/ci/jobs/gccsnapshot_sdl2.sh
index 6a5cc68bb..82ad35c5b 100755
--- a/tools/ci/jobs/gccsnapshot_sdl2.sh
+++ b/tools/ci/jobs/gccsnapshot_sdl2.sh
@@ -10,6 +10,10 @@ if [ "$NEWCXX" != "" ]; then
     export CXX="$NEWCXX"
 fi
 
+if [ "$FLAGS" == "" ]; then
+    export FLAGS="gccsnapshot.sh"
+fi
+
 export LOGFILE=gcc-snapshot.log
 export PATH=/usr/lib/gcc-snapshot/bin:$PATH
 
@@ -20,7 +24,7 @@ export CXXFLAGS="$CXXFLAGS -pedantic -ggdb3 -O2 -pipe -Wstrict-aliasing=2 \
 -std=gnu++1z -Wformat=1 \
 -Wno-attributes -fno-omit-frame-pointer"
 
-source ./tools/ci/flags/gccsnapshot.sh
+source ./tools/ci/flags/${FLAGS}
 
 export CXXFLAGS="$CXXFLAGS $POST_CXXFLAGS"
 
diff --git a/tools/ci/jobs/gccsnapshot_tests.sh b/tools/ci/jobs/gccsnapshot_tests.sh
index 7105356c9..a97e65142 100755
--- a/tools/ci/jobs/gccsnapshot_tests.sh
+++ b/tools/ci/jobs/gccsnapshot_tests.sh
@@ -10,6 +10,10 @@ if [ "$NEWCXX" != "" ]; then
     export CXX="$NEWCXX"
 fi
 
+if [ "$FLAGS" == "" ]; then
+    export FLAGS="gccsnapshot.sh"
+fi
+
 export LOGFILE=gcc-snapshot.log
 export PATH=/usr/lib/gcc-snapshot/bin:$PATH
 
@@ -20,7 +24,7 @@ export CXXFLAGS="$CXXFLAGS -pedantic -ggdb3 -O2 -pipe -Wstrict-aliasing=2 \
 -std=gnu++1z -Wformat=1 \
 -Wno-attributes"
 
-source ./tools/ci/flags/gcc6.sh
+source ./tools/ci/flags/${FLAGS}
 
 export CXXFLAGS="$CXXFLAGS $POST_CXXFLAGS"