Remove -fno-elide-constructors (because it's broken in gcc trunk and …

…will be obsolete once elision becomes mandatory).

compile-config

@@ -1,4 +1,4 @@
 GCC="/usr/local/bin/g++"
 CLANG="/usr/local/bin/clang++"
-GCC_COMPILE_FLAGS="-finput-charset=UTF-8 -pedantic-errors -Wfatal-errors -Wall -Wextra -Wno-unused-but-set-variable -Wno-empty-body -Wno-missing-field-initializers -Wwrite-strings -Wno-deprecated -Wno-unused-parameter -Wno-unused-variable -Wno-non-virtual-dtor -Wno-variadic-macros -fno-diagnostics-show-option -fno-use-linker-plugin -fmessage-length=0 -ftemplate-depth-128 -fno-merge-constants -fno-nonansi-builtins -fno-gnu-keywords -fno-elide-constructors -fstrict-aliasing -fstack-protector-all -Winvalid-pch -D_GLIBCXX_DEBUG -D_GLIBCXX_DEBUG_PEDANTIC -Wno-deprecated -Winit-self -Wno-unused-value -fno-diagnostics-show-caret"
-CLANG_COMPILE_FLAGS="-finput-charset=UTF-8 -pedantic-errors -Wfatal-errors -Wall -Wextra -Wno-empty-body -Wno-missing-field-initializers -Wwrite-strings -Wno-deprecated -Wno-unused-parameter -Wno-unused-variable -Wno-non-virtual-dtor -Wno-variadic-macros -fno-diagnostics-show-option -fmessage-length=0 -ftemplate-depth-128 -fno-gnu-keywords -fno-elide-constructors -fstrict-aliasing -fstack-protector-all -Winvalid-pch -D_GLIBCXX_DEBUG -D_GLIBCXX_DEBUG_PEDANTIC -Wno-deprecated -Winit-self -fsanitize=undefined -fdiagnostics-parseable-fixits -Wno-unused-value"
+GCC_COMPILE_FLAGS="-finput-charset=UTF-8 -pedantic-errors -Wfatal-errors -Wall -Wextra -Wno-unused-but-set-variable -Wno-empty-body -Wno-missing-field-initializers -Wwrite-strings -Wno-deprecated -Wno-unused-parameter -Wno-unused-variable -Wno-non-virtual-dtor -Wno-variadic-macros -fno-diagnostics-show-option -fno-use-linker-plugin -fmessage-length=0 -ftemplate-depth-128 -fno-merge-constants -fno-nonansi-builtins -fno-gnu-keywords -fstrict-aliasing -fstack-protector-all -Winvalid-pch -D_GLIBCXX_DEBUG -D_GLIBCXX_DEBUG_PEDANTIC -Wno-deprecated -Winit-self -Wno-unused-value -fno-diagnostics-show-caret"
+CLANG_COMPILE_FLAGS="-finput-charset=UTF-8 -pedantic-errors -Wfatal-errors -Wall -Wextra -Wno-empty-body -Wno-missing-field-initializers -Wwrite-strings -Wno-deprecated -Wno-unused-parameter -Wno-unused-variable -Wno-non-virtual-dtor -Wno-variadic-macros -fno-diagnostics-show-option -fmessage-length=0 -ftemplate-depth-128 -fno-gnu-keywords -fstrict-aliasing -fstack-protector-all -Winvalid-pch -D_GLIBCXX_DEBUG -D_GLIBCXX_DEBUG_PEDANTIC -Wno-deprecated -Winit-self -fsanitize=undefined -fdiagnostics-parseable-fixits -Wno-unused-value"