PR ada/58239
gnattools/
	* Makefile.in (CXX_LFLAGS): New.
	(TOOLS_FLAGS_TO_PASS_NATIVE): Pass CXX and CXX_LFLAGS.
	(TOOLS_FLAGS_TO_PASS_RE): Likewise.
	(TOOLS_FLAGS_TO_PASS_CROSS): Pass CXX.
gcc/ada/
	* gcc-interface/Makefile.in (GCC_LINK_FLAGS): Add -static-libstdc++.
	(GCC_LINK): Use CXX instead of CC.
	* gcc-interface/Make-lang.in (CXX_LFLAGS): New.
	(ADA_TOOLS_FLAGS_TO_PASS): Pass CXX, and CXX_LFLAGS for native.

Co-Authored-By: Iain Sandoe <iain@codesourcery.com>

From-SVN: r202150