gmake: CXXFLAGS override gb_Library_add_cxxflags

[Matúš Kukan]

On 10 January 2013 09:16, Stephan Bergmann <sbergman at redhat.com> wrote:
> Ah, so Petr's "IMHO, it would make sense to use CXXFLAGS after the default
> global flags but before the source file specific flags" sounds reasonable to
> me.

See https://gerrit.libreoffice.org/#/c/1632/ for a reasonable easy way
to do this.
It should work, etc.
But it may break PCH_CXXFLAGS. I don't feel like testing --enable-pch build.

HTH,
Matus