Rename CLANG_CC, CLANG_CXX configuration vars (avoid clash with scan-build)

Clang's scan-build tool uses the CLANG_CXX environment variable (setting it up
in the scan-build script to pass it to the ccc-analyzer script), but happens to
erroneously set it to a non-existing path (see <https://reviews.llvm.org/D89481>
"[scan-build] Fix clang++ pathname again").  So wrapping LO's autogen.sh and
make in scan-build picked up that broken CLANG_CXX and caused build
failures like

> [CXX] external/skia/source/SkMemory_malloc.cxx
> /bin/sh: ~/llvm/inst/bin/clang-12++: No such file or directory

(see
<https://lists.freedesktop.org/archives/libreoffice/2020-October/086113.html>
"Re: llvm/clang static analyzer reports").

So rename CLANG_CXX, and for consistency also CLANG_CC and the various
CLANG_CXXFLAGS_INTRINSICS_*, by prefixing each with LO_.

Change-Id: Ib41cabe940f8bfb1997f74e865cca5725f859e07
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/104383
Tested-by: Jenkins
Reviewed-by: Stephan Bergmann <sbergman@redhat.com>

0 files changed, 0 insertions, 0 deletions