[Bug middle-end/54630] [4.8 Regression] GCC 4.8 --enable-languages=c build fails: Undefined symbols: ___cxa_guard_acquire and ___cxa_guard_release

[baker at usgs dot gov]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54630

--- Comment #6 from Larry Baker <baker at usgs dot gov> 2012-09-21 20:34:41 UTC ---
I'm looking at CFLAGS_FOR_BUILD and CXXFLAGS_FOR_BUILD as a way to pass
-static-libgcc and -static-libstdc++ to the linker, respectively.  In the
top-level generated Makefile, I noticed that CXXFLAGS_FOR_BUILD is not included
in the list of variables in BASE_FLAGS_TO_PASS:

# Flags to pass down to all sub-makes.
BASE_FLAGS_TO_PASS = \
:

Whereas, CC_FOR_BUILD, CFLAGS_FOR_BUILD, and CXX_FOR_BUILD are included.

Is this an oversight?

And, the description of EXTRA_BUILD_FLAGS makes it sound like it should also
include the CXX variants:

# These variables must be set on the make command line for directories
# built for the build system to override those in BASE_FLAGS_TO_PASSS.
EXTRA_BUILD_FLAGS = \
    CFLAGS="$(CFLAGS_FOR_BUILD)" \
    LDFLAGS="$(LDFLAGS_FOR_BUILD)"

(P.S. BASE_FLAGS_TO_PASSS is misspelled.)