[Bug libstdc++/54630] New: GCC 4.8 --enable-languages=c build fails: Undefined symbols: ___cxa_guard_acquire and ___cxa_guard_release

["baker at usgs dot gov" <gcc-bugzilla@gcc.gnu.org>]

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

             Bug #: 54630
           Summary: GCC 4.8 --enable-languages=c build fails: Undefined
                    symbols: ___cxa_guard_acquire and ___cxa_guard_release
    Classification: Unclassified
           Product: gcc
           Version: 4.8.0
            Status: UNCONFIRMED
          Severity: blocker
          Priority: P3
         Component: libstdc++
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: baker@usgs.gov


Created attachment 28222
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=28222
Download, configure, and build gcc 4.8 for ColdFire uClinux

Build of 4.8 20120909 snapshot
(http://fossies.org/unix/misc/gcc-4.8-20120909.tar.gz) fails for
--enable-languages=c:

g++ -c  -DIN_GCC_FRONTEND -g -O2 -DIN_GCC -DCROSS_DIRECTORY_STRUCTURE 
-fno-exceptions -fno-rtti -W -Wall -Wwrite-strings -Wcast-qual
-Wmissing-format-attribute -pedantic -Wno-long-long -Wno-variadic-macros
-Wno-overlength-strings -fno-common  -DHAVE_CONFIG_H -I. -I.
-I/tmp/freescale-coldfile-xgcc/cross-gcc-4.8-20120909/../gcc-4.8-20120909/gcc
-I/tmp/freescale-coldfile-xgcc/cross-gcc-4.8-20120909/../gcc-4.8-20120909/gcc/.
-I/tmp/freescale-coldfile-xgcc/cross-gcc-4.8-20120909/../gcc-4.8-20120909/gcc/../include
-I/tmp/freescale-coldfile-xgcc/cross-gcc-4.8-20120909/../gcc-4.8-20120909/gcc/../libcpp/include

-I/tmp/freescale-coldfile-xgcc/cross-gcc-4.8-20120909/../gcc-4.8-20120909/gcc/../libdecnumber
-I/tmp/freescale-coldfile-xgcc/cross-gcc-4.8-20120909/../gcc-4.8-20120909/gcc/../libdecnumber/dpd
-I../libdecnumber    cc1-checksum.c -o cc1-checksum.o
gcc   -g -O2 -DIN_GCC -DCROSS_DIRECTORY_STRUCTURE  -fno-exceptions -fno-rtti -W
-Wall -Wwrite-strings -Wcast-qual -Wmissing-format-attribute -pedantic
-Wno-long-long -Wno-variadic-macros -Wno-overlength-strings -fno-common 
-DHAVE_CONFIG_H  -o cc1 c/c-lang.o c-family/stub-objc.o attribs.o c/c-errors.o
c/c-decl.o c/c-typeck.o c/c-convert.o c/c-aux-info.o c/c-objc-common.o
c/c-parser.o c-family/c-common.o c-family/c-cppbuiltin.o c-family/c-dump.o
c-family/c-format.o c-family/c-gimplify.o c-family/c-lex.o c-family/c-omp.o
c-family/c-opts.o c-family/c-pch.o c-family/c-ppoutput.o c-family/c-pragma.o
c-family/c-pretty-print.o c-family/c-semantics.o c-family/c-ada-spec.o
tree-mudflap.o default-c.o \
      cc1-checksum.o libbackend.a main.o tree-browser.o libcommon-target.a
libcommon.a ../libcpp/libcpp.a ../libdecnumber/libdecnumber.a libcommon.a
../libcpp/libcpp.a  -liconv ../libiberty/libiberty.a
../libdecnumber/libdecnumber.a -static-libgcc -static-libstdc++ -lm  -lmpc
-lmpfr -lgmp  -static-libgcc -static-libstdc++ -lm -L../zlib -lz
Undefined symbols:
  "___cxa_guard_acquire", referenced from:
      coalesce_ssa_name()     in libbackend.a(tree-ssa-coalesce.o)
  "___cxa_guard_release", referenced from:
      coalesce_ssa_name()     in libbackend.a(tree-ssa-coalesce.o)
ld: symbol(s) not found
collect2: ld returned 1 exit status
make[2]: *** [cc1] Error 1
make[1]: *** [all-gcc] Error 2
make: *** [all] Error 2

It looks to me like: now that GCC is implemented in C++, certain libstdc++
functions are needed, but are not compiled when --enable-languages=c.

Attached are instructions to replicate my build.