[Bug bootstrap/70519] New: genmatch fails to compile under gcc-5.2.0 - missing '-lstdc++' .

[jason.vas.dias at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70519

            Bug ID: 70519
           Summary: genmatch fails to compile under gcc-5.2.0 - missing
                    '-lstdc++' .
           Product: gcc
           Version: 5.3.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: bootstrap
          Assignee: unassigned at gcc dot gnu.org
          Reporter: jason.vas.dias at gmail dot com
  Target Milestone: ---

I am trying to build gcc-5.3.0 with gcc-5.2.0 , on an x86-64 (Haswell) Linux
box, and am getting this unexpected compilation failure building the unmodified
gcc-5.3.0 source after configuration,  with 'make' :
<quote><pre>
/usr/build/linux/gcc-5.3.0/./prev-gcc/xg++
-B/usr/build/linux/gcc-5.3.0/./prev-gcc/ -B/usr/x86_64-pc-linux-gnu/bin/
-nostdinc++
-B/usr/build/linux/gcc-5.3.0/prev-x86_64-pc-linux-gnu/libstdc++-v3/src/.libs
-B/usr/build/linux/gcc-5.3.0/prev-x86_64-pc-linux-gnu/libstdc++-v3/libsupc++/.libs

-I/usr/build/linux/gcc-5.3.0/prev-x86_64-pc-linux-gnu/libstdc++-v3/include/x86_64-pc-linux-gnu
 -I/usr/build/linux/gcc-5.3.0/prev-x86_64-pc-linux-gnu/libstdc++-v3/include 
-I/usr/os_src/gcc-5.3.0/libstdc++-v3/libsupc++
-L/usr/build/linux/gcc-5.3.0/prev-x86_64-pc-linux-gnu/libstdc++-v3/src/.libs
-L/usr/build/linux/gcc-5.3.0/prev-x86_64-pc-linux-gnu/libstdc++-v3/libsupc++/.libs
  -g -O2 -gtoggle -DIN_GCC    -fno-exceptions -fno-rtti
-fasynchronous-unwind-tables -W -Wall -Wno-narrowing -Wwrite-strings
-Wcast-qual -Wmissing-format-attribute -Woverloaded-virtual -pedantic
-Wno-long-long -Wno-variadic-macros -Wno-overlength-strings   -DHAVE_CONFIG_H
-DGENERATOR_FILE -static-libstdc++ -static-libgcc  -o build/genmatch \
    build/genmatch.o ../libcpp/libcpp.a ../libiberty/libiberty.a build/errors.o
build/vec.o build/hash-table.o .././libiberty/libiberty.a  
build/genmatch.o: In function `lower_cond(operand*) [clone .constprop.91]':
genmatch.c:(.text+0xc7a): undefined reference to `operator new(unsigned long)'
genmatch.c:(.text+0xe2e): undefined reference to `operator new(unsigned long)'
genmatch.c:(.text+0x125d): undefined reference to `operator new(unsigned long)'
genmatch.c:(.text+0x146b): undefined reference to `operator new(unsigned long)'
genmatch.c:(.text+0x15ef): undefined reference to `operator new(unsigned long)'
build/genmatch.o:genmatch.c:(.text+0x17b5): more undefined references to
`operator new(unsigned long)' follow
build/genmatch.o: In function `main':
genmatch.c:(.text.startup+0x6015): undefined reference to `operator
delete(void*)'
genmatch.c:(.text.startup+0x60d6): undefined reference to `operator
new(unsigned long)'
genmatch.c:(.text.startup+0x6148): undefined reference to `operator
new(unsigned long)'
collect2: error: ld returned 1 exit status
Makefile:2613: recipe for target 'build/genmatch' failed
</pre></quote>

Adding '-lstdc++' to the xg++ command above enables it to succeed .
Why the missing '-lstdc++' ?  Intentional ? An error ? 
Only when compiling under 5.2.0 ?
I can check in a Makefile.in patch if it would help ...