Which standard library implementation is used?

[Alex Vinokur]

How can we know which standard library implementation is used while compiling?

--- e.cpp ---
int main () {return 0:}
-------------

$ g++ -v e.cpp
Reading specs from /usr/lib/gcc-lib/i686-pc-cygwin/3.3.1/specs
Configured with: /GCC/gcc-3.3.1-3/configure --with-gcc --with-gnu-ld --with-gnu-
as --prefix=/usr --exec-prefix=/usr --sysconfdir=/etc --libdir=/usr/lib --libexe
cdir=/usr/sbin --mandir=/usr/share/man --infodir=/usr/share/info --enable-langua
ges=c,ada,c++,f77,pascal,java,objc --enable-libgcj --enable-threads=posix --with
-system-zlib --enable-nls --without-included-gettext --enable-interpreter --enab
le-sjlj-exceptions --disable-version-specific-runtime-libs --enable-shared --dis
able-win32-registry --enable-java-gc=boehm --disable-hash-synchronization --verb
ose --target=i686-pc-cygwin --host=i686-pc-cygwin --build=i686-pc-cygwin
Thread model: posix
gcc version 3.3.1 (cygming special)
 /usr/lib/gcc-lib/i686-pc-cygwin/3.3.1/cc1plus.exe -quiet -v -D__GNUC__=3 -D__GN
UC_MINOR__=3 -D__GNUC_PATCHLEVEL__=1 -D__CYGWIN32__ -D__CYGWIN__ -Dunix -D__unix
__ -D__unix -idirafter /usr/lib/gcc-lib/i686-pc-cygwin/3.3.1/../../../../include
/w32api -idirafter /usr/lib/gcc-lib/i686-pc-cygwin/3.3.1/../../../../i686-pc-cyg
win/lib/../../include/w32api e.cpp -D__GNUG__=3 -quiet -dumpbase e.cpp -auxbase
e -version -o /cygdrive/c/DOCUME~1/ADMINI~1/LOCALS~1/Temp/ccKkKfcb.s
GNU C++ version 3.3.1 (cygming special) (i686-pc-cygwin)
 compiled by GNU C version 3.3.1 (cygming special).
GGC heuristics: --param ggc-min-expand=64 --param ggc-min-heapsize=65470
ignoring nonexistent directory "/usr/local/include"
ignoring nonexistent directory "/usr/i686-pc-cygwin/include"
ignoring duplicate directory "/usr/i686-pc-cygwin/lib/../../include/w32api"
#include "..." search starts here:
#include <...> search starts here:
 /usr/include/c++/3.3.1
 /usr/include/c++/3.3.1/i686-pc-cygwin
 /usr/include/c++/3.3.1/backward
 /usr/lib/gcc-lib/i686-pc-cygwin/3.3.1/include
 /usr/include
 /usr/include/w32api
End of search list.
 /usr/lib/gcc-lib/i686-pc-cygwin/3.3.1/../../../../i686-pc-cygwin/bin/as.exe --t
raditional-format -o /cygdrive/c/DOCUME~1/ADMINI~1/LOCALS~1/Temp/ccI7Zpfj.o /cyg
drive/c/DOCUME~1/ADMINI~1/LOCALS~1/Temp/ccKkKfcb.s
 /usr/lib/gcc-lib/i686-pc-cygwin/3.3.1/collect2.exe -Bdynamic --dll-search-prefi
x=cyg /usr/lib/gcc-lib/i686-pc-cygwin/3.3.1/../../../crt0.o /usr/lib/gcc-lib/i68
6-pc-cygwin/3.3.1/crtbegin.o -L/usr/lib/gcc-lib/i686-pc-cygwin/3.3.1 -L/usr/lib/
gcc-lib/i686-pc-cygwin/3.3.1/../../.. /cygdrive/c/DOCUME~1/ADMINI~1/LOCALS~1/Tem
p/ccI7Zpfj.o -lstdc++ -lgcc -lcygwin -luser32 -lkernel32 -ladvapi32 -lshell32 -l
gcc /usr/lib/gcc-lib/i686-pc-cygwin/3.3.1/crtend.o



-- 
   Alex Vinokur
     http://mathforum.org/library/view/10978.html
     http://sourceforge.net/users/alexvn