Question

After reading about the problem of passing empty std::string objects between DLLs and EXEs, I am concerned about the configure options used to build my gcc / libstdc++. More specific I want to know if --enable-fully-dynamic-string was used during ./configure.

I’m using MinGW 4.4.0 on Windows XP.

1. Does anybody know the configuration used to build this release?

2. Is there a general way to find this information for any installation of GNU gcc? The gcc manual gives me no hint on this topic.

Thanks for your input!

Answer 1

gcc -v prints out the configuration options among other stuff:

$ gcc -v
Using built-in specs.
Target: i686-pc-cygwin
Configured with: /gnu/gcc/releases/packaging/4.3.4-3/gcc4-4.3.4-3/src/gcc-4.3.4/
configure --srcdir=/gnu/gcc/releases/packaging/4.3.4-3/gcc4-4.3.4-3/src/gcc-4.3.
4 --prefix=/usr --exec-prefix=/usr --bindir=/usr/bin --sbindir=/usr/sbin --libex
ecdir=/usr/lib --datadir=/usr/share --localstatedir=/var --sysconfdir=/etc --inf
odir=/usr/share/info --mandir=/usr/share/man --datadir=/usr/share --infodir=/usr
/share/info --mandir=/usr/share/man -v --with-gmp=/usr --with-mpfr=/usr --enable
-bootstrap --enable-version-specific-runtime-libs --with-slibdir=/usr/bin --libe
xecdir=/usr/lib --enable-static --enable-shared --enable-shared-libgcc --disable
-__cxa_atexit --with-gnu-ld --with-gnu-as --with-dwarf2 --disable-sjlj-exception
s --enable-languages=ada,c,c++,fortran,java,objc,obj-c++ --disable-symvers --ena
ble-libjava --program-suffix=-4 --enable-libgomp --enable-libssp --enable-libada
 --enable-threads=posix --with-arch=i686 --with-tune=generic --enable-libgcj-sub
libs CC=gcc-4 CXX=g++-4 CC_FOR_TARGET=gcc-4 CXX_FOR_TARGET=g++-4 GNATMAKE_FOR_TA
RGET=gnatmake GNATBIND_FOR_TARGET=gnatbind AS=/opt/gcc-tools/bin/as.exe AS_FOR_T
ARGET=/opt/gcc-tools/bin/as.exe LD=/opt/gcc-tools/bin/ld.exe LD_FOR_TARGET=/opt/
gcc-tools/bin/ld.exe --with-ecj-jar=/usr/share/java/ecj.jar
Thread model: posix
gcc version 4.3.4 20090804 (release) 1 (GCC)