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Date:	Fri, 28 Mar 2014 10:00:03 +0100 (CET)
From:	tonioc AT free DOT fr
To:	cygwin AT cygwin DOT com
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Subject:	Re: does using mingw-gcc require to compile all libraries with it?
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Hello, 
I just installed mingw-gcc-4.7.3 on top of my cygwin installation. 

Trying to build a library that needs openssl lib, I get undefined references to __errno and __getreent from this library. 
- I understood those variables are from cygwin1.dll, is it correct? 
- does this mean that I should build libcrypto on my own from sources using mingw-gcc also ? (and same for any other lib currently available in my cygwin installation? 
- or am I missing some option in my build ? 

Note: I get the same lib correctly built with : 
- mingw standalone toolchain, but I'd rather use mingw-gcc in cycgwin if possible. 
- cygwin's gcc, but running a JNI lib that uses printf or other stdio stuff hangs the VM. 

regards. 

----------------------- 
$ /bin/i686-pc-mingw32-gcc.exe -Wl,--add-stdcall-alias obj/myobj.o /lib/libcrypto.a /lib/libz.a /lib/gcc/i686-pc-mingw32/4.7.3/libstdc++.a -shared -o libwin/jnat1357.dll -v
Utilisation des specs internes.
COLLECT_GCC=/bin/i686-pc-mingw32-gcc
COLLECT_LTO_WRAPPER=/bin/../lib/gcc/i686-pc-mingw32/4.7.3/lto-wrapper.exe
Target: i686-pc-mingw32
Configuré avec: /usr/src/packages/mingw-gcc/32/mingw-gcc-4.7.3-1/src/gcc-4.7.3/configure --srcdir=/usr/src/packages/mingw-gcc/32/mingw-gcc-4.7.3-1/src/gcc-4.7.3 --prefix=/usr --exec-prefix=/usr --bindir=/usr/bin --sbindir=/usr/sbin --libexecdir=/usr/lib --datadir=/usr/share --localstatedir=/var --sysconfdir=/etc --datarootdir=/usr/share --docdir=/usr/share/doc/mingw-gcc -C --build=i686-pc-cygwin --host=i686-pc-cygwin --target=i686-pc-mingw32 --without-libiconv-prefix --without-libintl-prefix --with-sysroot=/usr/i686-pc-mingw32/sys-root --with-build-sysroot=/usr/i686-pc-mingw32/sys-root --enable-languages=c,c++,ada,fortran,objc,obj-c++ --disable-sjlj-exceptions --with-dwarf2 --enable-shared --enable-libgomp --disable-win32-registry --enable-libstdcxx-debug --disable-build-poststage1-with-cxx --enable-version-specific-runtime-libs --disable-multilib --enable-decimal-float=bid --disable-werror --enable-lto
Modèle de thread: win32
gcc version 4.7.3 (GCC)
LIBRARY_PATH=/bin/../lib/gcc/i686-pc-mingw32/4.7.3/:/bin/../lib/gcc/:/usr/i686-pc-mingw32/sys-root/mingw/lib/ 
COLLECT_GCC_OPTIONS='-shared' '-o' 'mylib.dll' '-v' '-mtune=generic' '-march=pentiumpro' 
/bin/../lib/gcc/i686-pc-mingw32/4.7.3/collect2.exe --sysroot=/usr/i686-pc-mingw32/sys-root --shared -Bdynamic -e _DllMainCRTStartup AT 12 --enable-auto-image-base -o mylib.dll /usr/i686-pc-mingw32/sys-root/mingw/lib/dllcrt2.o /bin/../lib/gcc/i686-pc-mingw32/4.7.3/crtbegin.o -L/bin/../lib/gcc/i686-pc-mingw32/4.7.3 -L/bin/../lib/gcc -L/usr/i686-pc-mingw32/sys-root/mingw/lib --add-stdcall-alias obj/myobj.o /lib/libcrypto.a /lib/libz.a /lib/gcc/i686-pc-mingw32/4.7.3/libstdc++.a -lmingw32 -lgcc_eh -lgcc -lmoldname -lmingwex -lmsvcrt -ladvapi32 -lshell32 -luser32 -lkernel32 -lmingw32 -lgcc_eh -lgcc -lmoldname -lmingwex -lmsvcrt /bin/../lib/gcc/i686-pc-mingw32/4.7.3/crtend.o 
/lib/libcrypto.a(cryptlib.o):cryptlib.c:(.text+0x211): référence indéfinie vers « __errno » 
/lib/libcrypto.a(cryptlib.o):cryptlib.c:(.text+0x559): référence indéfinie vers « __getreent » 
/lib/libcrypto.a(cryptlib.o):cryptlib.c:(.text+0xc24): référence indéfinie vers « __getreent »

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