Hi, I've created a sparc solaris installation of ghc-6.12.3 using gcc-4.3.3 However, when I try to compile the simplest source with on older gcc-3.4.4 I get the link error below, but only for the threaded rts! With ghc-6.12.1 and gcc-4.x.y (x < 3) I did not have such a problem when switching to a machine that only has gcc-3.4.4. Does anybody have an explanation or proposal to fix this? Thanks Christian Linking Hello ... /home/pub-bkb/ghc/ghc-6.12.3/lib/ghc-6.12.3/libHSrts_thr.a(GC.thr_o): In function `scavenge_until_all_done': GC.c:(.text+0x178): undefined reference to `__emutls_get_address' GC.c:(.text+0x204): undefined reference to `__emutls_get_address' GC.c:(.text+0x250): undefined reference to `__emutls_get_address' GC.c:(.text+0x27c): undefined reference to `__emutls_get_address' GC.c:(.text+0x338): undefined reference to `__emutls_get_address' /home/pub-bkb/ghc/ghc-6.12.3/lib/ghc-6.12.3/libHSrts_thr.a(GC.thr_o):GC.c:(.text+0x408): more undefined references to `__emutls_get_address' follow collect2: ld returned 1 exit status -bash-3.00$ gcc -v Reading specs from /export/local/lang/bin/../lib/gcc/sparc-sun-solaris2.10/3.4.4/specs Configured with: ../gcc-3.4.4/configure --prefix=/usr/local/lang -program-suffix=_3.4.4 --with-gnu-as --with-as=/usr/local/bin/gnu-as --with-ld=/usr/ccs/bin/ld --enable-version-specific-runtime-libs --enable-languages=c,c++,f77 : (reconfigured) ../gcc-3.4.4/configure --prefix=/usr/local/lang -program-suffix=_3.4.4_s10 --with-as=/usr/ccs/bin/as --with-ld=/usr/ccs/bin/ld --enable-version-specific-runtime-libs --enable-languages=c,c++,f77 : (reconfigured) ../gcc-3.4.4/configure --prefix=/usr/local/lang -program-suffix=_3.4.4 --with-gnu-as --with-as=/usr/local/bin/gnu-as --with-gnu-ld --with-ld=/usr/local/bin/gnu-ld --enable-version-specific-runtime-libs --enable-languages=c,c++,f77: (reconfigured) ../gcc-3.4.4/configure --prefix=/usr/local/lang -program-suffix=_3.4.4_s10 --with-gnu-as --with-as=/usr/local/bin/gnu-as --with-gnu-ld --with-ld=/usr/local/bin/gnu-ld --enable-version-specific-runtime-libs --enable-languages=c,c++,f77 Thread model: posix gcc version 3.4.4 gcc used for Building ghc-6.12.3 Using built-in specs. Target: sparc-sun-solaris2.8 Configured with: ../gcc-4.3.3/configure --prefix=/opt/csw/gcc4 --exec-prefix=/opt/csw/gcc4 --with-gnu-as --with-as=/opt/csw/bin/gas --without-gnu-ld --with-ld=/usr/ccs/bin/ld --enable-nls --with-included-gettext --with-libiconv-prefix=/opt/csw --with-x --with-mpfr=/opt/csw --with-gmp=/opt/csw --enable-java-awt=xlib --enable-libada --enable-libssp --enable-objc-gc --enable-threads=posix --enable-stage1-languages=c --enable-languages=ada,c,c++,fortran,java,objc Thread model: posix gcc version 4.3.3 (GCC)