Hi there, I am trying to install from the source R-2.4.0 on my mac (osx 10.4.8 G5 DP) The error imply Tcl/Tk. I install it by all the way I know: darwinport, the Tcl/Tk package from the dmg available from CRAN but without success. The PATH is correct. tclConfig.sh is localised in /opt/local/lib and have those permission: -rw-r--r-- 2 root admin 7K Oct 9 09:49 tclConfig.sh Here is the error produce by ./configure CFLAGS='-O3 -faltivec -fgcse- sm -funroll-loops -fstrict-aliasing -fsched-interblock -falign- loops=16 -falign-jumps=16 -falign-functions=16 -malign-natural - freorder-blocks -freorder-blocks-and-partition -mpowerpc-gfxopt - mpowerpc-gpopt -fstrict-aliasing -ftree-vectorize -mtune=G5 -mcpu=G5' FFLAGS='-O3 -faltivec -fgcse-sm -funroll-loops -fstrict-aliasing - fsched-interblock -falign-loops=16 -falign-jumps=16 -falign- functions=16 -malign-natural -freorder-blocks -freorder-blocks-and- partition -mpowerpc-gfxopt -mpowerpc-gpopt -fstrict-aliasing -ftree- vectorize -mtune=G5 -mcpu=G5' [...] checking for tclConfig.sh... /opt/local/lib/tclConfig.sh checking for tkConfig.sh... no checking for tkConfig.sh in library (sub)directories... /usr/local/ lib/tkConfig.sh checking /opt/local/include/tcl8.4/generic/tcl.h usability... no checking /opt/local/include/tcl8.4/generic/tcl.h presence... no checking for /opt/local/include/tcl8.4/generic/tcl.h... no checking /opt/local/include/tcl8.4/tcl.h usability... no checking /opt/local/include/tcl8.4/tcl.h presence... no checking for /opt/local/include/tcl8.4/tcl.h... no checking /opt/local/include/tcl.h usability... yes checking /opt/local/include/tcl.h presence... yes checking for /opt/local/include/tcl.h... yes checking /usr/local/include/tk8.4/generic/tk.h usability... no checking /usr/local/include/tk8.4/generic/tk.h presence... no checking for /usr/local/include/tk8.4/generic/tk.h... no checking /usr/local/include/tk8.4/tk.h usability... no checking /usr/local/include/tk8.4/tk.h presence... no checking for /usr/local/include/tk8.4/tk.h... no checking /usr/local/include/tcl8.4/tk.h usability... no checking /usr/local/include/tcl8.4/tk.h presence... no checking for /usr/local/include/tcl8.4/tk.h... no checking /usr/local/include/tk.h usability... no checking /usr/local/include/tk.h presence... yes configure: WARNING: /usr/local/include/tk.h: present but cannot be compiled configure: WARNING: /usr/local/include/tk.h: check for missing prerequisite headers? configure: WARNING: /usr/local/include/tk.h: see the Autoconf documentation configure: WARNING: /usr/local/include/tk.h: section "Present But Cannot Be Compiled" configure: WARNING: /usr/local/include/tk.h: proceeding with the preprocessor's result configure: WARNING: /usr/local/include/tk.h: in the future, the compiler will take precedence configure: WARNING: ## ----------------------------------- ## configure: WARNING: ## Report this to r-bugs at R-project.org ## configure: WARNING: ## ----------------------------------- ## checking for /usr/local/include/tk.h... yes checking whether compiling/linking Tcl/Tk code works... no [...] Then after it goes all right until the end and then produce a error in the make step: make[4]: `libintl.a' is up to date. gcc -I. -I../../src/include -I../../src/include -I/usr/local/include - DHAVE_CONFIG_H -fPIC -O3 -faltivec -fgcse-sm -funroll-loops - fstrict-aliasing -fsched-interblock -falign-loops=16 -falign-jumps=16 -falign-functions=16 -malign-natural -freorder-blocks -freorder- blocks-and-partition -mpowerpc-gfxopt -mpowerpc-gpopt -fstrict- aliasing -ftree-vectorize -mtune=G5 -mcpu=G5 -c cpoly.c -o cpoly.o cpoly.c: In function 'fxshft': cpoly.c:292: error: expected identifier or '(' before 'unsigned' [...] make[3]: *** [cpoly.o] Error 1 make[2]: *** [R] Error 2 make[1]: *** [R] Error 1 make: *** [R] Error 1 I try lot of things but I run out of idea. Any idea would be really helpful... David