I just added "objc,obj-c++" to my list of languages to be built with gcc. I also added my configure option "--program-suffix=-4.5.1" so I can call, e.g., "gcc-4.5.1 pgog.c". After installation, I was surprised to see no reference to either new language when i executed: ls -ld /usr/local/bin/*4.5.1* Here are the results: -rwxr-xr-x 4 root root 298991 Aug 11 16:48 /usr/local/bin/c++-4.5.1 -rwxr-xr-x 1 root root 295179 Aug 11 16:48 /usr/local/bin/cpp-4.5.1 -rwxr-xr-x 4 root root 298991 Aug 11 16:48 /usr/local/bin/g++-4.5.1 -rwxr-xr-x 2 root root 294852 Aug 11 16:48 /usr/local/bin/gcc-4.5.1 -rwxr-xr-x 1 root root 15936 Aug 11 16:48 /usr/local/bin/gccbug-4.5.1 -rwxr-xr-x 1 root root 37014 Aug 11 16:48 /usr/local/bin/gcov-4.5.1 -rwxr-xr-x 2 root root 299207 Aug 11 16:48 /usr/local/bin/gfortran-4.5.1 -rwxr-xr-x 4 root root 298991 Aug 11 16:48 /usr/local/bin/x86_64-unknown-linux-gnu-c++-4.5.1 -rwxr-xr-x 4 root root 298991 Aug 11 16:48 /usr/local/bin/x86_64-unknown-linux-gnu-g++-4.5.1 -rwxr-xr-x 2 root root 294852 Aug 11 16:48 /usr/local/bin/x86_64-unknown-linux-gnu-gcc-4.5.1 -rwxr-xr-x 2 root root 299207 Aug 11 16:48 /usr/local/bin/x86_64-unknown-linux-gnu-gfortran-4.5.1 I expected to see also something like: -rwxr-xr-x 2 root root 294852 Aug 11 16:48 /usr/local/bin/gobjc-4.5.1 -rwxr-xr-x 2 root root 294852 Aug 11 16:48 /usr/local/bin/gobjc++-4.5.1 ... When I went back to the gcc docs, I saw that I have to use the -x <language> option to gcc to compile Objective-C and Objective-C++ or use the automatic language compilation selection by using the appropriate program source file name extenstion: gcc progsrc.m -lobjc # Objectice-C gcc progsrc.mm -lobjc # Objective-C++ or gcc -x objective-c progsrc.txt -lobjc gcc -x objective-c++ progsrc.txt -lobjc Some questions, please: 1. Why no specific name for the two languages? 2. Why the extra set of executables with the longer names, e.g., x86_64-unknown-linux-gnu-gfortran-4.5.1? 3. Why does the library libobjc have to be explicitly linked when it is mandatory? Thanks, -Tom Thomas M. Browder, Jr. Niceville, Florida USA
