Continuing my work on Solaris packages, I came across a new problem. I'm trying to compile the following code: #include <iosfwd> int main(void) { } The result: $ /opt/csw/gcc4/bin/sparc-sun-solaris2.10-g++ 1.cpp 1.cpp:1:18: fatal error: iosfwd: No such file or directory compilation terminated. The file is there on the file system: $ ls -l /opt/csw/gcc4/include/c++/*/iosfwd -rw-r--r-- 1 root bin 6917 Aug 21 04:39 /opt/csw/gcc4/include/c++/4.6.1/iosfwd Looking at the truss output, gcc tries to locate the header in wrong places: 22203: stat64("/opt/csw/lib/gcc/sparc-sun-solaris2.10/4.6.1/include/iosfwd.gch", 0xFFBFF038) Err#2 ENOENT 22203: open64("/opt/csw/lib/gcc/sparc-sun-solaris2.10/4.6.1/include/iosfwd", O_RDONLY|O_NOCTTY) Err#2 ENOENT 22203: stat64("/opt/csw/gcc4/include/iosfwd.gch", 0xFFBFF038) Err#2 ENOENT 22203: open64("/opt/csw/gcc4/include/iosfwd", O_RDONLY|O_NOCTTY) Err#2 ENOENT 22203: stat64("/opt/csw/lib/gcc/sparc-sun-solaris2.10/4.6.1/include-fixed/iosfwd.gch", 0xFFBFF038) Err#2 ENOENT 22203: open64("/opt/csw/lib/gcc/sparc-sun-solaris2.10/4.6.1/include-fixed/iosfwd", O_RDONLY|O_NOCTTY) Err#2 ENOENT 22203: stat64("/usr/include/iosfwd.gch", 0xFFBFF038) Err#2 ENOENT 22203: open64("/usr/include/iosfwd", O_RDONLY|O_NOCTTY) Err#2 ENOENT Where is the problem - are the header files misplaced, or is g++ looking in the wrong place? Is there a recommended fix? The build description is here: https://gar.svn.sourceforge.net/svnroot/gar/csw/mgar/pkg/gcc4/branches/bootstrap-4.6/Makefile My guess would be that the location of the header files is driven by the --prefix or --includedir setting. In my build the setting was: --prefix=/opt/csw/gcc4 --includedir=/opt/csw/gcc4/include ...and other locations: --exec_prefix=/opt/csw/gcc4 --bindir=/opt/csw/gcc4/bin --sbindir=/opt/csw/gcc4/sbin --libexecdir=/opt/csw/gcc4/libexec --datadir=/opt/csw/gcc4/share --sysconfdir=/etc/opt/csw/gcc4 --sharedstatedir=/opt/csw/gcc4/share --localstatedir=/var/opt/csw/gcc4 --libdir=/opt/csw/lib --infodir=/opt/csw/gcc4/share/info --mandir=/opt/csw/gcc4/share/man Are the above settings sensible? Maciej