The gcc version 4.4.0 20080511 (experimental) (GCC) when compiled with these
options:

----------------
$ gcc -v
Using built-in specs.
Target: x86_64-pc-linux-gnu
Configured with: ../../../gcc-SVN-20080511/gcc-SVN-20080511/configure
--build=x86_64-pc-linux-gnu --prefix=/usr/local/opt/MDL/opt/gcc-4.4
--exec-prefix=/usr/local/opt/MDL/opt/gcc-4.4 --sysconfdir=/etc
--libdir=/usr/local/opt/MDL/opt/gcc-4.4/lib64
--libexecdir=/usr/local/opt/MDL/opt/gcc-4.4/libexec64
--includedir=/usr/local/opt/MDL/opt/gcc-4.4/include
--infodir=/usr/local/opt/MDL/opt/gcc-4.4/share/info
--mandir=/usr/local/opt/MDL/opt/gcc-4.4/share/man --program-suffix=-4.4
--sharedstatedir=/var --localstatedir=/var --enable-languages=c,c++,fortran
--enable-generated-files-in-srcdir --enable-targets=all --disable-libada
--enable-libssp --disable-werror --enable-shared --enable-static
--enable-parallel-mark --with-gnu-ld --disable-werror-always --enable-multilib
--enable-threads=posix --enable-tls --disable-rpath
--enable-version-specific-runtime-libs --with-demangler-in-ld --with-gnu-as
--with-x --disable-coverage --disable-checking --enable-visibility
--with-arch=core2
Thread model: posix
gcc version 4.4.0 20080511 (experimental) (GCC)
----------------

generates wrong paths in the search list:

----------------
$ gcc -print-search-dirs
install:
/usr/local/opt/MDL/opt/gcc-4.4/lib64/gcc/x86_64-pc-linux-gnu/4.4.0x86_64-pc-linux-gnu/4.4.0/
programs:
=/usr/local/opt/MDL/opt/gcc-4.4/lib64/gcc/x86_64-pc-linux-gnu/../../libexec64/gcc/x86_64-pc-linux-gnu/4.4.0/:/usr/local/opt/MDL/opt/gcc-4.4/lib64/gcc/x86_64-pc-linux-gnu/../../libexec64/gcc/:/usr/local/opt/MDL/opt/gcc-4.4/libexec64/gcc/x86_64-pc-linux-gnu/4.4.0/x86_64-pc-linux-gnu/4.4.0/:/usr/local/opt/MDL/opt/gcc-4.4/libexec64/gcc/x86_64-pc-linux-gnu/4.4.0/:/usr/libexec/gcc/x86_64-pc-linux-gnu/4.4.0/:/usr/libexec/gcc/x86_64-pc-linux-gnu/:/usr/lib/gcc/x86_64-pc-linux-gnu/4.4.0/:/usr/lib/gcc/x86_64-pc-linux-gnu/:/usr/local/opt/MDL/opt/gcc-4.4/lib64/gcc/x86_64-pc-linux-gnu/../../x86_64-pc-linux-gnu/bin/x86_64-pc-linux-gnu/4.4.0/:/usr/local/opt/MDL/opt/gcc-4.4/lib64/gcc/x86_64-pc-linux-gnu/../../x86_64-pc-linux-gnu/bin/
libraries:
=/usr/local/opt/MDL/opt/gcc-4.4/lib64/gcc/x86_64-pc-linux-gnu/4.4.0x86_64-pc-linux-gnu/4.4.0/:/usr/local/opt/MDL/opt/gcc-4.4/lib64/gcc/x86_64-pc-linux-gnu/4.4.0:/usr/local/opt/MDL/opt/gcc-4.4/lib64/gcc/x86_64-pc-linux-gnu/4.4.0/x86_64-pc-linux-gnu/4.4.0/:/usr/local/opt/MDL/opt/gcc-4.4/lib64/gcc/x86_64-pc-linux-gnu/4.4.0/../lib64/:/usr/local/opt/MDL/opt/gcc-4.4/lib64/gcc/x86_64-pc-linux-gnu/4.4.0/32/x86_64-pc-linux-gnu/4.4.0/:/usr/local/opt/MDL/opt/gcc-4.4/lib64/gcc/x86_64-pc-linux-gnu/4.4.0/32/../lib64/:/usr/local/opt/MDL/opt/gcc-4.4/lib64/gcc/x86_64-pc-linux-gnu/lib64/x86_64-pc-linux-gnu/4.4.0/:/usr/local/opt/MDL/opt/gcc-4.4/lib64/gcc/x86_64-pc-linux-gnu/lib64/../lib64/:/usr/local/opt/MDL/opt/gcc-4.4/lib64/gcc/x86_64-pc-linux-gnu/lib32/x86_64-pc-linux-gnu/4.4.0/:/usr/local/opt/MDL/opt/gcc-4.4/lib64/gcc/x86_64-pc-linux-gnu/lib32/../lib64/:/usr/local/opt/MDL/lib64/x86_64-pc-linux-gnu/4.4.0/:/usr/local/opt/MDL/lib64/../lib64/:/usr/local/opt/MDL/lib32/x86_64-pc-linux-gnu/4.4.0/:/usr/local/opt/MDL/lib32/../lib64/:/lib64/x86_64-pc-linux-gnu/4.4.0/:/lib64/../lib64/:/lib32/x86_64-pc-linux-gnu/4.4.0/:/lib32/../lib64/:/usr/lib64/x86_64-pc-linux-gnu/4.4.0/:/usr/lib64/../lib64/:/usr/lib32/x86_64-pc-linux-gnu/4.4.0/:/usr/lib32/../lib64/:/usr/local/lib64/x86_64-pc-linux-gnu/4.4.0/:/usr/local/lib64/../lib64/:/usr/local/lib32/x86_64-pc-linux-gnu/4.4.0/:/usr/local/lib32/../lib64/:/usr/X11R6/lib64/x86_64-pc-linux-gnu/4.4.0/:/usr/X11R6/lib64/../lib64/:/usr/X11R6/lib32/x86_64-pc-linux-gnu/4.4.0/:/usr/X11R6/lib32/../lib64/:/usr/lib/gcc/x86_64-pc-linux-gnu/4.4.0/:/usr/local/opt/MDL/opt/gcc-4.4/lib64/gcc/x86_64-pc-linux-gnu/../../x86_64-pc-linux-gnu/lib/x86_64-pc-linux-gnu/4.4.0/:/usr/local/opt/MDL/opt/gcc-4.4/lib64/gcc/x86_64-pc-linux-gnu/../../x86_64-pc-linux-gnu/lib/../lib64/:/usr/local/opt/MDL/opt/gcc-4.4/lib64/gcc/x86_64-pc-linux-gnu/../x86_64-pc-linux-gnu/4.4.0/:/usr/local/opt/MDL/opt/gcc-4.4/lib64/gcc/x86_64-pc-linux-gnu/../../lib64/:/lib/x86_64-pc-linux-gnu/4.4.0/:/lib/../lib64/:/usr/lib/x86_64-pc-linux-gnu/4.4.0/:/usr/lib/../lib64/:/usr/local/opt/MDL/opt/gcc-4.4/lib64/gcc/x86_64-pc-linux-gnu/4.4.0/:/usr/local/opt/MDL/opt/gcc-4.4/lib64/gcc/x86_64-pc-linux-gnu/4.4.0/32/:/usr/local/opt/MDL/opt/gcc-4.4/lib64/gcc/x86_64-pc-linux-gnu/lib64/:/usr/local/opt/MDL/opt/gcc-4.4/lib64/gcc/x86_64-pc-linux-gnu/lib32/:/usr/local/opt/MDL/lib64/:/usr/local/opt/MDL/lib32/:/lib64/:/lib32/:/usr/lib64/:/usr/lib32/:/usr/local/lib64/:/usr/local/lib32/:/usr/X11R6/lib64/:/usr/X11R6/lib32/:/usr/local/opt/MDL/opt/gcc-4.4/lib64/gcc/x86_64-pc-linux-gnu/../../x86_64-pc-linux-gnu/lib/:/usr/local/opt/MDL/opt/gcc-4.4/lib64/gcc/x86_64-pc-linux-gnu/../:/lib/:/usr/lib/
----------------

Here notice namely the "install:" line, where the tail seems to be somehow
strangely duplicated, creating a nonexisting directory. It should be
"/usr/local/opt/MDL/opt/gcc-4.4/lib64/gcc/x86_64-pc-linux-gnu/4.4.0/", instead
the last two subdirs are duplicated (even without a splitting slash) at the end
creating the nonsense that is there.

This results in a lot of trouble. The compiler is then for instance unable to
find any of its internal includes, such as when trying to compile the following
example:

----x.cc--------------
#include <streambuf>
int main () {return 0;}
---------------------

Then "g++ x.cc -o x -v" produces the following:

---------------------
$ gcc x.cc -o x -v
Using built-in specs.
Target: x86_64-pc-linux-gnu
Configured with: ../../../gcc-SVN-20080511/gcc-SVN-20080511/configure
--build=x86_64-pc-linux-gnu --prefix=/usr/local/opt/MDL/opt/gcc-4.4
--exec-prefix=/usr/local/opt/MDL/opt/gcc-4.4 --sysconfdir=/etc
--libdir=/usr/local/opt/MDL/opt/gcc-4.4/lib64
--libexecdir=/usr/local/opt/MDL/opt/gcc-4.4/libexec64
--includedir=/usr/local/opt/MDL/opt/gcc-4.4/include
--infodir=/usr/local/opt/MDL/opt/gcc-4.4/share/info
--mandir=/usr/local/opt/MDL/opt/gcc-4.4/share/man --program-suffix=-4.4
--sharedstatedir=/var --localstatedir=/var --enable-languages=c,c++,fortran
--enable-generated-files-in-srcdir --enable-targets=all --disable-libada
--enable-libssp --disable-werror --enable-shared --enable-static
--enable-parallel-mark --with-gnu-ld --disable-werror-always --enable-multilib
--enable-threads=posix --enable-tls --disable-rpath
--enable-version-specific-runtime-libs --with-demangler-in-ld --with-gnu-as
--with-x --disable-coverage --disable-checking --enable-visibility
--with-arch=core2
Thread model: posix
gcc version 4.4.0 20080511 (experimental) (GCC)
COLLECT_GCC_OPTIONS='-o' 'x' '-v' '-mtune=generic' '-march=core2'
 /usr/local/opt/MDL/opt/gcc-4.4/libexec64/gcc/x86_64-pc-linux-gnu/4.4.0/cc1plus
-quiet -v -iprefix
/usr/local/opt/MDL/opt/gcc-4.4/lib64/gcc/x86_64-pc-linux-gnu/4.4.0x86_64-pc-linux-gnu/4.4.0/
-D_GNU_SOURCE x.cc -quiet -dumpbase x.cc -mtune=generic -march=core2 -auxbase x
-version -o /tmp/ccTSZc1D.s
ignoring nonexistent directory
"/usr/local/opt/MDL/opt/gcc-4.4/lib64/gcc/x86_64-pc-linux-gnu/4.4.0x86_64-pc-linux-gnu/4.4.0/include/c++"
ignoring nonexistent directory
"/usr/local/opt/MDL/opt/gcc-4.4/lib64/gcc/x86_64-pc-linux-gnu/4.4.0x86_64-pc-linux-gnu/4.4.0/include/c++/x86_64-pc-linux-gnu"
ignoring nonexistent directory
"/usr/local/opt/MDL/opt/gcc-4.4/lib64/gcc/x86_64-pc-linux-gnu/4.4.0x86_64-pc-linux-gnu/4.4.0/include/c++/backward"
ignoring nonexistent directory
"/usr/local/opt/MDL/opt/gcc-4.4/lib64/gcc/x86_64-pc-linux-gnu/4.4.0x86_64-pc-linux-gnu/4.4.0/include"
ignoring nonexistent directory
"/usr/local/opt/MDL/opt/gcc-4.4/lib64/gcc/x86_64-pc-linux-gnu/4.4.0x86_64-pc-linux-gnu/4.4.0/include-fixed"
ignoring nonexistent directory
"/usr/local/opt/MDL/opt/gcc-4.4/lib64/gcc/x86_64-pc-linux-gnu/4.4.0x86_64-pc-linux-gnu/4.4.0/../../../../x86_64-pc-linux-gnu/include"
ignoring nonexistent directory
"/usr/local/opt/MDL/opt/gcc-4.4/lib64/gcc/x86_64-pc-linux-gnu/../../lib64/gcc/x86_64-pc-linux-gnu/4.4.0/include/c++"
ignoring nonexistent directory
"/usr/local/opt/MDL/opt/gcc-4.4/lib64/gcc/x86_64-pc-linux-gnu/../../lib64/gcc/x86_64-pc-linux-gnu/4.4.0/include/c++/x86_64-pc-linux-gnu"
ignoring nonexistent directory
"/usr/local/opt/MDL/opt/gcc-4.4/lib64/gcc/x86_64-pc-linux-gnu/../../lib64/gcc/x86_64-pc-linux-gnu/4.4.0/include/c++/backward"
ignoring nonexistent directory "/usr/local/include"
ignoring nonexistent directory
"/usr/local/opt/MDL/opt/gcc-4.4/lib64/gcc/x86_64-pc-linux-gnu/../../include"
ignoring nonexistent directory
"/usr/local/opt/MDL/opt/gcc-4.4/lib64/gcc/x86_64-pc-linux-gnu/../../lib64/gcc/x86_64-pc-linux-gnu/4.4.0/include"
ignoring nonexistent directory
"/usr/local/opt/MDL/opt/gcc-4.4/lib64/gcc/x86_64-pc-linux-gnu/../../lib64/gcc/x86_64-pc-linux-gnu/4.4.0/include-fixed"
ignoring nonexistent directory
"/usr/local/opt/MDL/opt/gcc-4.4/lib64/gcc/x86_64-pc-linux-gnu/../../lib64/gcc/x86_64-pc-linux-gnu/4.4.0/../../../../x86_64-pc-linux-gnu/include"
#include "..." search starts here:
#include <...> search starts here:
 /usr/local/opt/MDL/include
 /usr/local/opt/MDL/opt/gcc-4.4/lib64/gcc/x86_64-pc-linux-gnu/4.4.0/include
 /usr/include
End of search list.
GNU C++ (GCC) version 4.4.0 20080511 (experimental) (x86_64-pc-linux-gnu)
        compiled by GNU C version 4.4.0 20080511 (experimental), GMP version
4.2.2, MPFR version 2.3.1.
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
Compiler executable checksum: 3451a451b09bd8be04dfe86587d596a1
x.cc:1:21: error: streambuf: No such file or directory
---------------------


-- 
           Summary: Wrong search path generation
           Product: gcc
           Version: 4.4.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: preprocessor
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: martin dot drab at fjfi dot cvut dot cz


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36213

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