[Mingw-users] Default includes via specs-file (cleanest solution?)

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Hi there,

so I'm currently using a mingw + msys installation for a while and I'm
really enjoying it so far.
But there is one thing that I just can't get working:

I like to keep my compiled/installed libraries inside the msys
directory/root (default PREFIX=/usr/local/) instead of putting them in
PREFIX=/mingw.
The wiki suggests using /mingw because mingw-gcc does not include msys
folders as default search paths (which is fine), but my intention behind
using
(the default) PREFIX=/usr/local/ when running ./configure is, to make
configure-scripts find already installed 3rd party libs easier.
Also, this way "base-mingw" include/libs are more "cleanly" seperated from
msys/3rd party include/libs.

Up until now I was mainly using CPATH, C_INCLUDE_PATH, CPLUS_INCLUDE_PATH
and LD_LIBRARY_PATH (Just to be sure, also CFLAGS, LDFLAGS) as msys
env-variables
to make msys include/libs available to mingw-gcc, but I do think, while
beeing a working solution, its definitly far from beeing the cleanest one,
especially I did read that using LD_LIBRARY_PATH is a bad/'not so good'
idea.

Now I think, that using a specs file should be a cleaner solution (only
drawback might be, that I'll also be using msys includes, when not running
mingw-gcc from within msys).

Thus I followed the wiki instructions:
 * gcc -dumpspecs > C:/MinGW/msys/1.0/lib/gcc/mingw32/4.6.1/specs
   (non where overwriten)
 * Added to specs file:
   |- - - - -
   | *local_prefix:
   | C:/MinGW/msys/1.0/local/
   |
   | *local_includes:
   | -I%(local_prefix)include
   |
   | *local_lib_search:
   | -L%(local_prefix)lib
   |- - - - -
 * Replaced lines with:
   |- - - - -
   | *cpp:
   | %{posix:-D_POSIX_SOURCE} %{mthreads:-D_MT} %(local_includes)
   |
   | *link_libgcc:
   | %D %(local_lib_search)
   |
   | *cc1plus:
   | %(local_includes)
   |- - - - -

But somehow gcc/g++ seems to use the spec file, but still does not use the
new include/lib paths. Here is how I tested this, what I did was create a
"TestInclude.h" (empty) inside /local/include (msys) folder and another
file Main.cpp somehwere else:
 |- - - - -
 | // Using <> to make gcc/g++ use its search paths
 | #include <TestInclude.h>
 |
 | int main(int argc, char *argv[]) {
 |   return 0;
 | }
 |- - - - -
I then tried to compile with "g++ Main.cpp -o Main", which gave me
"...fatal error: testInclude.h: No such file or directory",
while compiling via "g++ Main.cpp -o Main -I'/include'" works perfectly
fine. (so, C:/MinGW/msys/1.0/local/include was not added to the search
paths)

Any idea, why adding include/libs via specs file does not seem to be
working for me?

ATTACHMENTS:

Here is the output of "g++ Main.cpp -o Main --verbose":
- - - - -
Reading specs from c:/mingw/bin/../lib/gcc/mingw32/4.6.1/specs
COLLECT_GCC=C:\MinGW\bin\g++.exe
COLLECT_LTO_WRAPPER=c:/mingw/bin/../libexec/gcc/mingw32/4.6.1/lto-wrapper.exe
Target: mingw32
Configured with: ../gcc-4.6.1/configure
--enable-languages=c,c++,fortran,objc,obj-c++ --disable-sjlj-exceptions
--with-dwarf2 --enable-shared --enable-libgomp --disable-win32-registry
--enable-libstdcxx-debug --enable-version-specific-runtime-libs
--build=mingw32 --prefix=/mingw
Thread model: win32
gcc version 4.6.1 (GCC)
COLLECT_GCC_OPTIONS='-o' 'Main.exe' '-v' '-shared-libgcc' '-mtune=i386'
'-march=i386'
 c:/mingw/bin/../libexec/gcc/mingw32/4.6.1/cc1plus.exe -quiet -v -iprefix
c:\mingw\bin\../lib/gcc/mingw32/4.6.1/ Main.cpp -quiet -dumpbase Main.cpp
-mtune=i386 -march=i386 -auxbase Main -version -o
C:\Users\COMMAN~1\AppData\Local\Temp\cchNj44P.s
GNU C++ (GCC) version 4.6.1 (mingw32)
        compiled by GNU C version 4.6.1, GMP version 5.0.1, MPFR version
2.4.1, MPC version 0.8.1
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
ignoring nonexistent directory
"c:\mingw\bin\../lib/gcc/mingw32/4.6.1/../../../../mingw32/include"
ignoring duplicate directory
"c:/mingw/lib/gcc/../../lib/gcc/mingw32/4.6.1/include/c++"
ignoring duplicate directory
"c:/mingw/lib/gcc/../../lib/gcc/mingw32/4.6.1/include/c++/mingw32"
ignoring duplicate directory
"c:/mingw/lib/gcc/../../lib/gcc/mingw32/4.6.1/include/c++/backward"
ignoring duplicate directory
"c:/mingw/lib/gcc/../../lib/gcc/mingw32/4.6.1/include"
ignoring duplicate directory
"/mingw/lib/gcc/mingw32/4.6.1/../../../../include"
ignoring duplicate directory "c:/mingw/lib/gcc/../../include"
ignoring duplicate directory
"c:/mingw/lib/gcc/../../lib/gcc/mingw32/4.6.1/include-fixed"
ignoring nonexistent directory
"c:/mingw/lib/gcc/../../lib/gcc/mingw32/4.6.1/../../../../mingw32/include"
ignoring duplicate directory "/mingw/include"
#include "..." search starts here:
#include <...> search starts here:
 c:\mingw\bin\../lib/gcc/mingw32/4.6.1/include/c++
 c:\mingw\bin\../lib/gcc/mingw32/4.6.1/include/c++/mingw32
 c:\mingw\bin\../lib/gcc/mingw32/4.6.1/include/c++/backward
 c:\mingw\bin\../lib/gcc/mingw32/4.6.1/include
 c:\mingw\bin\../lib/gcc/mingw32/4.6.1/../../../../include
 c:\mingw\bin\../lib/gcc/mingw32/4.6.1/include-fixed
End of search list.
GNU C++ (GCC) version 4.6.1 (mingw32)
        compiled by GNU C version 4.6.1, GMP version 5.0.1, MPFR version
2.4.1,
MPC version 0.8.1
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
Compiler executable checksum: 8e56a7b4b7f3db333ff95dd4b2d788a4
Main.cpp:1:25: fatal error: testInclude.h: No such file or directory
compilation terminated.
- - - - -
(no 'C:\MinGW\msys\1.0\local\include' in <...> search)

Here is the output of "g++ Main.cpp -o Main -I'/include' --verbose":
- - - - -
Reading specs from c:/mingw/bin/../lib/gcc/mingw32/4.6.1/specs
COLLECT_GCC=C:\MinGW\bin\g++.exe
COLLECT_LTO_WRAPPER=c:/mingw/bin/../libexec/gcc/mingw32/4.6.1/lto-wrapper.exe
Target: mingw32
Configured with: ../gcc-4.6.1/configure
--enable-languages=c,c++,fortran,objc,obj-c++ --disable-sjlj-exceptions
--with-dwarf2 --enable-shared --enable-libgomp --disable-win32-registry
--enable-libstdcxx-debug --enable-version-specific-runtime-libs
--build=mingw32 --prefix=/mingwThread model: win32
gcc version 4.6.1 (GCC)
COLLECT_GCC_OPTIONS='-o' 'Main.exe' '-I' 'C:/MinGW/msys/1.0/include' '-v'
'-shared-libgcc' '-mtune=i386' '-march=i386'
 c:/mingw/bin/../libexec/gcc/mingw32/4.6.1/cc1plus.exe -quiet -v -I
C:/MinGW/msys/1.0/include -iprefix c:\mingw\bin\../lib/gcc/mingw32/4.6.1/
Main.cpp -quiet -dumpbase Main.cpp -mtune=i386 -march=i386 -auxbase Main
-version -o C:\Users\COMMAN~1\AppData\Local\Temp\cczVhfsu.s
GNU C++ (GCC) version 4.6.1 (mingw32)
        compiled by GNU C version 4.6.1, GMP version 5.0.1, MPFR version
2.4.1,
MPC version 0.8.1
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
ignoring nonexistent directory
"c:\mingw\bin\../lib/gcc/mingw32/4.6.1/../../../../mingw32/include"
ignoring duplicate directory
"c:/mingw/lib/gcc/../../lib/gcc/mingw32/4.6.1/include/c++"
ignoring duplicate directory
"c:/mingw/lib/gcc/../../lib/gcc/mingw32/4.6.1/include/c++/mingw32"
ignoring duplicate directory
"c:/mingw/lib/gcc/../../lib/gcc/mingw32/4.6.1/include/c++/backward"
ignoring duplicate directory
"c:/mingw/lib/gcc/../../lib/gcc/mingw32/4.6.1/include"
ignoring duplicate directory
"/mingw/lib/gcc/mingw32/4.6.1/../../../../include"
ignoring duplicate directory "c:/mingw/lib/gcc/../../include"
ignoring duplicate directory
"c:/mingw/lib/gcc/../../lib/gcc/mingw32/4.6.1/include-fixed"
ignoring nonexistent directory
"c:/mingw/lib/gcc/../../lib/gcc/mingw32/4.6.1/../../../../mingw32/include"
ignoring duplicate directory "/mingw/include"
#include "..." search starts here:
#include <...> search starts here:
 C:/MinGW/msys/1.0/local/include
 c:\mingw\bin\../lib/gcc/mingw32/4.6.1/include/c++
 c:\mingw\bin\../lib/gcc/mingw32/4.6.1/include/c++/mingw32
 c:\mingw\bin\../lib/gcc/mingw32/4.6.1/include/c++/backward
 c:\mingw\bin\../lib/gcc/mingw32/4.6.1/include
 c:\mingw\bin\../lib/gcc/mingw32/4.6.1/../../../../include
 c:\mingw\bin\../lib/gcc/mingw32/4.6.1/include-fixed
End of search list.
GNU C++ (GCC) version 4.6.1 (mingw32)
        compiled by GNU C version 4.6.1, GMP version 5.0.1, MPFR version
2.4.1,
MPC version 0.8.1
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
Compiler executable checksum: 8e56a7b4b7f3db333ff95dd4b2d788a4
...
- - - - -
('C:\MinGW\msys\1.0\local\include' in <...> search)

[Mingw-users] Default includes via specs-file (cleanest solution?)

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[Mingw-users] Default includes via specs-file (cleanest solution?)