2012/5/1 Baruch Burstein <[email protected]>
> I just downloaded ruben's build of gcc 4.7.0 for 32-bit, but I think this
> question applies to other (all?) other builds, too.
>
> I tried compiling a program that links to opengl32, but got a linker error
> that the file wasn't found. In the "old" mingw32, libopengl32.a was in the
> lib folder. In this build it isn't. After searching for it I found it in
> 'i686-w64-mingw32\lib', along with what looks like many other important lib
> files. in 'i686-w64-mingw32' there is also an 'include' dir and a 'bin' dir
> with a few of the tools that are also in the main 'bin' dir such as 'ar',
> 'as', 'dlltool', 'strip' and a few others.
>
> What is this 'i686-w64-mingw32' folder, and why are some things
> separated/duplicated into it? Can I just merge it into the main
> lib/include/bin dirs, so that I can compile with the standard makefiles,
> without having to always adjust to add another include and lib folder?
>
Hi Baruch,
The directory structure is determined by binutils and gcc. An explanation:
- the i686-w64-mingw32/bin/* tools are part of binutils and placed there
for internal use of gcc. Do not use or touch these.
- the rest of i686-w64-mingw32 subfolder is a strict difference between
MinGW.org and MinGW-w64 toolchains. In both cases, GCC is configured to
search these directories automatically, and you should not have to add any
library paths manually whatsoever.
To better see what I mean, below the output of "gcc -v test.c -lopengl32 -o
test.exe" for my 4.7.0 (64-bit) build. Note that all the directories
containing headers and libraries are searched as appropriate (marked in
bold).
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=m:/development/mingw64/bin/../libexec/gcc/x86_64-w64-mingw32/4.7.0/lto-wrapper.exe
Target: x86_64-w64-mingw32
Configured with: /home/ruben/mingw-w64/toolchain/src/gcc/configure
--host=x86_64-w64-mingw32 --build=x86_64-linux-gnu
--target=x86_64-w64-mingw32
--with-sysroot=/home/ruben/mingw-w64/toolchain/mingw64mingw64/mingw64
--prefix=/home/ruben/mingw-w64/toolchain/mingw64mingw64/mingw64
--with-libiconv-prefix=/home/ruben/mingw-w64/toolchain/mingw64mingw64/prereq_install
--with-gmp=/home/ruben/mingw-w64/toolchain/mingw64mingw64/prereq_install
--with-mpfr=/home/ruben/mingw-w64/toolchain/mingw64mingw64/prereq_install
--with-mpc=/home/ruben/mingw-w64/toolchain/mingw64mingw64/prereq_install
--with-ppl=/home/ruben/mingw-w64/toolchain/mingw64mingw64/prereq_install
--with-cloog=/home/ruben/mingw-w64/toolchain/mingw64mingw64/prereq_install
--enable-cloog-backend=isl --with-host-libstdcxx='-static -lstdc++
-lm' --enable-shared --enable-static --enable-threads=win32
--disable-multilib --enable-plugins
--enable-languages=c,lto,c++,objc,obj-c++,fortran,java --enable-libgomp
--enable-libstdcxx-debug --enable-sjlj-exceptions
--enable-fully-dynamic-string --disable-nls --disable-werror
--enable-checking=release --with-pkgversion=rubenvb-4.7.0 --with-bug-url=
[email protected] --disable-win32-registry
--disable-rpath --disable-werror CFLAGS='-O2 -mtune=corei7
-fomit-frame-pointer -momit-leaf-frame-pointer -fgraphite-identity
-floop-interchange -floop-block -floop-parallelize-all' LDFLAGS=
Thread model: win32
gcc version 4.7.0 (rubenvb-4.7.0)
COLLECT_GCC_OPTIONS='-v' '-o' 'test.exe' '-mtune=generic' '-march=x86-64'
m:/development/mingw64/bin/../libexec/gcc/x86_64-w64-mingw32/4.7.0/cc1.exe
-quiet -v -iprefix
m:\development\mingw64\bin\../lib/gcc/x86_64-w64-mingw32/4.7.0/ -isysroot
m:\development\mingw64\bin\../../mingw64 -U_REENTRANT test.c -quiet
-dumpbase test.c -mtune=generic -march=x86-64 -auxbase test -version -o
R:\cc8IVxCr.s
GNU C (rubenvb-4.7.0) version 4.7.0 (x86_64-w64-mingw32)
compiled by GNU C version 4.7.0, GMP version 5.0.4, MPFR version
3.1.0, MPC version 0.9
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
ignoring duplicate directory
"m:/development/mingw64/lib/gcc/../../lib/gcc/x86_64-w64-mingw32/4.7.0/include"
ignoring nonexistent directory
"m:\development\mingw64\bin\../../mingw64/home/ruben/mingw-w64/toolchain/mingw64mingw64/mingw64/lib/gcc/x86_64-w64-mingw32/4.7.0/../../../../include"
ignoring duplicate directory
"m:/development/mingw64/lib/gcc/../../lib/gcc/x86_64-w64-mingw32/4.7.0/include-fixed"
ignoring duplicate directory
"m:/development/mingw64/lib/gcc/../../lib/gcc/x86_64-w64-mingw32/4.7.0/../../../../x86_64-w64-mingw32/include"
ignoring nonexistent directory
"m:\development\mingw64\bin\../../mingw64/mingw/include"
#include "..." search starts here:
*#include <...> search starts here:
m:\development\mingw64\bin\../lib/gcc/x86_64-w64-mingw32/4.7.0/include
m:\development\mingw64\bin\../lib/gcc/x86_64-w64-mingw32/4.7.0/include-fixed
m:\development\mingw64\bin\../lib/gcc/x86_64-w64-mingw32/4.7.0/../../../../x86_64-w64-mingw32/include
*
End of search list.
GNU C (rubenvb-4.7.0) version 4.7.0 (x86_64-w64-mingw32)
compiled by GNU C version 4.7.0, GMP version 5.0.4, MPFR version
3.1.0, MPC version 0.9
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
Compiler executable checksum: 234639675d8fe06d0df04426513490c4
COLLECT_GCC_OPTIONS='-v' '-o' 'test.exe' '-mtune=generic' '-march=x86-64'
m:/development/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.7.0/../../../../x86_64-w64-mingw32/bin/as.exe
-o R:\ccW8aWgR.o R:\cc8IVxCr.s
COMPILER_PATH=m:/development/mingw64/bin/../libexec/gcc/x86_64-w64-mingw32/4.7.0/;m:/development/mingw64/bin/../libexec/gcc/;m:/development/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.7.0/../../../../x86_64-w64-mingw32/bin/
*LIBRARY_PATH=*
m:/development/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.7.0/;m:/development/mingw64/bin/../lib/gcc/;
*
m:/development/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.7.0/../../../../x86_64-w64-mingw32/lib/../lib/
*
;m:/development/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.7.0/../../../../lib/;m:/development/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.7.0/../../../../x86_64-w64-mingw32/lib/;m:/development/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.7.0/../../../
COLLECT_GCC_OPTIONS='-v' '-o' 'test.exe' '-mtune=generic' '-march=x86-64'
m:/development/mingw64/bin/../libexec/gcc/x86_64-w64-mingw32/4.7.0/collect2.exe
--sysroot=m:\development\mingw64\bin\../../mingw64 -m i386pep -Bdynamic -o
test.exe
m:/development/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.7.0/../../../../x86_64-w64-mingw32/lib/../lib/crt2.o
m:/development/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.7.0/../../../../x86_64-w64-mingw32/lib/../lib/crtbegin.o
-Lm:/development/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.7.0
-Lm:/development/mingw64/bin/../lib/gcc *
-Lm:/development/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.7.0/../../../../x86_64-w64-mingw32/lib/../lib
*-Lm:/development/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.7.0/../../../../lib
-Lm:/development/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.7.0/../../../../x86_64-w64-mingw32/lib
-Lm:/development/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.7.0/../../..
R:\ccW8aWgR.o *-lopengl32* -lmingw32 -lgcc_eh -lgcc -lmoldname -lmingwex
-lmsvcrt -ladvapi32 -lshell32 -luser32 -lkernel32 -lmingw32 -lgcc_eh
-lgcc -lmoldname -lmingwex -lmsvcrt
m:/development/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.7.0/../../../../x86_64-w64-mingw32/lib/../lib/crtend.o
Note the "M:\Development\..." part is specific to the location where you
unzipped the package, and all paths were constructed relative to this path.
Do you have a small test file and the exact command you used that caused
the error, along with the complete error message?
Thanks,
Ruben
>
> --
> Programming today is a race between software engineers striving to build
> bigger and better idiot-proof programs, and the Universe trying to produce
> bigger and better idiots. So far, the Universe is winning. - Rich Cook
>
>
>
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