-----Original Message----- From: Marco Trudel <mtrudel@xxxxxx> To: gcc-help@xxxxxxxxxxx Date: Thu, 18 Jan 2007 13:00:15 +0100 Subject: gcc4.3 configuring problems with mpfr Hello all I'm trying to build a 4.3 (rev 120828) host=minGW target=minGW build=Linux gcc. I already successfully built a host=Linux target=Linux and host=Linux target=minGW gcc with the mentioned source version. I use these two to compile the minGW-minGW one. I used to do that with the gcc 4.2, but the new required mpfr library makes me some trouble with gcc 4.3. I configure gcc with: /usr/local/src/gcc/configure --prefix=/home/Marco/Desktop/compile-win-win/gcc-XYZXYZ-win --with-sysroot=/home/Marco/Desktop/compile-win-win/gcc-XYZXYZ-win/sys-root --build=i686-pc-linux-gnu --host=i686-pc-mingw32 --target=i686-pc-mingw32 --enable-languages=c,c++,java --enable-libgcj --with-gnu-as --with-gnu-ld --disable-nls --disable-debug --disable-shared --disable-checking --enable-threads=win32 --disable-win32-registry --with-gmp=/home/Marco/Desktop/compile-win-win/gmp-out --with-mpfr=/home/Marco/Desktop/compile-win-win/mpfr-out --with-gcj=i686-pc-mingw32-gcj --enable-sjlj-exceptions --with-build-sysroot=/home/Marco/Desktop/compile-win-win/gcc-XYZXYZ-win/sys-root But it failes with: checking for correct version of gmp.h... yes checking for correct version of mpfr.h... no configure: error: Building GCC requires GMP 4.1+ and MPFR 2.2.1+. Config.log says: configure:2401: checking for correct version of mpfr.h configure:2421: i686-pc-mingw32-gcc -o conftest -g -O2 -I/home/Marco/Desktop/compile-win-win/gmp-out/include -I/home/Marco/Desktop/compile-win-win/mpfr-out/include conftest.c -L/home/Marco/Desktop/compile-win-win/gmp-out/lib -L/home/Marco/Desktop/compile-win-win/mpfr-out/lib -lmpfr -lgmp 1>&5 /tmp/ccwl5QK3.o: In function `main':/home/Marco/Desktop/compile-win-win/gcc-build/configure:2411: undefined reference to `_mpfr_init' :/home/Marco/Desktop/compile-win-win/gcc-build/configure:2412: undefined reference to `_mpfr_init' :/home/Marco/Desktop/compile-win-win/gcc-build/configure:2414: undefined reference to `_mpfr_atan2' :/home/Marco/Desktop/compile-win-win/gcc-build/configure:2415: undefined reference to `_mpfr_erfc' :/home/Marco/Desktop/compile-win-win/gcc-build/configure:2416: undefined reference to `_mpfr_subnormalize' collect2: ld returned 1 exit status I do not crosscompile gmp and mpfr. Is that necessary? Anyway, the problem seems to occur before it might be an error if gmp/mpfr isn't crosscompiled: It looks to me (note, I'm not an expert) as this is a linker error because not all needed objects are pulled into the binary. I noticed this problem already when using a 4.2 gcc on Windows while working with gmp on a private project. So because I assume that this is a GCC problem, I wondered how the Host=Linux target=minGW compiler was able to compile the mpfr test and checked that config.log. It used the gcc that is installed on my computer (version 4.02). I tried then to compile that test with the built gcc from my host=Linux target=Linux compiler and it fails with the same error as above. So, can this be a gcc bug? Or is this something the linker is doing wrong? I'm using binutils v2.16.91. I noticed the same problem with v 2.16.1. The current gmp and mpfr updates are sufficient for building on cygwin, so I wouldn't accuse gcc of a bug there. Tim Prince
