On 5 April 2011 10:05, Arnab Das wrote: > Hello, > > This is my first use of cygwin and gcc. I currently > require the gcc compiler so I’m using Cygwin for it. I am facing > problem installing gcc 4.6.0 wth cygwin. > > Steps I tried: > > 1) Installed Cygwin from setup.exe. (success) > > 2) Installed latest ver. of all prerequisites(viz. bash, > binutils, bzip2, gcc-core, gzip, m4 and make) through cygwin setup. > (success) > > 3) Installed gmp, mpfr, mpc in sequence(by building from source > code). (success) > > 4) Configured gcc-4.6.0 with --enable-languages=c (from the > build directory as instructed in the gcc site) (success) Did you run configure as "./configure" ? That is NOT supported, as clearly documented in the GCC installation instructions. > 5) Build gcc-4.6.0 (error) > > > > Last few lines during building including error: > > cc1-checksum.o main.o libbackend.a ../libcpp/libcpp.a > ../libdecnumber/libdecnumber.a ../libcpp/libc > pp.a -lintl ../libiberty/libiberty.a ../libdecnumber/libdecnumber.a > -lmpc -lmpfr -lgmp -L../zlib -lz > /usr/lib/gcc/i686-pc-cygwin/3.4.4/../../../../i686-pc-cygwin/bin/ld: > cannot find -lmpc > /usr/lib/gcc/i686-pc-cygwin/3.4.4/../../../../i686-pc-cygwin/bin/ld: > cannot find -lmpfr > /usr/lib/gcc/i686-pc-cygwin/3.4.4/../../../../i686-pc-cygwin/bin/ld: > cannot find -lgmp Obviously this means it can't find the gmp, mpfr and mpc libraries. The simplest way to solve this is not to install gmp/mpfr/mpc separately but to let gcc build them itself. Delete the entire gcc source directory. Unpack the gcc sources again, this will create a gcc-4.6.0 directory. Put the gmp-x.y.z directory under the gcc-4.6.0 directory and rename it to gmp. Do the same for mpfr-x.y.z and mpc-x.y.z Create a new directory called "build" at the same level as gcc-4.6.0 (NOT as a sub-directory of gcc-4.6.0) then: cd build ../gcc-4.6.0/configure --enable-languages=c make
