Estimated build time: 22 minutes Estimated required disk space: 168 MB |
This package is known to behave badly when you have changed its default optimization flags (including the -march and -mcpu options). GCC is best left alone, so we recommend you unsetting CFLAGS, CXXFLAGS and other such variables/settings that would change the default optimization that it comes with.
Install GCC by running the following commands:
patch -Np1 -i ../gcc-2.95.3-2.patch && mkdir ../gcc-build && cd ../gcc-build && ../gcc-2.95.3/configure --prefix=/usr --enable-languages=c,c++ \ --disable-nls --disable-shared --enable-threads=posix && make BOOT_LDFLAGS=-static bootstrap && make prefix=$LFS/usr install && cd $LFS/lib && ln -sf ../usr/bin/cpp && cd $LFS/usr/lib && ln -sf ../bin/cpp && cd $LFS/usr/bin && ln -sf gcc cc |
patch -Np1 -i ../gcc-2.95.3-2.patch: This new patch deals with incorrect handling of weak symbols, the over-optimization of calls to those weak symbols, an atexit issue and the __dso_handle symbol required for atexit's proper function.
make BOOT_LDFLAGS=-static: This is the equivalent to make LDFLAGS=-static as we use with other packages to compile them statically.
--prefix=/usr: This is NOT a typo. GCC hard codes some paths while compiling and so we need to pass /usr as the prefix during ./configure. We pass the real install prefix during the make install command later.
--enable-languages=c,c++: This only builds the C and C++ compilers and not the other available compilers as they are, on the average, not often used. If those other compilers are needed, the --enable-languages parameter can be omitted.
--enable-threads=posix: This enables C++ exception handling for multithreaded code.
ln -sf ../usr/bin/cpp: This creates the $LFS/lib/cpp symlink. Some packages explicitly try to find cpp in /lib.
ln -sf ../bin/cpp: This creates the $LFS/usr/lib/cpp symlink as there are packages that expect cpp to be in /usr/lib.
c++, c++filt, cc (link to gcc), cc1, cc1plus, collect2, cpp, cpp0, g++, gcc, gcov, protoize and unprotoize
These are the C compiler. A compiler translates source code in text format to a format that a computer understands. After a source code file is compiled into an object file, a linker will create an executable file from one or more of these compiler generated object files.
These are the C++ compiler; the equivalent of cc and gcc etc.
c++filt is used to demangle C++ symbols.
No description is currently available.
cpp pre-processes a source file, such as including the contents of header files into the source file. It's a good idea to not do this manually to save a lot of time. Someone just inserts a line like #include <filename>. The preprocessor inserts the contents of that file into the source file. That's one of the things a preprocessor does.
No description is currently available.
No description is currently available.
No description is currently available.
libgcc.a, libiberty.a, libstdc++.[a,so]
libgcc.a is a run-time support file for gcc.Most of the time, on most machines, libgcc.a is not actually necessary.
libiberty is a collection of subroutines used by various GNU programs including getopt, obstack, strerror, strtol and strtoul.
libstdc++ is the C++ library. It is used by C++ programs and contains functions that are frequently used in C++ programs. This way the programmer doesn't have to write certain functions (such as writing a string of text to the screen) from scratch every time he creates a program.
GCC-2.95.3 needs the following to be installed:
bash: sh
binutils: ar, as, ld, nm, ranlib
diffutils: cmp
fileutils: chmod, cp, ln, ls, mkdir, mv, rm, touch
find: find
gcc: cc, cc1, collect2, cpp0, gcc
grep: egrep, grep
make: make
patch: patch
sed: sed
sh-utils: basename, dirname, echo, expr, hostname, sleep, true, uname
tar: tar
texinfo: install-info, makeinfo
textutils: cat, tail, tr