Setting path for GCC? Post: 40460

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Top Forums UNIX for Dummies Questions & Answers Setting path for GCC? Post 40460 by HOUSCOUS on Tuesday 16th of September 2003 01:22:27 AM

09-16-2003

Registered User

Setting path for GCC?

Dear all, I have downloaded the latest version of gcc --- gcc-3.3.1.tar.gz from gnu.org. My Linux distribution is Mandrake 9.0. This was how I installed it:

su -
passwrd:

mkdir /usr/local/src
cd /usr/local/src

gunzip /tmp/gcc-3.3.1.tar.gz #where I downloaded the file
tar xvf /tmp/gcc-3.3.1.tar

cd /opt/build
/usr/local/src/gcc-3.3.1/configure
--prefix=/usr --libdir=/usr/lib --with-slibdir=/lib --mandir=/usr/share/man --infodir=/usr/share/info --enable-shared --enable-threads=posix --disable-checking --enable-long-long --enable-__cxa_atexit --enable-languages=c,c++,ada,f77,objc,java --host=i586-mandrake-linux-gnu --with-system-zlib

make
make install

After I have done all these, I used "which, whereis, -v, and --version" to check the version of GCC.

Quote:

$ which gcc
/usr/bin/gcc

$ whereis gcc
gcc: /usr/bin/gcc3.2-version /usr/bin/gcc /usr/local/bin/gcc /usr/share/man/man1/gcc.1.bz2 /usr/share/man/man1/gcc.1

$ gcc -v
Reading specs from /usr//bin/../lib/gcc-lib/i586-mandrake-linux-gnu/3.3.1/specs
Configured with: /usr/local/src/gcc-3.3.1/configure --prefix=/usr --libdir=/usr/lib --with-slibdir=/lib --mandir=/usr/share/man --infodir=/usr/share/info --enable-shared --enable-threads=posix --disable-checking --enable-long-long --enable-__cxa_atexit --enable-languages=c,c++,ada,f77,objc,java --host=i586-mandrake-linux-gnu --with-system-zlib
Thread model: posix
gcc version 3.3.1

$ gcc --version
gcc (GCC) 3.3.1
Copyright (C) 2003 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

$

I can see the system holds two versions of gcc, and if I didn't guess it wrong, the system is still using the old gcc-3.2 as the default.

I have two questions here:
First, how could I set system to use gcc-3.3.1? Someone told me because gcc-3.2 was installed in /usr/bin and gcc-3.3.1 was in /usr/local/bin so I have to change the order in $PATH. I didn't understand that clear, so I went to ~/.bashrc and changed it. But after I rebooted the system, I saw the system was still using gcc-3.2. As a newbie, I hope someone could walk me through it step-by-step or even a little tip will be appreciated.
My second question is about removing the older version of gcc. I don't think I need two versions of gcc in my system since they require space. I want to remove the older version. My Mandrake 9.0 uses rpm to install gcc-3.2 in the system, so I tried to use "rpm -e gcc" to delete the old version. I failed because of the software dependency. Is there any way to remove it and not hurting my other programs have installed in my computer?

Thanx in advanced.

HOUSCOUS

HOUSCOUS

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LEARN ABOUT NETBSD

genassym.cf

GENASSYM.CF(5)						      BSD File Formats Manual						    GENASSYM.CF(5)

NAME

     genassym.cf -- assym.h definition file

DESCRIPTION

     The genassym.cf file is used by genassym(1) to make constant C expressions known to assembler source files.  Lines starting with '#' are dis-
     carded by genassym(1).  Lines starting with include, ifdef, if, else or endif are preceded with '#' and passed otherwise unmodified to the C
     compiler.	Lines starting with quote get passed on with the quote command removed.  The first word after a define command is taken as a CPP
     identifier and the rest of the line has to be a constant C expression. The output of genassym(1) will assign the numerical value of this
     expression to the CPP identifier.	export X is a shorthand for define X X.  struct X remembers X for the member command and does a define
     X_SIZEOF sizeof(X).  member X does a define X offsetof(<last struct>, X).	config <ctype> <gcc constraint> <asm print modifier> can be used
     to customize the output of genassym(1).  When producing C output, values are casted to <ctype> (default: long) before they get handed to
     printf. <gcc constraint> (default: n) is the constraint used in the __asm__ statements. <asm print modifier> (default: empty) can be used to
     force gcc to output operands in different ways then normal. The "a" modifier e.g. stops gcc from emitting immediate prefixes in front of con-
     stants for the i386 and m68k port.

FILES

     /usr/src/sys/arch/${MACHINE}/${MACHINE}/genassym.cf

SEE ALSO

     genassym(1)

HISTORY

     The genassym.cf file appeared in NetBSD 1.3.

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