gcc去哪儿了？

river4321

fedora8上本来一个版本的gcc4.1.2吧好像？我因为要编译别的软件需要安装一个老版的gcc 2.9，当编译完别的软件后我还想继续用4.1的版本，它去哪儿了呢？用yum系统提示已安装gcc，下个自己安装还装不上，怎么回事？原先的4.1的版本是不是还在？我把那个老版本的装在/usr/下了。

danny_zhan

我也想装gcc2.95，可是不知道怎么样装？装完之后系统不会出现问题吧？我的是redhat AS4，能否告知一下？在此谢过

pingz

可以试试

2. yum install compat-gcc-*

复制代码

好像只有 gcc 3.4 的，2.96 的好像只有源码包，装了之后用 gcc34 或 gcc296 就可以了。

danny_zhan

如果要make，怎么样设定才能让make调用gcc2.96呢？

ashizl

可以在configure的时候指定cc编译器。

river4321

我的问题怎么没人管啊？呵呵
你装了另外一个GCC可以参考下面
Using New GCC
If you installed as above, running gcc34 or any other app you installed should be directly accessible. You can verify with the following steps:

[mirandam@charon ~]$ which gcc34
/opt/gcc34/bin/gcc34
[mirandam@charon ~]$ which g++34
/opt/gcc34/bin/g++34

[mirandam@charon ~]$ gcc34 -v
Reading specs from /opt/gcc34/lib/gcc/i686-pc-linux-gnu/3.4.4/specs
Configured with: /home/mirandam/gcc/gcc-3.4.4/configure --prefix=/opt/gcc34
--program-suffix=34 --enable-languages=c,c++ --enable-shared --enable-threads=posix
--disable-checking --with-system-zlib --enable-__cxa_atexit
--disable-libunwind-exceptions
Thread model: posix
gcc version 3.4.4

There are many ways to use an alternate compiler. The 3 methods I commonly use: 1. Environment Variable, 2. Configure Support, and 3. Makefile Support.

Environment Variables
Most softwares support the CC and CXX environment variables. First assign them, then run configure and/or make. Example:

# export CC=gcc34
# export CXX=g++34
# ./configure
Configure Support
If the software is using the standard GNU automake and configure, then there is a chance it supports other compilers by passing in a setting to the configure script. First run configure --help to see if it mentions anything. The following example is from MPlayer:

# ./configure --help
# ./configure --cc=gcc34
Makefile Support
Sometimes the software may just come with a Makefile. Open the Makefile and look inside to see if there are variables that specify the compiler. You can either edit those variables or set them at compile time. For example:

(in Makefile)
       
C_COMPILER = cc
CPLUSPLUS_COMPILER = c++
Then using the Makefile, you can run:

# make CPLUSPLUS_COMPILER=g++34

pingz

[QUOTE=river4321;1838132]我的问题怎么没人管啊？呵呵
/QUOTE]
compat-gcc
还不行吗？

river4321

Post by pingz;1838140
[QUOTE=river4321;1838132]我的问题怎么没人管啊？呵呵
/QUOTE]
compat-gcc
还不行吗？

可以了，呵呵，多谢