Differences

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--- nix:gcc [2016/05/09 14:26] – [Building GCC in your home directory] kauffman
+++ nix:gcc [2017/12/05 12:03] – kauffman
@@ Line 1: / Line 1: @@
 ====== GCC ======
+===== GCC Versions that are already installed on CS infrastructure =====
+Usually, we install multiple versions. The default version of GCC probably won't be changed system wide... ever.
+Here is a list of packages we install as of 2017-05-02:
+<code>
+gcc
+gcc-4.7-uofc-cs
+gcc-4.9-uofc-cs
+gcc-5
+gcc-5-base:amd64
+gcc-5-multilib
+gcc-5.4-uofc-cs
+gcc-6-base:amd64
+gcc-6-base:i386
+gcc-6.3-uofc-cs
+gcc-7.1-uofc-cs
+</code>
+We are now taking more advantage of environment modules. This means depending on when you read this you could load the version of GCC you want to use.
+<code>
+kauffman3@green:~$ module --terse avail
+/etc/environment-modules/modules:
+cmake/3.1.1
+cmake/3.8.0
+gcc/4.7.4
+gcc/4.9.3
+gcc/5.4.0
+gcc/6.3.0
+gcc/7.1.0
+kauffman3@green:~$ module load gcc/4.7.4
+kauffman3@green:~$ echo "$PATH | $INCLUDE | $LD_LIBRARY_PATH | $MANPATH"
+/usr/local/gcc/4.7.4/bin:/home/kauffman3/bin:/usr/local/bin:/usr/bin:/bin:/usr/local/games:/usr/games:/opt/puppetlabs/bin
+| /usr/local/gcc/4.7.4/include | /usr/local/gcc/4.7.4/lib |
+/usr/local/gcc/4.7.4/man:/usr/share/man
+kauffman3@green:~$ gcc --version
+gcc (GCC) 4.7.4
+kauffman3@green:~$ module unload gcc/4.7.4
+kauffman3@green:~$ gcc --version
+gcc (Ubuntu 4.9.4-2ubuntu1~14.04.1) 4.9.4
+</code>
 ===== Building GCC in your home directory =====
 https://gcc.gnu.org/wiki/InstallingGCC
@@ Line 15: / Line 65: @@
 #!/bin/bash
-PREFIX='.local/gcc/4.9.3'
+PREFIX="$HOME/.local/gcc/4.9.3"
 # Building gcc in $HOME
@@ Line 30: / Line 80: @@
 cd objdir
 $PWD/../gcc-4.9.3/configure \
-  --prefix=$HOME/$PREFIX \
+  --prefix=$PREFIX \
   --enable-languages=c,c++,fortran,go \
   --enable-shared \
@@ Line 49: / Line 99: @@
 echo "  export PATH=\$HOME/$PREFIX/bin:\$PATH"
 echo "  export LD_LIBRARY_PATH=\$HOME/$PREFIX/lib:\$LD_LIBRARY_PATH"
+</code>
+===== Troubleshooting =====
+==== 'module' command not found ====
+To resolve you may have to do the following:
+<code>
+source /etc/profile.d/modules.sh
 </code>