This repository contains personal scripts to rebuild older versions of GCC
on recent platforms where these older versions are no longer available.
Each version of GCC is installed in /opt/gcc-X.Y.Z.
The typical "target" is CentOS 8 which is the most recent version of CentOS, with CentOS being the distro with the oldest software components. Thus, this is the best up-to-date target for rebuilding old versions of GCC. Other distros with more recent software components may bring more incompatibility issues.
All scripts accept two parameters: a mandatory GCC version (e.g. "4.8.5" or "6.3.0") and an optional target (the default is "centos8"). The target is just a name which is used to differentiate patches for a given version of GCC on distinct distros. If we only use CentOS, the default is good enough.
Typical scenario:
-
Run
get-gcc.shto download and expand the source code of a given version of GCC. If a patch already exists for this GCC version on this target, it is applied. -
Run
build-gcc.shto build and install the specified version of GCC. -
If no patch already exists for this GCC version on this target, compilation issues may appear. Fix them and relaunch
make -j10 -C BUILDuntil the build is successful. -
If compilation issues were fixed, create the patch for this GCC version on this target. First, expand the GCC tarball again to get a reference tree and run
build-patch.sh. The patch is created from the differences between the reference tree and the modified one. Commit the changes to integrate the new patch. -
To test the new GCC on the TSDuck project, run
build-tsduck.sh.
| GCC version | Target | Remarks |
|---|---|---|
| 4.8.5 | centos8 | Patch needed |
| 6.3.0 | centos8 | Patch needed |
| 7.5.0 | centos8 | |
| 8.3.1 | centos8 | Default compiler on CentOS 8.3 |
On x86_64 systems, the 32-bit versions of the system libraries must be installed first.
On Red Hat systems (Fedora, CentOS), install the following packages: glibc-devel.i686 libstdc++-devel.i686