LEAP ILP 32

This page describes the process of creating ILP32 support for LEAP.

GCC:

• I downloaded gcc-4.9.2. I got mine from http://arm.koji.fedoraproject.org/koji/buildinfo?buildID=255322.
• I created a scratch build for that rpm, which is accessible here: http://blue/koji/taskinfo?taskID=83468.
• I downloaded the source rpm from that build and manually downloaded and installed required dependencies from the same place.
• I run "rpm -i gcc-4.9.2-6.bb4.src.rpm" to install it on AArch64 builder.
• Due to internal RPM macros, I had to change one of them in "~/rpmbuild/SPECS/gcc.spec". Information on the default macros can be found here: https://fedoraproject.org/wiki/Packaging:RPMMacros. To fix the installation path, I added this line as the very first line of the spec file:

%define _prefix /opt/ilp32/usr

• I run "export RPM_PACKAGER="Artem Luzyanin <artem.luzyanin@senecacollege.ca>""
• I run "rpmdev-bumpspec -c "Changed spec file to create ilp32-capable gcc in a separate tree."" command to add the changes with comments to the spec file.
• I run "rpmbuild -ba --nocheck gcc.spec" command to get the rpms.
• I run "rpm -qlp gcc-4.9.2-6.bb1.1.aarch64.rpm gcc.spec" command to check that all gcc files will be installed in the correct place (under /opt/ilp32/).

GLIBC:

• I downloaded glibc-2.17 source rpm. I got mine from http://blue/kojifiles/packages/glibc/2.17/78.bb4/src/glibc-2.17-78.bb4.src.rpm.
• I downloaded and installed required dependencies from the same place.
• I run "rpm -i glibc-2.17-78.bb4.src.rpm" to install it on AArch64 builder.
• I went in the "~/rpmbuild/SPEC" directory, and run command "rpmbuild -bp glibc.spec" to get the prep stage on the rpm.
• I created a git repository, and pushed the content of "~/rpmbuild/BUILD/glibc{some random numbers}" directory to it to get the original information in it.
• I went in the "~/rpmbuild/BUILD/glibc{some random numbers}" directory.

I changed "configure" file in the next ways: I run "./configure" command. I changed "Makefile" file in the next ways:

• I run "make" command, then waited for the make for a long period of time for it to be complete (around 7 hours).
• I committed the changes and run "git diff --patience master glibc21-leap-ilp-32 | filterdiff --format=context > ../glibc21-leap-ilp-32.patch" command to get the patch for my changes.
• I run "export RPM_PACKAGER="Artem Luzyanin <artem.luzyanin@senecacollege.ca>""
• I run "rpmdev-bumpspec -c "This patch is to create ilp32-compiler libraries of glibc in a separate tree."" command to add the changes with comments to the spec file.

I changed "~/rpmbuild/SPEC/glibc.spec" file in the next way: I run "rpmbuild -bs glibc.spec" command to get the source rpm.

Testing ILP32:

• Create "hello.c" file.
• Add info to it at your discretion.
• Run "/opt/ilp32/usr/bin/gcc -c -mabi=ilp32 hello.c".
• Run "ld -m aarch64elf32 hello.o".
• If you want to run it in one commands, use "/opt/ilp32/usr/bin/gcc -mabi=ilp32 -Xlinker -maarch64elf32 hello.c".
• Run "file a.out".
• Check that it says "ELF32", "executable binary" and "statically linked".