User:Dmalcolm/gcc-15

GCC 15 mass prebuild

These are notes to myself on my attempts to use mass-prebuilder to test GCC 15 in Fedora in December 2024

Current status

• Timeout building GCC in copr, so using one of Jakub's scratch builds, turned into repos here.
  • Currently having quota issues uploading the repos, so only testing aarch64 for now
• Disabling annobin in redhat-rpm-config in the copr for now due to https://sourceware.org/bugzilla/show_bug.cgi?id=32429

libtool can't be installed

Problem: cannot install both gcc-15.0.0-0.2.fc42.aarch64 from https_dmalcolm_fedorapeople_org_gcc_gcc_15_mass_prebuild_arch and gcc-14.2.1-6.fc42.aarch64 from fedora
  - package libtool-2.5.4-1.fc42.aarch64 from fedora requires gcc(major) = 14, but none of the providers can be installed
  - cannot install the best candidate for the job
  - conflicting requests
You can try to add to command line:
  --no-best to not limit the transaction to the best candidates

Copr build error: Build failed

Function prototypes with empty params change from implicit "int" to "void"

GCC 15 defaults to C23, in which I believe that

extern int foo();

in a decl now means

extern int foo(void);

rather than:

extern int foo(int)

"void" rather than implicit "int"; TODO: get chapter-and-verse for this; commit in question was https://gcc.gnu.org/git/?p=gcc.git;a=commitdiff;h=0a4b219d39c74aec7ebf87ac3be38d8f93efd634

Examples:

• rhbz#2331208 epson-inkjet-printer-escpr fails to build with GCC 15 (implicit int param in function prototype)