GV

GeezerVison

The World Wide Web, restored to 800 pixels of glory.

Home|About|Gaming cabinet|Archives|How it works|Starter sites

On this site

  • Sign in
  • ActionsCI/CD and automation
  • CodespacesCloud development environments
  • All Features
  • Documentation
  • Training
  • Certifications
  • Build with Copilot
  • Customize Copilot
  • Integrations
  • Trending repos
  • GitHub Sponsors
  • Developer articles
  • Enterprises

This view

  • Original page
  • New address

GeezerVison is showing github.com — BOLT-WARNING: specifying numeric value "1" for option -icf is deprecated · Issue #149708 · python/cpython

BOLT-WARNING: specifying numeric value "1" for option -icf is deprecated #149708

New issue
Copy link
New issue
Copy link
Open
Open
BOLT-WARNING: specifying numeric value "1" for option -icf is deprecated#149708
Copy link
Labels
buildThe build process and cross-buildThe build process and cross-buildtype-bugAn unexpected behavior, bug, or errorAn unexpected behavior, bug, or error

Description

@utkonos
utkonos
opened on May 12, 2026
Issue body actions

Bug report

Bug description:

Building 3.14.5 with gcc 15.2 and --enable-bolt produces this warning:

    default: BOLT-WARNING: specifying numeric value "1" for option -icf is deprecated

This line in configure.ac hard codes -icf=1 in BOLT_APPLY_FLAGS:

cpython/configure.ac

Line 2258 in 54a5fd4

-icf=1

This issue mentions ICF behavior: #134642

Build environment: Ubuntu 26.04 LTS, gcc 15.2.0, configure with:

./configure --enable-optimizations --with-lto --enable-bolt --enable-safety --enable-slower-safety --with-system-expat CXX=/usr/bin/g++ CFLAGS="-flto=auto" LDFLAGS="-flto=auto"

CPython versions tested on:

3.14

Operating systems tested on:

Linux

Activity

  1. utkonos
    added
    type-bugAn unexpected behavior, bug, or errorAn unexpected behavior, bug, or error
    on May 12, 2026
  2. picnixz
    added
    buildThe build process and cross-buildThe build process and cross-build
    on May 12, 2026

  3. ankhikarmakar commented on May 19, 2026

    @ankhikarmakar
    ankhikarmakar
    on May 19, 2026
    Contributor
    More actions

    This overlaps with #148833

    Reacted by utkonos
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment

Metadata

Metadata

Assignees

No one assigned

    Labels

    buildThe build process and cross-buildThe build process and cross-buildtype-bugAn unexpected behavior, bug, or errorAn unexpected behavior, bug, or error

    Projects

    No projects

      Milestone

      No milestone

      Relationships

      None yet

      Development

      No branches or pull requests

      Issue actions
      You are visitor 01402503 — GeezerVison does not store the pages you look up.
      Best viewed with Netscape Navigator 4.7 or Internet Explorer 6 at 800×600. No cookies required.