misc,scons,util: Drop support for GCC 4
Corresponding website update:
https://gem5-review.googlesource.com/c/public/gem5-website/+/33657
Issue-on: https://gem5.atlassian.net/browse/GEM5-218
Change-Id: Ia72edda6229214e2f9d548266a42a0affd49b340
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/33659
Reviewed-by: Jason Lowe-Power <power.jg@gmail.com>
Reviewed-by: Gabe Black <gabeblack@google.com>
Maintainer: Jason Lowe-Power <power.jg@gmail.com>
Tested-by: kokoro <noreply+kokoro@google.com>
diff --git a/SConstruct b/SConstruct
index 4ac134b..ca3f1a1 100755
--- a/SConstruct
+++ b/SConstruct
@@ -357,24 +357,21 @@
"src/SConscript to support that compiler.")))
if main['GCC']:
- # Check for a supported version of gcc. >= 4.8 is chosen for its
- # level of c++11 support. See
- # http://gcc.gnu.org/projects/cxx0x.html for details.
gcc_version = readCommand([main['CXX'], '-dumpversion'], exception=False)
- if compareVersions(gcc_version, "4.8") < 0:
- error('gcc version 4.8 or newer required.\n'
+ if compareVersions(gcc_version, "5") < 0:
+ error('gcc version 5 or newer required.\n'
'Installed version:', gcc_version)
Exit(1)
main['GCC_VERSION'] = gcc_version
- if compareVersions(gcc_version, '4.9') >= 0:
- # Incremental linking with LTO is currently broken in gcc versions
- # 4.9 and above. A version where everything works completely hasn't
- # yet been identified.
- #
- # https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67548
- main['BROKEN_INCREMENTAL_LTO'] = True
+ # Incremental linking with LTO is currently broken in gcc versions
+ # 4.9 and above. A version where everything works completely hasn't
+ # yet been identified.
+ #
+ # https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67548
+ main['BROKEN_INCREMENTAL_LTO'] = True
+
if compareVersions(gcc_version, '6.0') >= 0:
# gcc versions 6.0 and greater accept an -flinker-output flag which
# selects what type of output the linker should generate. This is
@@ -416,9 +413,6 @@
'-fno-builtin-realloc', '-fno-builtin-free'])
elif main['CLANG']:
- # Check for a supported version of clang, >= 3.1 is needed to
- # support similar features as gcc 4.8. See
- # http://clang.llvm.org/cxx_status.html for details
clang_version_re = re.compile(".* version (\d+\.\d+)")
clang_version_match = clang_version_re.search(CXX_version)
if (clang_version_match):
@@ -462,13 +456,9 @@
# Add sanitizers flags
sanitizers=[]
if GetOption('with_ubsan'):
- # Only gcc >= 4.9 supports UBSan, so check both the version
- # and the command-line option before adding the compiler and
- # linker flags.
- if not main['GCC'] or compareVersions(main['GCC_VERSION'], '4.9') >= 0:
- sanitizers.append('undefined')
+ sanitizers.append('undefined')
if GetOption('with_asan'):
- # Available for gcc >= 4.8 or llvm >= 3.1 both a requirement
+ # Available for gcc >= 5 or llvm >= 3.1 both a requirement
# by the build system
sanitizers.append('address')
suppressions_file = Dir('util').File('lsan-suppressions').get_abspath()
diff --git a/util/cloudbuild/cloudbuild_create_images.yaml b/util/cloudbuild/cloudbuild_create_images.yaml
index 2faadfa..bed950a 100644
--- a/util/cloudbuild/cloudbuild_create_images.yaml
+++ b/util/cloudbuild/cloudbuild_create_images.yaml
@@ -20,13 +20,6 @@
- name: 'gcr.io/cloud-builders/docker'
args: ['build',
'-t',
- 'gcr.io/$PROJECT_ID/gcc-version-4.8:latest',
- '--build-arg', 'version=4.8',
- 'util/dockerfiles/ubuntu-18.04_gcc-version']
-
- - name: 'gcr.io/cloud-builders/docker'
- args: ['build',
- '-t',
'gcr.io/$PROJECT_ID/gcc-version-5:latest',
'--build-arg', 'version=5',
'util/dockerfiles/ubuntu-18.04_gcc-version']
@@ -124,7 +117,6 @@
images: ['gcr.io/$PROJECT_ID/ubuntu-20.04_all-dependencies:latest',
'gcr.io/$PROJECT_ID/ubuntu-18.04_all-dependencies:latest',
'gcr.io/$PROJECT_ID/ubuntu-18.04_min-dependencies:latest',
- 'gcr.io/$PROJECT_ID/gcc-version-4.8:latest',
'gcr.io/$PROJECT_ID/gcc-version-5:latest',
'gcr.io/$PROJECT_ID/gcc-version-6:latest',
'gcr.io/$PROJECT_ID/gcc-version-7:latest',
