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-rw-r--r--var/spack/repos/builtin/packages/m4/package.py7
1 files changed, 7 insertions, 0 deletions
diff --git a/var/spack/repos/builtin/packages/m4/package.py b/var/spack/repos/builtin/packages/m4/package.py
index f5bb11cee3..dede047da1 100644
--- a/var/spack/repos/builtin/packages/m4/package.py
+++ b/var/spack/repos/builtin/packages/m4/package.py
@@ -78,6 +78,13 @@ class M4(AutotoolsPackage, GNUMirrorPackage):
# https://www.gnu.org/software/autoconf/manual/autoconf-2.67/html_node/autom4te-Invocation.html
env.set("M4", self.prefix.bin.m4)
+ def setup_build_environment(self, env):
+ # The default optimization level for icx/icpx is "-O2",
+ # but building m4 with this level breaks the build of dependents.
+ # So we set it explicitely to "-O0".
+ if self.spec.satisfies("%intel") or self.spec.satisfies("%oneapi"):
+ env.append_flags("CFLAGS", "-O0")
+
def setup_run_environment(self, env):
env.set("M4", self.prefix.bin.m4)