Merge remote-tracking branch 'origin' into psakiev/dev-build

lib/spack/docs/getting_started.rst

@@ -35,7 +35,7 @@ A build matrix showing which packages are working on which systems is shown belo
       .. code-block:: console
 
          apt update
-         apt install build-essential ca-certificates coreutils curl environment-modules gfortran git gpg lsb-release python3 python3-distutils python3-venv unzip zip
+         apt install bzip2 ca-certificates file g++ gcc gfortran git gzip lsb-release patch python3 tar unzip xz-utils zstd
 
    .. tab-item:: RHEL
 
@@ -43,14 +43,14 @@ A build matrix showing which packages are working on which systems is shown belo
 
          dnf install epel-release
          dnf group install "Development Tools"
-         dnf install curl findutils gcc-gfortran gnupg2 hostname iproute redhat-lsb-core python3 python3-pip python3-setuptools unzip python3-boto3
+         dnf install gcc-gfortran redhat-lsb-core python3 unzip
 
    .. tab-item:: macOS Brew
 
       .. code-block:: console
 
          brew update
-         brew install curl gcc git gnupg zip
+         brew install gcc git zip
 
 ------------
 Installation

lib/spack/spack/compiler.py

@@ -428,6 +428,11 @@ def default_dynamic_linker(self) -> Optional[str]:
     @property
     def default_libc(self) -> Optional["spack.spec.Spec"]:
         """Determine libc targeted by the compiler from link line"""
+        # technically this should be testing the target platform of the compiler, but we don't have
+        # that, so stick to host platform for now.
+        if sys.platform in ("darwin", "win32"):
+            return None
+
         dynamic_linker = self.default_dynamic_linker
 
         if not dynamic_linker:
@@ -449,14 +454,20 @@ def compiler_verbose_output(self) -> Optional[str]:
         return self.cache.get(self).c_compiler_output
 
     def _compile_dummy_c_source(self) -> Optional[str]:
-        cc = self.cc if self.cc else self.cxx
+        if self.cc:
+            cc = self.cc
+            ext = "c"
+        else:
+            cc = self.cxx
+            ext = "cc"
+
         if not cc or not self.verbose_flag:
             return None
 
         try:
             tmpdir = tempfile.mkdtemp(prefix="spack-implicit-link-info")
             fout = os.path.join(tmpdir, "output")
-            fin = os.path.join(tmpdir, "main.c")
+            fin = os.path.join(tmpdir, f"main.{ext}")
 
             with open(fin, "w") as csource:
                 csource.write(