Merge pull request #202827 from vcunat/p/glibc-kernel-versions

glibc: bump the minimum kernel version

pkgs/development/libraries/glibc/common.nix

@@ -89,36 +89,6 @@ stdenv.mkDerivation ({
          patch extends the search path by "/run/current-system/sw/bin". */
       ./fix_path_attribute_in_getconf.patch
 
-      /* Allow running with RHEL 6 -like kernels.  The patch adds an exception
-        for glibc to accept 2.6.32 and to tag the ELFs as 2.6.32-compatible
-        (otherwise the loader would refuse libc).
-        Note that glibc will fully work only on their heavily patched kernels
-        and we lose early mismatch detection on 2.6.32.
-
-        On major glibc updates we should check that the patched kernel supports
-        all the required features.  ATM it's verified up to glibc-2.26-131.
-        # HOWTO: check glibc sources for changes in kernel requirements
-        git log -p glibc-2.25.. sysdeps/unix/sysv/linux/x86_64/kernel-features.h sysdeps/unix/sysv/linux/kernel-features.h
-        # get kernel sources (update the URL)
-        mkdir tmp && cd tmp
-        curl http://vault.centos.org/6.9/os/Source/SPackages/kernel-2.6.32-696.el6.src.rpm | rpm2cpio - | cpio -idmv
-        tar xf linux-*.bz2
-        # check syscall presence, for example
-        less linux-*?/arch/x86/kernel/syscall_table_32.S
-       */
-      ./allow-kernel-2.6.32.patch
-
-      /* Provide a fallback for missing prlimit64 syscall on RHEL 6 -like
-         kernels.
-
-         This patch is maintained by @veprbl. If it gives you trouble, feel
-         free to ping me, I'd be happy to help.
-       */
-      (fetchurl {
-        url = "https://git.savannah.gnu.org/cgit/guix.git/plain/gnu/packages/patches/glibc-reinstate-prlimit64-fallback.patch?id=eab07e78b691ae7866267fc04d31c7c3ad6b0eeb";
-        sha256 = "091bk3kyrx1gc380gryrxjzgcmh1ajcj8s2rjhp2d2yzd5mpd5ps";
-      })
-
       ./fix-x64-abi.patch
 
       /* https://github.com/NixOS/nixpkgs/pull/137601 */
@@ -175,7 +145,7 @@ stdenv.mkDerivation ({
       # Enable Intel Control-flow Enforcement Technology (CET) support
       "--enable-cet"
     ] ++ lib.optionals withLinuxHeaders [
-      "--enable-kernel=3.2.0" # can't get below with glibc >= 2.26
+      "--enable-kernel=3.10.0" # RHEL 7 and derivatives, seems oldest still supported kernel
     ] ++ lib.optionals (stdenv.hostPlatform != stdenv.buildPlatform) [
       (lib.flip lib.withFeature "fp"
          (stdenv.hostPlatform.gcc.float or (stdenv.hostPlatform.parsed.abi.float or "hard") == "soft"))