Disable CPU optimizations not supported by all x86_64 systems.

--- a/cmake/modules/SIMDExt.cmake	2017-03-23 22:22:58.254071694 +0100
+++ b/cmake/modules/SIMDExt.cmake	2017-03-23 22:23:22.446848845 +0100
@@ -5,11 +5,6 @@
 # HAVE_ARM_NEON
 # HAVE_INTEL_SSE
 # HAVE_INTEL_SSE2
-# HAVE_INTEL_SSE3
-# HAVE_INTEL_SSSE3
-# HAVE_INTEL_PCLMUL
-# HAVE_INTEL_SSE4_1
-# HAVE_INTEL_SSE4_2
 #
 # SIMD_COMPILE_FLAGS
 #
@@ -85,26 +80,6 @@
       if(HAVE_INTEL_SSE2)
         set(SIMD_COMPILE_FLAGS "${SIMD_COMPILE_FLAGS} -msse2")
       endif()
-      CHECK_C_COMPILER_FLAG(-msse3 HAVE_INTEL_SSE3)
-      if(HAVE_INTEL_SSE3)
-        set(SIMD_COMPILE_FLAGS "${SIMD_COMPILE_FLAGS} -msse3")
-      endif()
-      CHECK_C_COMPILER_FLAG(-mssse3 HAVE_INTEL_SSSE3)
-      if(HAVE_INTEL_SSSE3)
-        set(SIMD_COMPILE_FLAGS "${SIMD_COMPILE_FLAGS} -mssse3")
-      endif()
-      CHECK_C_COMPILER_FLAG(-mpclmul HAVE_INTEL_PCLMUL)
-      if(HAVE_INTEL_PCLMUL)
-        set(SIMD_COMPILE_FLAGS "${SIMD_COMPILE_FLAGS} -mpclmul")
-      endif()
-      CHECK_C_COMPILER_FLAG(-msse4.1 HAVE_INTEL_SSE4_1)
-      if(HAVE_INTEL_SSE4_1)
-        set(SIMD_COMPILE_FLAGS "${SIMD_COMPILE_FLAGS} -msse4.1")
-      endif()
-      CHECK_C_COMPILER_FLAG(-msse4.2 HAVE_INTEL_SSE4_2)
-      if(HAVE_INTEL_SSE4_2)
-        set(SIMD_COMPILE_FLAGS "${SIMD_COMPILE_FLAGS} -msse4.2")
-      endif()
     endif(CMAKE_SYSTEM_PROCESSOR MATCHES "amd64|x86_64|AMD64")
   endif(CMAKE_SYSTEM_PROCESSOR MATCHES "i686|amd64|x86_64|AMD64")
 elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "(powerpc|ppc)64le")
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<div class='path'>path: <a href='/guix/log/?id=8cec10f6022fc87afce020c6d0810a2675db7a79'>root</a>/<a href='/guix/log/gnu?id=8cec10f6022fc87afce020c6d0810a2675db7a79'>gnu</a>/<a href='/guix/log/gnu/services?id=8cec10f6022fc87afce020c6d0810a2675db7a79'>services</a>/<a href='/guix/log/gnu/services/herd.scm?id=8cec10f6022fc87afce020c6d0810a2675db7a79'>herd.scm</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/gnu/services/herd.scm?id=8cec10f6022fc87afce020c6d0810a2675db7a79&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2020-03-03 15:00:32 +0100'>2020-03-03</span></td><td><a href='/guix/commit/gnu/services/herd.scm?id=8f5a0a97b1d04e8ade8c16694dcb72aed176c595'>services: herd: Add restart-service.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/services/herd.scm (restart-service): New exported procedure.
</span></span></td><td>Mathieu Othacehe</td></tr>
<tr><td><span title='2019-10-18 23:22:25 +0200'>2019-10-18</span></td><td><a href='/guix/commit/gnu/services/herd.scm?id=6aeae5b90b9513d316141c0131fd43c76a200f63'>herd: Define 'shepherd-message-port'.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/services/herd.scm (shepherd-message-port): New variable.
(display-message): Use it instead of 'current-error-port'.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2019-07-26 19:19:49 +0200'>2019-07-26</span></td><td><a href='/guix/commit/gnu/services/herd.scm?id=5c793753b31b1dcd9a554bce953124f7ae88ca9a'>guix system: Add 'reconfigure' module.</a><span class='msg-avail'>...<span class='msg-tooltip'>* guix/scripts/system/reconfigure.scm: New file.
* Makefile.am (MODULES): Add it.
* guix/scripts/system.scm (bootloader-installer-script): Export variable.
* gnu/machine/ssh.scm (switch-to-system, upgrade-shepherd-services)
(install-bootloader): Delete variable.
* gnu/machine/ssh.scm (deploy-managed-host): Rewrite procedure.
* gnu/services/herd.scm (live-service): Export variable.
* gnu/services/herd.scm (live-service-canonical-name): New variable.
* tests/services.scm (live-service): Delete variable.

Signed-off-by: Ludovic Courtès &lt;ludo@gnu.org&gt;
</span></span></td><td>Jakob L. Kreuze</td></tr>
<tr><td><span title='2019-06-02 01:38:36 +0200'>2019-06-02</span></td><td><a href='/guix/commit/gnu/services/herd.scm?id=bb64b2e7c0ab14cf899c1d81892b59fa877d4d9c'>herd: Use the Guile 2.2 'setvbuf' API.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/services/herd.scm (open-connection): Use 'block for 'setvbuf'.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2019-01-17 14:04:22 +0100'>2019-01-17</span></td><td><a href='/guix/commit/gnu/services/herd.scm?id=ca0c43ecf02a5451ab0dd2f855032e316b4a4792'>services: herd: Allow to pass arguments to start-service.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/services/herd.scm (start-service)[arguments]: New optional argument.
</span></span></td><td>Mathieu Othacehe</td></tr>
<tr><td><span title='2018-09-26 23:40:36 +0200'>2018-09-26</span></td><td><a href='/guix/commit/gnu/services/herd.scm?id=4245ddcbc9f935804c17c97872b90ec1050c2d75'>guix system: Load all services on reconfigure, not just stopped ones.</a><span class='msg-avail'>...<span class='msg-tooltip'>This uses the 'replacement' service slot introduced in the Shepherd
version 0.5.0.

* gnu/services/shepherd.scm (shepherd-service-upgrade): Return a list of
  services that need to be restarted to complete their upgrade.
* guix/scripts/system.scm (call-with-service-upgrade-info): Rename an internal
  variable to reflect the change to shepherd-service-upgrade.
  (upgrade-shepherd-services): Call 'load-services/safe' instead of
  'load-services'.  Print a message about services that need to be
  manually restarted.
* gnu/services/herd.scm (load-services/safe): New procedure.
* doc/guix.texi (Invoking guix system): Document the new behaviour.

Co-authored-by: Ludovic Courtès &lt;ludo@gnu.org&gt;
</span></span></td><td>Carlo Zancanaro</td></tr>
<tr><td><span title='2018-07-13 00:08:55 +0200'>2018-07-13</span></td><td><a href='/guix/commit/gnu/services/herd.scm?id=147c5aa5d4e3bd21ee4c4cae70dff8da0bcf94b7'>services: mcron: Add 'schedule' action.</a><span class='msg-avail'>...<span class='msg-tooltip'>Inspired by
&lt;https://lists.gnu.org/archive/html/help-guix/2018-07/msg00035.html&gt;.

* gnu/services/mcron.scm (shepherd-schedule-action): New procedure.
(mcron-shepherd-services): Add 'actions' field.
* gnu/tests/base.scm (run-mcron-test)["schedule action"]: New test.
* doc/guix.texi (Scheduled Job Execution): Mention 'herd schedule'.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2018-01-21 00:24:03 +0100'>2018-01-21</span></td><td><a href='/guix/commit/gnu/services/herd.scm?id=89a26478160dcf90e5df6688a9df21fe993498bf'>services: herd: 'with-shepherd' no longer leaves an open connection.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/services/herd.scm (with-shepherd): Use 'dynamic-wind' and close
CONNECTION at the end.
</span></span></td><td>Ludovic Courtès</td></tr>